Merge tag 's390-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Vasily Gorbik: - Add support for stackleak feature. Also allow specifying architecture-specific stackleak poison function to enable faster implementation. On s390, the mvc-based implementation helps decrease typical overhead from a factor of 3 to just 25% - Convert all assembler files to use SYM* style macros, deprecating the ENTRY() macro and other annotations. Select ARCH_USE_SYM_ANNOTATIONS - Improve KASLR to also randomize module and special amode31 code base load addresses - Rework decompressor memory tracking to support memory holes and improve error handling - Add support for protected virtualization AP binding - Add support for set_direct_map() calls - Implement set_memory_rox() and noexec module_alloc() - Remove obsolete overriding of mem*() functions for KASAN - Rework kexec/kdump to avoid using nodat_stack to call purgatory - Convert the rest of the s390 code to use flexible-array member instead of a zero-length array - Clean up uaccess inline asm - Enable ARCH_HAS_MEMBARRIER_SYNC_CORE - Convert to using CONFIG_FUNCTION_ALIGNMENT and enable DEBUG_FORCE_FUNCTION_ALIGN_64B - Resolve last_break in userspace fault reports - Simplify one-level sysctl registration - Clean up branch prediction handling - Rework CPU counter facility to retrieve available counter sets just once - Other various small fixes and improvements all over the code * tag 's390-6.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (118 commits) s390/stackleak: provide fast __stackleak_poison() implementation stackleak: allow to specify arch specific stackleak poison function s390: select ARCH_USE_SYM_ANNOTATIONS s390/mm: use VM_FLUSH_RESET_PERMS in module_alloc() s390: wire up memfd_secret system call s390/mm: enable ARCH_HAS_SET_DIRECT_MAP s390/mm: use BIT macro to generate SET_MEMORY bit masks s390/relocate_kernel: adjust indentation s390/relocate_kernel: use SYM* macros instead of ENTRY(), etc. s390/entry: use SYM* macros instead of ENTRY(), etc. s390/purgatory: use SYM* macros instead of ENTRY(), etc. s390/kprobes: use SYM* macros instead of ENTRY(), etc. s390/reipl: use SYM* macros instead of ENTRY(), etc. s390/head64: use SYM* macros instead of ENTRY(), etc. s390/earlypgm: use SYM* macros instead of ENTRY(), etc. s390/mcount: use SYM* macros instead of ENTRY(), etc. s390/crc32le: use SYM* macros instead of ENTRY(), etc. s390/crc32be: use SYM* macros instead of ENTRY(), etc. s390/crypto,chacha: use SYM* macros instead of ENTRY(), etc. s390/amode31: use SYM* macros instead of ENTRY(), etc. ...
author: Linus Torvalds <torvalds@linux-foundation.org> 2023-04-30 20:43:31 +0200
committer: Linus Torvalds <torvalds@linux-foundation.org> 2023-04-30 20:43:31 +0200
commit: 10de638d8ea57ebab4231ea077bed01d9bade775 (patch)
tree: f9de1b131e1a94c1cbe051e55cda1ba9b9418ee9 /arch/s390
parent: Merge tag 'kbuild-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masa... (diff)
parent: s390/stackleak: provide fast __stackleak_poison() implementation (diff)
download: linux-10de638d8ea57ebab4231ea077bed01d9bade775.tar.xz
linux-10de638d8ea57ebab4231ea077bed01d9bade775.zip
75 files changed, 1971 insertions, 1887 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 61d778397720..beb62f744c61 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -26,10 +26,6 @@ config GENERIC_BUG
 config GENERIC_BUG_RELATIVE_POINTERS
 	def_bool y
 
-config GENERIC_CSUM
-	bool
-	default y if KASAN
-
 config GENERIC_LOCKBREAK
 	def_bool y if PREEMPTION
 
@@ -76,10 +72,12 @@ config S390
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_HAS_GIGANTIC_PAGE
 	select ARCH_HAS_KCOV
+	select ARCH_HAS_MEMBARRIER_SYNC_CORE
 	select ARCH_HAS_MEM_ENCRYPT
 	select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
 	select ARCH_HAS_PTE_SPECIAL
 	select ARCH_HAS_SCALED_CPUTIME
+	select ARCH_HAS_SET_DIRECT_MAP
 	select ARCH_HAS_SET_MEMORY
 	select ARCH_HAS_STRICT_KERNEL_RWX
 	select ARCH_HAS_STRICT_MODULE_RWX
@@ -123,6 +121,7 @@ config S390
 	select ARCH_SUPPORTS_PER_VMA_LOCK
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_CMPXCHG_LOCKREF
+	select ARCH_USE_SYM_ANNOTATIONS
 	select ARCH_WANTS_DYNAMIC_TASK_STRUCT
 	select ARCH_WANTS_NO_INSTR
 	select ARCH_WANT_DEFAULT_BPF_JIT
@@ -132,6 +131,8 @@ config S390
 	select CLONE_BACKWARDS2
 	select DMA_OPS if PCI
 	select DYNAMIC_FTRACE if FUNCTION_TRACER
+	select FUNCTION_ALIGNMENT_8B if CC_IS_GCC
+	select FUNCTION_ALIGNMENT_16B if !CC_IS_GCC
 	select GCC12_NO_ARRAY_BOUNDS
 	select GENERIC_ALLOCATOR
 	select GENERIC_CPU_AUTOPROBE
@@ -153,6 +154,7 @@ config S390
 	select HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET
 	select HAVE_ARCH_SECCOMP_FILTER
 	select HAVE_ARCH_SOFT_DIRTY
+	select HAVE_ARCH_STACKLEAK
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
 	select HAVE_ARCH_VMAP_STACK
diff --git a/arch/s390/appldata/appldata_base.c b/arch/s390/appldata/appldata_base.c
index c0fd29133f27..b07b0610950e 100644
--- a/arch/s390/appldata/appldata_base.c
+++ b/arch/s390/appldata/appldata_base.c
@@ -66,16 +66,6 @@ static struct ctl_table appldata_table[] = {
 	{ },
 };
 
-static struct ctl_table appldata_dir_table[] = {
-	{
-		.procname	= appldata_proc_name,
-		.maxlen		= 0,
-		.mode		= S_IRUGO | S_IXUGO,
-		.child		= appldata_table,
-	},
-	{ },
-};
-
 /*
  * Timer
  */
@@ -291,7 +281,7 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
 	mutex_lock(&appldata_ops_mutex);
 	list_for_each(lh, &appldata_ops_list) {
 		tmp_ops = list_entry(lh, struct appldata_ops, list);
-		if (&tmp_ops->ctl_table[2] == ctl) {
+		if (&tmp_ops->ctl_table[0] == ctl) {
 			found = 1;
 		}
 	}
@@ -361,7 +351,8 @@ int appldata_register_ops(struct appldata_ops *ops)
 	if (ops->size > APPLDATA_MAX_REC_SIZE)
 		return -EINVAL;
 
-	ops->ctl_table = kcalloc(4, sizeof(struct ctl_table), GFP_KERNEL);
+	/* The last entry must be an empty one */
+	ops->ctl_table = kcalloc(2, sizeof(struct ctl_table), GFP_KERNEL);
 	if (!ops->ctl_table)
 		return -ENOMEM;
 
@@ -369,17 +360,12 @@ int appldata_register_ops(struct appldata_ops *ops)
 	list_add(&ops->list, &appldata_ops_list);
 	mutex_unlock(&appldata_ops_mutex);
 
-	ops->ctl_table[0].procname = appldata_proc_name;
-	ops->ctl_table[0].maxlen   = 0;
-	ops->ctl_table[0].mode     = S_IRUGO | S_IXUGO;
-	ops->ctl_table[0].child    = &ops->ctl_table[2];
-
-	ops->ctl_table[2].procname = ops->name;
-	ops->ctl_table[2].mode     = S_IRUGO | S_IWUSR;
-	ops->ctl_table[2].proc_handler = appldata_generic_handler;
-	ops->ctl_table[2].data = ops;
+	ops->ctl_table[0].procname = ops->name;
+	ops->ctl_table[0].mode = S_IRUGO | S_IWUSR;
+	ops->ctl_table[0].proc_handler = appldata_generic_handler;
+	ops->ctl_table[0].data = ops;
 
-	ops->sysctl_header = register_sysctl_table(ops->ctl_table);
+	ops->sysctl_header = register_sysctl(appldata_proc_name, ops->ctl_table);
 	if (!ops->sysctl_header)
 		goto out;
 	return 0;
@@ -422,7 +408,7 @@ static int __init appldata_init(void)
 	appldata_wq = alloc_ordered_workqueue("appldata", 0);
 	if (!appldata_wq)
 		return -ENOMEM;
-	appldata_sysctl_header = register_sysctl_table(appldata_dir_table);
+	appldata_sysctl_header = register_sysctl(appldata_proc_name, appldata_table);
 	return 0;
 }
 
diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile
index cebd4ca16916..c7c81e5f9218 100644
--- a/arch/s390/boot/Makefile
+++ b/arch/s390/boot/Makefile
@@ -35,7 +35,7 @@ endif
 
 CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
 
-obj-y	:= head.o als.o startup.o mem_detect.o ipl_parm.o ipl_report.o vmem.o
+obj-y	:= head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o
 obj-y	+= string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
 obj-y	+= version.o pgm_check_info.o ctype.o ipl_data.o machine_kexec_reloc.o
 obj-$(findstring y, $(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) $(CONFIG_PGSTE))	+= uv.o
diff --git a/arch/s390/boot/boot.h b/arch/s390/boot/boot.h
index 58ce701d6110..222c6886acf6 100644
--- a/arch/s390/boot/boot.h
+++ b/arch/s390/boot/boot.h
@@ -8,6 +8,8 @@
 
 #ifndef __ASSEMBLY__
 
+#include <asm/physmem_info.h>
+
 struct machine_info {
 	unsigned char has_edat1 : 1;
 	unsigned char has_edat2 : 1;
@@ -30,24 +32,46 @@ struct vmlinux_info {
 	unsigned long init_mm_off;
 	unsigned long swapper_pg_dir_off;
 	unsigned long invalid_pg_dir_off;
+#ifdef CONFIG_KASAN
+	unsigned long kasan_early_shadow_page_off;
+	unsigned long kasan_early_shadow_pte_off;
+	unsigned long kasan_early_shadow_pmd_off;
+	unsigned long kasan_early_shadow_pud_off;
+	unsigned long kasan_early_shadow_p4d_off;
+#endif
 };
 
 void startup_kernel(void);
-unsigned long detect_memory(unsigned long *safe_addr);
-void mem_detect_set_usable_limit(unsigned long limit);
+unsigned long detect_max_physmem_end(void);
+void detect_physmem_online_ranges(unsigned long max_physmem_end);
+void physmem_set_usable_limit(unsigned long limit);
+void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size);
+void physmem_free(enum reserved_range_type type);
+/* for continuous/multiple allocations per type */
+unsigned long physmem_alloc_top_down(enum reserved_range_type type, unsigned long size,
+				     unsigned long align);
+/* for single allocations, 1 per type */
+unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long size,
+				  unsigned long align, unsigned long min, unsigned long max,
+				  bool die_on_oom);
+unsigned long get_physmem_alloc_pos(void);
+bool ipl_report_certs_intersects(unsigned long addr, unsigned long size,
+				 unsigned long *intersection_start);
 bool is_ipl_block_dump(void);
 void store_ipl_parmblock(void);
-unsigned long read_ipl_report(unsigned long safe_addr);
+int read_ipl_report(void);
+void save_ipl_cert_comp_list(void);
 void setup_boot_command_line(void);
 void parse_boot_command_line(void);
 void verify_facilities(void);
 void print_missing_facilities(void);
 void sclp_early_setup_buffer(void);
 void print_pgm_check_info(void);
-unsigned long get_random_base(unsigned long safe_addr);
+unsigned long randomize_within_range(unsigned long size, unsigned long align,
+				     unsigned long min, unsigned long max);
 void setup_vmem(unsigned long asce_limit);
-unsigned long vmem_estimate_memory_needs(unsigned long online_mem_total);
 void __printf(1, 2) decompressor_printk(const char *fmt, ...);
+void print_stacktrace(unsigned long sp);
 void error(char *m);
 
 extern struct machine_info machine;
@@ -57,12 +81,11 @@ extern const char kernel_version[];
 extern unsigned long memory_limit;
 extern unsigned long vmalloc_size;
 extern int vmalloc_size_set;
-extern int kaslr_enabled;
 extern char __boot_data_start[], __boot_data_end[];
 extern char __boot_data_preserved_start[], __boot_data_preserved_end[];
 extern char _decompressor_syms_start[], _decompressor_syms_end[];
 extern char _stack_start[], _stack_end[];
-extern char _end[];
+extern char _end[], _decompressor_end[];
 extern unsigned char _compressed_start[];
 extern unsigned char _compressed_end[];
 extern struct vmlinux_info _vmlinux_info;
@@ -70,5 +93,10 @@ extern struct vmlinux_info _vmlinux_info;
 
 #define __abs_lowcore_pa(x)	(((unsigned long)(x) - __abs_lowcore) % sizeof(struct lowcore))
 
+static inline bool intersects(unsigned long addr0, unsigned long size0,
+			      unsigned long addr1, unsigned long size1)
+{
+	return addr0 + size0 > addr1 && addr1 + size1 > addr0;
+}
 #endif /* __ASSEMBLY__ */
 #endif /* BOOT_BOOT_H */
diff --git a/arch/s390/boot/install.sh b/arch/s390/boot/install.sh
index 616ba1660f08..a13dd2f2aa1c 100755
--- a/arch/s390/boot/install.sh
+++ b/arch/s390/boot/install.sh
@@ -17,8 +17,8 @@
 
 echo "Warning: '${INSTALLKERNEL}' command not available - additional " \
      "bootloader config required" >&2
-if [ -f $4/vmlinuz-$1 ]; then mv $4/vmlinuz-$1 $4/vmlinuz-$1.old; fi
-if [ -f $4/System.map-$1 ]; then mv $4/System.map-$1 $4/System.map-$1.old; fi
+if [ -f "$4/vmlinuz-$1" ]; then mv -- "$4/vmlinuz-$1" "$4/vmlinuz-$1.old"; fi
+if [ -f "$4/System.map-$1" ]; then mv -- "$4/System.map-$1" "$4/System.map-$1.old"; fi
 
-cat $2 > $4/vmlinuz-$1
-cp $3 $4/System.map-$1
+cat -- "$2" > "$4/vmlinuz-$1"
+cp -- "$3" "$4/System.map-$1"
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c
index c1f8f7999fed..8753cb0339e5 100644
--- a/arch/s390/boot/ipl_parm.c
+++ b/arch/s390/boot/ipl_parm.c
@@ -24,11 +24,11 @@ int __bootdata(noexec_disabled);
 unsigned int __bootdata_preserved(zlib_dfltcc_support) = ZLIB_DFLTCC_FULL;
 struct ipl_parameter_block __bootdata_preserved(ipl_block);
 int __bootdata_preserved(ipl_block_valid);
+int __bootdata_preserved(__kaslr_enabled);
 
 unsigned long vmalloc_size = VMALLOC_DEFAULT_SIZE;
 unsigned long memory_limit;
 int vmalloc_size_set;
-int kaslr_enabled;
 
 static inline int __diag308(unsigned long subcode, void *addr)
 {
@@ -264,7 +264,7 @@ void parse_boot_command_line(void)
 	char *args;
 	int rc;
 
-	kaslr_enabled = IS_ENABLED(CONFIG_RANDOMIZE_BASE);
+	__kaslr_enabled = IS_ENABLED(CONFIG_RANDOMIZE_BASE);
 	args = strcpy(command_line_buf, early_command_line);
 	while (*args) {
 		args = next_arg(args, &param, &val);
@@ -300,7 +300,7 @@ void parse_boot_command_line(void)
 			modify_fac_list(val);
 
 		if (!strcmp(param, "nokaslr"))
-			kaslr_enabled = 0;
+			__kaslr_enabled = 0;
 
 #if IS_ENABLED(CONFIG_KVM)
 		if (!strcmp(param, "prot_virt")) {
diff --git a/arch/s390/boot/ipl_report.c b/arch/s390/boot/ipl_report.c
index 74b5cd264862..1803035e68d2 100644
--- a/arch/s390/boot/ipl_report.c
+++ b/arch/s390/boot/ipl_report.c
@@ -5,6 +5,7 @@
 #include <asm/sclp.h>
 #include <asm/sections.h>
 #include <asm/boot_data.h>
+#include <asm/physmem_info.h>
 #include <uapi/asm/ipl.h>
 #include "boot.h"
 
@@ -16,20 +17,16 @@ unsigned long __bootdata_preserved(ipl_cert_list_size);
 unsigned long __bootdata(early_ipl_comp_list_addr);
 unsigned long __bootdata(early_ipl_comp_list_size);
 
+static struct ipl_rb_certificates *certs;
+static struct ipl_rb_components *comps;
+static bool ipl_report_needs_saving;
+
 #define for_each_rb_entry(entry, rb) \
 	for (entry = rb->entries; \
 	     (void *) entry + sizeof(*entry) <= (void *) rb + rb->len; \
 	     entry++)
 
-static inline bool intersects(unsigned long addr0, unsigned long size0,
-			      unsigned long addr1, unsigned long size1)
-{
-	return addr0 + size0 > addr1 && addr1 + size1 > addr0;
-}
-
-static unsigned long find_bootdata_space(struct ipl_rb_components *comps,
-					 struct ipl_rb_certificates *certs,
-					 unsigned long safe_addr)
+static unsigned long get_cert_comp_list_size(void)
 {
 	struct ipl_rb_certificate_entry *cert;
 	struct ipl_rb_component_entry *comp;
@@ -44,44 +41,27 @@ static unsigned long find_bootdata_space(struct ipl_rb_components *comps,
 	ipl_cert_list_size = 0;
 	for_each_rb_entry(cert, certs)
 		ipl_cert_list_size += sizeof(unsigned int) + cert->len;
-	size = ipl_cert_list_size + early_ipl_comp_list_size;
+	return ipl_cert_list_size + early_ipl_comp_list_size;
+}
 
-	/*
-	 * Start from safe_addr to find a free memory area large
-	 * enough for the IPL report boot data. This area is used
-	 * for ipl_cert_list_addr/ipl_cert_list_size and
-	 * early_ipl_comp_list_addr/early_ipl_comp_list_size. It must
-	 * not overlap with any component or any certificate.
-	 */
-repeat:
-	if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && initrd_data.start && initrd_data.size &&
-	    intersects(initrd_data.start, initrd_data.size, safe_addr, size))
-		safe_addr = initrd_data.start + initrd_data.size;
-	if (intersects(safe_addr, size, (unsigned long)comps, comps->len)) {
-		safe_addr = (unsigned long)comps + comps->len;
-		goto repeat;
-	}
-	for_each_rb_entry(comp, comps)
-		if (intersects(safe_addr, size, comp->addr, comp->len)) {
-			safe_addr = comp->addr + comp->len;
-			goto repeat;
+bool ipl_report_certs_intersects(unsigned long addr, unsigned long size,
+				 unsigned long *intersection_start)
+{
+	struct ipl_rb_certificate_entry *cert;
+
+	if (!ipl_report_needs_saving)
+		return false;
+
+	for_each_rb_entry(cert, certs) {
+		if (intersects(addr, size, cert->addr, cert->len)) {
+			*intersection_start = cert->addr;
+			return true;
 		}
-	if (intersects(safe_addr, size, (unsigned long)certs, certs->len)) {
-		safe_addr = (unsigned long)certs + certs->len;
-		goto repeat;
 	}
-	for_each_rb_entry(cert, certs)
-		if (intersects(safe_addr, size, cert->addr, cert->len)) {
-			safe_addr = cert->addr + cert->len;
-			goto repeat;
-		}
-	early_ipl_comp_list_addr = safe_addr;
-	ipl_cert_list_addr = safe_addr + early_ipl_comp_list_size;
-
-	return safe_addr + size;
+	return false;
 }
 
-static void copy_components_bootdata(struct ipl_rb_components *comps)
+static void copy_components_bootdata(void)
 {
 	struct ipl_rb_component_entry *comp, *ptr;
 
@@ -90,7 +70,7 @@ static void copy_components_bootdata(struct ipl_rb_components *comps)
 		memcpy(ptr++, comp, sizeof(*ptr));
 }
 
-static void copy_certificates_bootdata(struct ipl_rb_certificates *certs)
+static void copy_certificates_bootdata(void)
 {
 	struct ipl_rb_certificate_entry *cert;
 	void *ptr;
@@ -104,10 +84,8 @@ static void copy_certificates_bootdata(struct ipl_rb_certificates *certs)
 	}
 }
 
-unsigned long read_ipl_report(unsigned long safe_addr)
+int read_ipl_report(void)
 {
-	struct ipl_rb_certificates *certs;
-	struct ipl_rb_components *comps;
 	struct ipl_pl_hdr *pl_hdr;
 	struct ipl_rl_hdr *rl_hdr;
 	struct ipl_rb_hdr *rb_hdr;
@@ -120,7 +98,7 @@ unsigned long read_ipl_report(unsigned long safe_addr)
 	 */
 	if (!ipl_block_valid ||
 	    !(ipl_block.hdr.flags & IPL_PL_FLAG_IPLSR))
-		return safe_addr;
+		return -1;
 	ipl_secure_flag = !!(ipl_block.hdr.flags & IPL_PL_FLAG_SIPL);
 	/*
 	 * There is an IPL report, to find it load the pointer to the
@@ -158,16 +136,30 @@ unsigned long read_ipl_report(unsigned long safe_addr)
 	 * With either the component list or the certificate list
 	 * missing the kernel will stay ignorant of secure IPL.
 	 */
-	if (!comps || !certs)
-		return safe_addr;
+	if (!comps || !certs) {
+		certs = NULL;
+		return -1;
+	}
 
-	/*
-	 * Copy component and certificate list to a safe area
-	 * where the decompressed kernel can find them.
-	 */
-	safe_addr = find_bootdata_space(comps, certs, safe_addr);
-	copy_components_bootdata(comps);
-	copy_certificates_bootdata(certs);
+	ipl_report_needs_saving = true;
+	physmem_reserve(RR_IPLREPORT, (unsigned long)pl_hdr,
+			(unsigned long)rl_end - (unsigned long)pl_hdr);
+	return 0;
+}
+
+void save_ipl_cert_comp_list(void)
+{
+	unsigned long size;
+
+	if (!ipl_report_needs_saving)
+		return;
+
+	size = get_cert_comp_list_size();
+	early_ipl_comp_list_addr = physmem_alloc_top_down(RR_CERT_COMP_LIST, size, sizeof(int));
+	ipl_cert_list_addr = early_ipl_comp_list_addr + early_ipl_comp_list_size;
 
-	return safe_addr;
+	copy_components_bootdata();
+	copy_certificates_bootdata();
+	physmem_free(RR_IPLREPORT);
+	ipl_report_needs_saving = false;
 }
diff --git a/arch/s390/boot/kaslr.c b/arch/s390/boot/kaslr.c
index 3e3d846400b4..90602101e2ae 100644
--- a/arch/s390/boot/kaslr.c
+++ b/arch/s390/boot/kaslr.c
@@ -3,7 +3,7 @@
  * Copyright IBM Corp. 2019
  */
 #include <linux/pgtable.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/cpacf.h>
 #include <asm/timex.h>
 #include <asm/sclp.h>
@@ -91,113 +91,108 @@ static int get_random(unsigned long limit, unsigned long *value)
 	return 0;
 }
 
-/*
- * To randomize kernel base address we have to consider several facts:
- * 1. physical online memory might not be continuous and have holes. mem_detect
- *    info contains list of online memory ranges we should consider.
- * 2. we have several memory regions which are occupied and we should not
- *    overlap and destroy them. Currently safe_addr tells us the border below
- *    which all those occupied regions are. We are safe to use anything above
- *    safe_addr.
- * 3. the upper limit might apply as well, even if memory above that limit is
- *    online. Currently those limitations are:
- *    3.1. Limit set by "mem=" kernel command line option
- *    3.2. memory reserved at the end for kasan initialization.
- * 4. kernel base address must be aligned to THREAD_SIZE (kernel stack size).
- *    Which is required for CONFIG_CHECK_STACK. Currently THREAD_SIZE is 4 pages
- *    (16 pages when the kernel is built with kasan enabled)
- * Assumptions:
- * 1. kernel size (including .bss size) and upper memory limit are page aligned.
- * 2. mem_detect memory region start is THREAD_SIZE aligned / end is PAGE_SIZE
- *    aligned (in practice memory configurations granularity on z/VM and LPAR
- *    is 1mb).
- *
- * To guarantee uniform distribution of kernel base address among all suitable
- * addresses we generate random value just once. For that we need to build a
- * continuous range in which every value would be suitable. We can build this
- * range by simply counting all suitable addresses (let's call them positions)
- * which would be valid as kernel base address. To count positions we iterate
- * over online memory ranges. For each range which is big enough for the
- * kernel image we count all suitable addresses we can put the kernel image at
- * that is
- * (end - start - kernel_size) / THREAD_SIZE + 1
- * Two functions count_valid_kernel_positions and position_to_address help
- * to count positions in memory range given and then convert position back
- * to address.
- */
-static unsigned long count_valid_kernel_positions(unsigned long kernel_size,
-						  unsigned long _min,
-						  unsigned long _max)
+static void sort_reserved_ranges(struct reserved_range *res, unsigned long size)
 {
-	unsigned long start, end, pos = 0;
-	int i;
-
-	for_each_mem_detect_usable_block(i, &start, &end) {
-		if (_min >= end)
-			continue;
-		if (start >= _max)
-			break;
-		start = max(_min, start);
-		end = min(_max, end);
-		if (end - start < kernel_size)
-			continue;
-		pos += (end - start - kernel_size) / THREAD_SIZE + 1;
+	struct reserved_range tmp;
+	int i, j;
+
+	for (i = 1; i < size; i++) {
+		tmp = res[i];
+		for (j = i - 1; j >= 0 && res[j].start > tmp.start; j--)
+			res[j + 1] = res[j];
+		res[j + 1] = tmp;
 	}
-
-	return pos;
 }
 
-static unsigned long position_to_address(unsigned long pos, unsigned long kernel_size,
-				 unsigned long _min, unsigned long _max)
+static unsigned long iterate_valid_positions(unsigned long size, unsigned long align,
+					     unsigned long _min, unsigned long _max,
+					     struct reserved_range *res, size_t res_count,
+					     bool pos_count, unsigned long find_pos)
 {
-	unsigned long start, end;
+	unsigned long start, end, tmp_end, range_pos, pos = 0;
+	struct reserved_range *res_end = res + res_count;
+	struct reserved_range *skip_res;
 	int i;
 
-	for_each_mem_detect_usable_block(i, &start, &end) {
+	align = max(align, 8UL);
+	_min = round_up(_min, align);
+	for_each_physmem_usable_range(i, &start, &end) {
 		if (_min >= end)
 			continue;
+		start = round_up(start, align);
 		if (start >= _max)
 			break;
 		start = max(_min, start);
 		end = min(_max, end);
-		if (end - start < kernel_size)
-			continue;
-		if ((end - start - kernel_size) / THREAD_SIZE + 1 >= pos)
-			return start + (pos - 1) * THREAD_SIZE;
-		pos -= (end - start - kernel_size) / THREAD_SIZE + 1;
+
+		while (start + size <= end) {
+			/* skip reserved ranges below the start */
+			while (res && res->end <= start) {
+				res++;
+				if (res >= res_end)
+					res = NULL;
+			}
+			skip_res = NULL;
+			tmp_end = end;
+			/* has intersecting reserved range */
+			if (res && res->start < end) {
+				skip_res = res;
+				tmp_end = res->start;
+			}
+			if (start + size <= tmp_end) {
+				range_pos = (tmp_end - start - size) / align + 1;
+				if (pos_count) {
+					pos += range_pos;
+				} else {
+					if (range_pos >= find_pos)
+						return start + (find_pos - 1) * align;
+					find_pos -= range_pos;
+				}
+			}
+			if (!skip_res)
+				break;
+			start = round_up(skip_res->end, align);
+		}
 	}
 
-	return 0;
+	return pos_count ? pos : 0;
 }
 
-unsigned long get_random_base(unsigned long safe_addr)
+/*
+ * Two types of decompressor memory allocations/reserves are considered
+ * differently.
+ *
+ * "Static" or "single" allocations are done via physmem_alloc_range() and
+ * physmem_reserve(), and they are listed in physmem_info.reserved[]. Each
+ * type of "static" allocation can only have one allocation per type and
+ * cannot have chains.
+ *
+ * On the other hand, "dynamic" or "repetitive" allocations are done via
+ * physmem_alloc_top_down(). These allocations are tightly packed together
+ * top down from the end of online memory. physmem_alloc_pos represents
+ * current position where those allocations start.
+ *
+ * Functions randomize_within_range() and iterate_valid_positions()
+ * only consider "dynamic" allocations by never looking above
+ * physmem_alloc_pos. "Static" allocations, however, are explicitly
+ * considered by checking the "res" (reserves) array. The first
+ * reserved_range of a "dynamic" allocation may also be checked along the
+ * way, but it will always be above the maximum value anyway.
+ */
+unsigned long randomize_within_range(unsigned long size, unsigned long align,
+				     unsigned long min, unsigned long max)
 {
-	unsigned long usable_total = get_mem_detect_usable_total();
-	unsigned long memory_limit = get_mem_detect_end();
-	unsigned long base_pos, max_pos, kernel_size;
-	int i;
-
-	/*
-	 * Avoid putting kernel in the end of physical memory
-	 * which vmem and kasan code will use for shadow memory and
-	 * pgtable mapping allocations.
-	 */
-	memory_limit -= kasan_estimate_memory_needs(usable_total);
-	memory_limit -= vmem_estimate_memory_needs(usable_total);
+	struct reserved_range res[RR_MAX];
+	unsigned long max_pos, pos;
 
-	safe_addr = ALIGN(safe_addr, THREAD_SIZE);
-	kernel_size = vmlinux.image_size + vmlinux.bss_size;
-	if (safe_addr + kernel_size > memory_limit)
-		return 0;
+	memcpy(res, physmem_info.reserved, sizeof(res));
+	sort_reserved_ranges(res, ARRAY_SIZE(res));
+	max = min(max, get_physmem_alloc_pos());
 
-	max_pos = count_valid_kernel_positions(kernel_size, safe_addr, memory_limit);
-	if (!max_pos) {
-		sclp_early_printk("KASLR disabled: not enough memory\n");
+	max_pos = iterate_valid_positions(size, align, min, max, res, ARRAY_SIZE(res), true, 0);
+	if (!max_pos)
 		return 0;
-	}
-
-	/* we need a value in the range [1, base_pos] inclusive */
-	if (get_random(max_pos, &base_pos))
+	if (get_random(max_pos, &pos))
 		return 0;
-	return position_to_address(base_pos + 1, kernel_size, safe_addr, memory_limit);
+	return iterate_valid_positions(size, align, min, max, res, ARRAY_SIZE(res), false, pos + 1);
 }
diff --git a/arch/s390/boot/mem_detect.c b/arch/s390/boot/mem_detect.c
deleted file mode 100644
index 35f4ba11f7fd..000000000000
--- a/arch/s390/boot/mem_detect.c
+++ /dev/null
@@ -1,191 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <asm/setup.h>
-#include <asm/processor.h>
-#include <asm/sclp.h>
-#include <asm/sections.h>
-#include <asm/mem_detect.h>
-#include <asm/sparsemem.h>
-#include "decompressor.h"
-#include "boot.h"
-
-struct mem_detect_info __bootdata(mem_detect);
-
-/* up to 256 storage elements, 1020 subincrements each */
-#define ENTRIES_EXTENDED_MAX						       \
-	(256 * (1020 / 2) * sizeof(struct mem_detect_block))
-
-static struct mem_detect_block *__get_mem_detect_block_ptr(u32 n)
-{
-	if (n < MEM_INLINED_ENTRIES)
-		return &mem_detect.entries[n];
-	return &mem_detect.entries_extended[n - MEM_INLINED_ENTRIES];
-}
-
-/*
- * sequential calls to add_mem_detect_block with adjacent memory areas
- * are merged together into single memory block.
- */
-void add_mem_detect_block(u64 start, u64 end)
-{
-	struct mem_detect_block *block;
-
-	if (mem_detect.count) {
-		block = __get_mem_detect_block_ptr(mem_detect.count - 1);
-		if (block->end == start) {
-			block->end = end;
-			return;
-		}
-	}
-
-	block = __get_mem_detect_block_ptr(mem_detect.count);
-	block->start = start;
-	block->end = end;
-	mem_detect.count++;
-}
-
-static int __diag260(unsigned long rx1, unsigned long rx2)
-{
-	unsigned long reg1, reg2, ry;
-	union register_pair rx;
-	psw_t old;
-	int rc;
-
-	rx.even = rx1;
-	rx.odd	= rx2;
-	ry = 0x10; /* storage configuration */
-	rc = -1;   /* fail */
-	asm volatile(
-		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
-		"	epsw	%[reg1],%[reg2]\n"
-		"	st	%[reg1],0(%[psw_pgm])\n"
-		"	st	%[reg2],4(%[psw_pgm])\n"
-		"	larl	%[reg1],1f\n"
-		"	stg	%[reg1],8(%[psw_pgm])\n"
-		"	diag	%[rx],%[ry],0x260\n"
-		"	ipm	%[rc]\n"
-		"	srl	%[rc],28\n"
-		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
-		: [reg1] "=&d" (reg1),
-		  [reg2] "=&a" (reg2),
-		  [rc] "+&d" (rc),
-		  [ry] "+&d" (ry),
-		  "+Q" (S390_lowcore.program_new_psw),
-		  "=Q" (old)
-		: [rx] "d" (rx.pair),
-		  [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&S390_lowcore.program_new_psw)
-		: "cc", "memory");
-	return rc == 0 ? ry : -1;
-}
-
-static int diag260(void)
-{
-	int rc, i;
-
-	struct {
-		unsigned long start;
-		unsigned long end;
-	} storage_extents[8] __aligned(16); /* VM supports up to 8 extends */
-
-	memset(storage_extents, 0, sizeof(storage_extents));
-	rc = __diag260((unsigned long)storage_extents, sizeof(storage_extents));
-	if (rc == -1)
-		return -1;
-
-	for (i = 0; i < min_t(int, rc, ARRAY_SIZE(storage_extents)); i++)
-		add_mem_detect_block(storage_extents[i].start, storage_extents[i].end + 1);
-	return 0;
-}
-
-static int tprot(unsigned long addr)
-{
-	unsigned long reg1, reg2;
-	int rc = -EFAULT;
-	psw_t old;
-
-	asm volatile(
-		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
-		"	epsw	%[reg1],%[reg2]\n"
-		"	st	%[reg1],0(%[psw_pgm])\n"
-		"	st	%[reg2],4(%[psw_pgm])\n"
-		"	larl	%[reg1],1f\n"
-		"	stg	%[reg1],8(%[psw_pgm])\n"
-		"	tprot	0(%[addr]),0\n"
-		"	ipm	%[rc]\n"
-		"	srl	%[rc],28\n"
-		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
-		: [reg1] "=&d" (reg1),
-		  [reg2] "=&a" (reg2),
-		  [rc] "+&d" (rc),
-		  "=Q" (S390_lowcore.program_new_psw.addr),
-		  "=Q" (old)
-		: [psw_old] "a" (&old),
-		  [psw_pgm] "a" (&S390_lowcore.program_new_psw),
-		  [addr] "a" (addr)
-		: "cc", "memory");
-	return rc;
-}
-
-static unsigned long search_mem_end(void)
-{
-	unsigned long range = 1 << (MAX_PHYSMEM_BITS - 20); /* in 1MB blocks */
-	unsigned long offset = 0;
-	unsigned long pivot;
-
-	while (range > 1) {
-		range >>= 1;
-		pivot = offset + range;
-		if (!tprot(pivot << 20))
-			offset = pivot;
-	}
-	return (offset + 1) << 20;
-}
-
-unsigned long detect_memory(unsigned long *safe_addr)
-{
-	unsigned long max_physmem_end = 0;
-
-	sclp_early_get_memsize(&max_physmem_end);
-	mem_detect.entries_extended = (struct mem_detect_block *)ALIGN(*safe_addr, sizeof(u64));
-
-	if (!sclp_early_read_storage_info()) {
-		mem_detect.info_source = MEM_DETECT_SCLP_STOR_INFO;
-	} else if (!diag260()) {
-		mem_detect.info_source = MEM_DETECT_DIAG260;
-		max_physmem_end = max_physmem_end ?: get_mem_detect_end();
-	} else if (max_physmem_end) {
-		add_mem_detect_block(0, max_physmem_end);
-		mem_detect.info_source = MEM_DETECT_SCLP_READ_INFO;
-	} else {
-		max_physmem_end = search_mem_end();
-		add_mem_detect_block(0, max_physmem_end);
-		mem_detect.info_source = MEM_DETECT_BIN_SEARCH;
-	}
-
-	if (mem_detect.count > MEM_INLINED_ENTRIES) {
-		*safe_addr += (mem_detect.count - MEM_INLINED_ENTRIES) *
-			     sizeof(struct mem_detect_block);
-	}
-
-	return max_physmem_end;
-}
-
-void mem_detect_set_usable_limit(unsigned long limit)
-{
-	struct mem_detect_block *block;
-	int i;
-
-	/* make sure mem_detect.usable ends up within online memory block */
-	for (i = 0; i < mem_detect.count; i++) {
-		block = __get_mem_detect_block_ptr(i);
-		if (block->start >= limit)
-			break;
-		if (block->end >= limit) {
-			mem_detect.usable = limit;
-			break;
-		}
-		mem_detect.usable = block->end;
-	}
-}
diff --git a/arch/s390/boot/pgm_check_info.c b/arch/s390/boot/pgm_check_info.c
index c2a1defc79da..97244cd7a206 100644
--- a/arch/s390/boot/pgm_check_info.c
+++ b/arch/s390/boot/pgm_check_info.c
@@ -123,11 +123,10 @@ out:
 	sclp_early_printk(buf);
 }
 
-static noinline void print_stacktrace(void)
+void print_stacktrace(unsigned long sp)
 {
 	struct stack_info boot_stack = { STACK_TYPE_TASK, (unsigned long)_stack_start,
 					 (unsigned long)_stack_end };
-	unsigned long sp = S390_lowcore.gpregs_save_area[15];
 	bool first = true;
 
 	decompressor_printk("Call Trace:\n");
@@ -154,7 +153,7 @@ void print_pgm_check_info(void)
 		decompressor_printk("Kernel command line: %s\n", early_command_line);
 	decompressor_printk("Kernel fault: interruption code %04x ilc:%x\n",
 			    S390_lowcore.pgm_code, S390_lowcore.pgm_ilc >> 1);
-	if (kaslr_enabled)
+	if (kaslr_enabled())
 		decompressor_printk("Kernel random base: %lx\n", __kaslr_offset);
 	decompressor_printk("PSW : %016lx %016lx (%pS)\n",
 			    S390_lowcore.psw_save_area.mask,
@@ -173,7 +172,7 @@ void print_pgm_check_info(void)
 			    gpregs[8], gpregs[9], gpregs[10], gpregs[11]);
 	decompressor_printk("      %016lx %016lx %016lx %016lx\n",
 			    gpregs[12], gpregs[13], gpregs[14], gpregs[15]);
-	print_stacktrace();
+	print_stacktrace(S390_lowcore.gpregs_save_area[15]);
 	decompressor_printk("Last Breaking-Event-Address:\n");
 	decompressor_printk(" [<%016lx>] %pS\n", (unsigned long)S390_lowcore.pgm_last_break,
 			    (void *)S390_lowcore.pgm_last_break);
diff --git a/arch/s390/boot/physmem_info.c b/arch/s390/boot/physmem_info.c
new file mode 100644
index 000000000000..0cf79826eef9
--- /dev/null
+++ b/arch/s390/boot/physmem_info.c
@@ -0,0 +1,328 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/processor.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <asm/physmem_info.h>
+#include <asm/stacktrace.h>
+#include <asm/boot_data.h>
+#include <asm/sparsemem.h>
+#include <asm/sections.h>
+#include <asm/setup.h>
+#include <asm/sclp.h>
+#include <asm/uv.h>
+#include "decompressor.h"
+#include "boot.h"
+
+struct physmem_info __bootdata(physmem_info);
+static unsigned int physmem_alloc_ranges;
+static unsigned long physmem_alloc_pos;
+
+/* up to 256 storage elements, 1020 subincrements each */
+#define ENTRIES_EXTENDED_MAX						       \
+	(256 * (1020 / 2) * sizeof(struct physmem_range))
+
+static struct physmem_range *__get_physmem_range_ptr(u32 n)
+{
+	if (n < MEM_INLINED_ENTRIES)
+		return &physmem_info.online[n];
+	if (unlikely(!physmem_info.online_extended)) {
+		physmem_info.online_extended = (struct physmem_range *)physmem_alloc_range(
+			RR_MEM_DETECT_EXTENDED, ENTRIES_EXTENDED_MAX, sizeof(long), 0,
+			physmem_alloc_pos, true);
+	}
+	return &physmem_info.online_extended[n - MEM_INLINED_ENTRIES];
+}
+
+/*
+ * sequential calls to add_physmem_online_range with adjacent memory ranges
+ * are merged together into single memory range.
+ */
+void add_physmem_online_range(u64 start, u64 end)
+{
+	struct physmem_range *range;
+
+	if (physmem_info.range_count) {
+		range = __get_physmem_range_ptr(physmem_info.range_count - 1);
+		if (range->end == start) {
+			range->end = end;
+			return;
+		}
+	}
+
+	range = __get_physmem_range_ptr(physmem_info.range_count);
+	range->start = start;
+	range->end = end;
+	physmem_info.range_count++;
+}
+
+static int __diag260(unsigned long rx1, unsigned long rx2)
+{
+	unsigned long reg1, reg2, ry;
+	union register_pair rx;
+	psw_t old;
+	int rc;
+
+	rx.even = rx1;
+	rx.odd	= rx2;
+	ry = 0x10; /* storage configuration */
+	rc = -1;   /* fail */
+	asm volatile(
+		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
+		"	epsw	%[reg1],%[reg2]\n"
+		"	st	%[reg1],0(%[psw_pgm])\n"
+		"	st	%[reg2],4(%[psw_pgm])\n"
+		"	larl	%[reg1],1f\n"
+		"	stg	%[reg1],8(%[psw_pgm])\n"
+		"	diag	%[rx],%[ry],0x260\n"
+		"	ipm	%[rc]\n"
+		"	srl	%[rc],28\n"
+		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
+		: [reg1] "=&d" (reg1),
+		  [reg2] "=&a" (reg2),
+		  [rc] "+&d" (rc),
+		  [ry] "+&d" (ry),
+		  "+Q" (S390_lowcore.program_new_psw),
+		  "=Q" (old)
+		: [rx] "d" (rx.pair),
+		  [psw_old] "a" (&old),
+		  [psw_pgm] "a" (&S390_lowcore.program_new_psw)
+		: "cc", "memory");
+	return rc == 0 ? ry : -1;
+}
+
+static int diag260(void)
+{
+	int rc, i;
+
+	struct {
+		unsigned long start;
+		unsigned long end;
+	} storage_extents[8] __aligned(16); /* VM supports up to 8 extends */
+
+	memset(storage_extents, 0, sizeof(storage_extents));
+	rc = __diag260((unsigned long)storage_extents, sizeof(storage_extents));
+	if (rc == -1)
+		return -1;
+
+	for (i = 0; i < min_t(int, rc, ARRAY_SIZE(storage_extents)); i++)
+		add_physmem_online_range(storage_extents[i].start, storage_extents[i].end + 1);
+	return 0;
+}
+
+static int tprot(unsigned long addr)
+{
+	unsigned long reg1, reg2;
+	int rc = -EFAULT;
+	psw_t old;
+
+	asm volatile(
+		"	mvc	0(16,%[psw_old]),0(%[psw_pgm])\n"
+		"	epsw	%[reg1],%[reg2]\n"
+		"	st	%[reg1],0(%[psw_pgm])\n"
+		"	st	%[reg2],4(%[psw_pgm])\n"
+		"	larl	%[reg1],1f\n"
+		"	stg	%[reg1],8(%[psw_pgm])\n"
+		"	tprot	0(%[addr]),0\n"
+		"	ipm	%[rc]\n"
+		"	srl	%[rc],28\n"
+		"1:	mvc	0(16,%[psw_pgm]),0(%[psw_old])\n"
+		: [reg1] "=&d" (reg1),
+		  [reg2] "=&a" (reg2),
+		  [rc] "+&d" (rc),
+		  "=Q" (S390_lowcore.program_new_psw.addr),
+		  "=Q" (old)
+		: [psw_old] "a" (&old),
+		  [psw_pgm] "a" (&S390_lowcore.program_new_psw),
+		  [addr] "a" (addr)
+		: "cc", "memory");
+	return rc;
+}
+
+static unsigned long search_mem_end(void)
+{
+	unsigned long range = 1 << (MAX_PHYSMEM_BITS - 20); /* in 1MB blocks */
+	unsigned long offset = 0;
+	unsigned long pivot;
+
+	while (range > 1) {
+		range >>= 1;
+		pivot = offset + range;
+		if (!tprot(pivot << 20))
+			offset = pivot;
+	}
+	return (offset + 1) << 20;
+}
+
+unsigned long detect_max_physmem_end(void)
+{
+	unsigned long max_physmem_end = 0;
+
+	if (!sclp_early_get_memsize(&max_physmem_end)) {
+		physmem_info.info_source = MEM_DETECT_SCLP_READ_INFO;
+	} else {
+		max_physmem_end = search_mem_end();
+		physmem_info.info_source = MEM_DETECT_BIN_SEARCH;
+	}
+	return max_physmem_end;
+}
+
+void detect_physmem_online_ranges(unsigned long max_physmem_end)
+{
+	if (!sclp_early_read_storage_info()) {
+		physmem_info.info_source = MEM_DETECT_SCLP_STOR_INFO;
+	} else if (!diag260()) {
+		physmem_info.info_source = MEM_DETECT_DIAG260;
+	} else if (max_physmem_end) {
+		add_physmem_online_range(0, max_physmem_end);
+	}
+}
+
+void physmem_set_usable_limit(unsigned long limit)
+{
+	physmem_info.usable = limit;
+	physmem_alloc_pos = limit;
+}
+
+static void die_oom(unsigned long size, unsigned long align, unsigned long min, unsigned long max)
+{
+	unsigned long start, end, total_mem = 0, total_reserved_mem = 0;
+	struct reserved_range *range;
+	enum reserved_range_type t;
+	int i;
+
+	decompressor_printk("Linux version %s\n", kernel_version);
+	if (!is_prot_virt_guest() && early_command_line[0])
+		decompressor_printk("Kernel command line: %s\n", early_command_line);
+	decompressor_printk("Out of memory allocating %lx bytes %lx aligned in range %lx:%lx\n",
+			    size, align, min, max);
+	decompressor_printk("Reserved memory ranges:\n");
+	for_each_physmem_reserved_range(t, range, &start, &end) {
+		decompressor_printk("%016lx %016lx %s\n", start, end, get_rr_type_name(t));
+		total_reserved_mem += end - start;
+	}
+	decompressor_printk("Usable online memory ranges (info source: %s [%x]):\n",
+			    get_physmem_info_source(), physmem_info.info_source);
+	for_each_physmem_usable_range(i, &start, &end) {
+		decompressor_printk("%016lx %016lx\n", start, end);
+		total_mem += end - start;
+	}
+	decompressor_printk("Usable online memory total: %lx Reserved: %lx Free: %lx\n",
+			    total_mem, total_reserved_mem,
+			    total_mem > total_reserved_mem ? total_mem - total_reserved_mem : 0);
+	print_stacktrace(current_frame_address());
+	sclp_early_printk("\n\n -- System halted\n");
+	disabled_wait();
+}
+
+void physmem_reserve(enum reserved_range_type type, unsigned long addr, unsigned long size)
+{
+	physmem_info.reserved[type].start = addr;
+	physmem_info.reserved[type].end = addr + size;
+}
+
+void physmem_free(enum reserved_range_type type)
+{
+	physmem_info.reserved[type].start = 0;
+	physmem_info.reserved[type].end = 0;
+}
+
+static bool __physmem_alloc_intersects(unsigned long addr, unsigned long size,
+				       unsigned long *intersection_start)
+{
+	unsigned long res_addr, res_size;
+	int t;
+
+	for (t = 0; t < RR_MAX; t++) {
+		if (!get_physmem_reserved(t, &res_addr, &res_size))
+			continue;
+		if (intersects(addr, size, res_addr, res_size)) {
+			*intersection_start = res_addr;
+			return true;
+		}
+	}
+	return ipl_report_certs_intersects(addr, size, intersection_start);
+}
+
+static unsigned long __physmem_alloc_range(unsigned long size, unsigned long align,
+					   unsigned long min, unsigned long max,
+					   unsigned int from_ranges, unsigned int *ranges_left,
+					   bool die_on_oom)
+{
+	unsigned int nranges = from_ranges ?: physmem_info.range_count;
+	unsigned long range_start, range_end;
+	unsigned long intersection_start;
+	unsigned long addr, pos = max;
+
+	align = max(align, 8UL);
+	while (nranges) {
+		__get_physmem_range(nranges - 1, &range_start, &range_end, false);
+		pos = min(range_end, pos);
+
+		if (round_up(min, align) + size > pos)
+			break;
+		addr = round_down(pos - size, align);
+		if (range_start > addr) {
+			nranges--;
+			continue;
+		}
+		if (__physmem_alloc_intersects(addr, size, &intersection_start)) {
+			pos = intersection_start;
+			continue;
+		}
+
+		if (ranges_left)
+			*ranges_left = nranges;
+		return addr;
+	}
+	if (die_on_oom)
+		die_oom(size, align, min, max);
+	return 0;
+}
+
+unsigned long physmem_alloc_range(enum reserved_range_type type, unsigned long size,
+				  unsigned long align, unsigned long min, unsigned long max,
+				  bool die_on_oom)
+{
+	unsigned long addr;
+
+	max = min(max, physmem_alloc_pos);
+	addr = __physmem_alloc_range(size, align, min, max, 0, NULL, die_on_oom);
+	if (addr)
+		physmem_reserve(type, addr, size);
+	return addr;
+}
+
+unsigned long physmem_alloc_top_down(enum reserved_range_type type, unsigned long size,
+				     unsigned long align)
+{
+	struct reserved_range *range = &physmem_info.reserved[type];
+	struct reserved_range *new_range;
+	unsigned int ranges_left;
+	unsigned long addr;
+
+	addr = __physmem_alloc_range(size, align, 0, physmem_alloc_pos, physmem_alloc_ranges,
+				     &ranges_left, true);
+	/* if not a consecutive allocation of the same type or first allocation */
+	if (range->start != addr + size) {
+		if (range->end) {
+			physmem_alloc_pos = __physmem_alloc_range(
+				sizeof(struct reserved_range), 0, 0, physmem_alloc_pos,
+				physmem_alloc_ranges, &ranges_left, true);
+			new_range = (struct reserved_range *)physmem_alloc_pos;
+			*new_range = *range;
+			range->chain = new_range;
+			addr = __physmem_alloc_range(size, align, 0, physmem_alloc_pos,
+						     ranges_left, &ranges_left, true);
+		}
+		range->end = addr + size;
+	}
+	range->start = addr;
+	physmem_alloc_pos = addr;
+	physmem_alloc_ranges = ranges_left;
+	return addr;
+}
+
+unsigned long get_physmem_alloc_pos(void)
+{
+	return physmem_alloc_pos;
+}
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c
index 11413f0baabc..64bd7ac3e35d 100644
--- a/arch/s390/boot/startup.c
+++ b/arch/s390/boot/startup.c
@@ -12,7 +12,7 @@
 #include <asm/diag.h>
 #include <asm/uv.h>
 #include <asm/abs_lowcore.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include "decompressor.h"
 #include "boot.h"
 #include "uv.h"
@@ -21,7 +21,6 @@ unsigned long __bootdata_preserved(__kaslr_offset);
 unsigned long __bootdata_preserved(__abs_lowcore);
 unsigned long __bootdata_preserved(__memcpy_real_area);
 pte_t *__bootdata_preserved(memcpy_real_ptep);
-unsigned long __bootdata(__amode31_base);
 unsigned long __bootdata_preserved(VMALLOC_START);
 unsigned long __bootdata_preserved(VMALLOC_END);
 struct page *__bootdata_preserved(vmemmap);
@@ -29,8 +28,6 @@ unsigned long __bootdata_preserved(vmemmap_size);
 unsigned long __bootdata_preserved(MODULES_VADDR);
 unsigned long __bootdata_preserved(MODULES_END);
 unsigned long __bootdata(ident_map_size);
-int __bootdata(is_full_image) = 1;
-struct initrd_data __bootdata(initrd_data);
 
 u64 __bootdata_preserved(stfle_fac_list[16]);
 u64 __bootdata_preserved(alt_stfle_fac_list[16]);
@@ -76,17 +73,20 @@ unsigned long mem_safe_offset(void)
 }
 #endif
 
-static unsigned long rescue_initrd(unsigned long safe_addr)
+static void rescue_initrd(unsigned long min, unsigned long max)
 {
+	unsigned long old_addr, addr, size;
+
 	if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD))
-		return safe_addr;
-	if (!initrd_data.start || !initrd_data.size)
-		return safe_addr;
-	if (initrd_data.start < safe_addr) {
-		memmove((void *)safe_addr, (void *)initrd_data.start, initrd_data.size);
-		initrd_data.start = safe_addr;
-	}
-	return initrd_data.start + initrd_data.size;
+		return;
+	if (!get_physmem_reserved(RR_INITRD, &addr, &size))
+		return;
+	if (addr >= min && addr + size <= max)
+		return;
+	old_addr = addr;
+	physmem_free(RR_INITRD);
+	addr = physmem_alloc_top_down(RR_INITRD, size, 0);
+	memmove((void *)addr, (void *)old_addr, size);
 }
 
 static void copy_bootdata(void)
@@ -140,7 +140,7 @@ static void handle_relocs(unsigned long offset)
  *
  * Consider the following factors:
  * 1. max_physmem_end - end of physical memory online or standby.
- *    Always <= end of the last online memory block (get_mem_detect_end()).
+ *    Always >= end of the last online memory range (get_physmem_online_end()).
  * 2. CONFIG_MAX_PHYSMEM_BITS - the maximum size of physical memory the
  *    kernel is able to support.
  * 3. "mem=" kernel command line option which limits physical memory usage.
@@ -160,10 +160,10 @@ static void setup_ident_map_size(unsigned long max_physmem_end)
 
 #ifdef CONFIG_CRASH_DUMP
 	if (oldmem_data.start) {
-		kaslr_enabled = 0;
+		__kaslr_enabled = 0;
 		ident_map_size = min(ident_map_size, oldmem_data.size);
 	} else if (ipl_block_valid && is_ipl_block_dump()) {
-		kaslr_enabled = 0;
+		__kaslr_enabled = 0;
 		if (!sclp_early_get_hsa_size(&hsa_size) && hsa_size)
 			ident_map_size = min(ident_map_size, hsa_size);
 	}
@@ -235,9 +235,9 @@ static unsigned long setup_kernel_memory_layout(void)
 /*
  * This function clears the BSS section of the decompressed Linux kernel and NOT the decompressor's.
  */
-static void clear_bss_section(void)
+static void clear_bss_section(unsigned long vmlinux_lma)
 {
-	memset((void *)vmlinux.default_lma + vmlinux.image_size, 0, vmlinux.bss_size);
+	memset((void *)vmlinux_lma + vmlinux.image_size, 0, vmlinux.bss_size);
 }
 
 /*
@@ -256,7 +256,6 @@ static void setup_vmalloc_size(void)
 
 static void offset_vmlinux_info(unsigned long offset)
 {
-	vmlinux.default_lma += offset;
 	*(unsigned long *)(&vmlinux.entry) += offset;
 	vmlinux.bootdata_off += offset;
 	vmlinux.bootdata_preserved_off += offset;
@@ -266,60 +265,83 @@ static void offset_vmlinux_info(unsigned long offset)
 	vmlinux.init_mm_off += offset;
 	vmlinux.swapper_pg_dir_off += offset;
 	vmlinux.invalid_pg_dir_off += offset;
-}
-
-static unsigned long reserve_amode31(unsigned long safe_addr)
-{
-	__amode31_base = PAGE_ALIGN(safe_addr);
-	return __amode31_base + vmlinux.amode31_size;
+#ifdef CONFIG_KASAN
+	vmlinux.kasan_early_shadow_page_off += offset;
+	vmlinux.kasan_early_shadow_pte_off += offset;
+	vmlinux.kasan_early_shadow_pmd_off += offset;
+	vmlinux.kasan_early_shadow_pud_off += offset;
+	vmlinux.kasan_early_shadow_p4d_off += offset;
+#endif
 }
 
 void startup_kernel(void)
 {
 	unsigned long max_physmem_end;
-	unsigned long random_lma;
-	unsigned long safe_addr;
+	unsigned long vmlinux_lma = 0;
+	unsigned long amode31_lma = 0;
 	unsigned long asce_limit;
+	unsigned long safe_addr;
 	void *img;
 	psw_t psw;
 
-	initrd_data.start = parmarea.initrd_start;
-	initrd_data.size = parmarea.initrd_size;
+	setup_lpp();
+	safe_addr = mem_safe_offset();
+	/*
+	 * reserve decompressor memory together with decompression heap, buffer and
+	 * memory which might be occupied by uncompressed kernel at default 1Mb
+	 * position (if KASLR is off or failed).
+	 */
+	physmem_reserve(RR_DECOMPRESSOR, 0, safe_addr);
+	if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && parmarea.initrd_size)
+		physmem_reserve(RR_INITRD, parmarea.initrd_start, parmarea.initrd_size);
 	oldmem_data.start = parmarea.oldmem_base;
 	oldmem_data.size = parmarea.oldmem_size;
 
-	setup_lpp();
 	store_ipl_parmblock();
-	safe_addr = mem_safe_offset();
-	safe_addr = reserve_amode31(safe_addr);
-	safe_addr = read_ipl_report(safe_addr);
+	read_ipl_report();
 	uv_query_info();
-	safe_addr = rescue_initrd(safe_addr);
 	sclp_early_read_info();
 	setup_boot_command_line();
 	parse_boot_command_line();
 	detect_facilities();
 	sanitize_prot_virt_host();
-	max_physmem_end = detect_memory(&safe_addr);
+	max_physmem_end = detect_max_physmem_end();
 	setup_ident_map_size(max_physmem_end);
 	setup_vmalloc_size();
 	asce_limit = setup_kernel_memory_layout();
-	mem_detect_set_usable_limit(ident_map_size);
-
-	if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_enabled) {
-		random_lma = get_random_base(safe_addr);
-		if (random_lma) {
-			__kaslr_offset = random_lma - vmlinux.default_lma;
-			img = (void *)vmlinux.default_lma;
+	/* got final ident_map_size, physmem allocations could be performed now */
+	physmem_set_usable_limit(ident_map_size);
+	detect_physmem_online_ranges(max_physmem_end);
+	save_ipl_cert_comp_list();
+	rescue_initrd(safe_addr, ident_map_size);
+
+	if (kaslr_enabled()) {
+		vmlinux_lma = randomize_within_range(vmlinux.image_size + vmlinux.bss_size,
+						     THREAD_SIZE, vmlinux.default_lma,
+						     ident_map_size);
+		if (vmlinux_lma) {
+			__kaslr_offset = vmlinux_lma - vmlinux.default_lma;
 			offset_vmlinux_info(__kaslr_offset);
 		}
 	}
+	vmlinux_lma = vmlinux_lma ?: vmlinux.default_lma;
+	physmem_reserve(RR_VMLINUX, vmlinux_lma, vmlinux.image_size + vmlinux.bss_size);
 
 	if (!IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED)) {
 		img = decompress_kernel();
-		memmove((void *)vmlinux.default_lma, img, vmlinux.image_size);
-	} else if (__kaslr_offset)
-		memcpy((void *)vmlinux.default_lma, img, vmlinux.image_size);
+		memmove((void *)vmlinux_lma, img, vmlinux.image_size);
+	} else if (__kaslr_offset) {
+		img = (void *)vmlinux.default_lma;
+		memmove((void *)vmlinux_lma, img, vmlinux.image_size);
+		memset(img, 0, vmlinux.image_size);
+	}
+
+	/* vmlinux decompression is done, shrink reserved low memory */
+	physmem_reserve(RR_DECOMPRESSOR, 0, (unsigned long)_decompressor_end);
+	if (kaslr_enabled())
+		amode31_lma = randomize_within_range(vmlinux.amode31_size, PAGE_SIZE, 0, SZ_2G);
+	amode31_lma = amode31_lma ?: vmlinux.default_lma - vmlinux.amode31_size;
+	physmem_reserve(RR_AMODE31, amode31_lma, vmlinux.amode31_size);
 
 	/*
 	 * The order of the following operations is important:
@@ -334,21 +356,16 @@ void startup_kernel(void)
 	 * - copy_bootdata() must follow setup_vmem() to propagate changes to
 	 *   bootdata made by setup_vmem()
 	 */
-	clear_bss_section();
+	clear_bss_section(vmlinux_lma);
 	handle_relocs(__kaslr_offset);
 	setup_vmem(asce_limit);
 	copy_bootdata();
 
-	if (__kaslr_offset) {
-		/*
-		 * Save KASLR offset for early dumps, before vmcore_info is set.
-		 * Mark as uneven to distinguish from real vmcore_info pointer.
-		 */
-		S390_lowcore.vmcore_info = __kaslr_offset | 0x1UL;
-		/* Clear non-relocated kernel */
-		if (IS_ENABLED(CONFIG_KERNEL_UNCOMPRESSED))
-			memset(img, 0, vmlinux.image_size);
-	}
+	/*
+	 * Save KASLR offset for early dumps, before vmcore_info is set.
+	 * Mark as uneven to distinguish from real vmcore_info pointer.
+	 */
+	S390_lowcore.vmcore_info = __kaslr_offset ? __kaslr_offset | 0x1UL : 0;
 
 	/*
 	 * Jump to the decompressed kernel entry point and switch DAT mode on.
diff --git a/arch/s390/boot/vmem.c b/arch/s390/boot/vmem.c
index 4d1d0d8e99cb..acb1f8b53105 100644
--- a/arch/s390/boot/vmem.c
+++ b/arch/s390/boot/vmem.c
@@ -1,81 +1,217 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <linux/sched/task.h>
 #include <linux/pgtable.h>
+#include <linux/kasan.h>
 #include <asm/pgalloc.h>
 #include <asm/facility.h>
 #include <asm/sections.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/maccess.h>
 #include <asm/abs_lowcore.h>
 #include "decompressor.h"
 #include "boot.h"
 
+unsigned long __bootdata_preserved(s390_invalid_asce);
+
+#ifdef CONFIG_PROC_FS
+atomic_long_t __bootdata_preserved(direct_pages_count[PG_DIRECT_MAP_MAX]);
+#endif
+
 #define init_mm			(*(struct mm_struct *)vmlinux.init_mm_off)
 #define swapper_pg_dir		vmlinux.swapper_pg_dir_off
 #define invalid_pg_dir		vmlinux.invalid_pg_dir_off
 
-/*
- * Mimic virt_to_kpte() in lack of init_mm symbol. Skip pmd NULL check though.
- */
-static inline pte_t *__virt_to_kpte(unsigned long va)
-{
-	return pte_offset_kernel(pmd_offset(pud_offset(p4d_offset(pgd_offset_k(va), va), va), va), va);
-}
-
-unsigned long __bootdata_preserved(s390_invalid_asce);
-unsigned long __bootdata(pgalloc_pos);
-unsigned long __bootdata(pgalloc_end);
-unsigned long __bootdata(pgalloc_low);
-
 enum populate_mode {
 	POPULATE_NONE,
-	POPULATE_ONE2ONE,
+	POPULATE_DIRECT,
 	POPULATE_ABS_LOWCORE,
+#ifdef CONFIG_KASAN
+	POPULATE_KASAN_MAP_SHADOW,
+	POPULATE_KASAN_ZERO_SHADOW,
+	POPULATE_KASAN_SHALLOW
+#endif
 };
 
-static void boot_check_oom(void)
+static void pgtable_populate(unsigned long addr, unsigned long end, enum populate_mode mode);
+
+#ifdef CONFIG_KASAN
+
+#define kasan_early_shadow_page	vmlinux.kasan_early_shadow_page_off
+#define kasan_early_shadow_pte	((pte_t *)vmlinux.kasan_early_shadow_pte_off)
+#define kasan_early_shadow_pmd	((pmd_t *)vmlinux.kasan_early_shadow_pmd_off)
+#define kasan_early_shadow_pud	((pud_t *)vmlinux.kasan_early_shadow_pud_off)
+#define kasan_early_shadow_p4d	((p4d_t *)vmlinux.kasan_early_shadow_p4d_off)
+#define __sha(x)		((unsigned long)kasan_mem_to_shadow((void *)x))
+
+static pte_t pte_z;
+
+static void kasan_populate_shadow(void)
+{
+	pmd_t pmd_z = __pmd(__pa(kasan_early_shadow_pte) | _SEGMENT_ENTRY);
+	pud_t pud_z = __pud(__pa(kasan_early_shadow_pmd) | _REGION3_ENTRY);
+	p4d_t p4d_z = __p4d(__pa(kasan_early_shadow_pud) | _REGION2_ENTRY);
+	unsigned long untracked_end;
+	unsigned long start, end;
+	int i;
+
+	pte_z = __pte(__pa(kasan_early_shadow_page) | pgprot_val(PAGE_KERNEL_RO));
+	if (!machine.has_nx)
+		pte_z = clear_pte_bit(pte_z, __pgprot(_PAGE_NOEXEC));
+	crst_table_init((unsigned long *)kasan_early_shadow_p4d, p4d_val(p4d_z));
+	crst_table_init((unsigned long *)kasan_early_shadow_pud, pud_val(pud_z));
+	crst_table_init((unsigned long *)kasan_early_shadow_pmd, pmd_val(pmd_z));
+	memset64((u64 *)kasan_early_shadow_pte, pte_val(pte_z), PTRS_PER_PTE);
+
+	/*
+	 * Current memory layout:
+	 * +- 0 -------------+	       +- shadow start -+
+	 * |1:1 ident mapping|	      /|1/8 of ident map|
+	 * |		     |	     / |		|
+	 * +-end of ident map+	    /  +----------------+
+	 * | ... gap ...     |	   /   |    kasan	|
+	 * |		     |	  /    |  zero page	|
+	 * +- vmalloc area  -+	 /     |   mapping	|
+	 * | vmalloc_size    |	/      | (untracked)	|
+	 * +- modules vaddr -+ /       +----------------+
+	 * | 2Gb	     |/        |    unmapped	| allocated per module
+	 * +- shadow start  -+	       +----------------+
+	 * | 1/8 addr space  |	       | zero pg mapping| (untracked)
+	 * +- shadow end ----+---------+- shadow end ---+
+	 *
+	 * Current memory layout (KASAN_VMALLOC):
+	 * +- 0 -------------+	       +- shadow start -+
+	 * |1:1 ident mapping|	      /|1/8 of ident map|
+	 * |		     |	     / |		|
+	 * +-end of ident map+	    /  +----------------+
+	 * | ... gap ...     |	   /   | kasan zero page| (untracked)
+	 * |		     |	  /    | mapping	|
+	 * +- vmalloc area  -+	 /     +----------------+
+	 * | vmalloc_size    |	/      |shallow populate|
+	 * +- modules vaddr -+ /       +----------------+
+	 * | 2Gb	     |/        |shallow populate|
+	 * +- shadow start  -+	       +----------------+
+	 * | 1/8 addr space  |	       | zero pg mapping| (untracked)
+	 * +- shadow end ----+---------+- shadow end ---+
+	 */
+
+	for_each_physmem_usable_range(i, &start, &end)
+		pgtable_populate(__sha(start), __sha(end), POPULATE_KASAN_MAP_SHADOW);
+	if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
+		untracked_end = VMALLOC_START;
+		/* shallowly populate kasan shadow for vmalloc and modules */
+		pgtable_populate(__sha(VMALLOC_START), __sha(MODULES_END), POPULATE_KASAN_SHALLOW);
+	} else {
+		untracked_end = MODULES_VADDR;
+	}
+	/* populate kasan shadow for untracked memory */
+	pgtable_populate(__sha(ident_map_size), __sha(untracked_end), POPULATE_KASAN_ZERO_SHADOW);
+	pgtable_populate(__sha(MODULES_END), __sha(_REGION1_SIZE), POPULATE_KASAN_ZERO_SHADOW);
+}
+
+static bool kasan_pgd_populate_zero_shadow(pgd_t *pgd, unsigned long addr,
+					   unsigned long end, enum populate_mode mode)
 {
-	if (pgalloc_pos < pgalloc_low)
-		error("out of memory on boot\n");
+	if (mode == POPULATE_KASAN_ZERO_SHADOW &&
+	    IS_ALIGNED(addr, PGDIR_SIZE) && end - addr >= PGDIR_SIZE) {
+		pgd_populate(&init_mm, pgd, kasan_early_shadow_p4d);
+		return true;
+	}
+	return false;
 }
 
-static void pgtable_populate_init(void)
+static bool kasan_p4d_populate_zero_shadow(p4d_t *p4d, unsigned long addr,
+					   unsigned long end, enum populate_mode mode)
 {
-	unsigned long initrd_end;
-	unsigned long kernel_end;
-
-	kernel_end = vmlinux.default_lma + vmlinux.image_size + vmlinux.bss_size;
-	pgalloc_low = round_up(kernel_end, PAGE_SIZE);
-	if (IS_ENABLED(CONFIG_BLK_DEV_INITRD)) {
-		initrd_end =  round_up(initrd_data.start + initrd_data.size, _SEGMENT_SIZE);
-		pgalloc_low = max(pgalloc_low, initrd_end);
+	if (mode == POPULATE_KASAN_ZERO_SHADOW &&
+	    IS_ALIGNED(addr, P4D_SIZE) && end - addr >= P4D_SIZE) {
+		p4d_populate(&init_mm, p4d, kasan_early_shadow_pud);
+		return true;
 	}
+	return false;
+}
 
-	pgalloc_end = round_down(get_mem_detect_end(), PAGE_SIZE);
-	pgalloc_pos = pgalloc_end;
+static bool kasan_pud_populate_zero_shadow(pud_t *pud, unsigned long addr,
+					   unsigned long end, enum populate_mode mode)
+{
+	if (mode == POPULATE_KASAN_ZERO_SHADOW &&
+	    IS_ALIGNED(addr, PUD_SIZE) && end - addr >= PUD_SIZE) {
+		pud_populate(&init_mm, pud, kasan_early_shadow_pmd);
+		return true;
+	}
+	return false;
+}
 
-	boot_check_oom();
+static bool kasan_pmd_populate_zero_shadow(pmd_t *pmd, unsigned long addr,
+					   unsigned long end, enum populate_mode mode)
+{
+	if (mode == POPULATE_KASAN_ZERO_SHADOW &&
+	    IS_ALIGNED(addr, PMD_SIZE) && end - addr >= PMD_SIZE) {
+		pmd_populate(&init_mm, pmd, kasan_early_shadow_pte);
+		return true;
+	}
+	return false;
 }
 
-static void *boot_alloc_pages(unsigned int order)
+static bool kasan_pte_populate_zero_shadow(pte_t *pte, enum populate_mode mode)
 {
-	unsigned long size = PAGE_SIZE << order;
+	pte_t entry;
 
-	pgalloc_pos -= size;
-	pgalloc_pos = round_down(pgalloc_pos, size);
+	if (mode == POPULATE_KASAN_ZERO_SHADOW) {
+		set_pte(pte, pte_z);
+		return true;
+	}
+	return false;
+}
+#else
 
-	boot_check_oom();
+static inline void kasan_populate_shadow(void) {}
 
-	return (void *)pgalloc_pos;
+static inline bool kasan_pgd_populate_zero_shadow(pgd_t *pgd, unsigned long addr,
+						  unsigned long end, enum populate_mode mode)
+{
+	return false;
+}
+
+static inline bool kasan_p4d_populate_zero_shadow(p4d_t *p4d, unsigned long addr,
+						  unsigned long end, enum populate_mode mode)
+{
+	return false;
+}
+
+static inline bool kasan_pud_populate_zero_shadow(pud_t *pud, unsigned long addr,
+						  unsigned long end, enum populate_mode mode)
+{
+	return false;
+}
+
+static inline bool kasan_pmd_populate_zero_shadow(pmd_t *pmd, unsigned long addr,
+						  unsigned long end, enum populate_mode mode)
+{
+	return false;
+}
+
+static bool kasan_pte_populate_zero_shadow(pte_t *pte, enum populate_mode mode)
+{
+	return false;
+}
+
+#endif
+
+/*
+ * Mimic virt_to_kpte() in lack of init_mm symbol. Skip pmd NULL check though.
+ */
+static inline pte_t *__virt_to_kpte(unsigned long va)
+{
+	return pte_offset_kernel(pmd_offset(pud_offset(p4d_offset(pgd_offset_k(va), va), va), va), va);
 }
 
 static void *boot_crst_alloc(unsigned long val)
 {
+	unsigned long size = PAGE_SIZE << CRST_ALLOC_ORDER;
 	unsigned long *table;
 
-	table = boot_alloc_pages(CRST_ALLOC_ORDER);
-	if (table)
-		crst_table_init(table, val);
+	table = (unsigned long *)physmem_alloc_top_down(RR_VMEM, size, size);
+	crst_table_init(table, val);
 	return table;
 }
 
@@ -84,28 +220,37 @@ static pte_t *boot_pte_alloc(void)
 	static void *pte_leftover;
 	pte_t *pte;
 
-	BUILD_BUG_ON(_PAGE_TABLE_SIZE * 2 != PAGE_SIZE);
-
+	/*
+	 * handling pte_leftovers this way helps to avoid memory fragmentation
+	 * during POPULATE_KASAN_MAP_SHADOW when EDAT is off
+	 */
 	if (!pte_leftover) {
-		pte_leftover = boot_alloc_pages(0);
+		pte_leftover = (void *)physmem_alloc_top_down(RR_VMEM, PAGE_SIZE, PAGE_SIZE);
 		pte = pte_leftover + _PAGE_TABLE_SIZE;
 	} else {
 		pte = pte_leftover;
 		pte_leftover = NULL;
 	}
+
 	memset64((u64 *)pte, _PAGE_INVALID, PTRS_PER_PTE);
 	return pte;
 }
 
-static unsigned long _pa(unsigned long addr, enum populate_mode mode)
+static unsigned long _pa(unsigned long addr, unsigned long size, enum populate_mode mode)
 {
 	switch (mode) {
 	case POPULATE_NONE:
 		return -1;
-	case POPULATE_ONE2ONE:
+	case POPULATE_DIRECT:
 		return addr;
 	case POPULATE_ABS_LOWCORE:
 		return __abs_lowcore_pa(addr);
+#ifdef CONFIG_KASAN
+	case POPULATE_KASAN_MAP_SHADOW:
+		addr = physmem_alloc_top_down(RR_VMEM, size, size);
+		memset((void *)addr, 0, size);
+		return addr;
+#endif
 	default:
 		return -1;
 	}
@@ -126,23 +271,28 @@ static bool can_large_pmd(pmd_t *pm_dir, unsigned long addr, unsigned long end)
 static void pgtable_pte_populate(pmd_t *pmd, unsigned long addr, unsigned long end,
 				 enum populate_mode mode)
 {
-	unsigned long next;
+	unsigned long pages = 0;
 	pte_t *pte, entry;
 
 	pte = pte_offset_kernel(pmd, addr);
 	for (; addr < end; addr += PAGE_SIZE, pte++) {
 		if (pte_none(*pte)) {
-			entry = __pte(_pa(addr, mode));
+			if (kasan_pte_populate_zero_shadow(pte, mode))
+				continue;
+			entry = __pte(_pa(addr, PAGE_SIZE, mode));
 			entry = set_pte_bit(entry, PAGE_KERNEL_EXEC);
 			set_pte(pte, entry);
+			pages++;
 		}
 	}
+	if (mode == POPULATE_DIRECT)
+		update_page_count(PG_DIRECT_MAP_4K, pages);
 }
 
 static void pgtable_pmd_populate(pud_t *pud, unsigned long addr, unsigned long end,
 				 enum populate_mode mode)
 {
-	unsigned long next;
+	unsigned long next, pages = 0;
 	pmd_t *pmd, entry;
 	pte_t *pte;
 
@@ -150,10 +300,13 @@ static void pgtable_pmd_populate(pud_t *pud, unsigned long addr, unsigned long e
 	for (; addr < end; addr = next, pmd++) {
 		next = pmd_addr_end(addr, end);
 		if (pmd_none(*pmd)) {
+			if (kasan_pmd_populate_zero_shadow(pmd, addr, next, mode))
+				continue;
 			if (can_large_pmd(pmd, addr, next)) {
-				entry = __pmd(_pa(addr, mode));
+				entry = __pmd(_pa(addr, _SEGMENT_SIZE, mode));
 				entry = set_pmd_bit(entry, SEGMENT_KERNEL_EXEC);
 				set_pmd(pmd, entry);
+				pages++;
 				continue;
 			}
 			pte = boot_pte_alloc();
@@ -163,12 +316,14 @@ static void pgtable_pmd_populate(pud_t *pud, unsigned long addr, unsigned long e
 		}
 		pgtable_pte_populate(pmd, addr, next, mode);
 	}
+	if (mode == POPULATE_DIRECT)
+		update_page_count(PG_DIRECT_MAP_1M, pages);
 }
 
 static void pgtable_pud_populate(p4d_t *p4d, unsigned long addr, unsigned long end,
 				 enum populate_mode mode)
 {
-	unsigned long next;
+	unsigned long next, pages = 0;
 	pud_t *pud, entry;
 	pmd_t *pmd;
 
@@ -176,10 +331,13 @@ static void pgtable_pud_populate(p4d_t *p4d, unsigned long addr, unsigned long e
 	for (; addr < end; addr = next, pud++) {
 		next = pud_addr_end(addr, end);
 		if (pud_none(*pud)) {
+			if (kasan_pud_populate_zero_shadow(pud, addr, next, mode))
+				continue;
 			if (can_large_pud(pud, addr, next)) {
-				entry = __pud(_pa(addr, mode));
+				entry = __pud(_pa(addr, _REGION3_SIZE, mode));
 				entry = set_pud_bit(entry, REGION3_KERNEL_EXEC);
 				set_pud(pud, entry);
+				pages++;
 				continue;
 			}
 			pmd = boot_crst_alloc(_SEGMENT_ENTRY_EMPTY);
@@ -189,6 +347,8 @@ static void pgtable_pud_populate(p4d_t *p4d, unsigned long addr, unsigned long e
 		}
 		pgtable_pmd_populate(pud, addr, next, mode);
 	}
+	if (mode == POPULATE_DIRECT)
+		update_page_count(PG_DIRECT_MAP_2G, pages);
 }
 
 static void pgtable_p4d_populate(pgd_t *pgd, unsigned long addr, unsigned long end,
@@ -202,6 +362,8 @@ static void pgtable_p4d_populate(pgd_t *pgd, unsigned long addr, unsigned long e
 	for (; addr < end; addr = next, p4d++) {
 		next = p4d_addr_end(addr, end);
 		if (p4d_none(*p4d)) {
+			if (kasan_p4d_populate_zero_shadow(p4d, addr, next, mode))
+				continue;
 			pud = boot_crst_alloc(_REGION3_ENTRY_EMPTY);
 			p4d_populate(&init_mm, p4d, pud);
 		}
@@ -219,9 +381,15 @@ static void pgtable_populate(unsigned long addr, unsigned long end, enum populat
 	for (; addr < end; addr = next, pgd++) {
 		next = pgd_addr_end(addr, end);
 		if (pgd_none(*pgd)) {
+			if (kasan_pgd_populate_zero_shadow(pgd, addr, next, mode))
+				continue;
 			p4d = boot_crst_alloc(_REGION2_ENTRY_EMPTY);
 			pgd_populate(&init_mm, pgd, p4d);
 		}
+#ifdef CONFIG_KASAN
+		if (mode == POPULATE_KASAN_SHALLOW)
+			continue;
+#endif
 		pgtable_p4d_populate(pgd, addr, next, mode);
 	}
 }
@@ -250,16 +418,17 @@ void setup_vmem(unsigned long asce_limit)
 	 * To prevent creation of a large page at address 0 first map
 	 * the lowcore and create the identity mapping only afterwards.
 	 */
-	pgtable_populate_init();
-	pgtable_populate(0, sizeof(struct lowcore), POPULATE_ONE2ONE);
-	for_each_mem_detect_usable_block(i, &start, &end)
-		pgtable_populate(start, end, POPULATE_ONE2ONE);
+	pgtable_populate(0, sizeof(struct lowcore), POPULATE_DIRECT);
+	for_each_physmem_usable_range(i, &start, &end)
+		pgtable_populate(start, end, POPULATE_DIRECT);
 	pgtable_populate(__abs_lowcore, __abs_lowcore + sizeof(struct lowcore),
 			 POPULATE_ABS_LOWCORE);
 	pgtable_populate(__memcpy_real_area, __memcpy_real_area + PAGE_SIZE,
 			 POPULATE_NONE);
 	memcpy_real_ptep = __virt_to_kpte(__memcpy_real_area);
 
+	kasan_populate_shadow();
+
 	S390_lowcore.kernel_asce = swapper_pg_dir | asce_bits;
 	S390_lowcore.user_asce = s390_invalid_asce;
 
@@ -269,10 +438,3 @@ void setup_vmem(unsigned long asce_limit)
 
 	init_mm.context.asce = S390_lowcore.kernel_asce;
 }
-
-unsigned long vmem_estimate_memory_needs(unsigned long online_mem_total)
-{
-	unsigned long pages = DIV_ROUND_UP(online_mem_total, PAGE_SIZE);
-
-	return DIV_ROUND_UP(pages, _PAGE_ENTRIES) * _PAGE_TABLE_SIZE * 2;
-}
diff --git a/arch/s390/boot/vmlinux.lds.S b/arch/s390/boot/vmlinux.lds.S
index fa9d33b01b85..389df0e0d9e5 100644
--- a/arch/s390/boot/vmlinux.lds.S
+++ b/arch/s390/boot/vmlinux.lds.S
@@ -93,6 +93,8 @@ SECTIONS
 		_decompressor_syms_end = .;
 	}
 
+	_decompressor_end = .;
+
 #ifdef CONFIG_KERNEL_UNCOMPRESSED
 	. = 0x100000;
 #else
diff --git a/arch/s390/crypto/chacha-s390.S b/arch/s390/crypto/chacha-s390.S
index 9b033622191c..37cb63f25b17 100644
--- a/arch/s390/crypto/chacha-s390.S
+++ b/arch/s390/crypto/chacha-s390.S
@@ -13,27 +13,28 @@
 #define SP	%r15
 #define FRAME	(16 * 8 + 4 * 8)
 
-.data
-.align	32
-
-.Lsigma:
-.long	0x61707865,0x3320646e,0x79622d32,0x6b206574	# endian-neutral
-.long	1,0,0,0
-.long	2,0,0,0
-.long	3,0,0,0
-.long	0x03020100,0x07060504,0x0b0a0908,0x0f0e0d0c	# byte swap
-
-.long	0,1,2,3
-.long	0x61707865,0x61707865,0x61707865,0x61707865	# smashed sigma
-.long	0x3320646e,0x3320646e,0x3320646e,0x3320646e
-.long	0x79622d32,0x79622d32,0x79622d32,0x79622d32
-.long	0x6b206574,0x6b206574,0x6b206574,0x6b206574
+	.data
+	.balign	32
 
-.previous
+SYM_DATA_START_LOCAL(sigma)
+	.long	0x61707865,0x3320646e,0x79622d32,0x6b206574	# endian-neutral
+	.long	1,0,0,0
+	.long	2,0,0,0
+	.long	3,0,0,0
+	.long	0x03020100,0x07060504,0x0b0a0908,0x0f0e0d0c	# byte swap
+
+	.long	0,1,2,3
+	.long	0x61707865,0x61707865,0x61707865,0x61707865	# smashed sigma
+	.long	0x3320646e,0x3320646e,0x3320646e,0x3320646e
+	.long	0x79622d32,0x79622d32,0x79622d32,0x79622d32
+	.long	0x6b206574,0x6b206574,0x6b206574,0x6b206574
+SYM_DATA_END(sigma)
+
+	.previous
 
 	GEN_BR_THUNK %r14
 
-.text
+	.text
 
 #############################################################################
 # void chacha20_vx_4x(u8 *out, counst u8 *inp, size_t len,
@@ -78,10 +79,10 @@
 #define XT2		%v29
 #define XT3		%v30
 
-ENTRY(chacha20_vx_4x)
+SYM_FUNC_START(chacha20_vx_4x)
 	stmg	%r6,%r7,6*8(SP)
 
-	larl	%r7,.Lsigma
+	larl	%r7,sigma
 	lhi	%r0,10
 	lhi	%r1,0
 
@@ -403,7 +404,7 @@ ENTRY(chacha20_vx_4x)
 
 	lmg	%r6,%r7,6*8(SP)
 	BR_EX	%r14
-ENDPROC(chacha20_vx_4x)
+SYM_FUNC_END(chacha20_vx_4x)
 
 #undef	OUT
 #undef	INP
@@ -471,7 +472,7 @@ ENDPROC(chacha20_vx_4x)
 #define T2		%v29
 #define T3		%v30
 
-ENTRY(chacha20_vx)
+SYM_FUNC_START(chacha20_vx)
 	clgfi	LEN,256
 	jle	chacha20_vx_4x
 	stmg	%r6,%r7,6*8(SP)
@@ -481,7 +482,7 @@ ENTRY(chacha20_vx)
 	la	SP,0(%r1,SP)
 	stg	%r0,0(SP)		# back-chain
 
-	larl	%r7,.Lsigma
+	larl	%r7,sigma
 	lhi	%r0,10
 
 	VLM	K1,K2,0,KEY,0		# load key
@@ -902,6 +903,6 @@ ENTRY(chacha20_vx)
 	lmg	%r6,%r7,FRAME+6*8(SP)
 	la	SP,FRAME(SP)
 	BR_EX	%r14
-ENDPROC(chacha20_vx)
+SYM_FUNC_END(chacha20_vx)
 
 .previous
diff --git a/arch/s390/crypto/crc32be-vx.S b/arch/s390/crypto/crc32be-vx.S
index 6b3d1009c392..6ea17628ea10 100644
--- a/arch/s390/crypto/crc32be-vx.S
+++ b/arch/s390/crypto/crc32be-vx.S
@@ -24,8 +24,8 @@
 #define CONST_RU_POLY		%v13
 #define CONST_CRC_POLY		%v14
 
-.data
-.align 8
+	.data
+	.balign	8
 
 /*
  * The CRC-32 constant block contains reduction constants to fold and
@@ -58,19 +58,20 @@
  *	P'(x) = 0xEDB88320
  */
 
-.Lconstants_CRC_32_BE:
+SYM_DATA_START_LOCAL(constants_CRC_32_BE)
 	.quad		0x08833794c, 0x0e6228b11	# R1, R2
 	.quad		0x0c5b9cd4c, 0x0e8a45605	# R3, R4
 	.quad		0x0f200aa66, 1 << 32		# R5, x32
 	.quad		0x0490d678d, 1			# R6, 1
 	.quad		0x104d101df, 0			# u
 	.quad		0x104C11DB7, 0			# P(x)
+SYM_DATA_END(constants_CRC_32_BE)
 
-.previous
+	.previous
 
 	GEN_BR_THUNK %r14
 
-.text
+	.text
 /*
  * The CRC-32 function(s) use these calling conventions:
  *
@@ -90,9 +91,9 @@
  *
  *	V9..V14: CRC-32 constants.
  */
-ENTRY(crc32_be_vgfm_16)
+SYM_FUNC_START(crc32_be_vgfm_16)
 	/* Load CRC-32 constants */
-	larl	%r5,.Lconstants_CRC_32_BE
+	larl	%r5,constants_CRC_32_BE
 	VLM	CONST_R1R2,CONST_CRC_POLY,0,%r5
 
 	/* Load the initial CRC value into the leftmost word of V0. */
@@ -207,6 +208,6 @@ ENTRY(crc32_be_vgfm_16)
 .Ldone:
 	VLGVF	%r2,%v2,3
 	BR_EX	%r14
-ENDPROC(crc32_be_vgfm_16)
+SYM_FUNC_END(crc32_be_vgfm_16)
 
 .previous
diff --git a/arch/s390/crypto/crc32le-vx.S b/arch/s390/crypto/crc32le-vx.S
index 71caf0f4ec08..5a819ae09a0b 100644
--- a/arch/s390/crypto/crc32le-vx.S
+++ b/arch/s390/crypto/crc32le-vx.S
@@ -25,8 +25,8 @@
 #define CONST_RU_POLY		%v13
 #define CONST_CRC_POLY		%v14
 
-.data
-.align 8
+	.data
+	.balign	8
 
 /*
  * The CRC-32 constant block contains reduction constants to fold and
@@ -59,27 +59,29 @@
  *	P'(x) = 0x82F63B78
  */
 
-.Lconstants_CRC_32_LE:
+SYM_DATA_START_LOCAL(constants_CRC_32_LE)
 	.octa		0x0F0E0D0C0B0A09080706050403020100	# BE->LE mask
 	.quad		0x1c6e41596, 0x154442bd4		# R2, R1
 	.quad		0x0ccaa009e, 0x1751997d0		# R4, R3
 	.octa		0x163cd6124				# R5
 	.octa		0x1F7011641				# u'
 	.octa		0x1DB710641				# P'(x) << 1
+SYM_DATA_END(constants_CRC_32_LE)
 
-.Lconstants_CRC_32C_LE:
+SYM_DATA_START_LOCAL(constants_CRC_32C_LE)
 	.octa		0x0F0E0D0C0B0A09080706050403020100	# BE->LE mask
 	.quad		0x09e4addf8, 0x740eef02			# R2, R1
 	.quad		0x14cd00bd6, 0xf20c0dfe			# R4, R3
 	.octa		0x0dd45aab8				# R5
 	.octa		0x0dea713f1				# u'
 	.octa		0x105ec76f0				# P'(x) << 1
+SYM_DATA_END(constants_CRC_32C_LE)
 
-.previous
+	.previous
 
 	GEN_BR_THUNK %r14
 
-.text
+	.text
 
 /*
  * The CRC-32 functions use these calling conventions:
@@ -102,17 +104,17 @@
  *	V10..V14: CRC-32 constants.
  */
 
-ENTRY(crc32_le_vgfm_16)
-	larl	%r5,.Lconstants_CRC_32_LE
+SYM_FUNC_START(crc32_le_vgfm_16)
+	larl	%r5,constants_CRC_32_LE
 	j	crc32_le_vgfm_generic
-ENDPROC(crc32_le_vgfm_16)
+SYM_FUNC_END(crc32_le_vgfm_16)
 
-ENTRY(crc32c_le_vgfm_16)
-	larl	%r5,.Lconstants_CRC_32C_LE
+SYM_FUNC_START(crc32c_le_vgfm_16)
+	larl	%r5,constants_CRC_32C_LE
 	j	crc32_le_vgfm_generic
-ENDPROC(crc32c_le_vgfm_16)
+SYM_FUNC_END(crc32c_le_vgfm_16)
 
-ENTRY(crc32_le_vgfm_generic)
+SYM_FUNC_START(crc32_le_vgfm_generic)
 	/* Load CRC-32 constants */
 	VLM	CONST_PERM_LE2BE,CONST_CRC_POLY,0,%r5
 
@@ -268,6 +270,6 @@ ENTRY(crc32_le_vgfm_generic)
 .Ldone:
 	VLGVF	%r2,%v2,2
 	BR_EX	%r14
-ENDPROC(crc32_le_vgfm_generic)
+SYM_FUNC_END(crc32_le_vgfm_generic)
 
 .previous
diff --git a/arch/s390/include/asm/ap.h b/arch/s390/include/asm/ap.h
index c699f251a464..d5d967166bac 100644
--- a/arch/s390/include/asm/ap.h
+++ b/arch/s390/include/asm/ap.h
@@ -43,10 +43,11 @@ struct ap_queue_status {
 	unsigned int queue_empty	: 1;
 	unsigned int replies_waiting	: 1;
 	unsigned int queue_full		: 1;
-	unsigned int _pad1		: 4;
+	unsigned int			: 3;
+	unsigned int async		: 1;
 	unsigned int irq_enabled	: 1;
 	unsigned int response_code	: 8;
-	unsigned int _pad2		: 16;
+	unsigned int			: 16;
 };
 
 /*
@@ -86,6 +87,42 @@ static inline bool ap_instructions_available(void)
 	return reg1 != 0;
 }
 
+/* TAPQ register GR2 response struct */
+struct ap_tapq_gr2 {
+	union {
+		unsigned long value;
+		struct {
+			unsigned int fac    : 32; /* facility bits */
+			unsigned int apinfo : 32; /* ap type, ... */
+		};
+		struct {
+			unsigned int s	   :  1; /* APSC */
+			unsigned int m	   :  1; /* AP4KM */
+			unsigned int c	   :  1; /* AP4KC */
+			unsigned int mode  :  3;
+			unsigned int n	   :  1; /* APXA */
+			unsigned int	   :  1;
+			unsigned int class :  8;
+			unsigned int bs	   :  2; /* SE bind/assoc */
+			unsigned int	   : 14;
+			unsigned int at	   :  8; /* ap type */
+			unsigned int nd	   :  8; /* nr of domains */
+			unsigned int	   :  4;
+			unsigned int ml	   :  4; /* apxl ml */
+			unsigned int	   :  4;
+			unsigned int qd	   :  4; /* queue depth */
+		};
+	};
+};
+
+/*
+ * Convenience defines to be used with the bs field from struct ap_tapq_gr2
+ */
+#define AP_BS_Q_USABLE		      0
+#define AP_BS_Q_USABLE_NO_SECURE_KEY  1
+#define AP_BS_Q_AVAIL_FOR_BINDING     2
+#define AP_BS_Q_UNUSABLE	      3
+
 /**
  * ap_tapq(): Test adjunct processor queue.
  * @qid: The AP queue number
@@ -93,7 +130,7 @@ static inline bool ap_instructions_available(void)
  *
  * Returns AP queue status structure.
  */
-static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)
+static inline struct ap_queue_status ap_tapq(ap_qid_t qid, struct ap_tapq_gr2 *info)
 {
 	union ap_queue_status_reg reg1;
 	unsigned long reg2;
@@ -108,7 +145,7 @@ static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)
 		: [qid] "d" (qid)
 		: "cc", "0", "1", "2");
 	if (info)
-		*info = reg2;
+		info->value = reg2;
 	return reg1.status;
 }
 
@@ -116,13 +153,12 @@ static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)
  * ap_test_queue(): Test adjunct processor queue.
  * @qid: The AP queue number
  * @tbit: Test facilities bit
- * @info: Pointer to queue descriptor
+ * @info: Ptr to tapq gr2 struct
  *
  * Returns AP queue status structure.
  */
-static inline struct ap_queue_status ap_test_queue(ap_qid_t qid,
-						   int tbit,
-						   unsigned long *info)
+static inline struct ap_queue_status ap_test_queue(ap_qid_t qid, int tbit,
+						   struct ap_tapq_gr2 *info)
 {
 	if (tbit)
 		qid |= 1UL << 23; /* set T bit*/
@@ -132,14 +168,18 @@ static inline struct ap_queue_status ap_test_queue(ap_qid_t qid,
 /**
  * ap_pqap_rapq(): Reset adjunct processor queue.
  * @qid: The AP queue number
+ * @fbit: if != 0 set F bit
  *
  * Returns AP queue status structure.
  */
-static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
+static inline struct ap_queue_status ap_rapq(ap_qid_t qid, int fbit)
 {
 	unsigned long reg0 = qid | (1UL << 24);  /* fc 1UL is RAPQ */
 	union ap_queue_status_reg reg1;
 
+	if (fbit)
+		reg0 |= 1UL << 22;
+
 	asm volatile(
 		"	lgr	0,%[reg0]\n"		/* qid arg into gr0 */
 		"	.insn	rre,0xb2af0000,0,0\n"	/* PQAP(RAPQ) */
@@ -153,14 +193,18 @@ static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
 /**
  * ap_pqap_zapq(): Reset and zeroize adjunct processor queue.
  * @qid: The AP queue number
+ * @fbit: if != 0 set F bit
  *
  * Returns AP queue status structure.
  */
-static inline struct ap_queue_status ap_zapq(ap_qid_t qid)
+static inline struct ap_queue_status ap_zapq(ap_qid_t qid, int fbit)
 {
 	unsigned long reg0 = qid | (2UL << 24);  /* fc 2UL is ZAPQ */
 	union ap_queue_status_reg reg1;
 
+	if (fbit)
+		reg0 |= 1UL << 22;
+
 	asm volatile(
 		"	lgr	0,%[reg0]\n"		/* qid arg into gr0 */
 		"	.insn	rre,0xb2af0000,0,0\n"	/* PQAP(ZAPQ) */
@@ -180,15 +224,16 @@ struct ap_config_info {
 	unsigned int apxa	 : 1;	/* N bit */
 	unsigned int qact	 : 1;	/* C bit */
 	unsigned int rc8a	 : 1;	/* R bit */
-	unsigned char _reserved1 : 4;
-	unsigned char _reserved2[3];
-	unsigned char Na;		/* max # of APs - 1 */
-	unsigned char Nd;		/* max # of Domains - 1 */
-	unsigned char _reserved3[10];
+	unsigned int		 : 4;
+	unsigned int apsb	 : 1;	/* B bit */
+	unsigned int		 : 23;
+	unsigned char na;		/* max # of APs - 1 */
+	unsigned char nd;		/* max # of Domains - 1 */
+	unsigned char _reserved0[10];
 	unsigned int apm[8];		/* AP ID mask */
 	unsigned int aqm[8];		/* AP (usage) queue mask */
 	unsigned int adm[8];		/* AP (control) domain mask */
-	unsigned char _reserved4[16];
+	unsigned char _reserved1[16];
 } __aligned(8);
 
 /**
@@ -318,6 +363,59 @@ static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
 	return reg1.status;
 }
 
+/*
+ * ap_bapq(): SE bind AP queue.
+ * @qid: The AP queue number
+ *
+ * Returns AP queue status structure.
+ *
+ * Invoking this function in a non-SE environment
+ * may case a specification exception.
+ */
+static inline struct ap_queue_status ap_bapq(ap_qid_t qid)
+{
+	unsigned long reg0 = qid | (7UL << 24);  /* fc 7 is BAPQ */
+	union ap_queue_status_reg reg1;
+
+	asm volatile(
+		"	lgr	0,%[reg0]\n"		/* qid arg into gr0 */
+		"	.insn	rre,0xb2af0000,0,0\n"	/* PQAP(BAPQ) */
+		"	lgr	%[reg1],1\n"		/* gr1 (status) into reg1 */
+		: [reg1] "=&d" (reg1.value)
+		: [reg0] "d" (reg0)
+		: "cc", "0", "1");
+
+	return reg1.status;
+}
+
+/*
+ * ap_aapq(): SE associate AP queue.
+ * @qid: The AP queue number
+ * @sec_idx: The secret index
+ *
+ * Returns AP queue status structure.
+ *
+ * Invoking this function in a non-SE environment
+ * may case a specification exception.
+ */
+static inline struct ap_queue_status ap_aapq(ap_qid_t qid, unsigned int sec_idx)
+{
+	unsigned long reg0 = qid | (8UL << 24);  /* fc 8 is AAPQ */
+	unsigned long reg2 = sec_idx;
+	union ap_queue_status_reg reg1;
+
+	asm volatile(
+		"	lgr	0,%[reg0]\n"		/* qid arg into gr0 */
+		"	lgr	2,%[reg2]\n"		/* secret index into gr2 */
+		"	.insn	rre,0xb2af0000,0,0\n"	/* PQAP(AAPQ) */
+		"	lgr	%[reg1],1\n"		/* gr1 (status) into reg1 */
+		: [reg1] "=&d" (reg1.value)
+		: [reg0] "d" (reg0), [reg2] "d" (reg2)
+		: "cc", "0", "1", "2");
+
+	return reg1.status;
+}
+
 /**
  * ap_nqap(): Send message to adjunct processor queue.
  * @qid: The AP queue number
@@ -359,10 +457,11 @@ static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
  * ap_dqap(): Receive message from adjunct processor queue.
  * @qid: The AP queue number
  * @psmid: Pointer to program supplied message identifier
- * @msg: The message text
- * @length: The message length
- * @reslength: Resitual length on return
- * @resgr0: input: gr0 value (only used if != 0), output: resitual gr0 content
+ * @msg: Pointer to message buffer
+ * @msglen: Message buffer size
+ * @length: Pointer to length of actually written bytes
+ * @reslength: Residual length on return
+ * @resgr0: input: gr0 value (only used if != 0), output: residual gr0 content
  *
  * Returns AP queue status structure.
  * Condition code 1 on DQAP means the receive has taken place
@@ -386,8 +485,9 @@ static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
  * *resgr0 is to be used instead of qid to further process this entry.
  */
 static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
-					     unsigned long long *psmid,
-					     void *msg, size_t length,
+					     unsigned long *psmid,
+					     void *msg, size_t msglen,
+					     size_t *length,
 					     size_t *reslength,
 					     unsigned long *resgr0)
 {
@@ -399,7 +499,7 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
 	rp1.even = 0UL;
 	rp1.odd  = 0UL;
 	rp2.even = (unsigned long)msg;
-	rp2.odd  = (unsigned long)length;
+	rp2.odd  = (unsigned long)msglen;
 
 	asm volatile(
 		"	lgr	0,%[reg0]\n"   /* qid param into gr0 */
@@ -429,11 +529,15 @@ static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
 		if (resgr0)
 			*resgr0 = reg0;
 	} else {
-		*psmid = (((unsigned long long)rp1.even) << 32) + rp1.odd;
+		*psmid = (rp1.even << 32) + rp1.odd;
 		if (resgr0)
 			*resgr0 = 0;
 	}
 
+	/* update *length with the nr of bytes stored into the msg buffer */
+	if (length)
+		*length = msglen - rp2.odd;
+
 	return reg1.status;
 }
 
diff --git a/arch/s390/include/asm/checksum.h b/arch/s390/include/asm/checksum.h
index d977a3a2f619..69837eec2ff5 100644
--- a/arch/s390/include/asm/checksum.h
+++ b/arch/s390/include/asm/checksum.h
@@ -12,13 +12,7 @@
 #ifndef _S390_CHECKSUM_H
 #define _S390_CHECKSUM_H
 
-#ifdef CONFIG_GENERIC_CSUM
-
-#include <asm-generic/checksum.h>
-
-#else /* CONFIG_GENERIC_CSUM */
-
-#include <linux/uaccess.h>
+#include <linux/kasan-checks.h>
 #include <linux/in6.h>
 
 /*
@@ -40,6 +34,7 @@ static inline __wsum csum_partial(const void *buff, int len, __wsum sum)
 		.odd = (unsigned long) len,
 	};
 
+	kasan_check_read(buff, len);
 	asm volatile(
 		"0:	cksm	%[sum],%[rp]\n"
 		"	jo	0b\n"
@@ -135,5 +130,4 @@ static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
 	return csum_fold((__force __wsum)(sum >> 32));
 }
 
-#endif /* CONFIG_GENERIC_CSUM */
 #endif /* _S390_CHECKSUM_H */
diff --git a/arch/s390/include/asm/diag.h b/arch/s390/include/asm/diag.h
index 674a939f16ee..902e0330dd91 100644
--- a/arch/s390/include/asm/diag.h
+++ b/arch/s390/include/asm/diag.h
@@ -90,7 +90,7 @@ struct diag8c {
 	u8 num_partitions;
 	u16 width;
 	u16 height;
-	u8 data[0];
+	u8 data[];
 } __packed __aligned(4);
 
 extern int diag8c(struct diag8c *out, struct ccw_dev_id *devno);
diff --git a/arch/s390/include/asm/entry-common.h b/arch/s390/include/asm/entry-common.h
index 000de2b1e67a..fdd319a622b0 100644
--- a/arch/s390/include/asm/entry-common.h
+++ b/arch/s390/include/asm/entry-common.h
@@ -60,9 +60,4 @@ static inline void arch_exit_to_user_mode_prepare(struct pt_regs *regs,
 
 #define arch_exit_to_user_mode_prepare arch_exit_to_user_mode_prepare
 
-static inline bool on_thread_stack(void)
-{
-	return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1));
-}
-
 #endif
diff --git a/arch/s390/include/asm/fcx.h b/arch/s390/include/asm/fcx.h
index b8a028a36173..29784b4b44f6 100644
--- a/arch/s390/include/asm/fcx.h
+++ b/arch/s390/include/asm/fcx.h
@@ -286,7 +286,7 @@ struct tccb_tcat {
  */
 struct tccb {
 	struct tccb_tcah tcah;
-	u8 tca[0];
+	u8 tca[];
 } __attribute__ ((packed, aligned(8)));
 
 struct tcw *tcw_get_intrg(struct tcw *tcw);
diff --git a/arch/s390/include/asm/kasan.h b/arch/s390/include/asm/kasan.h
index e5cfc81d5b61..0cffead0f2f2 100644
--- a/arch/s390/include/asm/kasan.h
+++ b/arch/s390/include/asm/kasan.h
@@ -2,7 +2,7 @@
 #ifndef __ASM_KASAN_H
 #define __ASM_KASAN_H
 
-#include <asm/pgtable.h>
+#include <linux/const.h>
 
 #ifdef CONFIG_KASAN
 
@@ -13,35 +13,6 @@
 #define KASAN_SHADOW_START	KASAN_SHADOW_OFFSET
 #define KASAN_SHADOW_END	(KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
 
-extern void kasan_early_init(void);
-
-/*
- * Estimate kasan memory requirements, which it will reserve
- * at the very end of available physical memory. To estimate
- * that, we take into account that kasan would require
- * 1/8 of available physical memory (for shadow memory) +
- * creating page tables for the shadow memory region.
- * To keep page tables estimates simple take the double of
- * combined ptes size.
- *
- * physmem parameter has to be already adjusted if not entire physical memory
- * would be used (e.g. due to effect of "mem=" option).
- */
-static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem)
-{
-	unsigned long kasan_needs;
-	unsigned long pages;
-	/* for shadow memory */
-	kasan_needs = round_up(physmem / 8, PAGE_SIZE);
-	/* for paging structures */
-	pages = DIV_ROUND_UP(kasan_needs, PAGE_SIZE);
-	kasan_needs += DIV_ROUND_UP(pages, _PAGE_ENTRIES) * _PAGE_TABLE_SIZE * 2;
-
-	return kasan_needs;
-}
-#else
-static inline void kasan_early_init(void) { }
-static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem) { return 0; }
 #endif
 
 #endif
diff --git a/arch/s390/include/asm/linkage.h b/arch/s390/include/asm/linkage.h
index c76777b15fec..df3fb7d8227b 100644
--- a/arch/s390/include/asm/linkage.h
+++ b/arch/s390/include/asm/linkage.h
@@ -4,7 +4,7 @@
 
 #include <linux/stringify.h>
 
-#define __ALIGN .align 16, 0x07
+#define __ALIGN .balign CONFIG_FUNCTION_ALIGNMENT, 0x07
 #define __ALIGN_STR __stringify(__ALIGN)
 
 #endif
diff --git a/arch/s390/include/asm/mem_detect.h b/arch/s390/include/asm/mem_detect.h
deleted file mode 100644
index f9e7354036d2..000000000000
--- a/arch/s390/include/asm/mem_detect.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_S390_MEM_DETECT_H
-#define _ASM_S390_MEM_DETECT_H
-
-#include <linux/types.h>
-
-enum mem_info_source {
-	MEM_DETECT_NONE = 0,
-	MEM_DETECT_SCLP_STOR_INFO,
-	MEM_DETECT_DIAG260,
-	MEM_DETECT_SCLP_READ_INFO,
-	MEM_DETECT_BIN_SEARCH
-};
-
-struct mem_detect_block {
-	u64 start;
-	u64 end;
-};
-
-/*
- * Storage element id is defined as 1 byte (up to 256 storage elements).
- * In practise only storage element id 0 and 1 are used).
- * According to architecture one storage element could have as much as
- * 1020 subincrements. 255 mem_detect_blocks are embedded in mem_detect_info.
- * If more mem_detect_blocks are required, a block of memory from already
- * known mem_detect_block is taken (entries_extended points to it).
- */
-#define MEM_INLINED_ENTRIES 255 /* (PAGE_SIZE - 16) / 16 */
-
-struct mem_detect_info {
-	u32 count;
-	u8 info_source;
-	unsigned long usable;
-	struct mem_detect_block entries[MEM_INLINED_ENTRIES];
-	struct mem_detect_block *entries_extended;
-};
-extern struct mem_detect_info mem_detect;
-
-void add_mem_detect_block(u64 start, u64 end);
-
-static inline int __get_mem_detect_block(u32 n, unsigned long *start,
-					 unsigned long *end, bool respect_usable_limit)
-{
-	if (n >= mem_detect.count) {
-		*start = 0;
-		*end = 0;
-		return -1;
-	}
-
-	if (n < MEM_INLINED_ENTRIES) {
-		*start = (unsigned long)mem_detect.entries[n].start;
-		*end = (unsigned long)mem_detect.entries[n].end;
-	} else {
-		*start = (unsigned long)mem_detect.entries_extended[n - MEM_INLINED_ENTRIES].start;
-		*end = (unsigned long)mem_detect.entries_extended[n - MEM_INLINED_ENTRIES].end;
-	}
-
-	if (respect_usable_limit && mem_detect.usable) {
-		if (*start >= mem_detect.usable)
-			return -1;
-		if (*end > mem_detect.usable)
-			*end = mem_detect.usable;
-	}
-	return 0;
-}
-
-/**
- * for_each_mem_detect_usable_block - early online memory range iterator
- * @i: an integer used as loop variable
- * @p_start: ptr to unsigned long for start address of the range
- * @p_end: ptr to unsigned long for end address of the range
- *
- * Walks over detected online memory ranges below usable limit.
- */
-#define for_each_mem_detect_usable_block(i, p_start, p_end)		\
-	for (i = 0; !__get_mem_detect_block(i, p_start, p_end, true); i++)
-
-/* Walks over all detected online memory ranges disregarding usable limit. */
-#define for_each_mem_detect_block(i, p_start, p_end)		\
-	for (i = 0; !__get_mem_detect_block(i, p_start, p_end, false); i++)
-
-static inline unsigned long get_mem_detect_usable_total(void)
-{
-	unsigned long start, end, total = 0;
-	int i;
-
-	for_each_mem_detect_usable_block(i, &start, &end)
-		total += end - start;
-
-	return total;
-}
-
-static inline void get_mem_detect_reserved(unsigned long *start,
-					   unsigned long *size)
-{
-	*start = (unsigned long)mem_detect.entries_extended;
-	if (mem_detect.count > MEM_INLINED_ENTRIES)
-		*size = (mem_detect.count - MEM_INLINED_ENTRIES) * sizeof(struct mem_detect_block);
-	else
-		*size = 0;
-}
-
-static inline unsigned long get_mem_detect_end(void)
-{
-	unsigned long start;
-	unsigned long end;
-
-	if (mem_detect.usable)
-		return mem_detect.usable;
-	if (mem_detect.count) {
-		__get_mem_detect_block(mem_detect.count - 1, &start, &end, false);
-		return end;
-	}
-	return 0;
-}
-
-#endif
diff --git a/arch/s390/include/asm/nospec-insn.h b/arch/s390/include/asm/nospec-insn.h
index 7e9e99523e95..7a946c42ad13 100644
--- a/arch/s390/include/asm/nospec-insn.h
+++ b/arch/s390/include/asm/nospec-insn.h
@@ -2,6 +2,7 @@
 #ifndef _ASM_S390_NOSPEC_ASM_H
 #define _ASM_S390_NOSPEC_ASM_H
 
+#include <linux/linkage.h>
 #include <asm/dwarf.h>
 
 #ifdef __ASSEMBLY__
@@ -16,7 +17,7 @@
 	.macro __THUNK_PROLOG_NAME name
 #ifdef CONFIG_EXPOLINE_EXTERN
 	.pushsection .text,"ax",@progbits
-	.align 16,0x07
+	__ALIGN
 #else
 	.pushsection .text.\name,"axG",@progbits,\name,comdat
 #endif
diff --git a/arch/s390/include/asm/perf_event.h b/arch/s390/include/asm/perf_event.h
index b9da71632827..9917e2717b2b 100644
--- a/arch/s390/include/asm/perf_event.h
+++ b/arch/s390/include/asm/perf_event.h
@@ -60,7 +60,6 @@ struct perf_sf_sde_regs {
 #define PERF_CPUM_SF_DIAG_MODE		0x0002	  /* Diagnostic-sampling flag */
 #define PERF_CPUM_SF_MODE_MASK		(PERF_CPUM_SF_BASIC_MODE| \
 					 PERF_CPUM_SF_DIAG_MODE)
-#define PERF_CPUM_SF_FULL_BLOCKS	0x0004	  /* Process full SDBs only */
 #define PERF_CPUM_SF_FREQ_MODE		0x0008	  /* Sampling with frequency */
 
 #define REG_NONE		0
@@ -71,7 +70,6 @@ struct perf_sf_sde_regs {
 #define SAMPL_RATE(hwc)		((hwc)->event_base)
 #define SAMPL_FLAGS(hwc)	((hwc)->config_base)
 #define SAMPL_DIAG_MODE(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_DIAG_MODE)
-#define SDB_FULL_BLOCKS(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FULL_BLOCKS)
 #define SAMPLE_FREQ_MODE(hwc)	(SAMPL_FLAGS(hwc) & PERF_CPUM_SF_FREQ_MODE)
 
 #define perf_arch_fetch_caller_regs(regs, __ip) do {			\
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index c1f6b46ec555..6822a11c2c8a 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -34,7 +34,7 @@ enum {
 	PG_DIRECT_MAP_MAX
 };
 
-extern atomic_long_t direct_pages_count[PG_DIRECT_MAP_MAX];
+extern atomic_long_t __bootdata_preserved(direct_pages_count[PG_DIRECT_MAP_MAX]);
 
 static inline void update_page_count(int level, long count)
 {
diff --git a/arch/s390/include/asm/physmem_info.h b/arch/s390/include/asm/physmem_info.h
new file mode 100644
index 000000000000..8e9c582592b3
--- /dev/null
+++ b/arch/s390/include/asm/physmem_info.h
@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_S390_MEM_DETECT_H
+#define _ASM_S390_MEM_DETECT_H
+
+#include <linux/types.h>
+
+enum physmem_info_source {
+	MEM_DETECT_NONE = 0,
+	MEM_DETECT_SCLP_STOR_INFO,
+	MEM_DETECT_DIAG260,
+	MEM_DETECT_SCLP_READ_INFO,
+	MEM_DETECT_BIN_SEARCH
+};
+
+struct physmem_range {
+	u64 start;
+	u64 end;
+};
+
+enum reserved_range_type {
+	RR_DECOMPRESSOR,
+	RR_INITRD,
+	RR_VMLINUX,
+	RR_AMODE31,
+	RR_IPLREPORT,
+	RR_CERT_COMP_LIST,
+	RR_MEM_DETECT_EXTENDED,
+	RR_VMEM,
+	RR_MAX
+};
+
+struct reserved_range {
+	unsigned long start;
+	unsigned long end;
+	struct reserved_range *chain;
+};
+
+/*
+ * Storage element id is defined as 1 byte (up to 256 storage elements).
+ * In practise only storage element id 0 and 1 are used).
+ * According to architecture one storage element could have as much as
+ * 1020 subincrements. 255 physmem_ranges are embedded in physmem_info.
+ * If more physmem_ranges are required, a block of memory from already
+ * known physmem_range is taken (online_extended points to it).
+ */
+#define MEM_INLINED_ENTRIES 255 /* (PAGE_SIZE - 16) / 16 */
+
+struct physmem_info {
+	u32 range_count;
+	u8 info_source;
+	unsigned long usable;
+	struct reserved_range reserved[RR_MAX];
+	struct physmem_range online[MEM_INLINED_ENTRIES];
+	struct physmem_range *online_extended;
+};
+
+extern struct physmem_info physmem_info;
+
+void add_physmem_online_range(u64 start, u64 end);
+
+static inline int __get_physmem_range(u32 n, unsigned long *start,
+				      unsigned long *end, bool respect_usable_limit)
+{
+	if (n >= physmem_info.range_count) {
+		*start = 0;
+		*end = 0;
+		return -1;
+	}
+
+	if (n < MEM_INLINED_ENTRIES) {
+		*start = (unsigned long)physmem_info.online[n].start;
+		*end = (unsigned long)physmem_info.online[n].end;
+	} else {
+		*start = (unsigned long)physmem_info.online_extended[n - MEM_INLINED_ENTRIES].start;
+		*end = (unsigned long)physmem_info.online_extended[n - MEM_INLINED_ENTRIES].end;
+	}
+
+	if (respect_usable_limit && physmem_info.usable) {
+		if (*start >= physmem_info.usable)
+			return -1;
+		if (*end > physmem_info.usable)
+			*end = physmem_info.usable;
+	}
+	return 0;
+}
+
+/**
+ * for_each_physmem_usable_range - early online memory range iterator
+ * @i: an integer used as loop variable
+ * @p_start: ptr to unsigned long for start address of the range
+ * @p_end: ptr to unsigned long for end address of the range
+ *
+ * Walks over detected online memory ranges below usable limit.
+ */
+#define for_each_physmem_usable_range(i, p_start, p_end)		\
+	for (i = 0; !__get_physmem_range(i, p_start, p_end, true); i++)
+
+/* Walks over all detected online memory ranges disregarding usable limit. */
+#define for_each_physmem_online_range(i, p_start, p_end)		\
+	for (i = 0; !__get_physmem_range(i, p_start, p_end, false); i++)
+
+static inline const char *get_physmem_info_source(void)
+{
+	switch (physmem_info.info_source) {
+	case MEM_DETECT_SCLP_STOR_INFO:
+		return "sclp storage info";
+	case MEM_DETECT_DIAG260:
+		return "diag260";
+	case MEM_DETECT_SCLP_READ_INFO:
+		return "sclp read info";
+	case MEM_DETECT_BIN_SEARCH:
+		return "binary search";
+	}
+	return "none";
+}
+
+#define RR_TYPE_NAME(t) case RR_ ## t: return #t
+static inline const char *get_rr_type_name(enum reserved_range_type t)
+{
+	switch (t) {
+	RR_TYPE_NAME(DECOMPRESSOR);
+	RR_TYPE_NAME(INITRD);
+	RR_TYPE_NAME(VMLINUX);
+	RR_TYPE_NAME(AMODE31);
+	RR_TYPE_NAME(IPLREPORT);
+	RR_TYPE_NAME(CERT_COMP_LIST);
+	RR_TYPE_NAME(MEM_DETECT_EXTENDED);
+	RR_TYPE_NAME(VMEM);
+	default:
+		return "UNKNOWN";
+	}
+}
+
+#define for_each_physmem_reserved_type_range(t, range, p_start, p_end)				\
+	for (range = &physmem_info.reserved[t], *p_start = range->start, *p_end = range->end;	\
+	     range && range->end; range = range->chain,						\
+	     *p_start = range ? range->start : 0, *p_end = range ? range->end : 0)
+
+static inline struct reserved_range *__physmem_reserved_next(enum reserved_range_type *t,
+							     struct reserved_range *range)
+{
+	if (!range) {
+		range = &physmem_info.reserved[*t];
+		if (range->end)
+			return range;
+	}
+	if (range->chain)
+		return range->chain;
+	while (++*t < RR_MAX) {
+		range = &physmem_info.reserved[*t];
+		if (range->end)
+			return range;
+	}
+	return NULL;
+}
+
+#define for_each_physmem_reserved_range(t, range, p_start, p_end)			\
+	for (t = 0, range = __physmem_reserved_next(&t, NULL),			\
+	    *p_start = range ? range->start : 0, *p_end = range ? range->end : 0;	\
+	     range; range = __physmem_reserved_next(&t, range),			\
+	    *p_start = range ? range->start : 0, *p_end = range ? range->end : 0)
+
+static inline unsigned long get_physmem_reserved(enum reserved_range_type type,
+						 unsigned long *addr, unsigned long *size)
+{
+	*addr = physmem_info.reserved[type].start;
+	*size = physmem_info.reserved[type].end - physmem_info.reserved[type].start;
+	return *size;
+}
+
+#endif
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index e98d9650764b..dc17896a001a 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -99,7 +99,6 @@ void cpu_detect_mhz_feature(void);
 
 extern const struct seq_operations cpuinfo_op;
 extern void execve_tail(void);
-extern void __bpon(void);
 unsigned long vdso_size(void);
 
 /*
@@ -119,6 +118,41 @@ unsigned long vdso_size(void);
 
 #define HAVE_ARCH_PICK_MMAP_LAYOUT
 
+#define __stackleak_poison __stackleak_poison
+static __always_inline void __stackleak_poison(unsigned long erase_low,
+					       unsigned long erase_high,
+					       unsigned long poison)
+{
+	unsigned long tmp, count;
+
+	count = erase_high - erase_low;
+	if (!count)
+		return;
+	asm volatile(
+		"	cghi	%[count],8\n"
+		"	je	2f\n"
+		"	aghi	%[count],-(8+1)\n"
+		"	srlg	%[tmp],%[count],8\n"
+		"	ltgr	%[tmp],%[tmp]\n"
+		"	jz	1f\n"
+		"0:	stg	%[poison],0(%[addr])\n"
+		"	mvc	8(256-8,%[addr]),0(%[addr])\n"
+		"	la	%[addr],256(%[addr])\n"
+		"	brctg	%[tmp],0b\n"
+		"1:	stg	%[poison],0(%[addr])\n"
+		"	larl	%[tmp],3f\n"
+		"	ex	%[count],0(%[tmp])\n"
+		"	j	4f\n"
+		"2:	stg	%[poison],0(%[addr])\n"
+		"	j	4f\n"
+		"3:	mvc	8(1,%[addr]),0(%[addr])\n"
+		"4:\n"
+		: [addr] "+&a" (erase_low), [count] "+&d" (count), [tmp] "=&a" (tmp)
+		: [poison] "d" (poison)
+		: "memory", "cc"
+		);
+}
+
 /*
  * Thread structure
  */
@@ -227,6 +261,13 @@ static __always_inline unsigned long __current_stack_pointer(void)
 	return sp;
 }
 
+static __always_inline bool on_thread_stack(void)
+{
+	unsigned long ksp = S390_lowcore.kernel_stack;
+
+	return !((ksp ^ current_stack_pointer) & ~(THREAD_SIZE - 1));
+}
+
 static __always_inline unsigned short stap(void)
 {
 	unsigned short cpu_address;
@@ -329,9 +370,6 @@ static __always_inline void __noreturn disabled_wait(void)
 
 #define ARCH_LOW_ADDRESS_LIMIT	0x7fffffffUL
 
-extern int s390_isolate_bp(void);
-extern int s390_isolate_bp_guest(void);
-
 static __always_inline bool regs_irqs_disabled(struct pt_regs *regs)
 {
 	return arch_irqs_disabled_flags(regs->psw.mask);
diff --git a/arch/s390/include/asm/set_memory.h b/arch/s390/include/asm/set_memory.h
index 950d87bd997a..7a3eefd7a242 100644
--- a/arch/s390/include/asm/set_memory.h
+++ b/arch/s390/include/asm/set_memory.h
@@ -6,11 +6,23 @@
 
 extern struct mutex cpa_mutex;
 
-#define SET_MEMORY_RO	1UL
-#define SET_MEMORY_RW	2UL
-#define SET_MEMORY_NX	4UL
-#define SET_MEMORY_X	8UL
-#define SET_MEMORY_4K  16UL
+enum {
+	_SET_MEMORY_RO_BIT,
+	_SET_MEMORY_RW_BIT,
+	_SET_MEMORY_NX_BIT,
+	_SET_MEMORY_X_BIT,
+	_SET_MEMORY_4K_BIT,
+	_SET_MEMORY_INV_BIT,
+	_SET_MEMORY_DEF_BIT,
+};
+
+#define SET_MEMORY_RO	BIT(_SET_MEMORY_RO_BIT)
+#define SET_MEMORY_RW	BIT(_SET_MEMORY_RW_BIT)
+#define SET_MEMORY_NX	BIT(_SET_MEMORY_NX_BIT)
+#define SET_MEMORY_X	BIT(_SET_MEMORY_X_BIT)
+#define SET_MEMORY_4K	BIT(_SET_MEMORY_4K_BIT)
+#define SET_MEMORY_INV	BIT(_SET_MEMORY_INV_BIT)
+#define SET_MEMORY_DEF	BIT(_SET_MEMORY_DEF_BIT)
 
 int __set_memory(unsigned long addr, int numpages, unsigned long flags);
 
@@ -34,9 +46,23 @@ static inline int set_memory_x(unsigned long addr, int numpages)
 	return __set_memory(addr, numpages, SET_MEMORY_X);
 }
 
+#define set_memory_rox set_memory_rox
+static inline int set_memory_rox(unsigned long addr, int numpages)
+{
+	return __set_memory(addr, numpages, SET_MEMORY_RO | SET_MEMORY_X);
+}
+
+static inline int set_memory_rwnx(unsigned long addr, int numpages)
+{
+	return __set_memory(addr, numpages, SET_MEMORY_RW | SET_MEMORY_NX);
+}
+
 static inline int set_memory_4k(unsigned long addr, int numpages)
 {
 	return __set_memory(addr, numpages, SET_MEMORY_4K);
 }
 
+int set_direct_map_invalid_noflush(struct page *page);
+int set_direct_map_default_noflush(struct page *page);
+
 #endif
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index 3a1f8825bc7d..f191255c60db 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -74,10 +74,6 @@ extern unsigned int zlib_dfltcc_support;
 
 extern int noexec_disabled;
 extern unsigned long ident_map_size;
-extern unsigned long pgalloc_pos;
-extern unsigned long pgalloc_end;
-extern unsigned long pgalloc_low;
-extern unsigned long __amode31_base;
 
 /* The Write Back bit position in the physaddr is given by the SLPC PCI */
 extern unsigned long mio_wb_bit_mask;
@@ -150,13 +146,13 @@ static inline unsigned long kaslr_offset(void)
 	return __kaslr_offset;
 }
 
-extern int is_full_image;
-
-struct initrd_data {
-	unsigned long start;
-	unsigned long size;
-};
-extern struct initrd_data initrd_data;
+extern int __kaslr_enabled;
+static inline int kaslr_enabled(void)
+{
+	if (IS_ENABLED(CONFIG_RANDOMIZE_BASE))
+		return __kaslr_enabled;
+	return 0;
+}
 
 struct oldmem_data {
 	unsigned long start;
@@ -164,7 +160,7 @@ struct oldmem_data {
 };
 extern struct oldmem_data oldmem_data;
 
-static inline u32 gen_lpswe(unsigned long addr)
+static __always_inline u32 gen_lpswe(unsigned long addr)
 {
 	BUILD_BUG_ON(addr > 0xfff);
 	return 0xb2b20000 | addr;
diff --git a/arch/s390/include/asm/stacktrace.h b/arch/s390/include/asm/stacktrace.h
index 1802be5abb5d..78f7b729b65f 100644
--- a/arch/s390/include/asm/stacktrace.h
+++ b/arch/s390/include/asm/stacktrace.h
@@ -189,17 +189,53 @@ static __always_inline unsigned long get_stack_pointer(struct task_struct *task,
 	(rettype)r2;							\
 })
 
-#define call_on_stack_noreturn(fn, stack)				\
+/*
+ * Use call_nodat() to call a function with DAT disabled.
+ * Proper sign and zero extension of function arguments is done.
+ * Usage:
+ *
+ * rc = call_nodat(nr, rettype, fn, t1, a1, t2, a2, ...)
+ *
+ * - nr specifies the number of function arguments of fn.
+ * - fn is the function to be called, where fn is a physical address.
+ * - rettype is the return type of fn.
+ * - t1, a1, ... are pairs, where t1 must match the type of the first
+ *   argument of fn, t2 the second, etc. a1 is the corresponding
+ *   first function argument (not name), etc.
+ *
+ * fn() is called with standard C function call ABI, with the exception
+ * that no useful stackframe or stackpointer is passed via register 15.
+ * Therefore the called function must not use r15 to access the stack.
+ */
+#define call_nodat(nr, rettype, fn, ...)				\
 ({									\
-	void (*__fn)(void) = fn;					\
+	rettype (*__fn)(CALL_PARM_##nr(__VA_ARGS__)) = (fn);		\
+	/* aligned since psw_leave must not cross page boundary */	\
+	psw_t __aligned(16) psw_leave;					\
+	psw_t psw_enter;						\
+	CALL_LARGS_##nr(__VA_ARGS__);					\
+	CALL_REGS_##nr;							\
 									\
+	CALL_TYPECHECK_##nr(__VA_ARGS__);				\
+	psw_enter.mask = PSW_KERNEL_BITS & ~PSW_MASK_DAT;		\
+	psw_enter.addr = (unsigned long)__fn;				\
 	asm volatile(							\
-		"	la	15,0(%[_stack])\n"			\
-		"	xc	%[_bc](8,15),%[_bc](15)\n"		\
-		"	brasl	14,%[_fn]\n"				\
-		::[_bc] "i" (offsetof(struct stack_frame, back_chain)),	\
-		  [_stack] "a" (stack), [_fn] "X" (__fn));		\
-	BUG();								\
+		"	epsw	0,1\n"					\
+		"	risbg	1,0,0,31,32\n"				\
+		"	larl	7,1f\n"					\
+		"	stg	1,%[psw_leave]\n"			\
+		"	stg	7,8+%[psw_leave]\n"			\
+		"	la	7,%[psw_leave]\n"			\
+		"	lra	7,0(7)\n"				\
+		"	larl	1,0f\n"					\
+		"	lra	14,0(1)\n"				\
+		"	lpswe	%[psw_enter]\n"				\
+		"0:	lpswe	0(7)\n"					\
+		"1:\n"							\
+		: CALL_FMT_##nr, [psw_leave] "=Q" (psw_leave)		\
+		: [psw_enter] "Q" (psw_enter)				\
+		: "7", CALL_CLOBBER_##nr);				\
+	(rettype)r2;							\
 })
 
 #endif /* _ASM_S390_STACKTRACE_H */
diff --git a/arch/s390/include/asm/string.h b/arch/s390/include/asm/string.h
index 3fae93ddb322..351685de53d2 100644
--- a/arch/s390/include/asm/string.h
+++ b/arch/s390/include/asm/string.h
@@ -55,18 +55,6 @@ char *strstr(const char *s1, const char *s2);
 
 #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
 
-extern void *__memcpy(void *dest, const void *src, size_t n);
-extern void *__memset(void *s, int c, size_t n);
-extern void *__memmove(void *dest, const void *src, size_t n);
-
-/*
- * For files that are not instrumented (e.g. mm/slub.c) we
- * should use not instrumented version of mem* functions.
- */
-
-#define memcpy(dst, src, len) __memcpy(dst, src, len)
-#define memmove(dst, src, len) __memmove(dst, src, len)
-#define memset(s, c, n) __memset(s, c, n)
 #define strlen(s) __strlen(s)
 
 #define __no_sanitize_prefix_strfunc(x) __##x
@@ -79,6 +67,9 @@ extern void *__memmove(void *dest, const void *src, size_t n);
 #define __no_sanitize_prefix_strfunc(x) x
 #endif /* defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__) */
 
+void *__memcpy(void *dest, const void *src, size_t n);
+void *__memset(void *s, int c, size_t n);
+void *__memmove(void *dest, const void *src, size_t n);
 void *__memset16(uint16_t *s, uint16_t v, size_t count);
 void *__memset32(uint32_t *s, uint32_t v, size_t count);
 void *__memset64(uint64_t *s, uint64_t v, size_t count);
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index b2ffcb4fe000..c7c97921ed8d 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -9,6 +9,9 @@
 #define _ASM_THREAD_INFO_H
 
 #include <linux/bits.h>
+#ifndef ASM_OFFSETS_C
+#include <asm/asm-offsets.h>
+#endif
 
 /*
  * General size of kernel stacks
@@ -21,13 +24,12 @@
 #define BOOT_STACK_SIZE (PAGE_SIZE << 2)
 #define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
 
+#define STACK_INIT_OFFSET (THREAD_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE)
+
 #ifndef __ASSEMBLY__
 #include <asm/lowcore.h>
 #include <asm/page.h>
 
-#define STACK_INIT_OFFSET \
-	(THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs))
-
 /*
  * low level task data that entry.S needs immediate access to
  * - this struct should fit entirely inside of one cache line
@@ -70,7 +72,6 @@ void arch_setup_new_exec(void);
 #define TIF_PATCH_PENDING	5	/* pending live patching update */
 #define TIF_PGSTE		6	/* New mm's will use 4K page tables */
 #define TIF_NOTIFY_SIGNAL	7	/* signal notifications exist */
-#define TIF_ISOLATE_BP		8	/* Run process with isolated BP */
 #define TIF_ISOLATE_BP_GUEST	9	/* Run KVM guests with isolated BP */
 #define TIF_PER_TRAP		10	/* Need to handle PER trap on exit to usermode */
 
@@ -94,7 +95,6 @@ void arch_setup_new_exec(void);
 #define _TIF_UPROBE		BIT(TIF_UPROBE)
 #define _TIF_GUARDED_STORAGE	BIT(TIF_GUARDED_STORAGE)
 #define _TIF_PATCH_PENDING	BIT(TIF_PATCH_PENDING)
-#define _TIF_ISOLATE_BP		BIT(TIF_ISOLATE_BP)
 #define _TIF_ISOLATE_BP_GUEST	BIT(TIF_ISOLATE_BP_GUEST)
 #define _TIF_PER_TRAP		BIT(TIF_PER_TRAP)
 
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c
index b376f0377a2c..a85e0c3e7027 100644
--- a/arch/s390/kernel/debug.c
+++ b/arch/s390/kernel/debug.c
@@ -60,7 +60,7 @@ typedef struct {
 	 * except of floats, and long long (32 bit)
 	 *
 	 */
-	long args[0];
+	long args[];
 } debug_sprintf_entry_t;
 
 /* internal function prototyes */
@@ -981,16 +981,6 @@ static struct ctl_table s390dbf_table[] = {
 	{ }
 };
 
-static struct ctl_table s390dbf_dir_table[] = {
-	{
-		.procname	= "s390dbf",
-		.maxlen		= 0,
-		.mode		= S_IRUGO | S_IXUGO,
-		.child		= s390dbf_table,
-	},
-	{ }
-};
-
 static struct ctl_table_header *s390dbf_sysctl_header;
 
 /**
@@ -1574,7 +1564,7 @@ out:
  */
 static int __init debug_init(void)
 {
-	s390dbf_sysctl_header = register_sysctl_table(s390dbf_dir_table);
+	s390dbf_sysctl_header = register_sysctl("s390dbf", s390dbf_table);
 	mutex_lock(&debug_mutex);
 	debug_debugfs_root_entry = debugfs_create_dir(DEBUG_DIR_ROOT, NULL);
 	initialized = 1;
diff --git a/arch/s390/kernel/dumpstack.c b/arch/s390/kernel/dumpstack.c
index 1e3233eb510a..d2012635b093 100644
--- a/arch/s390/kernel/dumpstack.c
+++ b/arch/s390/kernel/dumpstack.c
@@ -41,60 +41,50 @@ const char *stack_type_name(enum stack_type type)
 EXPORT_SYMBOL_GPL(stack_type_name);
 
 static inline bool in_stack(unsigned long sp, struct stack_info *info,
-			    enum stack_type type, unsigned long low,
-			    unsigned long high)
+			    enum stack_type type, unsigned long stack)
 {
-	if (sp < low || sp >= high)
+	if (sp < stack || sp >= stack + THREAD_SIZE)
 		return false;
 	info->type = type;
-	info->begin = low;
-	info->end = high;
+	info->begin = stack;
+	info->end = stack + THREAD_SIZE;
 	return true;
 }
 
 static bool in_task_stack(unsigned long sp, struct task_struct *task,
 			  struct stack_info *info)
 {
-	unsigned long stack;
+	unsigned long stack = (unsigned long)task_stack_page(task);
 
-	stack = (unsigned long) task_stack_page(task);
-	return in_stack(sp, info, STACK_TYPE_TASK, stack, stack + THREAD_SIZE);
+	return in_stack(sp, info, STACK_TYPE_TASK, stack);
 }
 
 static bool in_irq_stack(unsigned long sp, struct stack_info *info)
 {
-	unsigned long frame_size, top;
+	unsigned long stack = S390_lowcore.async_stack - STACK_INIT_OFFSET;
 
-	frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
-	top = S390_lowcore.async_stack + frame_size;
-	return in_stack(sp, info, STACK_TYPE_IRQ, top - THREAD_SIZE, top);
+	return in_stack(sp, info, STACK_TYPE_IRQ, stack);
 }
 
 static bool in_nodat_stack(unsigned long sp, struct stack_info *info)
 {
-	unsigned long frame_size, top;
+	unsigned long stack = S390_lowcore.nodat_stack - STACK_INIT_OFFSET;
 
-	frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
-	top = S390_lowcore.nodat_stack + frame_size;
-	return in_stack(sp, info, STACK_TYPE_NODAT, top - THREAD_SIZE, top);
+	return in_stack(sp, info, STACK_TYPE_NODAT, stack);
 }
 
 static bool in_mcck_stack(unsigned long sp, struct stack_info *info)
 {
-	unsigned long frame_size, top;
+	unsigned long stack = S390_lowcore.mcck_stack - STACK_INIT_OFFSET;
 
-	frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
-	top = S390_lowcore.mcck_stack + frame_size;
-	return in_stack(sp, info, STACK_TYPE_MCCK, top - THREAD_SIZE, top);
+	return in_stack(sp, info, STACK_TYPE_MCCK, stack);
 }
 
 static bool in_restart_stack(unsigned long sp, struct stack_info *info)
 {
-	unsigned long frame_size, top;
+	unsigned long stack = S390_lowcore.restart_stack - STACK_INIT_OFFSET;
 
-	frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
-	top = S390_lowcore.restart_stack + frame_size;
-	return in_stack(sp, info, STACK_TYPE_RESTART, top - THREAD_SIZE, top);
+	return in_stack(sp, info, STACK_TYPE_RESTART, stack);
 }
 
 int get_stack_info(unsigned long sp, struct task_struct *task,
@@ -152,7 +142,13 @@ void show_stack(struct task_struct *task, unsigned long *stack,
 static void show_last_breaking_event(struct pt_regs *regs)
 {
 	printk("Last Breaking-Event-Address:\n");
-	printk(" [<%016lx>] %pSR\n", regs->last_break, (void *)regs->last_break);
+	printk(" [<%016lx>] ", regs->last_break);
+	if (user_mode(regs)) {
+		print_vma_addr(KERN_CONT, regs->last_break);
+		pr_cont("\n");
+	} else {
+		pr_cont("%pSR\n", (void *)regs->last_break);
+	}
 }
 
 void show_registers(struct pt_regs *regs)
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index d26f02495636..2dd5976a55ac 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -34,8 +34,6 @@
 #include <asm/switch_to.h>
 #include "entry.h"
 
-int __bootdata(is_full_image);
-
 #define decompressor_handled_param(param)			\
 static int __init ignore_decompressor_param_##param(char *s)	\
 {								\
@@ -53,6 +51,14 @@ decompressor_handled_param(nokaslr);
 decompressor_handled_param(prot_virt);
 #endif
 
+static void __init kasan_early_init(void)
+{
+#ifdef CONFIG_KASAN
+	init_task.kasan_depth = 0;
+	sclp_early_printk("KernelAddressSanitizer initialized\n");
+#endif
+}
+
 static void __init reset_tod_clock(void)
 {
 	union tod_clock clk;
@@ -288,17 +294,6 @@ static void __init setup_boot_command_line(void)
 	strscpy(boot_command_line, early_command_line, COMMAND_LINE_SIZE);
 }
 
-static void __init check_image_bootable(void)
-{
-	if (is_full_image)
-		return;
-
-	sclp_early_printk("Linux kernel boot failure: An attempt to boot a vmlinux ELF image failed.\n");
-	sclp_early_printk("This image does not contain all parts necessary for starting up. Use\n");
-	sclp_early_printk("bzImage or arch/s390/boot/compressed/vmlinux instead.\n");
-	disabled_wait();
-}
-
 static void __init sort_amode31_extable(void)
 {
 	sort_extable(__start_amode31_ex_table, __stop_amode31_ex_table);
@@ -306,8 +301,8 @@ static void __init sort_amode31_extable(void)
 
 void __init startup_init(void)
 {
+	kasan_early_init();
 	reset_tod_clock();
-	check_image_bootable();
 	time_early_init();
 	init_kernel_storage_key();
 	lockdep_off();
diff --git a/arch/s390/kernel/earlypgm.S b/arch/s390/kernel/earlypgm.S
index f521c6da37b8..c634871f0d90 100644
--- a/arch/s390/kernel/earlypgm.S
+++ b/arch/s390/kernel/earlypgm.S
@@ -7,7 +7,7 @@
 #include <linux/linkage.h>
 #include <asm/asm-offsets.h>
 
-ENTRY(early_pgm_check_handler)
+SYM_CODE_START(early_pgm_check_handler)
 	stmg	%r8,%r15,__LC_SAVE_AREA_SYNC
 	aghi	%r15,-(STACK_FRAME_OVERHEAD+__PT_SIZE)
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)
@@ -20,4 +20,4 @@ ENTRY(early_pgm_check_handler)
 	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
 	lmg	%r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
 	lpswe	__LC_RETURN_PSW
-ENDPROC(early_pgm_check_handler)
+SYM_CODE_END(early_pgm_check_handler)
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 76a06f3d3671..e5b6c1369e8e 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -29,10 +29,6 @@
 #include <asm/export.h>
 #include <asm/nospec-insn.h>
 
-STACK_SHIFT = PAGE_SHIFT + THREAD_SIZE_ORDER
-STACK_SIZE  = 1 << STACK_SHIFT
-STACK_INIT = STACK_SIZE - STACK_FRAME_OVERHEAD - __PT_SIZE
-
 _LPP_OFFSET	= __LC_LPP
 
 	.macro STBEAR address
@@ -53,7 +49,7 @@ _LPP_OFFSET	= __LC_LPP
 
 	.macro	CHECK_STACK savearea
 #ifdef CONFIG_CHECK_STACK
-	tml	%r15,STACK_SIZE - CONFIG_STACK_GUARD
+	tml	%r15,THREAD_SIZE - CONFIG_STACK_GUARD
 	lghi	%r14,\savearea
 	jz	stack_overflow
 #endif
@@ -62,8 +58,8 @@ _LPP_OFFSET	= __LC_LPP
 	.macro	CHECK_VMAP_STACK savearea,oklabel
 #ifdef CONFIG_VMAP_STACK
 	lgr	%r14,%r15
-	nill	%r14,0x10000 - STACK_SIZE
-	oill	%r14,STACK_INIT
+	nill	%r14,0x10000 - THREAD_SIZE
+	oill	%r14,STACK_INIT_OFFSET
 	clg	%r14,__LC_KERNEL_STACK
 	je	\oklabel
 	clg	%r14,__LC_ASYNC_STACK
@@ -154,26 +150,26 @@ _LPP_OFFSET	= __LC_LPP
 	.endm
 #endif
 
+	.macro STACKLEAK_ERASE
+#ifdef CONFIG_GCC_PLUGIN_STACKLEAK
+	brasl	%r14,stackleak_erase_on_task_stack
+#endif
+	.endm
+
 	GEN_BR_THUNK %r14
 
 	.section .kprobes.text, "ax"
 .Ldummy:
 	/*
-	 * This nop exists only in order to avoid that __bpon starts at
-	 * the beginning of the kprobes text section. In that case we would
-	 * have several symbols at the same address. E.g. objdump would take
-	 * an arbitrary symbol name when disassembling this code.
-	 * With the added nop in between the __bpon symbol is unique
-	 * again.
+	 * The following nop exists only in order to avoid that the next
+	 * symbol starts at the beginning of the kprobes text section.
+	 * In that case there would be several symbols at the same address.
+	 * E.g. objdump would take an arbitrary symbol when disassembling
+	 * the code.
+	 * With the added nop in between this cannot happen.
 	 */
 	nop	0
 
-ENTRY(__bpon)
-	.globl __bpon
-	BPON
-	BR_EX	%r14
-ENDPROC(__bpon)
-
 /*
  * Scheduler resume function, called by switch_to
  *  gpr2 = (task_struct *) prev
@@ -181,11 +177,11 @@ ENDPROC(__bpon)
  * Returns:
  *  gpr2 = prev
  */
-ENTRY(__switch_to)
+SYM_FUNC_START(__switch_to)
 	stmg	%r6,%r15,__SF_GPRS(%r15)	# store gprs of prev task
 	lghi	%r4,__TASK_stack
 	lghi	%r1,__TASK_thread
-	llill	%r5,STACK_INIT
+	llill	%r5,STACK_INIT_OFFSET
 	stg	%r15,__THREAD_ksp(%r1,%r2)	# store kernel stack of prev
 	lg	%r15,0(%r4,%r3)			# start of kernel stack of next
 	agr	%r15,%r5			# end of kernel stack of next
@@ -197,7 +193,7 @@ ENTRY(__switch_to)
 	lmg	%r6,%r15,__SF_GPRS(%r15)	# load gprs of next task
 	ALTERNATIVE "nop", "lpp _LPP_OFFSET", 40
 	BR_EX	%r14
-ENDPROC(__switch_to)
+SYM_FUNC_END(__switch_to)
 
 #if IS_ENABLED(CONFIG_KVM)
 /*
@@ -206,7 +202,7 @@ ENDPROC(__switch_to)
  * %r3 pointer to sie control block virt
  * %r4 guest register save area
  */
-ENTRY(__sie64a)
+SYM_FUNC_START(__sie64a)
 	stmg	%r6,%r14,__SF_GPRS(%r15)	# save kernel registers
 	lg	%r12,__LC_CURRENT
 	stg	%r2,__SF_SIE_CONTROL_PHYS(%r15)	# save sie block physical..
@@ -227,7 +223,7 @@ ENTRY(__sie64a)
 	TSTMSK	__LC_CPU_FLAGS,_CIF_FPU
 	jo	.Lsie_skip			# exit if fp/vx regs changed
 	lg	%r14,__SF_SIE_CONTROL_PHYS(%r15)	# get sie block phys addr
-	BPEXIT	__SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+	BPEXIT	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 .Lsie_entry:
 	sie	0(%r14)
 # Let the next instruction be NOP to avoid triggering a machine check
@@ -235,7 +231,7 @@ ENTRY(__sie64a)
 	nopr	7
 .Lsie_leave:
 	BPOFF
-	BPENTER	__SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 .Lsie_skip:
 	lg	%r14,__SF_SIE_CONTROL(%r15)	# get control block pointer
 	ni	__SIE_PROG0C+3(%r14),0xfe	# no longer in SIE
@@ -252,8 +248,7 @@ ENTRY(__sie64a)
 	nopr	7
 .Lrewind_pad2:
 	nopr	7
-	.globl sie_exit
-sie_exit:
+SYM_INNER_LABEL(sie_exit, SYM_L_GLOBAL)
 	lg	%r14,__SF_SIE_SAVEAREA(%r15)	# load guest register save area
 	stmg	%r0,%r13,0(%r14)		# save guest gprs 0-13
 	xgr	%r0,%r0				# clear guest registers to
@@ -273,7 +268,7 @@ sie_exit:
 	EX_TABLE(.Lrewind_pad4,.Lsie_fault)
 	EX_TABLE(.Lrewind_pad2,.Lsie_fault)
 	EX_TABLE(sie_exit,.Lsie_fault)
-ENDPROC(__sie64a)
+SYM_FUNC_END(__sie64a)
 EXPORT_SYMBOL(__sie64a)
 EXPORT_SYMBOL(sie_exit)
 #endif
@@ -283,7 +278,7 @@ EXPORT_SYMBOL(sie_exit)
  * are entered with interrupts disabled.
  */
 
-ENTRY(system_call)
+SYM_CODE_START(system_call)
 	stpt	__LC_SYS_ENTER_TIMER
 	stmg	%r8,%r15,__LC_SAVE_AREA_SYNC
 	BPOFF
@@ -291,11 +286,9 @@ ENTRY(system_call)
 .Lsysc_per:
 	STBEAR	__LC_LAST_BREAK
 	lctlg	%c1,%c1,__LC_KERNEL_ASCE
-	lg	%r12,__LC_CURRENT
 	lg	%r15,__LC_KERNEL_STACK
 	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
 	stmg	%r0,%r7,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
-	BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
 	# clear user controlled register to prevent speculative use
 	xgr	%r0,%r0
 	xgr	%r1,%r1
@@ -312,39 +305,40 @@ ENTRY(system_call)
 	MBEAR	%r2
 	lgr	%r3,%r14
 	brasl	%r14,__do_syscall
+	STACKLEAK_ERASE
 	lctlg	%c1,%c1,__LC_USER_ASCE
 	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
-	BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	LBEAR	STACK_FRAME_OVERHEAD+__PT_LAST_BREAK(%r15)
 	lmg	%r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
 	stpt	__LC_EXIT_TIMER
 	LPSWEY	__LC_RETURN_PSW,__LC_RETURN_LPSWE
-ENDPROC(system_call)
+SYM_CODE_END(system_call)
 
 #
 # a new process exits the kernel with ret_from_fork
 #
-ENTRY(ret_from_fork)
+SYM_CODE_START(ret_from_fork)
 	lgr	%r3,%r11
 	brasl	%r14,__ret_from_fork
+	STACKLEAK_ERASE
 	lctlg	%c1,%c1,__LC_USER_ASCE
 	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
-	BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	LBEAR	STACK_FRAME_OVERHEAD+__PT_LAST_BREAK(%r15)
 	lmg	%r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
 	stpt	__LC_EXIT_TIMER
 	LPSWEY	__LC_RETURN_PSW,__LC_RETURN_LPSWE
-ENDPROC(ret_from_fork)
+SYM_CODE_END(ret_from_fork)
 
 /*
  * Program check handler routine
  */
 
-ENTRY(pgm_check_handler)
+SYM_CODE_START(pgm_check_handler)
 	stpt	__LC_SYS_ENTER_TIMER
 	BPOFF
 	stmg	%r8,%r15,__LC_SAVE_AREA_SYNC
-	lg	%r12,__LC_CURRENT
 	lghi	%r10,0
 	lmg	%r8,%r9,__LC_PGM_OLD_PSW
 	tmhh	%r8,0x0001		# coming from user space?
@@ -355,6 +349,7 @@ ENTRY(pgm_check_handler)
 #if IS_ENABLED(CONFIG_KVM)
 	# cleanup critical section for program checks in __sie64a
 	OUTSIDE	%r9,.Lsie_gmap,.Lsie_done,1f
+	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 	SIEEXIT
 	lghi	%r10,_PIF_GUEST_FAULT
 #endif
@@ -366,8 +361,7 @@ ENTRY(pgm_check_handler)
 	aghi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	# CHECK_VMAP_STACK branches to stack_overflow or 4f
 	CHECK_VMAP_STACK __LC_SAVE_AREA_SYNC,4f
-3:	BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
-	lg	%r15,__LC_KERNEL_STACK
+3:	lg	%r15,__LC_KERNEL_STACK
 4:	la	%r11,STACK_FRAME_OVERHEAD(%r15)
 	stg	%r10,__PT_FLAGS(%r11)
 	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
@@ -388,8 +382,9 @@ ENTRY(pgm_check_handler)
 	brasl	%r14,__do_pgm_check
 	tmhh	%r8,0x0001		# returning to user space?
 	jno	.Lpgm_exit_kernel
+	STACKLEAK_ERASE
 	lctlg	%c1,%c1,__LC_USER_ASCE
-	BPEXIT __TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	stpt	__LC_EXIT_TIMER
 .Lpgm_exit_kernel:
 	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
@@ -407,32 +402,30 @@ ENTRY(pgm_check_handler)
 	lghi	%r14,1
 	LBEAR	__LC_PGM_LAST_BREAK
 	LPSWEY	__LC_RETURN_PSW,__LC_RETURN_LPSWE # branch to .Lsysc_per
-ENDPROC(pgm_check_handler)
+SYM_CODE_END(pgm_check_handler)
 
 /*
  * Interrupt handler macro used for external and IO interrupts.
  */
 .macro INT_HANDLER name,lc_old_psw,handler
-ENTRY(\name)
+SYM_CODE_START(\name)
 	stckf	__LC_INT_CLOCK
 	stpt	__LC_SYS_ENTER_TIMER
 	STBEAR	__LC_LAST_BREAK
 	BPOFF
 	stmg	%r8,%r15,__LC_SAVE_AREA_ASYNC
-	lg	%r12,__LC_CURRENT
 	lmg	%r8,%r9,\lc_old_psw
 	tmhh	%r8,0x0001			# interrupting from user ?
 	jnz	1f
 #if IS_ENABLED(CONFIG_KVM)
 	OUTSIDE	%r9,.Lsie_gmap,.Lsie_done,0f
-	BPENTER	__SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 	SIEEXIT
 #endif
 0:	CHECK_STACK __LC_SAVE_AREA_ASYNC
 	aghi	%r15,-(STACK_FRAME_OVERHEAD + __PT_SIZE)
 	j	2f
-1:	BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
-	lctlg	%c1,%c1,__LC_KERNEL_ASCE
+1:	lctlg	%c1,%c1,__LC_KERNEL_ASCE
 	lg	%r15,__LC_KERNEL_STACK
 2:	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)
@@ -455,13 +448,14 @@ ENTRY(\name)
 	mvc	__LC_RETURN_PSW(16),__PT_PSW(%r11)
 	tmhh	%r8,0x0001		# returning to user ?
 	jno	2f
+	STACKLEAK_ERASE
 	lctlg	%c1,%c1,__LC_USER_ASCE
-	BPEXIT	__TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	stpt	__LC_EXIT_TIMER
 2:	LBEAR	__PT_LAST_BREAK(%r11)
 	lmg	%r0,%r15,__PT_R0(%r11)
 	LPSWEY	__LC_RETURN_PSW,__LC_RETURN_LPSWE
-ENDPROC(\name)
+SYM_CODE_END(\name)
 .endm
 
 INT_HANDLER ext_int_handler,__LC_EXT_OLD_PSW,do_ext_irq
@@ -470,7 +464,7 @@ INT_HANDLER io_int_handler,__LC_IO_OLD_PSW,do_io_irq
 /*
  * Load idle PSW.
  */
-ENTRY(psw_idle)
+SYM_FUNC_START(psw_idle)
 	stg	%r14,(__SF_GPRS+8*8)(%r15)
 	stg	%r3,__SF_EMPTY(%r15)
 	larl	%r1,psw_idle_exit
@@ -486,29 +480,26 @@ ENTRY(psw_idle)
 	stckf	__CLOCK_IDLE_ENTER(%r2)
 	stpt	__TIMER_IDLE_ENTER(%r2)
 	lpswe	__SF_EMPTY(%r15)
-.globl psw_idle_exit
-psw_idle_exit:
+SYM_INNER_LABEL(psw_idle_exit, SYM_L_GLOBAL)
 	BR_EX	%r14
-ENDPROC(psw_idle)
+SYM_FUNC_END(psw_idle)
 
 /*
  * Machine check handler routines
  */
-ENTRY(mcck_int_handler)
+SYM_CODE_START(mcck_int_handler)
 	stckf	__LC_MCCK_CLOCK
 	BPOFF
 	la	%r1,4095		# validate r1
 	spt	__LC_CPU_TIMER_SAVE_AREA-4095(%r1)	# validate cpu timer
 	LBEAR	__LC_LAST_BREAK_SAVE_AREA-4095(%r1)		# validate bear
-	lmg	%r0,%r15,__LC_GPREGS_SAVE_AREA-4095(%r1)# validate gprs
-	lg	%r12,__LC_CURRENT
+	lmg	%r0,%r15,__LC_GPREGS_SAVE_AREA		# validate gprs
 	lmg	%r8,%r9,__LC_MCK_OLD_PSW
 	TSTMSK	__LC_MCCK_CODE,MCCK_CODE_SYSTEM_DAMAGE
 	jo	.Lmcck_panic		# yes -> rest of mcck code invalid
 	TSTMSK	__LC_MCCK_CODE,MCCK_CODE_CR_VALID
 	jno	.Lmcck_panic		# control registers invalid -> panic
-	la	%r14,4095
-	lctlg	%c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r14) # validate ctl regs
+	lctlg	%c0,%c15,__LC_CREGS_SAVE_AREA		# validate ctl regs
 	ptlb
 	lghi	%r14,__LC_CPU_TIMER_SAVE_AREA
 	mvc	__LC_MCCK_ENTER_TIMER(8),0(%r14)
@@ -530,16 +521,13 @@ ENTRY(mcck_int_handler)
 	TSTMSK	__LC_MCCK_CODE,MCCK_CODE_PSW_IA_VALID
 	jno	.Lmcck_panic
 #if IS_ENABLED(CONFIG_KVM)
-	OUTSIDE	%r9,.Lsie_gmap,.Lsie_done,.Lmcck_stack
+	OUTSIDE	%r9,.Lsie_gmap,.Lsie_done,.Lmcck_user
 	OUTSIDE	%r9,.Lsie_entry,.Lsie_leave,4f
 	oi	__LC_CPU_FLAGS+7, _CIF_MCCK_GUEST
-4:	BPENTER	__SF_SIE_FLAGS(%r15),(_TIF_ISOLATE_BP|_TIF_ISOLATE_BP_GUEST)
+4:	BPENTER	__SF_SIE_FLAGS(%r15),_TIF_ISOLATE_BP_GUEST
 	SIEEXIT
-	j	.Lmcck_stack
 #endif
 .Lmcck_user:
-	BPENTER __TI_flags(%r12),_TIF_ISOLATE_BP
-.Lmcck_stack:
 	lg	%r15,__LC_MCCK_STACK
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)
 	stctg	%c1,%c1,__PT_CR1(%r11)
@@ -567,7 +555,7 @@ ENTRY(mcck_int_handler)
 	mvc	__LC_RETURN_MCCK_PSW(16),__PT_PSW(%r11) # move return PSW
 	tm	__LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
 	jno	0f
-	BPEXIT	__TI_flags(%r12),_TIF_ISOLATE_BP
+	BPON
 	stpt	__LC_EXIT_TIMER
 0:	ALTERNATIVE "nop", __stringify(lghi %r12,__LC_LAST_BREAK_SAVE_AREA),193
 	LBEAR	0(%r12)
@@ -583,10 +571,10 @@ ENTRY(mcck_int_handler)
 	 */
 	lhi	%r5,0
 	lhi	%r6,1
-	larl	%r7,.Lstop_lock
+	larl	%r7,stop_lock
 	cs	%r5,%r6,0(%r7)		# single CPU-stopper only
 	jnz	4f
-	larl	%r7,.Lthis_cpu
+	larl	%r7,this_cpu
 	stap	0(%r7)			# this CPU address
 	lh	%r4,0(%r7)
 	nilh	%r4,0
@@ -602,16 +590,15 @@ ENTRY(mcck_int_handler)
 3:	sigp	%r1,%r4,SIGP_STOP	# stop this CPU
 	brc	SIGP_CC_BUSY,3b
 4:	j	4b
-ENDPROC(mcck_int_handler)
+SYM_CODE_END(mcck_int_handler)
 
-ENTRY(restart_int_handler)
+SYM_CODE_START(restart_int_handler)
 	ALTERNATIVE "nop", "lpp _LPP_OFFSET", 40
 	stg	%r15,__LC_SAVE_AREA_RESTART
 	TSTMSK	__LC_RESTART_FLAGS,RESTART_FLAG_CTLREGS,4
 	jz	0f
-	la	%r15,4095
-	lctlg	%c0,%c15,__LC_CREGS_SAVE_AREA-4095(%r15)
-0:	larl	%r15,.Lstosm_tmp
+	lctlg	%c0,%c15,__LC_CREGS_SAVE_AREA
+0:	larl	%r15,stosm_tmp
 	stosm	0(%r15),0x04			# turn dat on, keep irqs off
 	lg	%r15,__LC_RESTART_STACK
 	xc	STACK_FRAME_OVERHEAD(__PT_SIZE,%r15),STACK_FRAME_OVERHEAD(%r15)
@@ -632,7 +619,7 @@ ENTRY(restart_int_handler)
 2:	sigp	%r4,%r3,SIGP_STOP		# sigp stop to current cpu
 	brc	2,2b
 3:	j	3b
-ENDPROC(restart_int_handler)
+SYM_CODE_END(restart_int_handler)
 
 	.section .kprobes.text, "ax"
 
@@ -642,7 +629,7 @@ ENDPROC(restart_int_handler)
  * No need to properly save the registers, we are going to panic anyway.
  * Setup a pt_regs so that show_trace can provide a good call trace.
  */
-ENTRY(stack_overflow)
+SYM_CODE_START(stack_overflow)
 	lg	%r15,__LC_NODAT_STACK	# change to panic stack
 	la	%r11,STACK_FRAME_OVERHEAD(%r15)
 	stmg	%r0,%r7,__PT_R0(%r11)
@@ -652,26 +639,27 @@ ENTRY(stack_overflow)
 	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
 	lgr	%r2,%r11		# pass pointer to pt_regs
 	jg	kernel_stack_overflow
-ENDPROC(stack_overflow)
+SYM_CODE_END(stack_overflow)
 #endif
 
 	.section .data, "aw"
-		.align	4
-.Lstop_lock:	.long	0
-.Lthis_cpu:	.short	0
-.Lstosm_tmp:	.byte	0
+	.balign	4
+SYM_DATA_LOCAL(stop_lock,	.long 0)
+SYM_DATA_LOCAL(this_cpu,	.short 0)
+SYM_DATA_LOCAL(stosm_tmp,	.byte 0)
+
 	.section .rodata, "a"
 #define SYSCALL(esame,emu)	.quad __s390x_ ## esame
-	.globl	sys_call_table
-sys_call_table:
+SYM_DATA_START(sys_call_table)
 #include "asm/syscall_table.h"
+SYM_DATA_END(sys_call_table)
 #undef SYSCALL
 
 #ifdef CONFIG_COMPAT
 
 #define SYSCALL(esame,emu)	.quad __s390_ ## emu
-	.globl	sys_call_table_emu
-sys_call_table_emu:
+SYM_DATA_START(sys_call_table_emu)
 #include "asm/syscall_table.h"
+SYM_DATA_END(sys_call_table_emu)
 #undef SYSCALL
 #endif
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 416b5a94353d..c46381ea04ec 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -49,26 +49,6 @@ struct ftrace_insn {
 	s32 disp;
 } __packed;
 
-asm(
-	"	.align 16\n"
-	"ftrace_shared_hotpatch_trampoline_br:\n"
-	"	lmg	%r0,%r1,2(%r1)\n"
-	"	br	%r1\n"
-	"ftrace_shared_hotpatch_trampoline_br_end:\n"
-);
-
-#ifdef CONFIG_EXPOLINE
-asm(
-	"	.align 16\n"
-	"ftrace_shared_hotpatch_trampoline_exrl:\n"
-	"	lmg	%r0,%r1,2(%r1)\n"
-	"	exrl	%r0,0f\n"
-	"	j	.\n"
-	"0:	br	%r1\n"
-	"ftrace_shared_hotpatch_trampoline_exrl_end:\n"
-);
-#endif /* CONFIG_EXPOLINE */
-
 #ifdef CONFIG_MODULES
 static char *ftrace_plt;
 #endif /* CONFIG_MODULES */
@@ -246,7 +226,7 @@ static int __init ftrace_plt_init(void)
 
 	start = ftrace_shared_hotpatch_trampoline(&end);
 	memcpy(ftrace_plt, start, end - start);
-	set_memory_ro((unsigned long)ftrace_plt, 1);
+	set_memory_rox((unsigned long)ftrace_plt, 1);
 	return 0;
 }
 device_initcall(ftrace_plt_init);
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 3b3bf8329e6c..df77ba102096 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -16,7 +16,7 @@
 #include <asm/ptrace.h>
 
 __HEAD
-ENTRY(startup_continue)
+SYM_CODE_START(startup_continue)
 	larl	%r1,tod_clock_base
 	mvc	0(16,%r1),__LC_BOOT_CLOCK
 #
@@ -24,19 +24,17 @@ ENTRY(startup_continue)
 #
 	larl	%r14,init_task
 	stg	%r14,__LC_CURRENT
-	larl	%r15,init_thread_union+THREAD_SIZE-STACK_FRAME_OVERHEAD-__PT_SIZE
+	larl	%r15,init_thread_union+STACK_INIT_OFFSET
+	stg	%r15,__LC_KERNEL_STACK
 	brasl	%r14,sclp_early_adjust_va	# allow sclp_early_printk
-#ifdef CONFIG_KASAN
-	brasl	%r14,kasan_early_init
-#endif
 	brasl	%r14,startup_init		# s390 specific early init
 	brasl	%r14,start_kernel		# common init code
 #
 # We returned from start_kernel ?!? PANIK
 #
 	basr	%r13,0
-	lpswe	.Ldw-.(%r13)		# load disabled wait psw
+	lpswe	dw_psw-.(%r13)		# load disabled wait psw
+SYM_CODE_END(startup_continue)
 
 	.align	16
-.LPG1:
-.Ldw:	.quad	0x0002000180000000,0x0000000000000000
+SYM_DATA_LOCAL(dw_psw,	.quad 0x0002000180000000,0x0000000000000000)
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 5f0f5c86963a..43de939b7af1 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -176,11 +176,11 @@ static bool reipl_fcp_clear;
 static bool reipl_ccw_clear;
 static bool reipl_eckd_clear;
 
-static inline int __diag308(unsigned long subcode, void *addr)
+static inline int __diag308(unsigned long subcode, unsigned long addr)
 {
 	union register_pair r1;
 
-	r1.even = (unsigned long) addr;
+	r1.even = addr;
 	r1.odd	= 0;
 	asm volatile(
 		"	diag	%[r1],%[subcode],0x308\n"
@@ -195,7 +195,7 @@ static inline int __diag308(unsigned long subcode, void *addr)
 int diag308(unsigned long subcode, void *addr)
 {
 	diag_stat_inc(DIAG_STAT_X308);
-	return __diag308(subcode, addr);
+	return __diag308(subcode, addr ? virt_to_phys(addr) : 0);
 }
 EXPORT_SYMBOL_GPL(diag308);
 
@@ -649,7 +649,6 @@ static struct kset *ipl_kset;
 
 static void __ipl_run(void *unused)
 {
-	__bpon();
 	diag308(DIAG308_LOAD_CLEAR, NULL);
 }
 
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 7b41ceecbb25..d4b863ed0aa7 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -41,7 +41,7 @@ void *alloc_insn_page(void)
 	page = module_alloc(PAGE_SIZE);
 	if (!page)
 		return NULL;
-	__set_memory((unsigned long) page, 1, SET_MEMORY_RO | SET_MEMORY_X);
+	set_memory_rox((unsigned long)page, 1);
 	return page;
 }
 
diff --git a/arch/s390/kernel/kprobes_insn_page.S b/arch/s390/kernel/kprobes_insn_page.S
index f6cb022ef8c8..b6335296dcd8 100644
--- a/arch/s390/kernel/kprobes_insn_page.S
+++ b/arch/s390/kernel/kprobes_insn_page.S
@@ -14,9 +14,9 @@
  */
 	.section .kprobes.text, "ax"
 	.align 4096
-ENTRY(kprobes_insn_page)
+SYM_CODE_START(kprobes_insn_page)
 	.rept 2048
 	.word 0x07fe
 	.endr
-ENDPROC(kprobes_insn_page)
+SYM_CODE_END(kprobes_insn_page)
 	.previous
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 2a8e73266428..6d9276c096a6 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -29,8 +29,8 @@
 #include <asm/nmi.h>
 #include <asm/sclp.h>
 
-typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long,
-				  unsigned long);
+typedef void (*relocate_kernel_t)(unsigned long, unsigned long, unsigned long);
+typedef int (*purgatory_t)(int);
 
 extern const unsigned char relocate_kernel[];
 extern const unsigned long long relocate_kernel_len;
@@ -41,11 +41,14 @@ extern const unsigned long long relocate_kernel_len;
  * Reset the system, copy boot CPU registers to absolute zero,
  * and jump to the kdump image
  */
-static void __do_machine_kdump(void *image)
+static void __do_machine_kdump(void *data)
 {
-	int (*start_kdump)(int);
+	struct kimage *image = data;
+	purgatory_t purgatory;
 	unsigned long prefix;
 
+	purgatory = (purgatory_t)image->start;
+
 	/* store_status() saved the prefix register to lowcore */
 	prefix = (unsigned long) S390_lowcore.prefixreg_save_area;
 
@@ -58,13 +61,11 @@ static void __do_machine_kdump(void *image)
 	 * prefix register of this CPU to zero
 	 */
 	memcpy(absolute_pointer(__LC_FPREGS_SAVE_AREA),
-	       (void *)(prefix + __LC_FPREGS_SAVE_AREA), 512);
+	       phys_to_virt(prefix + __LC_FPREGS_SAVE_AREA), 512);
 
-	__load_psw_mask(PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA);
-	start_kdump = (void *)((struct kimage *) image)->start;
-	start_kdump(1);
+	call_nodat(1, int, purgatory, int, 1);
 
-	/* Die if start_kdump returns */
+	/* Die if kdump returns */
 	disabled_wait();
 }
 
@@ -111,18 +112,6 @@ static noinline void __machine_kdump(void *image)
 	store_status(__do_machine_kdump, image);
 }
 
-static unsigned long do_start_kdump(unsigned long addr)
-{
-	struct kimage *image = (struct kimage *) addr;
-	int (*start_kdump)(int) = (void *)image->start;
-	int rc;
-
-	__arch_local_irq_stnsm(0xfb); /* disable DAT */
-	rc = start_kdump(0);
-	__arch_local_irq_stosm(0x04); /* enable DAT */
-	return rc;
-}
-
 #endif /* CONFIG_CRASH_DUMP */
 
 /*
@@ -131,12 +120,10 @@ static unsigned long do_start_kdump(unsigned long addr)
 static bool kdump_csum_valid(struct kimage *image)
 {
 #ifdef CONFIG_CRASH_DUMP
+	purgatory_t purgatory = (purgatory_t)image->start;
 	int rc;
 
-	preempt_disable();
-	rc = call_on_stack(1, S390_lowcore.nodat_stack, unsigned long, do_start_kdump,
-			   unsigned long, (unsigned long)image);
-	preempt_enable();
+	rc = call_nodat(1, int, purgatory, int, 0);
 	return rc == 0;
 #else
 	return false;
@@ -210,7 +197,7 @@ int machine_kexec_prepare(struct kimage *image)
 		return -EINVAL;
 
 	/* Get the destination where the assembler code should be copied to.*/
-	reboot_code_buffer = (void *) page_to_phys(image->control_code_page);
+	reboot_code_buffer = page_to_virt(image->control_code_page);
 
 	/* Then copy it */
 	memcpy(reboot_code_buffer, relocate_kernel, relocate_kernel_len);
@@ -250,19 +237,20 @@ void machine_crash_shutdown(struct pt_regs *regs)
  */
 static void __do_machine_kexec(void *data)
 {
-	unsigned long diag308_subcode;
-	relocate_kernel_t data_mover;
+	unsigned long data_mover, entry, diag308_subcode;
 	struct kimage *image = data;
 
-	s390_reset_system();
-	data_mover = (relocate_kernel_t) page_to_phys(image->control_code_page);
-
-	__arch_local_irq_stnsm(0xfb); /* disable DAT - avoid no-execute */
-	/* Call the moving routine */
+	data_mover = page_to_phys(image->control_code_page);
+	entry = virt_to_phys(&image->head);
 	diag308_subcode = DIAG308_CLEAR_RESET;
 	if (sclp.has_iplcc)
 		diag308_subcode |= DIAG308_FLAG_EI;
-	(*data_mover)(&image->head, image->start, diag308_subcode);
+	s390_reset_system();
+
+	call_nodat(3, void, (relocate_kernel_t)data_mover,
+		   unsigned long, entry,
+		   unsigned long, image->start,
+		   unsigned long, diag308_subcode);
 
 	/* Die if kexec returns */
 	disabled_wait();
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index 6c10da43b538..dbece2803c50 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -28,9 +28,9 @@
 
 	.section .kprobes.text, "ax"
 
-ENTRY(ftrace_stub)
+SYM_FUNC_START(ftrace_stub)
 	BR_EX	%r14
-ENDPROC(ftrace_stub)
+SYM_FUNC_END(ftrace_stub)
 
 SYM_CODE_START(ftrace_stub_direct_tramp)
 	lgr	%r1, %r0
@@ -140,10 +140,25 @@ SYM_FUNC_END(return_to_handler)
 #endif
 #endif /* CONFIG_FUNCTION_TRACER */
 
-#ifdef CONFIG_RETHOOK
+SYM_CODE_START(ftrace_shared_hotpatch_trampoline_br)
+	lmg	%r0,%r1,2(%r1)
+	br	%r1
+SYM_INNER_LABEL(ftrace_shared_hotpatch_trampoline_br_end, SYM_L_GLOBAL)
+SYM_CODE_END(ftrace_shared_hotpatch_trampoline_br)
+
+#ifdef CONFIG_EXPOLINE
+SYM_CODE_START(ftrace_shared_hotpatch_trampoline_exrl)
+	lmg	%r0,%r1,2(%r1)
+	exrl	%r0,0f
+	j	.
+0:	br	%r1
+SYM_INNER_LABEL(ftrace_shared_hotpatch_trampoline_exrl_end, SYM_L_GLOBAL)
+SYM_CODE_END(ftrace_shared_hotpatch_trampoline_exrl)
+#endif /* CONFIG_EXPOLINE */
 
-SYM_FUNC_START(arch_rethook_trampoline)
+#ifdef CONFIG_RETHOOK
 
+SYM_CODE_START(arch_rethook_trampoline)
 	stg	%r14,(__SF_GPRS+8*8)(%r15)
 	lay	%r15,-STACK_FRAME_SIZE(%r15)
 	stmg	%r0,%r14,STACK_PTREGS_GPRS(%r15)
@@ -166,7 +181,6 @@ SYM_FUNC_START(arch_rethook_trampoline)
 	mvc	__SF_EMPTY(16,%r7),STACK_PTREGS_PSW(%r15)
 	lmg	%r0,%r15,STACK_PTREGS_GPRS(%r15)
 	lpswe	__SF_EMPTY(%r15)
-
-SYM_FUNC_END(arch_rethook_trampoline)
+SYM_CODE_END(arch_rethook_trampoline)
 
 #endif /* CONFIG_RETHOOK */
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index b9dbf0c483ed..f1b35dcdf3eb 100644
--- a/arch/s390/kernel/module.c
+++ b/arch/s390/kernel/module.c
@@ -26,6 +26,7 @@
 #include <asm/facility.h>
 #include <asm/ftrace.lds.h>
 #include <asm/set_memory.h>
+#include <asm/setup.h>
 
 #if 0
 #define DEBUGP printk
@@ -35,6 +36,24 @@
 
 #define PLT_ENTRY_SIZE 22
 
+static unsigned long get_module_load_offset(void)
+{
+	static DEFINE_MUTEX(module_kaslr_mutex);
+	static unsigned long module_load_offset;
+
+	if (!kaslr_enabled())
+		return 0;
+	/*
+	 * Calculate the module_load_offset the first time this code
+	 * is called. Once calculated it stays the same until reboot.
+	 */
+	mutex_lock(&module_kaslr_mutex);
+	if (!module_load_offset)
+		module_load_offset = get_random_u32_inclusive(1, 1024) * PAGE_SIZE;
+	mutex_unlock(&module_kaslr_mutex);
+	return module_load_offset;
+}
+
 void *module_alloc(unsigned long size)
 {
 	gfp_t gfp_mask = GFP_KERNEL;
@@ -42,9 +61,11 @@ void *module_alloc(unsigned long size)
 
 	if (PAGE_ALIGN(size) > MODULES_LEN)
 		return NULL;
-	p = __vmalloc_node_range(size, MODULE_ALIGN, MODULES_VADDR, MODULES_END,
-				 gfp_mask, PAGE_KERNEL_EXEC, VM_DEFER_KMEMLEAK, NUMA_NO_NODE,
-				 __builtin_return_address(0));
+	p = __vmalloc_node_range(size, MODULE_ALIGN,
+				 MODULES_VADDR + get_module_load_offset(),
+				 MODULES_END, gfp_mask, PAGE_KERNEL,
+				 VM_FLUSH_RESET_PERMS | VM_DEFER_KMEMLEAK,
+				 NUMA_NO_NODE, __builtin_return_address(0));
 	if (p && (kasan_alloc_module_shadow(p, size, gfp_mask) < 0)) {
 		vfree(p);
 		return NULL;
@@ -491,7 +512,7 @@ static int module_alloc_ftrace_hotpatch_trampolines(struct module *me,
 	start = module_alloc(numpages * PAGE_SIZE);
 	if (!start)
 		return -ENOMEM;
-	set_memory_ro((unsigned long)start, numpages);
+	set_memory_rox((unsigned long)start, numpages);
 	end = start + size;
 
 	me->arch.trampolines_start = (struct ftrace_hotpatch_trampoline *)start;
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index c9ab971498d6..cf1b6e8a708d 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -76,7 +76,6 @@ static inline int ctr_stcctm(enum cpumf_ctr_set set, u64 range, u64 *dest)
 }
 
 struct cpu_cf_events {
-	struct cpumf_ctr_info	info;
 	atomic_t		ctr_set[CPUMF_CTR_SET_MAX];
 	u64			state;		/* For perf_event_open SVC */
 	u64			dev_state;	/* For /dev/hwctr */
@@ -95,6 +94,15 @@ static DEFINE_PER_CPU(struct cpu_cf_events, cpu_cf_events);
 static unsigned int cfdiag_cpu_speed;	/* CPU speed for CF_DIAG trailer */
 static debug_info_t *cf_dbg;
 
+/*
+ * The CPU Measurement query counter information instruction contains
+ * information which varies per machine generation, but is constant and
+ * does not change when running on a particular machine, such as counter
+ * first and second version number. This is needed to determine the size
+ * of counter sets. Extract this information at device driver initialization.
+ */
+static struct cpumf_ctr_info	cpumf_ctr_info;
+
 #define	CF_DIAG_CTRSET_DEF		0xfeef	/* Counter set header mark */
 						/* interval in seconds */
 
@@ -167,11 +175,10 @@ struct cf_trailer_entry {	/* CPU-M CF_DIAG trailer (64 byte) */
 /* Create the trailer data at the end of a page. */
 static void cfdiag_trailer(struct cf_trailer_entry *te)
 {
-	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 	struct cpuid cpuid;
 
-	te->cfvn = cpuhw->info.cfvn;		/* Counter version numbers */
-	te->csvn = cpuhw->info.csvn;
+	te->cfvn = cpumf_ctr_info.cfvn;		/* Counter version numbers */
+	te->csvn = cpumf_ctr_info.csvn;
 
 	get_cpu_id(&cpuid);			/* Machine type */
 	te->mach_type = cpuid.machine;
@@ -184,50 +191,60 @@ static void cfdiag_trailer(struct cf_trailer_entry *te)
 }
 
 /*
- * Return the maximum possible counter set size (in number of 8 byte counters)
- * depending on type and model number.
+ * The number of counters per counter set varies between machine generations,
+ * but is constant when running on a particular machine generation.
+ * Determine each counter set size at device driver initialization and
+ * retrieve it later.
  */
-static size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
-				  struct cpumf_ctr_info *info)
+static size_t cpumf_ctr_setsizes[CPUMF_CTR_SET_MAX];
+static void cpum_cf_make_setsize(enum cpumf_ctr_set ctrset)
 {
 	size_t ctrset_size = 0;
 
 	switch (ctrset) {
 	case CPUMF_CTR_SET_BASIC:
-		if (info->cfvn >= 1)
+		if (cpumf_ctr_info.cfvn >= 1)
 			ctrset_size = 6;
 		break;
 	case CPUMF_CTR_SET_USER:
-		if (info->cfvn == 1)
+		if (cpumf_ctr_info.cfvn == 1)
 			ctrset_size = 6;
-		else if (info->cfvn >= 3)
+		else if (cpumf_ctr_info.cfvn >= 3)
 			ctrset_size = 2;
 		break;
 	case CPUMF_CTR_SET_CRYPTO:
-		if (info->csvn >= 1 && info->csvn <= 5)
+		if (cpumf_ctr_info.csvn >= 1 && cpumf_ctr_info.csvn <= 5)
 			ctrset_size = 16;
-		else if (info->csvn == 6 || info->csvn == 7)
+		else if (cpumf_ctr_info.csvn == 6 || cpumf_ctr_info.csvn == 7)
 			ctrset_size = 20;
 		break;
 	case CPUMF_CTR_SET_EXT:
-		if (info->csvn == 1)
+		if (cpumf_ctr_info.csvn == 1)
 			ctrset_size = 32;
-		else if (info->csvn == 2)
+		else if (cpumf_ctr_info.csvn == 2)
 			ctrset_size = 48;
-		else if (info->csvn >= 3 && info->csvn <= 5)
+		else if (cpumf_ctr_info.csvn >= 3 && cpumf_ctr_info.csvn <= 5)
 			ctrset_size = 128;
-		else if (info->csvn == 6 || info->csvn == 7)
+		else if (cpumf_ctr_info.csvn == 6 || cpumf_ctr_info.csvn == 7)
 			ctrset_size = 160;
 		break;
 	case CPUMF_CTR_SET_MT_DIAG:
-		if (info->csvn > 3)
+		if (cpumf_ctr_info.csvn > 3)
 			ctrset_size = 48;
 		break;
 	case CPUMF_CTR_SET_MAX:
 		break;
 	}
+	cpumf_ctr_setsizes[ctrset] = ctrset_size;
+}
 
-	return ctrset_size;
+/*
+ * Return the maximum possible counter set size (in number of 8 byte counters)
+ * depending on type and model number.
+ */
+static size_t cpum_cf_read_setsize(enum cpumf_ctr_set ctrset)
+{
+	return cpumf_ctr_setsizes[ctrset];
 }
 
 /* Read a counter set. The counter set number determines the counter set and
@@ -248,14 +265,13 @@ static size_t cpum_cf_ctrset_size(enum cpumf_ctr_set ctrset,
 static size_t cfdiag_getctrset(struct cf_ctrset_entry *ctrdata, int ctrset,
 			       size_t room, bool error_ok)
 {
-	struct cpu_cf_events *cpuhw = this_cpu_ptr(&cpu_cf_events);
 	size_t ctrset_size, need = 0;
 	int rc = 3;				/* Assume write failure */
 
 	ctrdata->def = CF_DIAG_CTRSET_DEF;
 	ctrdata->set = ctrset;
 	ctrdata->res1 = 0;
-	ctrset_size = cpum_cf_ctrset_size(ctrset, &cpuhw->info);
+	ctrset_size = cpum_cf_read_setsize(ctrset);
 
 	if (ctrset_size) {			/* Save data */
 		need = ctrset_size * sizeof(u64) + sizeof(*ctrdata);
@@ -269,10 +285,6 @@ static size_t cfdiag_getctrset(struct cf_ctrset_entry *ctrdata, int ctrset,
 			need = 0;
 	}
 
-	debug_sprintf_event(cf_dbg, 3,
-			    "%s ctrset %d ctrset_size %zu cfvn %d csvn %d"
-			    " need %zd rc %d\n", __func__, ctrset, ctrset_size,
-			    cpuhw->info.cfvn, cpuhw->info.csvn, need, rc);
 	return need;
 }
 
@@ -377,40 +389,35 @@ static enum cpumf_ctr_set get_counter_set(u64 event)
 	return set;
 }
 
-static int validate_ctr_version(const struct hw_perf_event *hwc,
-				enum cpumf_ctr_set set)
+static int validate_ctr_version(const u64 config, enum cpumf_ctr_set set)
 {
-	struct cpu_cf_events *cpuhw;
-	int err = 0;
 	u16 mtdiag_ctl;
-
-	cpuhw = &get_cpu_var(cpu_cf_events);
+	int err = 0;
 
 	/* check required version for counter sets */
 	switch (set) {
 	case CPUMF_CTR_SET_BASIC:
 	case CPUMF_CTR_SET_USER:
-		if (cpuhw->info.cfvn < 1)
+		if (cpumf_ctr_info.cfvn < 1)
 			err = -EOPNOTSUPP;
 		break;
 	case CPUMF_CTR_SET_CRYPTO:
-		if ((cpuhw->info.csvn >= 1 && cpuhw->info.csvn <= 5 &&
-		     hwc->config > 79) ||
-		    (cpuhw->info.csvn >= 6 && hwc->config > 83))
+		if ((cpumf_ctr_info.csvn >= 1 && cpumf_ctr_info.csvn <= 5 &&
+		     config > 79) || (cpumf_ctr_info.csvn >= 6 && config > 83))
 			err = -EOPNOTSUPP;
 		break;
 	case CPUMF_CTR_SET_EXT:
-		if (cpuhw->info.csvn < 1)
+		if (cpumf_ctr_info.csvn < 1)
 			err = -EOPNOTSUPP;
-		if ((cpuhw->info.csvn == 1 && hwc->config > 159) ||
-		    (cpuhw->info.csvn == 2 && hwc->config > 175) ||
-		    (cpuhw->info.csvn >= 3 && cpuhw->info.csvn <= 5
-		     && hwc->config > 255) ||
-		    (cpuhw->info.csvn >= 6 && hwc->config > 287))
+		if ((cpumf_ctr_info.csvn == 1 && config > 159) ||
+		    (cpumf_ctr_info.csvn == 2 && config > 175) ||
+		    (cpumf_ctr_info.csvn >= 3 && cpumf_ctr_info.csvn <= 5 &&
+		     config > 255) ||
+		    (cpumf_ctr_info.csvn >= 6 && config > 287))
 			err = -EOPNOTSUPP;
 		break;
 	case CPUMF_CTR_SET_MT_DIAG:
-		if (cpuhw->info.csvn <= 3)
+		if (cpumf_ctr_info.csvn <= 3)
 			err = -EOPNOTSUPP;
 		/*
 		 * MT-diagnostic counters are read-only.  The counter set
@@ -425,35 +432,15 @@ static int validate_ctr_version(const struct hw_perf_event *hwc,
 		 * counter set is enabled and active.
 		 */
 		mtdiag_ctl = cpumf_ctr_ctl[CPUMF_CTR_SET_MT_DIAG];
-		if (!((cpuhw->info.auth_ctl & mtdiag_ctl) &&
-		      (cpuhw->info.enable_ctl & mtdiag_ctl) &&
-		      (cpuhw->info.act_ctl & mtdiag_ctl)))
+		if (!((cpumf_ctr_info.auth_ctl & mtdiag_ctl) &&
+		      (cpumf_ctr_info.enable_ctl & mtdiag_ctl) &&
+		      (cpumf_ctr_info.act_ctl & mtdiag_ctl)))
 			err = -EOPNOTSUPP;
 		break;
 	case CPUMF_CTR_SET_MAX:
 		err = -EOPNOTSUPP;
 	}
 
-	put_cpu_var(cpu_cf_events);
-	return err;
-}
-
-static int validate_ctr_auth(const struct hw_perf_event *hwc)
-{
-	struct cpu_cf_events *cpuhw;
-	int err = 0;
-
-	cpuhw = &get_cpu_var(cpu_cf_events);
-
-	/* Check authorization for cpu counter sets.
-	 * If the particular CPU counter set is not authorized,
-	 * return with -ENOENT in order to fall back to other
-	 * PMUs that might suffice the event request.
-	 */
-	if (!(hwc->config_base & cpuhw->info.auth_ctl))
-		err = -ENOENT;
-
-	put_cpu_var(cpu_cf_events);
 	return err;
 }
 
@@ -471,13 +458,10 @@ static void cpumf_pmu_enable(struct pmu *pmu)
 		return;
 
 	err = lcctl(cpuhw->state | cpuhw->dev_state);
-	if (err) {
-		pr_err("Enabling the performance measuring unit "
-		       "failed with rc=%x\n", err);
-		return;
-	}
-
-	cpuhw->flags |= PMU_F_ENABLED;
+	if (err)
+		pr_err("Enabling the performance measuring unit failed with rc=%x\n", err);
+	else
+		cpuhw->flags |= PMU_F_ENABLED;
 }
 
 /*
@@ -497,13 +481,10 @@ static void cpumf_pmu_disable(struct pmu *pmu)
 	inactive = cpuhw->state & ~((1 << CPUMF_LCCTL_ENABLE_SHIFT) - 1);
 	inactive |= cpuhw->dev_state;
 	err = lcctl(inactive);
-	if (err) {
-		pr_err("Disabling the performance measuring unit "
-		       "failed with rc=%x\n", err);
-		return;
-	}
-
-	cpuhw->flags &= ~PMU_F_ENABLED;
+	if (err)
+		pr_err("Disabling the performance measuring unit failed with rc=%x\n", err);
+	else
+		cpuhw->flags &= ~PMU_F_ENABLED;
 }
 
 #define PMC_INIT      0UL
@@ -515,8 +496,6 @@ static void cpum_cf_setup_cpu(void *flags)
 
 	switch ((unsigned long)flags) {
 	case PMC_INIT:
-		memset(&cpuhw->info, 0, sizeof(cpuhw->info));
-		qctri(&cpuhw->info);
 		cpuhw->flags |= PMU_F_RESERVED;
 		break;
 
@@ -602,7 +581,6 @@ static int __hw_perf_event_init(struct perf_event *event, unsigned int type)
 	struct perf_event_attr *attr = &event->attr;
 	struct hw_perf_event *hwc = &event->hw;
 	enum cpumf_ctr_set set;
-	int err = 0;
 	u64 ev;
 
 	switch (type) {
@@ -678,12 +656,15 @@ static int __hw_perf_event_init(struct perf_event *event, unsigned int type)
 	cpumf_hw_inuse();
 	event->destroy = hw_perf_event_destroy;
 
-	/* Finally, validate version and authorization of the counter set */
-	err = validate_ctr_auth(hwc);
-	if (!err)
-		err = validate_ctr_version(hwc, set);
-
-	return err;
+	/*
+	 * Finally, validate version and authorization of the counter set.
+	 * If the particular CPU counter set is not authorized,
+	 * return with -ENOENT in order to fall back to other
+	 * PMUs that might suffice the event request.
+	 */
+	if (!(hwc->config_base & cpumf_ctr_info.auth_ctl))
+		return -ENOENT;
+	return validate_ctr_version(hwc->config, set);
 }
 
 /* Events CPU_CYLCES and INSTRUCTIONS can be submitted with two different
@@ -983,7 +964,7 @@ static void cpumf_measurement_alert(struct ext_code ext_code,
 
 	/* counter authorization change alert */
 	if (alert & CPU_MF_INT_CF_CACA)
-		qctri(&cpuhw->info);
+		qctri(&cpumf_ctr_info);
 
 	/* loss of counter data alert */
 	if (alert & CPU_MF_INT_CF_LCDA)
@@ -1000,9 +981,14 @@ static int __init cpumf_pmu_init(void)
 {
 	int rc;
 
-	if (!cpum_cf_avail())
+	/* Extract counter measurement facility information */
+	if (!cpum_cf_avail() || qctri(&cpumf_ctr_info))
 		return -ENODEV;
 
+	/* Determine and store counter set sizes for later reference */
+	for (rc = CPUMF_CTR_SET_BASIC; rc < CPUMF_CTR_SET_MAX; ++rc)
+		cpum_cf_make_setsize(rc);
+
 	/*
 	 * Clear bit 15 of cr0 to unauthorize problem-state to
 	 * extract measurement counters
@@ -1269,28 +1255,26 @@ static int cfset_all_start(struct cfset_request *req)
  */
 static size_t cfset_needspace(unsigned int sets)
 {
-	struct cpu_cf_events *cpuhw = get_cpu_ptr(&cpu_cf_events);
 	size_t bytes = 0;
 	int i;
 
 	for (i = CPUMF_CTR_SET_BASIC; i < CPUMF_CTR_SET_MAX; ++i) {
 		if (!(sets & cpumf_ctr_ctl[i]))
 			continue;
-		bytes += cpum_cf_ctrset_size(i, &cpuhw->info) * sizeof(u64) +
+		bytes += cpum_cf_read_setsize(i) * sizeof(u64) +
 			 sizeof(((struct s390_ctrset_setdata *)0)->set) +
 			 sizeof(((struct s390_ctrset_setdata *)0)->no_cnts);
 	}
 	bytes = sizeof(((struct s390_ctrset_read *)0)->no_cpus) + nr_cpu_ids *
 		(bytes + sizeof(((struct s390_ctrset_cpudata *)0)->cpu_nr) +
 		     sizeof(((struct s390_ctrset_cpudata *)0)->no_sets));
-	put_cpu_ptr(&cpu_cf_events);
 	return bytes;
 }
 
 static int cfset_all_copy(unsigned long arg, cpumask_t *mask)
 {
 	struct s390_ctrset_read __user *ctrset_read;
-	unsigned int cpu, cpus, rc;
+	unsigned int cpu, cpus, rc = 0;
 	void __user *uptr;
 
 	ctrset_read = (struct s390_ctrset_read __user *)arg;
@@ -1304,17 +1288,20 @@ static int cfset_all_copy(unsigned long arg, cpumask_t *mask)
 		rc |= put_user(cpuhw->sets, &ctrset_cpudata->no_sets);
 		rc |= copy_to_user(ctrset_cpudata->data, cpuhw->data,
 				   cpuhw->used);
-		if (rc)
-			return -EFAULT;
+		if (rc) {
+			rc = -EFAULT;
+			goto out;
+		}
 		uptr += sizeof(struct s390_ctrset_cpudata) + cpuhw->used;
 		cond_resched();
 	}
 	cpus = cpumask_weight(mask);
 	if (put_user(cpus, &ctrset_read->no_cpus))
-		return -EFAULT;
-	debug_sprintf_event(cf_dbg, 4, "%s copied %ld\n", __func__,
+		rc = -EFAULT;
+out:
+	debug_sprintf_event(cf_dbg, 4, "%s rc %d copied %ld\n", __func__, rc,
 			    uptr - (void __user *)ctrset_read->data);
-	return 0;
+	return rc;
 }
 
 static size_t cfset_cpuset_read(struct s390_ctrset_setdata *p, int ctrset,
@@ -1354,7 +1341,7 @@ static void cfset_cpu_read(void *parm)
 
 		if (!(p->sets & cpumf_ctr_ctl[set]))
 			continue;	/* Counter set not in list */
-		set_size = cpum_cf_ctrset_size(set, &cpuhw->info);
+		set_size = cpum_cf_read_setsize(set);
 		space = sizeof(cpuhw->data) - cpuhw->used;
 		space = cfset_cpuset_read(sp, set, set_size, space);
 		if (space) {
@@ -1385,14 +1372,10 @@ static int cfset_all_read(unsigned long arg, struct cfset_request *req)
 
 static long cfset_ioctl_read(unsigned long arg, struct cfset_request *req)
 {
-	struct s390_ctrset_read read;
 	int ret = -ENODATA;
 
-	if (req && req->ctrset) {
-		if (copy_from_user(&read, (char __user *)arg, sizeof(read)))
-			return -EFAULT;
+	if (req && req->ctrset)
 		ret = cfset_all_read(arg, req);
-	}
 	return ret;
 }
 
@@ -1569,16 +1552,13 @@ static void cfdiag_read(struct perf_event *event)
 
 static int get_authctrsets(void)
 {
-	struct cpu_cf_events *cpuhw;
 	unsigned long auth = 0;
 	enum cpumf_ctr_set i;
 
-	cpuhw = &get_cpu_var(cpu_cf_events);
 	for (i = CPUMF_CTR_SET_BASIC; i < CPUMF_CTR_SET_MAX; ++i) {
-		if (cpuhw->info.auth_ctl & cpumf_ctr_ctl[i])
+		if (cpumf_ctr_info.auth_ctl & cpumf_ctr_ctl[i])
 			auth |= cpumf_ctr_ctl[i];
 	}
-	put_cpu_var(cpu_cf_events);
 	return auth;
 }
 
@@ -1716,7 +1696,7 @@ static size_t cfdiag_maxsize(struct cpumf_ctr_info *info)
 	enum cpumf_ctr_set i;
 
 	for (i = CPUMF_CTR_SET_BASIC; i < CPUMF_CTR_SET_MAX; ++i) {
-		size_t size = cpum_cf_ctrset_size(i, info);
+		size_t size = cpum_cf_read_setsize(i);
 
 		if (size)
 			max_size += size * sizeof(u64) +
@@ -1750,16 +1730,12 @@ static void cfdiag_get_cpu_speed(void)
 
 static int cfset_init(void)
 {
-	struct cpumf_ctr_info info;
 	size_t need;
 	int rc;
 
-	if (qctri(&info))
-		return -ENODEV;
-
 	cfdiag_get_cpu_speed();
 	/* Make sure the counter set data fits into predefined buffer. */
-	need = cfdiag_maxsize(&info);
+	need = cfdiag_maxsize(&cpumf_ctr_info);
 	if (need > sizeof(((struct cpu_cf_events *)0)->start)) {
 		pr_err("Insufficient memory for PMU(cpum_cf_diag) need=%zu\n",
 		       need);
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index e7b867e2f73f..7ef72f5ff52e 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -882,10 +882,6 @@ static int __hw_perf_event_init(struct perf_event *event)
 		SAMPL_FLAGS(hwc) |= PERF_CPUM_SF_DIAG_MODE;
 	}
 
-	/* Check and set other sampling flags */
-	if (attr->config1 & PERF_CPUM_SF_FULL_BLOCKS)
-		SAMPL_FLAGS(hwc) |= PERF_CPUM_SF_FULL_BLOCKS;
-
 	err =  __hw_perf_event_init_rate(event, &si);
 	if (err)
 		goto out;
@@ -1293,11 +1289,8 @@ static inline __uint128_t __cdsg(__uint128_t *ptr, __uint128_t old, __uint128_t
  * The sampling buffer position are retrieved and saved in the TEAR_REG
  * register of the specified perf event.
  *
- * Only full sample-data-blocks are processed.	Specify the flash_all flag
- * to also walk through partially filled sample-data-blocks.  It is ignored
- * if PERF_CPUM_SF_FULL_BLOCKS is set.	The PERF_CPUM_SF_FULL_BLOCKS flag
- * enforces the processing of full sample-data-blocks only (trailer entries
- * with the block-full-indicator bit set).
+ * Only full sample-data-blocks are processed.	Specify the flush_all flag
+ * to also walk through partially filled sample-data-blocks.
  */
 static void hw_perf_event_update(struct perf_event *event, int flush_all)
 {
@@ -1315,9 +1308,6 @@ static void hw_perf_event_update(struct perf_event *event, int flush_all)
 	if (SAMPL_DIAG_MODE(&event->hw))
 		return;
 
-	if (flush_all && SDB_FULL_BLOCKS(hwc))
-		flush_all = 0;
-
 	sdbt = (unsigned long *) TEAR_REG(hwc);
 	done = event_overflow = sampl_overflow = num_sdb = 0;
 	while (!done) {
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 67df64ef4839..87ca3a727604 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -136,12 +136,12 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 	p->thread.last_break = 1;
 
 	frame->sf.back_chain = 0;
-	frame->sf.gprs[5] = (unsigned long)frame + sizeof(struct stack_frame);
-	frame->sf.gprs[6] = (unsigned long)p;
+	frame->sf.gprs[11 - 6] = (unsigned long)&frame->childregs;
+	frame->sf.gprs[12 - 6] = (unsigned long)p;
 	/* new return point is ret_from_fork */
-	frame->sf.gprs[8] = (unsigned long)ret_from_fork;
+	frame->sf.gprs[14 - 6] = (unsigned long)ret_from_fork;
 	/* fake return stack for resume(), don't go back to schedule */
-	frame->sf.gprs[9] = (unsigned long)frame;
+	frame->sf.gprs[15 - 6] = (unsigned long)frame;
 
 	/* Store access registers to kernel stack of new process. */
 	if (unlikely(args->fn)) {
@@ -149,8 +149,6 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args)
 		memset(&frame->childregs, 0, sizeof(struct pt_regs));
 		frame->childregs.psw.mask = PSW_KERNEL_BITS | PSW_MASK_IO |
 					    PSW_MASK_EXT | PSW_MASK_MCHECK;
-		frame->childregs.psw.addr =
-				(unsigned long)__ret_from_fork;
 		frame->childregs.gprs[9] = (unsigned long)args->fn;
 		frame->childregs.gprs[10] = (unsigned long)args->fn_arg;
 		frame->childregs.orig_gpr2 = -1;
diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
index a194611ba88c..0a999c8226d7 100644
--- a/arch/s390/kernel/processor.c
+++ b/arch/s390/kernel/processor.c
@@ -364,21 +364,3 @@ const struct seq_operations cpuinfo_op = {
 	.stop	= c_stop,
 	.show	= show_cpuinfo,
 };
-
-int s390_isolate_bp(void)
-{
-	if (!test_facility(82))
-		return -EOPNOTSUPP;
-	set_thread_flag(TIF_ISOLATE_BP);
-	return 0;
-}
-EXPORT_SYMBOL(s390_isolate_bp);
-
-int s390_isolate_bp_guest(void)
-{
-	if (!test_facility(82))
-		return -EOPNOTSUPP;
-	set_thread_flag(TIF_ISOLATE_BP_GUEST);
-	return 0;
-}
-EXPORT_SYMBOL(s390_isolate_bp_guest);
diff --git a/arch/s390/kernel/reipl.S b/arch/s390/kernel/reipl.S
index 4a22163962eb..88087a32ebc6 100644
--- a/arch/s390/kernel/reipl.S
+++ b/arch/s390/kernel/reipl.S
@@ -19,7 +19,7 @@
 # r2 = Function to be called after store status
 # r3 = Parameter for function
 #
-ENTRY(store_status)
+SYM_CODE_START(store_status)
 	/* Save register one and load save area base */
 	stg	%r1,__LC_SAVE_AREA_RESTART
 	/* General purpose registers */
@@ -61,7 +61,7 @@ ENTRY(store_status)
 	stpx	0(%r1)
 	/* Clock comparator - seven bytes */
 	lghi	%r1,__LC_CLOCK_COMP_SAVE_AREA
-	larl	%r4,.Lclkcmp
+	larl	%r4,clkcmp
 	stckc	0(%r4)
 	mvc	1(7,%r1),1(%r4)
 	/* Program status word */
@@ -73,9 +73,9 @@ ENTRY(store_status)
 	lgr	%r9,%r2
 	lgr	%r2,%r3
 	BR_EX	%r9
-ENDPROC(store_status)
+SYM_CODE_END(store_status)
 
 	.section .bss
-	.align	8
-.Lclkcmp:	.quad	0x0000000000000000
+	.balign	8
+SYM_DATA_LOCAL(clkcmp,	.quad 0x0000000000000000)
 	.previous
diff --git a/arch/s390/kernel/relocate_kernel.S b/arch/s390/kernel/relocate_kernel.S
index a9a1a6f45375..0ae297c82afd 100644
--- a/arch/s390/kernel/relocate_kernel.S
+++ b/arch/s390/kernel/relocate_kernel.S
@@ -26,53 +26,51 @@
  */
 
 	.text
-ENTRY(relocate_kernel)
-		basr	%r13,0		# base address
-	.base:
-		lghi	%r7,PAGE_SIZE	# load PAGE_SIZE in r7
-		lghi	%r9,PAGE_SIZE	# load PAGE_SIZE in r9
-		lg	%r5,0(%r2)	# read another word for indirection page
-		aghi	%r2,8		# increment pointer
-		tml	%r5,0x1		# is it a destination page?
-		je	.indir_check	# NO, goto "indir_check"
-		lgr	%r6,%r5		# r6 = r5
-		nill	%r6,0xf000	# mask it out and...
-		j	.base		# ...next iteration
-	.indir_check:
-		tml	%r5,0x2		# is it a indirection page?
-		je	.done_test	# NO, goto "done_test"
-		nill	%r5,0xf000	# YES, mask out,
-		lgr	%r2,%r5		# move it into the right register,
-		j	.base		# and read next...
-	.done_test:
-		tml	%r5,0x4		# is it the done indicator?
-		je	.source_test	# NO! Well, then it should be the source indicator...
-		j	.done		# ok, lets finish it here...
-	.source_test:
-		tml	%r5,0x8		# it should be a source indicator...
-		je	.base		# NO, ignore it...
-		lgr	%r8,%r5		# r8 = r5
-		nill	%r8,0xf000	# masking
-	0:	mvcle	%r6,%r8,0x0	# copy PAGE_SIZE bytes from r8 to r6 - pad with 0
-		jo	0b
-		j	.base
-	.done:
-		lgr	%r0,%r4		# subcode
-		cghi	%r3,0
-		je	.diag
-		la	%r4,load_psw-.base(%r13)	# load psw-address into the register
-		o	%r3,4(%r4)	# or load address into psw
-		st	%r3,4(%r4)
-		mvc	0(8,%r0),0(%r4)	# copy psw to absolute address 0
-	.diag:
-		diag	%r0,%r0,0x308
-ENDPROC(relocate_kernel)
+SYM_CODE_START(relocate_kernel)
+	basr	%r13,0		# base address
+.base:
+	lghi	%r7,PAGE_SIZE	# load PAGE_SIZE in r7
+	lghi	%r9,PAGE_SIZE	# load PAGE_SIZE in r9
+	lg	%r5,0(%r2)	# read another word for indirection page
+	aghi	%r2,8		# increment pointer
+	tml	%r5,0x1		# is it a destination page?
+	je	.indir_check	# NO, goto "indir_check"
+	lgr	%r6,%r5		# r6 = r5
+	nill	%r6,0xf000	# mask it out and...
+	j	.base		# ...next iteration
+.indir_check:
+	tml	%r5,0x2		# is it a indirection page?
+	je	.done_test	# NO, goto "done_test"
+	nill	%r5,0xf000	# YES, mask out,
+	lgr	%r2,%r5		# move it into the right register,
+	j	.base		# and read next...
+.done_test:
+	tml	%r5,0x4		# is it the done indicator?
+	je	.source_test	# NO! Well, then it should be the source indicator...
+	j	.done		# ok, lets finish it here...
+.source_test:
+	tml	%r5,0x8		# it should be a source indicator...
+	je	.base		# NO, ignore it...
+	lgr	%r8,%r5		# r8 = r5
+	nill	%r8,0xf000	# masking
+0:	mvcle	%r6,%r8,0x0	# copy PAGE_SIZE bytes from r8 to r6 - pad with 0
+	jo	0b
+	j	.base
+.done:
+	lgr	%r0,%r4		# subcode
+	cghi	%r3,0
+	je	.diag
+	la	%r4,load_psw-.base(%r13)	# load psw-address into the register
+	o	%r3,4(%r4)	# or load address into psw
+	st	%r3,4(%r4)
+	mvc	0(8,%r0),0(%r4)	# copy psw to absolute address 0
+.diag:
+	diag	%r0,%r0,0x308
+SYM_CODE_END(relocate_kernel)
 
-		.align	8
-	load_psw:
-		.long	0x00080000,0x80000000
-	relocate_kernel_end:
-	.align 8
-	.globl	relocate_kernel_len
-	relocate_kernel_len:
-		.quad	relocate_kernel_end - relocate_kernel
+	.balign	8
+SYM_DATA_START_LOCAL(load_psw)
+	.long	0x00080000,0x80000000
+SYM_DATA_END_LABEL(load_psw, SYM_L_LOCAL, relocate_kernel_end)
+	.balign 8
+SYM_DATA(relocate_kernel_len, .quad relocate_kernel_end - relocate_kernel)
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 4259b6c50516..fe10da1a271e 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -74,7 +74,7 @@
 #include <asm/numa.h>
 #include <asm/alternative.h>
 #include <asm/nospec-branch.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/maccess.h>
 #include <asm/uv.h>
 #include <asm/asm-offsets.h>
@@ -147,14 +147,10 @@ static u32 __amode31_ref *__ctl_duct = __ctl_duct_amode31;
 
 int __bootdata(noexec_disabled);
 unsigned long __bootdata(ident_map_size);
-struct mem_detect_info __bootdata(mem_detect);
-struct initrd_data __bootdata(initrd_data);
-unsigned long __bootdata(pgalloc_pos);
-unsigned long __bootdata(pgalloc_end);
-unsigned long __bootdata(pgalloc_low);
+struct physmem_info __bootdata(physmem_info);
 
 unsigned long __bootdata_preserved(__kaslr_offset);
-unsigned long __bootdata(__amode31_base);
+int __bootdata_preserved(__kaslr_enabled);
 unsigned int __bootdata_preserved(zlib_dfltcc_support);
 EXPORT_SYMBOL(zlib_dfltcc_support);
 u64 __bootdata_preserved(stfle_fac_list[16]);
@@ -385,39 +381,27 @@ void stack_free(unsigned long stack)
 #endif
 }
 
-int __init arch_early_irq_init(void)
+void __init __noreturn arch_call_rest_init(void)
 {
-	unsigned long stack;
-
-	stack = __get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER);
-	if (!stack)
-		panic("Couldn't allocate async stack");
-	S390_lowcore.async_stack = stack + STACK_INIT_OFFSET;
-	return 0;
+	smp_reinit_ipl_cpu();
+	rest_init();
 }
 
-void __init __noreturn arch_call_rest_init(void)
+static unsigned long __init stack_alloc_early(void)
 {
 	unsigned long stack;
 
-	smp_reinit_ipl_cpu();
-	stack = stack_alloc();
-	if (!stack)
-		panic("Couldn't allocate kernel stack");
-	current->stack = (void *) stack;
-#ifdef CONFIG_VMAP_STACK
-	current->stack_vm_area = (void *) stack;
-#endif
-	set_task_stack_end_magic(current);
-	stack += STACK_INIT_OFFSET;
-	S390_lowcore.kernel_stack = stack;
-	call_on_stack_noreturn(rest_init, stack);
+	stack = (unsigned long)memblock_alloc(THREAD_SIZE, THREAD_SIZE);
+	if (!stack) {
+		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+		      __func__, THREAD_SIZE, THREAD_SIZE);
+	}
+	return stack;
 }
 
 static void __init setup_lowcore(void)
 {
 	struct lowcore *lc, *abs_lc;
-	unsigned long mcck_stack;
 
 	/*
 	 * Setup lowcore for boot cpu
@@ -441,8 +425,6 @@ static void __init setup_lowcore(void)
 	lc->io_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
 	lc->io_new_psw.addr = (unsigned long) io_int_handler;
 	lc->clock_comparator = clock_comparator_max;
-	lc->nodat_stack = ((unsigned long) &init_thread_union)
-		+ THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
 	lc->current_task = (unsigned long)&init_task;
 	lc->lpp = LPP_MAGIC;
 	lc->machine_flags = S390_lowcore.machine_flags;
@@ -455,17 +437,15 @@ static void __init setup_lowcore(void)
 	lc->steal_timer = S390_lowcore.steal_timer;
 	lc->last_update_timer = S390_lowcore.last_update_timer;
 	lc->last_update_clock = S390_lowcore.last_update_clock;
-
 	/*
 	 * Allocate the global restart stack which is the same for
-	 * all CPUs in cast *one* of them does a PSW restart.
+	 * all CPUs in case *one* of them does a PSW restart.
 	 */
-	restart_stack = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
-	if (!restart_stack)
-		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
-		      __func__, THREAD_SIZE, THREAD_SIZE);
-	restart_stack += STACK_INIT_OFFSET;
-
+	restart_stack = (void *)(stack_alloc_early() + STACK_INIT_OFFSET);
+	lc->mcck_stack = stack_alloc_early() + STACK_INIT_OFFSET;
+	lc->async_stack = stack_alloc_early() + STACK_INIT_OFFSET;
+	lc->nodat_stack = stack_alloc_early() + STACK_INIT_OFFSET;
+	lc->kernel_stack = S390_lowcore.kernel_stack;
 	/*
 	 * Set up PSW restart to call ipl.c:do_restart(). Copy the relevant
 	 * restart data to the absolute zero lowcore. This is necessary if
@@ -476,13 +456,6 @@ static void __init setup_lowcore(void)
 	lc->restart_data = 0;
 	lc->restart_source = -1U;
 	__ctl_store(lc->cregs_save_area, 0, 15);
-
-	mcck_stack = (unsigned long)memblock_alloc(THREAD_SIZE, THREAD_SIZE);
-	if (!mcck_stack)
-		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
-		      __func__, THREAD_SIZE, THREAD_SIZE);
-	lc->mcck_stack = mcck_stack + STACK_INIT_OFFSET;
-
 	lc->spinlock_lockval = arch_spin_lockval(0);
 	lc->spinlock_index = 0;
 	arch_spin_lock_setup(0);
@@ -635,7 +608,11 @@ static struct notifier_block kdump_mem_nb = {
  */
 static void __init reserve_pgtables(void)
 {
-	memblock_reserve(pgalloc_pos, pgalloc_end - pgalloc_pos);
+	unsigned long start, end;
+	struct reserved_range *range;
+
+	for_each_physmem_reserved_type_range(RR_VMEM, range, &start, &end)
+		memblock_reserve(start, end - start);
 }
 
 /*
@@ -712,13 +689,13 @@ static void __init reserve_crashkernel(void)
  */
 static void __init reserve_initrd(void)
 {
-#ifdef CONFIG_BLK_DEV_INITRD
-	if (!initrd_data.start || !initrd_data.size)
+	unsigned long addr, size;
+
+	if (!IS_ENABLED(CONFIG_BLK_DEV_INITRD) || !get_physmem_reserved(RR_INITRD, &addr, &size))
 		return;
-	initrd_start = (unsigned long)__va(initrd_data.start);
-	initrd_end = initrd_start + initrd_data.size;
-	memblock_reserve(initrd_data.start, initrd_data.size);
-#endif
+	initrd_start = (unsigned long)__va(addr);
+	initrd_end = initrd_start + size;
+	memblock_reserve(addr, size);
 }
 
 /*
@@ -730,72 +707,40 @@ static void __init reserve_certificate_list(void)
 		memblock_reserve(ipl_cert_list_addr, ipl_cert_list_size);
 }
 
-static void __init reserve_mem_detect_info(void)
+static void __init reserve_physmem_info(void)
 {
-	unsigned long start, size;
+	unsigned long addr, size;
 
-	get_mem_detect_reserved(&start, &size);
-	if (size)
-		memblock_reserve(start, size);
+	if (get_physmem_reserved(RR_MEM_DETECT_EXTENDED, &addr, &size))
+		memblock_reserve(addr, size);
 }
 
-static void __init free_mem_detect_info(void)
+static void __init free_physmem_info(void)
 {
-	unsigned long start, size;
+	unsigned long addr, size;
 
-	get_mem_detect_reserved(&start, &size);
-	if (size)
-		memblock_phys_free(start, size);
+	if (get_physmem_reserved(RR_MEM_DETECT_EXTENDED, &addr, &size))
+		memblock_phys_free(addr, size);
 }
 
-static const char * __init get_mem_info_source(void)
-{
-	switch (mem_detect.info_source) {
-	case MEM_DETECT_SCLP_STOR_INFO:
-		return "sclp storage info";
-	case MEM_DETECT_DIAG260:
-		return "diag260";
-	case MEM_DETECT_SCLP_READ_INFO:
-		return "sclp read info";
-	case MEM_DETECT_BIN_SEARCH:
-		return "binary search";
-	}
-	return "none";
-}
-
-static void __init memblock_add_mem_detect_info(void)
+static void __init memblock_add_physmem_info(void)
 {
 	unsigned long start, end;
 	int i;
 
 	pr_debug("physmem info source: %s (%hhd)\n",
-		 get_mem_info_source(), mem_detect.info_source);
+		 get_physmem_info_source(), physmem_info.info_source);
 	/* keep memblock lists close to the kernel */
 	memblock_set_bottom_up(true);
-	for_each_mem_detect_usable_block(i, &start, &end)
+	for_each_physmem_usable_range(i, &start, &end)
 		memblock_add(start, end - start);
-	for_each_mem_detect_block(i, &start, &end)
+	for_each_physmem_online_range(i, &start, &end)
 		memblock_physmem_add(start, end - start);
 	memblock_set_bottom_up(false);
 	memblock_set_node(0, ULONG_MAX, &memblock.memory, 0);
 }
 
 /*
- * Check for initrd being in usable memory
- */
-static void __init check_initrd(void)
-{
-#ifdef CONFIG_BLK_DEV_INITRD
-	if (initrd_data.start && initrd_data.size &&
-	    !memblock_is_region_memory(initrd_data.start, initrd_data.size)) {
-		pr_err("The initial RAM disk does not fit into the memory\n");
-		memblock_phys_free(initrd_data.start, initrd_data.size);
-		initrd_start = initrd_end = 0;
-	}
-#endif
-}
-
-/*
  * Reserve memory used for lowcore/command line/kernel image.
  */
 static void __init reserve_kernel(void)
@@ -803,7 +748,7 @@ static void __init reserve_kernel(void)
 	memblock_reserve(0, STARTUP_NORMAL_OFFSET);
 	memblock_reserve(OLDMEM_BASE, sizeof(unsigned long));
 	memblock_reserve(OLDMEM_SIZE, sizeof(unsigned long));
-	memblock_reserve(__amode31_base, __eamode31 - __samode31);
+	memblock_reserve(physmem_info.reserved[RR_AMODE31].start, __eamode31 - __samode31);
 	memblock_reserve(__pa(sclp_early_sccb), EXT_SCCB_READ_SCP);
 	memblock_reserve(__pa(_stext), _end - _stext);
 }
@@ -825,13 +770,13 @@ static void __init setup_memory(void)
 static void __init relocate_amode31_section(void)
 {
 	unsigned long amode31_size = __eamode31 - __samode31;
-	long amode31_offset = __amode31_base - __samode31;
+	long amode31_offset = physmem_info.reserved[RR_AMODE31].start - __samode31;
 	long *ptr;
 
 	pr_info("Relocating AMODE31 section of size 0x%08lx\n", amode31_size);
 
 	/* Move original AMODE31 section to the new one */
-	memmove((void *)__amode31_base, (void *)__samode31, amode31_size);
+	memmove((void *)physmem_info.reserved[RR_AMODE31].start, (void *)__samode31, amode31_size);
 	/* Zero out the old AMODE31 section to catch invalid accesses within it */
 	memset((void *)__samode31, 0, amode31_size);
 
@@ -997,14 +942,14 @@ void __init setup_arch(char **cmdline_p)
 	reserve_kernel();
 	reserve_initrd();
 	reserve_certificate_list();
-	reserve_mem_detect_info();
+	reserve_physmem_info();
 	memblock_set_current_limit(ident_map_size);
 	memblock_allow_resize();
 
 	/* Get information about *all* installed memory */
-	memblock_add_mem_detect_info();
+	memblock_add_physmem_info();
 
-	free_mem_detect_info();
+	free_physmem_info();
 	setup_memory_end();
 	memblock_dump_all();
 	setup_memory();
@@ -1017,7 +962,6 @@ void __init setup_arch(char **cmdline_p)
 	if (MACHINE_HAS_EDAT2)
 		hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
 
-	check_initrd();
 	reserve_crashkernel();
 #ifdef CONFIG_CRASH_DUMP
 	/*
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 70a84748f806..726de4f4df01 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -280,9 +280,8 @@ static void pcpu_attach_task(struct pcpu *pcpu, struct task_struct *tsk)
 
 	cpu = pcpu - pcpu_devices;
 	lc = lowcore_ptr[cpu];
-	lc->kernel_stack = (unsigned long) task_stack_page(tsk)
-		+ THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
-	lc->current_task = (unsigned long) tsk;
+	lc->kernel_stack = (unsigned long)task_stack_page(tsk) + STACK_INIT_OFFSET;
+	lc->current_task = (unsigned long)tsk;
 	lc->lpp = LPP_MAGIC;
 	lc->current_pid = tsk->pid;
 	lc->user_timer = tsk->thread.user_timer;
@@ -348,7 +347,6 @@ static void pcpu_delegate(struct pcpu *pcpu,
 		abs_lc->restart_source = source_cpu;
 		put_abs_lowcore(abs_lc);
 	}
-	__bpon();
 	asm volatile(
 		"0:	sigp	0,%0,%2	# sigp restart to target cpu\n"
 		"	brc	2,0b	# busy, try again\n"
@@ -986,7 +984,6 @@ void __cpu_die(unsigned int cpu)
 void __noreturn cpu_die(void)
 {
 	idle_task_exit();
-	__bpon();
 	pcpu_sigp_retry(pcpu_devices + smp_processor_id(), SIGP_STOP, 0);
 	for (;;) ;
 }
@@ -1302,9 +1299,9 @@ int __init smp_reinit_ipl_cpu(void)
 	local_mcck_enable();
 	local_irq_restore(flags);
 
-	free_pages(lc_ipl->async_stack - STACK_INIT_OFFSET, THREAD_SIZE_ORDER);
 	memblock_free_late(__pa(lc_ipl->mcck_stack - STACK_INIT_OFFSET), THREAD_SIZE);
+	memblock_free_late(__pa(lc_ipl->async_stack - STACK_INIT_OFFSET), THREAD_SIZE);
+	memblock_free_late(__pa(lc_ipl->nodat_stack - STACK_INIT_OFFSET), THREAD_SIZE);
 	memblock_free_late(__pa(lc_ipl), sizeof(*lc_ipl));
-
 	return 0;
 }
diff --git a/arch/s390/kernel/syscalls/syscall.tbl b/arch/s390/kernel/syscalls/syscall.tbl
index 799147658dee..b68f47541169 100644
--- a/arch/s390/kernel/syscalls/syscall.tbl
+++ b/arch/s390/kernel/syscalls/syscall.tbl
@@ -449,7 +449,7 @@
 444  common	landlock_create_ruleset	sys_landlock_create_ruleset	sys_landlock_create_ruleset
 445  common	landlock_add_rule	sys_landlock_add_rule		sys_landlock_add_rule
 446  common	landlock_restrict_self	sys_landlock_restrict_self	sys_landlock_restrict_self
-# 447 reserved for memfd_secret
+447  common	memfd_secret		sys_memfd_secret		sys_memfd_secret
 448  common	process_mrelease	sys_process_mrelease		sys_process_mrelease
 449  common	futex_waitv		sys_futex_waitv			sys_futex_waitv
 450  common	set_mempolicy_home_node	sys_set_mempolicy_home_node	sys_set_mempolicy_home_node
diff --git a/arch/s390/kernel/text_amode31.S b/arch/s390/kernel/text_amode31.S
index e0f01ce251f5..14c6d25c035f 100644
--- a/arch/s390/kernel/text_amode31.S
+++ b/arch/s390/kernel/text_amode31.S
@@ -27,7 +27,7 @@
 /*
  * int _diag14_amode31(unsigned long rx, unsigned long ry1, unsigned long subcode)
  */
-ENTRY(_diag14_amode31)
+SYM_FUNC_START(_diag14_amode31)
 	lgr	%r1,%r2
 	lgr	%r2,%r3
 	lgr	%r3,%r4
@@ -42,12 +42,12 @@ ENTRY(_diag14_amode31)
 	lgfr	%r2,%r5
 	BR_EX_AMODE31_r14
 	EX_TABLE_AMODE31(.Ldiag14_ex, .Ldiag14_fault)
-ENDPROC(_diag14_amode31)
+SYM_FUNC_END(_diag14_amode31)
 
 /*
  * int _diag210_amode31(struct diag210 *addr)
  */
-ENTRY(_diag210_amode31)
+SYM_FUNC_START(_diag210_amode31)
 	lgr	%r1,%r2
 	lhi	%r2,-1
 	sam31
@@ -60,12 +60,12 @@ ENTRY(_diag210_amode31)
 	lgfr	%r2,%r2
 	BR_EX_AMODE31_r14
 	EX_TABLE_AMODE31(.Ldiag210_ex, .Ldiag210_fault)
-ENDPROC(_diag210_amode31)
+SYM_FUNC_END(_diag210_amode31)
 
 /*
  * int diag8c(struct diag8c *addr, struct ccw_dev_id *devno, size_t len)
 */
-ENTRY(_diag8c_amode31)
+SYM_FUNC_START(_diag8c_amode31)
 	llgf	%r3,0(%r3)
 	sam31
 	diag	%r2,%r4,0x8c
@@ -74,11 +74,11 @@ ENTRY(_diag8c_amode31)
 	lgfr	%r2,%r3
 	BR_EX_AMODE31_r14
 	EX_TABLE_AMODE31(.Ldiag8c_ex, .Ldiag8c_ex)
-ENDPROC(_diag8c_amode31)
+SYM_FUNC_END(_diag8c_amode31)
 /*
  * int _diag26c_amode31(void *req, void *resp, enum diag26c_sc subcode)
  */
-ENTRY(_diag26c_amode31)
+SYM_FUNC_START(_diag26c_amode31)
 	lghi	%r5,-EOPNOTSUPP
 	sam31
 	diag	%r2,%r4,0x26c
@@ -87,42 +87,42 @@ ENTRY(_diag26c_amode31)
 	lgfr	%r2,%r5
 	BR_EX_AMODE31_r14
 	EX_TABLE_AMODE31(.Ldiag26c_ex, .Ldiag26c_ex)
-ENDPROC(_diag26c_amode31)
+SYM_FUNC_END(_diag26c_amode31)
 
 /*
  * void _diag0c_amode31(struct hypfs_diag0c_entry *entry)
  */
-ENTRY(_diag0c_amode31)
+SYM_FUNC_START(_diag0c_amode31)
 	sam31
 	diag	%r2,%r2,0x0c
 	sam64
 	BR_EX_AMODE31_r14
-ENDPROC(_diag0c_amode31)
+SYM_FUNC_END(_diag0c_amode31)
 
 /*
  * void _diag308_reset_amode31(void)
  *
  * Calls diag 308 subcode 1 and continues execution
  */
-ENTRY(_diag308_reset_amode31)
-	larl	%r4,.Lctlregs		# Save control registers
+SYM_FUNC_START(_diag308_reset_amode31)
+	larl	%r4,ctlregs		# Save control registers
 	stctg	%c0,%c15,0(%r4)
 	lg	%r2,0(%r4)		# Disable lowcore protection
 	nilh	%r2,0xefff
-	larl	%r4,.Lctlreg0
+	larl	%r4,ctlreg0
 	stg	%r2,0(%r4)
 	lctlg	%c0,%c0,0(%r4)
-	larl	%r4,.Lfpctl		# Floating point control register
+	larl	%r4,fpctl		# Floating point control register
 	stfpc	0(%r4)
-	larl	%r4,.Lprefix		# Save prefix register
+	larl	%r4,prefix		# Save prefix register
 	stpx	0(%r4)
-	larl	%r4,.Lprefix_zero	# Set prefix register to 0
+	larl	%r4,prefix_zero	# Set prefix register to 0
 	spx	0(%r4)
-	larl	%r4,.Lcontinue_psw	# Save PSW flags
+	larl	%r4,continue_psw	# Save PSW flags
 	epsw	%r2,%r3
 	stm	%r2,%r3,0(%r4)
 	larl	%r4,.Lrestart_part2	# Setup restart PSW at absolute 0
-	larl	%r3,.Lrestart_diag308_psw
+	larl	%r3,restart_diag308_psw
 	og	%r4,0(%r3)		# Save PSW
 	lghi	%r3,0
 	sturg	%r4,%r3			# Use sturg, because of large pages
@@ -134,39 +134,26 @@ ENTRY(_diag308_reset_amode31)
 	lhi	%r1,2			# Use mode 2 = ESAME (dump)
 	sigp	%r1,%r0,SIGP_SET_ARCHITECTURE	# Switch to ESAME mode
 	sam64				# Switch to 64 bit addressing mode
-	larl	%r4,.Lctlregs		# Restore control registers
+	larl	%r4,ctlregs		# Restore control registers
 	lctlg	%c0,%c15,0(%r4)
-	larl	%r4,.Lfpctl		# Restore floating point ctl register
+	larl	%r4,fpctl		# Restore floating point ctl register
 	lfpc	0(%r4)
-	larl	%r4,.Lprefix		# Restore prefix register
+	larl	%r4,prefix		# Restore prefix register
 	spx	0(%r4)
-	larl	%r4,.Lcontinue_psw	# Restore PSW flags
+	larl	%r4,continue_psw	# Restore PSW flags
 	larl	%r2,.Lcontinue
 	stg	%r2,8(%r4)
 	lpswe	0(%r4)
 .Lcontinue:
 	BR_EX_AMODE31_r14
-ENDPROC(_diag308_reset_amode31)
+SYM_FUNC_END(_diag308_reset_amode31)
 
 	.section .amode31.data,"aw",@progbits
-.align	8
-.Lrestart_diag308_psw:
-	.long	0x00080000,0x80000000
-
-.align 8
-.Lcontinue_psw:
-	.quad	0,0
-
-.align 8
-.Lctlreg0:
-	.quad	0
-.Lctlregs:
-	.rept	16
-	.quad	0
-	.endr
-.Lfpctl:
-	.long	0
-.Lprefix:
-	.long	0
-.Lprefix_zero:
-	.long	0
+	.balign	8
+SYM_DATA_LOCAL(restart_diag308_psw,	.long 0x00080000,0x80000000)
+SYM_DATA_LOCAL(continue_psw,		.quad 0,0)
+SYM_DATA_LOCAL(ctlreg0,			.quad 0)
+SYM_DATA_LOCAL(ctlregs,			.fill 16,8,0)
+SYM_DATA_LOCAL(fpctl,			.long 0)
+SYM_DATA_LOCAL(prefix,			.long 0)
+SYM_DATA_LOCAL(prefix_zero,		.long 0)
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 72af753d1bba..9fd19530c9a5 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -637,16 +637,6 @@ static struct ctl_table topology_ctl_table[] = {
 	{ },
 };
 
-static struct ctl_table topology_dir_table[] = {
-	{
-		.procname	= "s390",
-		.maxlen		= 0,
-		.mode		= 0555,
-		.child		= topology_ctl_table,
-	},
-	{ },
-};
-
 static int __init topology_init(void)
 {
 	struct device *dev_root;
@@ -657,7 +647,7 @@ static int __init topology_init(void)
 		set_topology_timer();
 	else
 		topology_update_polarization_simple();
-	register_sysctl_table(topology_dir_table);
+	register_sysctl("s390", topology_ctl_table);
 
 	dev_root = bus_get_dev_root(&cpu_subsys);
 	if (dev_root) {
diff --git a/arch/s390/kernel/vdso32/vdso_user_wrapper.S b/arch/s390/kernel/vdso32/vdso_user_wrapper.S
index 3f42f27f978c..2e645003fdaf 100644
--- a/arch/s390/kernel/vdso32/vdso_user_wrapper.S
+++ b/arch/s390/kernel/vdso32/vdso_user_wrapper.S
@@ -1,12 +1,13 @@
 /* SPDX-License-Identifier: GPL-2.0 */
 
+#include <linux/linkage.h>
 #include <asm/unistd.h>
 #include <asm/dwarf.h>
 
 .macro vdso_syscall func,syscall
 	.globl __kernel_compat_\func
 	.type  __kernel_compat_\func,@function
-	.align 8
+	__ALIGN
 __kernel_compat_\func:
 	CFI_STARTPROC
 	svc	\syscall
diff --git a/arch/s390/kernel/vdso64/vdso_user_wrapper.S b/arch/s390/kernel/vdso64/vdso_user_wrapper.S
index 97f0c0a669a5..57f62596e53b 100644
--- a/arch/s390/kernel/vdso64/vdso_user_wrapper.S
+++ b/arch/s390/kernel/vdso64/vdso_user_wrapper.S
@@ -1,4 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/linkage.h>
 #include <asm/vdso.h>
 #include <asm/unistd.h>
 #include <asm/asm-offsets.h>
@@ -16,7 +17,7 @@
 .macro vdso_func func
 	.globl __kernel_\func
 	.type  __kernel_\func,@function
-	.align 8
+	__ALIGN
 __kernel_\func:
 	CFI_STARTPROC
 	aghi	%r15,-WRAPPER_FRAME_SIZE
@@ -41,7 +42,7 @@ vdso_func getcpu
 .macro vdso_syscall func,syscall
 	.globl __kernel_\func
 	.type  __kernel_\func,@function
-	.align 8
+	__ALIGN
 __kernel_\func:
 	CFI_STARTPROC
 	svc	\syscall
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index b653ba8d51e6..2ae201ebf90b 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -14,6 +14,8 @@
 #define BSS_FIRST_SECTIONS *(.bss..swapper_pg_dir) \
 			   *(.bss..invalid_pg_dir)
 
+#define RO_EXCEPTION_TABLE_ALIGN	16
+
 /* Handle ro_after_init data on our own. */
 #define RO_AFTER_INIT_DATA
 
@@ -66,7 +68,6 @@ SECTIONS
 		 *(.data..ro_after_init)
 		JUMP_TABLE_DATA
 	} :data
-	EXCEPTION_TABLE(16)
 	. = ALIGN(PAGE_SIZE);
 	__end_ro_after_init = .;
 
@@ -219,6 +220,13 @@ SECTIONS
 		QUAD(init_mm)
 		QUAD(swapper_pg_dir)
 		QUAD(invalid_pg_dir)
+#ifdef CONFIG_KASAN
+		QUAD(kasan_early_shadow_page)
+		QUAD(kasan_early_shadow_pte)
+		QUAD(kasan_early_shadow_pmd)
+		QUAD(kasan_early_shadow_pud)
+		QUAD(kasan_early_shadow_p4d)
+#endif
 	} :NONE
 
 	/* Debugging sections.	*/
diff --git a/arch/s390/lib/mem.S b/arch/s390/lib/mem.S
index dc0874f2e203..5a9a55de2e10 100644
--- a/arch/s390/lib/mem.S
+++ b/arch/s390/lib/mem.S
@@ -14,8 +14,7 @@
 /*
  * void *memmove(void *dest, const void *src, size_t n)
  */
-WEAK(memmove)
-ENTRY(__memmove)
+SYM_FUNC_START(__memmove)
 	ltgr	%r4,%r4
 	lgr	%r1,%r2
 	jz	.Lmemmove_exit
@@ -48,7 +47,10 @@ ENTRY(__memmove)
 	BR_EX	%r14
 .Lmemmove_mvc:
 	mvc	0(1,%r1),0(%r3)
-ENDPROC(__memmove)
+SYM_FUNC_END(__memmove)
+EXPORT_SYMBOL(__memmove)
+
+SYM_FUNC_ALIAS(memmove, __memmove)
 EXPORT_SYMBOL(memmove)
 
 /*
@@ -66,8 +68,7 @@ EXPORT_SYMBOL(memmove)
  *	return __builtin_memset(s, c, n);
  * }
  */
-WEAK(memset)
-ENTRY(__memset)
+SYM_FUNC_START(__memset)
 	ltgr	%r4,%r4
 	jz	.Lmemset_exit
 	ltgr	%r3,%r3
@@ -111,7 +112,10 @@ ENTRY(__memset)
 	xc	0(1,%r1),0(%r1)
 .Lmemset_mvc:
 	mvc	1(1,%r1),0(%r1)
-ENDPROC(__memset)
+SYM_FUNC_END(__memset)
+EXPORT_SYMBOL(__memset)
+
+SYM_FUNC_ALIAS(memset, __memset)
 EXPORT_SYMBOL(memset)
 
 /*
@@ -119,8 +123,7 @@ EXPORT_SYMBOL(memset)
  *
  * void *memcpy(void *dest, const void *src, size_t n)
  */
-WEAK(memcpy)
-ENTRY(__memcpy)
+SYM_FUNC_START(__memcpy)
 	ltgr	%r4,%r4
 	jz	.Lmemcpy_exit
 	aghi	%r4,-1
@@ -141,7 +144,10 @@ ENTRY(__memcpy)
 	j	.Lmemcpy_remainder
 .Lmemcpy_mvc:
 	mvc	0(1,%r1),0(%r3)
-ENDPROC(__memcpy)
+SYM_FUNC_END(__memcpy)
+EXPORT_SYMBOL(__memcpy)
+
+SYM_FUNC_ALIAS(memcpy, __memcpy)
 EXPORT_SYMBOL(memcpy)
 
 /*
@@ -152,7 +158,7 @@ EXPORT_SYMBOL(memcpy)
  * void *__memset64(uint64_t *s, uint64_t v, size_t count)
  */
 .macro __MEMSET bits,bytes,insn
-ENTRY(__memset\bits)
+SYM_FUNC_START(__memset\bits)
 	ltgr	%r4,%r4
 	jz	.L__memset_exit\bits
 	cghi	%r4,\bytes
@@ -178,7 +184,7 @@ ENTRY(__memset\bits)
 	BR_EX	%r14
 .L__memset_mvc\bits:
 	mvc	\bytes(1,%r1),0(%r1)
-ENDPROC(__memset\bits)
+SYM_FUNC_END(__memset\bits)
 .endm
 
 __MEMSET 16,2,sth
diff --git a/arch/s390/lib/uaccess.c b/arch/s390/lib/uaccess.c
index d44214072779..e4a13d7cab6e 100644
--- a/arch/s390/lib/uaccess.c
+++ b/arch/s390/lib/uaccess.c
@@ -27,14 +27,13 @@ void debug_user_asce(int exit)
 	      "kernel: %016llx user: %016llx\n",
 	      exit ? "exit" : "entry", cr1, cr7,
 	      S390_lowcore.kernel_asce, S390_lowcore.user_asce);
-
 }
 #endif /*CONFIG_DEBUG_ENTRY */
 
 static unsigned long raw_copy_from_user_key(void *to, const void __user *from,
 					    unsigned long size, unsigned long key)
 {
-	unsigned long tmp1, tmp2;
+	unsigned long rem;
 	union oac spec = {
 		.oac2.key = key,
 		.oac2.as = PSW_BITS_AS_SECONDARY,
@@ -42,28 +41,30 @@ static unsigned long raw_copy_from_user_key(void *to, const void __user *from,
 		.oac2.a = 1,
 	};
 
-	tmp1 = -4096UL;
 	asm volatile(
-		"   lr	  0,%[spec]\n"
-		"0: mvcos 0(%2),0(%1),%0\n"
-		"6: jz    4f\n"
-		"1: algr  %0,%3\n"
-		"   slgr  %1,%3\n"
-		"   slgr  %2,%3\n"
-		"   j     0b\n"
-		"2: la    %4,4095(%1)\n"/* %4 = ptr + 4095 */
-		"   nr    %4,%3\n"	/* %4 = (ptr + 4095) & -4096 */
-		"   slgr  %4,%1\n"
-		"   clgr  %0,%4\n"	/* copy crosses next page boundary? */
-		"   jnh   5f\n"
-		"3: mvcos 0(%2),0(%1),%4\n"
-		"7: slgr  %0,%4\n"
-		"   j     5f\n"
-		"4: slgr  %0,%0\n"
-		"5:\n"
-		EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b)
-		: "+a" (size), "+a" (from), "+a" (to), "+a" (tmp1), "=a" (tmp2)
-		: [spec] "d" (spec.val)
+		"	lr	0,%[spec]\n"
+		"0:	mvcos	0(%[to]),0(%[from]),%[size]\n"
+		"1:	jz	5f\n"
+		"	algr	%[size],%[val]\n"
+		"	slgr	%[from],%[val]\n"
+		"	slgr	%[to],%[val]\n"
+		"	j	0b\n"
+		"2:	la	%[rem],4095(%[from])\n"	/* rem = from + 4095 */
+		"	nr	%[rem],%[val]\n"	/* rem = (from + 4095) & -4096 */
+		"	slgr	%[rem],%[from]\n"
+		"	clgr	%[size],%[rem]\n"	/* copy crosses next page boundary? */
+		"	jnh	6f\n"
+		"3:	mvcos	0(%[to]),0(%[from]),%[rem]\n"
+		"4:	slgr	%[size],%[rem]\n"
+		"	j	6f\n"
+		"5:	slgr	%[size],%[size]\n"
+		"6:\n"
+		EX_TABLE(0b, 2b)
+		EX_TABLE(1b, 2b)
+		EX_TABLE(3b, 6b)
+		EX_TABLE(4b, 6b)
+		: [size] "+&a" (size), [from] "+&a" (from), [to] "+&a" (to), [rem] "=&a" (rem)
+		: [val] "a" (-4096UL), [spec] "d" (spec.val)
 		: "cc", "memory", "0");
 	return size;
 }
@@ -94,7 +95,7 @@ EXPORT_SYMBOL(_copy_from_user_key);
 static unsigned long raw_copy_to_user_key(void __user *to, const void *from,
 					  unsigned long size, unsigned long key)
 {
-	unsigned long tmp1, tmp2;
+	unsigned long rem;
 	union oac spec = {
 		.oac1.key = key,
 		.oac1.as = PSW_BITS_AS_SECONDARY,
@@ -102,28 +103,30 @@ static unsigned long raw_copy_to_user_key(void __user *to, const void *from,
 		.oac1.a = 1,
 	};
 
-	tmp1 = -4096UL;
 	asm volatile(
-		"   lr	  0,%[spec]\n"
-		"0: mvcos 0(%1),0(%2),%0\n"
-		"6: jz    4f\n"
-		"1: algr  %0,%3\n"
-		"   slgr  %1,%3\n"
-		"   slgr  %2,%3\n"
-		"   j     0b\n"
-		"2: la    %4,4095(%1)\n"/* %4 = ptr + 4095 */
-		"   nr    %4,%3\n"	/* %4 = (ptr + 4095) & -4096 */
-		"   slgr  %4,%1\n"
-		"   clgr  %0,%4\n"	/* copy crosses next page boundary? */
-		"   jnh   5f\n"
-		"3: mvcos 0(%1),0(%2),%4\n"
-		"7: slgr  %0,%4\n"
-		"   j     5f\n"
-		"4: slgr  %0,%0\n"
-		"5:\n"
-		EX_TABLE(0b,2b) EX_TABLE(3b,5b) EX_TABLE(6b,2b) EX_TABLE(7b,5b)
-		: "+a" (size), "+a" (to), "+a" (from), "+a" (tmp1), "=a" (tmp2)
-		: [spec] "d" (spec.val)
+		"	lr	0,%[spec]\n"
+		"0:	mvcos	0(%[to]),0(%[from]),%[size]\n"
+		"1:	jz	5f\n"
+		"	algr	%[size],%[val]\n"
+		"	slgr	%[to],%[val]\n"
+		"	slgr	%[from],%[val]\n"
+		"	j	0b\n"
+		"2:	la	%[rem],4095(%[to])\n"	/* rem = to + 4095 */
+		"	nr	%[rem],%[val]\n"	/* rem = (to + 4095) & -4096 */
+		"	slgr	%[rem],%[to]\n"
+		"	clgr	%[size],%[rem]\n"	/* copy crosses next page boundary? */
+		"	jnh	6f\n"
+		"3:	mvcos	0(%[to]),0(%[from]),%[rem]\n"
+		"4:	slgr	%[size],%[rem]\n"
+		"	j	6f\n"
+		"5:	slgr	%[size],%[size]\n"
+		"6:\n"
+		EX_TABLE(0b, 2b)
+		EX_TABLE(1b, 2b)
+		EX_TABLE(3b, 6b)
+		EX_TABLE(4b, 6b)
+		: [size] "+&a" (size), [to] "+&a" (to), [from] "+&a" (from), [rem] "=&a" (rem)
+		: [val] "a" (-4096UL), [spec] "d" (spec.val)
 		: "cc", "memory", "0");
 	return size;
 }
@@ -147,33 +150,35 @@ EXPORT_SYMBOL(_copy_to_user_key);
 
 unsigned long __clear_user(void __user *to, unsigned long size)
 {
-	unsigned long tmp1, tmp2;
+	unsigned long rem;
 	union oac spec = {
 		.oac1.as = PSW_BITS_AS_SECONDARY,
 		.oac1.a = 1,
 	};
 
-	tmp1 = -4096UL;
 	asm volatile(
-		"   lr	  0,%[spec]\n"
-		"0: mvcos 0(%1),0(%4),%0\n"
-		"6: jz	  4f\n"
-		"1: algr  %0,%2\n"
-		"   slgr  %1,%2\n"
-		"   j	  0b\n"
-		"2: la	  %3,4095(%1)\n"/* %4 = to + 4095 */
-		"   nr	  %3,%2\n"	/* %4 = (to + 4095) & -4096 */
-		"   slgr  %3,%1\n"
-		"   clgr  %0,%3\n"	/* copy crosses next page boundary? */
-		"   jnh	  5f\n"
-		"3: mvcos 0(%1),0(%4),%3\n"
-		"7: slgr  %0,%3\n"
-		"   j	  5f\n"
-		"4: slgr  %0,%0\n"
-		"5:\n"
-		EX_TABLE(0b,2b) EX_TABLE(6b,2b) EX_TABLE(3b,5b) EX_TABLE(7b,5b)
-		: "+&a" (size), "+&a" (to), "+a" (tmp1), "=&a" (tmp2)
-		: "a" (empty_zero_page), [spec] "d" (spec.val)
+		"	lr	0,%[spec]\n"
+		"0:	mvcos	0(%[to]),0(%[zeropg]),%[size]\n"
+		"1:	jz	5f\n"
+		"	algr	%[size],%[val]\n"
+		"	slgr	%[to],%[val]\n"
+		"	j	0b\n"
+		"2:	la	%[rem],4095(%[to])\n"	/* rem = to + 4095 */
+		"	nr	%[rem],%[val]\n"	/* rem = (to + 4095) & -4096 */
+		"	slgr	%[rem],%[to]\n"
+		"	clgr	%[size],%[rem]\n"	/* copy crosses next page boundary? */
+		"	jnh	6f\n"
+		"3:	mvcos	0(%[to]),0(%[zeropg]),%[rem]\n"
+		"4:	slgr	%[size],%[rem]\n"
+		"	j	6f\n"
+		"5:	slgr	%[size],%[size]\n"
+		"6:\n"
+		EX_TABLE(0b, 2b)
+		EX_TABLE(1b, 2b)
+		EX_TABLE(3b, 6b)
+		EX_TABLE(4b, 6b)
+		: [size] "+&a" (size), [to] "+&a" (to), [rem] "=&a" (rem)
+		: [val] "a" (-4096UL), [zeropg] "a" (empty_zero_page), [spec] "d" (spec.val)
 		: "cc", "memory", "0");
 	return size;
 }
diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile
index 57e4f3a24829..d90db06a8af5 100644
--- a/arch/s390/mm/Makefile
+++ b/arch/s390/mm/Makefile
@@ -10,6 +10,3 @@ obj-$(CONFIG_CMM)		+= cmm.o
 obj-$(CONFIG_HUGETLB_PAGE)	+= hugetlbpage.o
 obj-$(CONFIG_PTDUMP_CORE)	+= dump_pagetables.o
 obj-$(CONFIG_PGSTE)		+= gmap.o
-
-KASAN_SANITIZE_kasan_init.o	:= n
-obj-$(CONFIG_KASAN)		+= kasan_init.o
diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c
index 9141ed4c52e9..5300c6867d5e 100644
--- a/arch/s390/mm/cmm.c
+++ b/arch/s390/mm/cmm.c
@@ -335,16 +335,6 @@ static struct ctl_table cmm_table[] = {
 	{ }
 };
 
-static struct ctl_table cmm_dir_table[] = {
-	{
-		.procname	= "vm",
-		.maxlen		= 0,
-		.mode		= 0555,
-		.child		= cmm_table,
-	},
-	{ }
-};
-
 #ifdef CONFIG_CMM_IUCV
 #define SMSG_PREFIX "CMM"
 static void cmm_smsg_target(const char *from, char *msg)
@@ -389,7 +379,7 @@ static int __init cmm_init(void)
 {
 	int rc = -ENOMEM;
 
-	cmm_sysctl_header = register_sysctl_table(cmm_dir_table);
+	cmm_sysctl_header = register_sysctl("vm", cmm_table);
 	if (!cmm_sysctl_header)
 		goto out_sysctl;
 #ifdef CONFIG_CMM_IUCV
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 144447d5cb4c..8d94e29adcdb 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -176,9 +176,8 @@ void __init mem_init(void)
 
 void free_initmem(void)
 {
-	__set_memory((unsigned long)_sinittext,
-		     (unsigned long)(_einittext - _sinittext) >> PAGE_SHIFT,
-		     SET_MEMORY_RW | SET_MEMORY_NX);
+	set_memory_rwnx((unsigned long)_sinittext,
+			(unsigned long)(_einittext - _sinittext) >> PAGE_SHIFT);
 	free_initmem_default(POISON_FREE_INITMEM);
 }
 
diff --git a/arch/s390/mm/kasan_init.c b/arch/s390/mm/kasan_init.c
deleted file mode 100644
index ef89a5f26853..000000000000
--- a/arch/s390/mm/kasan_init.c
+++ /dev/null
@@ -1,301 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/kasan.h>
-#include <linux/sched/task.h>
-#include <linux/pgtable.h>
-#include <asm/pgalloc.h>
-#include <asm/kasan.h>
-#include <asm/mem_detect.h>
-#include <asm/processor.h>
-#include <asm/sclp.h>
-#include <asm/facility.h>
-#include <asm/sections.h>
-#include <asm/setup.h>
-#include <asm/uv.h>
-
-static unsigned long segment_pos __initdata;
-static unsigned long segment_low __initdata;
-static bool has_edat __initdata;
-static bool has_nx __initdata;
-
-#define __sha(x) ((unsigned long)kasan_mem_to_shadow((void *)x))
-
-static void __init kasan_early_panic(const char *reason)
-{
-	sclp_early_printk("The Linux kernel failed to boot with the KernelAddressSanitizer:\n");
-	sclp_early_printk(reason);
-	disabled_wait();
-}
-
-static void * __init kasan_early_alloc_segment(void)
-{
-	segment_pos -= _SEGMENT_SIZE;
-
-	if (segment_pos < segment_low)
-		kasan_early_panic("out of memory during initialisation\n");
-
-	return __va(segment_pos);
-}
-
-static void * __init kasan_early_alloc_pages(unsigned int order)
-{
-	pgalloc_pos -= (PAGE_SIZE << order);
-
-	if (pgalloc_pos < pgalloc_low)
-		kasan_early_panic("out of memory during initialisation\n");
-
-	return __va(pgalloc_pos);
-}
-
-static void * __init kasan_early_crst_alloc(unsigned long val)
-{
-	unsigned long *table;
-
-	table = kasan_early_alloc_pages(CRST_ALLOC_ORDER);
-	if (table)
-		crst_table_init(table, val);
-	return table;
-}
-
-static pte_t * __init kasan_early_pte_alloc(void)
-{
-	static void *pte_leftover;
-	pte_t *pte;
-
-	BUILD_BUG_ON(_PAGE_TABLE_SIZE * 2 != PAGE_SIZE);
-
-	if (!pte_leftover) {
-		pte_leftover = kasan_early_alloc_pages(0);
-		pte = pte_leftover + _PAGE_TABLE_SIZE;
-	} else {
-		pte = pte_leftover;
-		pte_leftover = NULL;
-	}
-	memset64((u64 *)pte, _PAGE_INVALID, PTRS_PER_PTE);
-	return pte;
-}
-
-enum populate_mode {
-	POPULATE_MAP,
-	POPULATE_ZERO_SHADOW,
-	POPULATE_SHALLOW
-};
-
-static inline pgprot_t pgprot_clear_bit(pgprot_t pgprot, unsigned long bit)
-{
-	return __pgprot(pgprot_val(pgprot) & ~bit);
-}
-
-static void __init kasan_early_pgtable_populate(unsigned long address,
-						unsigned long end,
-						enum populate_mode mode)
-{
-	pgprot_t pgt_prot_zero = PAGE_KERNEL_RO;
-	pgprot_t pgt_prot = PAGE_KERNEL;
-	pgprot_t sgt_prot = SEGMENT_KERNEL;
-	pgd_t *pg_dir;
-	p4d_t *p4_dir;
-	pud_t *pu_dir;
-	pmd_t *pm_dir;
-	pte_t *pt_dir;
-	pmd_t pmd;
-	pte_t pte;
-
-	if (!has_nx) {
-		pgt_prot_zero = pgprot_clear_bit(pgt_prot_zero, _PAGE_NOEXEC);
-		pgt_prot = pgprot_clear_bit(pgt_prot, _PAGE_NOEXEC);
-		sgt_prot = pgprot_clear_bit(sgt_prot, _SEGMENT_ENTRY_NOEXEC);
-	}
-
-	while (address < end) {
-		pg_dir = pgd_offset_k(address);
-		if (pgd_none(*pg_dir)) {
-			if (mode == POPULATE_ZERO_SHADOW &&
-			    IS_ALIGNED(address, PGDIR_SIZE) &&
-			    end - address >= PGDIR_SIZE) {
-				pgd_populate(&init_mm, pg_dir,
-						kasan_early_shadow_p4d);
-				address = (address + PGDIR_SIZE) & PGDIR_MASK;
-				continue;
-			}
-			p4_dir = kasan_early_crst_alloc(_REGION2_ENTRY_EMPTY);
-			pgd_populate(&init_mm, pg_dir, p4_dir);
-		}
-
-		if (mode == POPULATE_SHALLOW) {
-			address = (address + P4D_SIZE) & P4D_MASK;
-			continue;
-		}
-
-		p4_dir = p4d_offset(pg_dir, address);
-		if (p4d_none(*p4_dir)) {
-			if (mode == POPULATE_ZERO_SHADOW &&
-			    IS_ALIGNED(address, P4D_SIZE) &&
-			    end - address >= P4D_SIZE) {
-				p4d_populate(&init_mm, p4_dir,
-						kasan_early_shadow_pud);
-				address = (address + P4D_SIZE) & P4D_MASK;
-				continue;
-			}
-			pu_dir = kasan_early_crst_alloc(_REGION3_ENTRY_EMPTY);
-			p4d_populate(&init_mm, p4_dir, pu_dir);
-		}
-
-		pu_dir = pud_offset(p4_dir, address);
-		if (pud_none(*pu_dir)) {
-			if (mode == POPULATE_ZERO_SHADOW &&
-			    IS_ALIGNED(address, PUD_SIZE) &&
-			    end - address >= PUD_SIZE) {
-				pud_populate(&init_mm, pu_dir,
-						kasan_early_shadow_pmd);
-				address = (address + PUD_SIZE) & PUD_MASK;
-				continue;
-			}
-			pm_dir = kasan_early_crst_alloc(_SEGMENT_ENTRY_EMPTY);
-			pud_populate(&init_mm, pu_dir, pm_dir);
-		}
-
-		pm_dir = pmd_offset(pu_dir, address);
-		if (pmd_none(*pm_dir)) {
-			if (IS_ALIGNED(address, PMD_SIZE) &&
-			    end - address >= PMD_SIZE) {
-				if (mode == POPULATE_ZERO_SHADOW) {
-					pmd_populate(&init_mm, pm_dir, kasan_early_shadow_pte);
-					address = (address + PMD_SIZE) & PMD_MASK;
-					continue;
-				} else if (has_edat) {
-					void *page = kasan_early_alloc_segment();
-
-					memset(page, 0, _SEGMENT_SIZE);
-					pmd = __pmd(__pa(page));
-					pmd = set_pmd_bit(pmd, sgt_prot);
-					set_pmd(pm_dir, pmd);
-					address = (address + PMD_SIZE) & PMD_MASK;
-					continue;
-				}
-			}
-			pt_dir = kasan_early_pte_alloc();
-			pmd_populate(&init_mm, pm_dir, pt_dir);
-		} else if (pmd_large(*pm_dir)) {
-			address = (address + PMD_SIZE) & PMD_MASK;
-			continue;
-		}
-
-		pt_dir = pte_offset_kernel(pm_dir, address);
-		if (pte_none(*pt_dir)) {
-			void *page;
-
-			switch (mode) {
-			case POPULATE_MAP:
-				page = kasan_early_alloc_pages(0);
-				memset(page, 0, PAGE_SIZE);
-				pte = __pte(__pa(page));
-				pte = set_pte_bit(pte, pgt_prot);
-				set_pte(pt_dir, pte);
-				break;
-			case POPULATE_ZERO_SHADOW:
-				page = kasan_early_shadow_page;
-				pte = __pte(__pa(page));
-				pte = set_pte_bit(pte, pgt_prot_zero);
-				set_pte(pt_dir, pte);
-				break;
-			case POPULATE_SHALLOW:
-				/* should never happen */
-				break;
-			}
-		}
-		address += PAGE_SIZE;
-	}
-}
-
-static void __init kasan_early_detect_facilities(void)
-{
-	if (test_facility(8)) {
-		has_edat = true;
-		__ctl_set_bit(0, 23);
-	}
-	if (!noexec_disabled && test_facility(130)) {
-		has_nx = true;
-		__ctl_set_bit(0, 20);
-	}
-}
-
-void __init kasan_early_init(void)
-{
-	pte_t pte_z = __pte(__pa(kasan_early_shadow_page) | pgprot_val(PAGE_KERNEL_RO));
-	pmd_t pmd_z = __pmd(__pa(kasan_early_shadow_pte) | _SEGMENT_ENTRY);
-	pud_t pud_z = __pud(__pa(kasan_early_shadow_pmd) | _REGION3_ENTRY);
-	p4d_t p4d_z = __p4d(__pa(kasan_early_shadow_pud) | _REGION2_ENTRY);
-	unsigned long untracked_end = MODULES_VADDR;
-	unsigned long shadow_alloc_size;
-	unsigned long start, end;
-	int i;
-
-	kasan_early_detect_facilities();
-	if (!has_nx)
-		pte_z = clear_pte_bit(pte_z, __pgprot(_PAGE_NOEXEC));
-
-	BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_START, P4D_SIZE));
-	BUILD_BUG_ON(!IS_ALIGNED(KASAN_SHADOW_END, P4D_SIZE));
-
-	/* init kasan zero shadow */
-	crst_table_init((unsigned long *)kasan_early_shadow_p4d, p4d_val(p4d_z));
-	crst_table_init((unsigned long *)kasan_early_shadow_pud, pud_val(pud_z));
-	crst_table_init((unsigned long *)kasan_early_shadow_pmd, pmd_val(pmd_z));
-	memset64((u64 *)kasan_early_shadow_pte, pte_val(pte_z), PTRS_PER_PTE);
-
-	if (has_edat) {
-		shadow_alloc_size = get_mem_detect_usable_total() >> KASAN_SHADOW_SCALE_SHIFT;
-		segment_pos = round_down(pgalloc_pos, _SEGMENT_SIZE);
-		segment_low = segment_pos - shadow_alloc_size;
-		segment_low = round_down(segment_low, _SEGMENT_SIZE);
-		pgalloc_pos = segment_low;
-	}
-	/*
-	 * Current memory layout:
-	 * +- 0 -------------+	       +- shadow start -+
-	 * |1:1 ident mapping|	      /|1/8 of ident map|
-	 * |		     |	     / |		|
-	 * +-end of ident map+	    /  +----------------+
-	 * | ... gap ...     |	   /   |    kasan	|
-	 * |		     |	  /    |  zero page	|
-	 * +- vmalloc area  -+	 /     |   mapping	|
-	 * | vmalloc_size    |	/      | (untracked)	|
-	 * +- modules vaddr -+ /       +----------------+
-	 * | 2Gb	     |/        |    unmapped	| allocated per module
-	 * +- shadow start  -+	       +----------------+
-	 * | 1/8 addr space  |	       | zero pg mapping| (untracked)
-	 * +- shadow end ----+---------+- shadow end ---+
-	 *
-	 * Current memory layout (KASAN_VMALLOC):
-	 * +- 0 -------------+	       +- shadow start -+
-	 * |1:1 ident mapping|	      /|1/8 of ident map|
-	 * |		     |	     / |		|
-	 * +-end of ident map+	    /  +----------------+
-	 * | ... gap ...     |	   /   | kasan zero page| (untracked)
-	 * |		     |	  /    | mapping	|
-	 * +- vmalloc area  -+	 /     +----------------+
-	 * | vmalloc_size    |	/      |shallow populate|
-	 * +- modules vaddr -+ /       +----------------+
-	 * | 2Gb	     |/        |shallow populate|
-	 * +- shadow start  -+	       +----------------+
-	 * | 1/8 addr space  |	       | zero pg mapping| (untracked)
-	 * +- shadow end ----+---------+- shadow end ---+
-	 */
-	/* populate kasan shadow (for identity mapping and zero page mapping) */
-	for_each_mem_detect_usable_block(i, &start, &end)
-		kasan_early_pgtable_populate(__sha(start), __sha(end), POPULATE_MAP);
-	if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
-		untracked_end = VMALLOC_START;
-		/* shallowly populate kasan shadow for vmalloc and modules */
-		kasan_early_pgtable_populate(__sha(VMALLOC_START), __sha(MODULES_END),
-					     POPULATE_SHALLOW);
-	}
-	/* populate kasan shadow for untracked memory */
-	kasan_early_pgtable_populate(__sha(ident_map_size), __sha(untracked_end),
-				     POPULATE_ZERO_SHADOW);
-	kasan_early_pgtable_populate(__sha(MODULES_END), __sha(_REGION1_SIZE),
-				     POPULATE_ZERO_SHADOW);
-	/* enable kasan */
-	init_task.kasan_depth = 0;
-	sclp_early_printk("KernelAddressSanitizer initialized\n");
-}
diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c
index 85195c18b2e8..5ba3bd8a7b12 100644
--- a/arch/s390/mm/pageattr.c
+++ b/arch/s390/mm/pageattr.c
@@ -4,6 +4,7 @@
  * Author(s): Jan Glauber <jang@linux.vnet.ibm.com>
  */
 #include <linux/hugetlb.h>
+#include <linux/vmalloc.h>
 #include <linux/mm.h>
 #include <asm/cacheflush.h>
 #include <asm/facility.h>
@@ -41,7 +42,7 @@ void __storage_key_init_range(unsigned long start, unsigned long end)
 }
 
 #ifdef CONFIG_PROC_FS
-atomic_long_t direct_pages_count[PG_DIRECT_MAP_MAX];
+atomic_long_t __bootdata_preserved(direct_pages_count[PG_DIRECT_MAP_MAX]);
 
 void arch_report_meminfo(struct seq_file *m)
 {
@@ -101,6 +102,14 @@ static int walk_pte_level(pmd_t *pmdp, unsigned long addr, unsigned long end,
 			new = set_pte_bit(new, __pgprot(_PAGE_NOEXEC));
 		else if (flags & SET_MEMORY_X)
 			new = clear_pte_bit(new, __pgprot(_PAGE_NOEXEC));
+		if (flags & SET_MEMORY_INV) {
+			new = set_pte_bit(new, __pgprot(_PAGE_INVALID));
+		} else if (flags & SET_MEMORY_DEF) {
+			new = __pte(pte_val(new) & PAGE_MASK);
+			new = set_pte_bit(new, PAGE_KERNEL);
+			if (!MACHINE_HAS_NX)
+				new = clear_pte_bit(new, __pgprot(_PAGE_NOEXEC));
+		}
 		pgt_set((unsigned long *)ptep, pte_val(new), addr, CRDTE_DTT_PAGE);
 		ptep++;
 		addr += PAGE_SIZE;
@@ -151,6 +160,14 @@ static void modify_pmd_page(pmd_t *pmdp, unsigned long addr,
 		new = set_pmd_bit(new, __pgprot(_SEGMENT_ENTRY_NOEXEC));
 	else if (flags & SET_MEMORY_X)
 		new = clear_pmd_bit(new, __pgprot(_SEGMENT_ENTRY_NOEXEC));
+	if (flags & SET_MEMORY_INV) {
+		new = set_pmd_bit(new, __pgprot(_SEGMENT_ENTRY_INVALID));
+	} else if (flags & SET_MEMORY_DEF) {
+		new = __pmd(pmd_val(new) & PMD_MASK);
+		new = set_pmd_bit(new, SEGMENT_KERNEL);
+		if (!MACHINE_HAS_NX)
+			new = clear_pmd_bit(new, __pgprot(_SEGMENT_ENTRY_NOEXEC));
+	}
 	pgt_set((unsigned long *)pmdp, pmd_val(new), addr, CRDTE_DTT_SEGMENT);
 }
 
@@ -232,6 +249,14 @@ static void modify_pud_page(pud_t *pudp, unsigned long addr,
 		new = set_pud_bit(new, __pgprot(_REGION_ENTRY_NOEXEC));
 	else if (flags & SET_MEMORY_X)
 		new = clear_pud_bit(new, __pgprot(_REGION_ENTRY_NOEXEC));
+	if (flags & SET_MEMORY_INV) {
+		new = set_pud_bit(new, __pgprot(_REGION_ENTRY_INVALID));
+	} else if (flags & SET_MEMORY_DEF) {
+		new = __pud(pud_val(new) & PUD_MASK);
+		new = set_pud_bit(new, REGION3_KERNEL);
+		if (!MACHINE_HAS_NX)
+			new = clear_pud_bit(new, __pgprot(_REGION_ENTRY_NOEXEC));
+	}
 	pgt_set((unsigned long *)pudp, pud_val(new), addr, CRDTE_DTT_REGION3);
 }
 
@@ -298,11 +323,6 @@ static int change_page_attr(unsigned long addr, unsigned long end,
 	int rc = -EINVAL;
 	pgd_t *pgdp;
 
-	if (addr == end)
-		return 0;
-	if (end >= MODULES_END)
-		return -EINVAL;
-	mutex_lock(&cpa_mutex);
 	pgdp = pgd_offset_k(addr);
 	do {
 		if (pgd_none(*pgdp))
@@ -313,18 +333,76 @@ static int change_page_attr(unsigned long addr, unsigned long end,
 			break;
 		cond_resched();
 	} while (pgdp++, addr = next, addr < end && !rc);
-	mutex_unlock(&cpa_mutex);
+	return rc;
+}
+
+static int change_page_attr_alias(unsigned long addr, unsigned long end,
+				  unsigned long flags)
+{
+	unsigned long alias, offset, va_start, va_end;
+	struct vm_struct *area;
+	int rc = 0;
+
+	/*
+	 * Changes to read-only permissions on kernel VA mappings are also
+	 * applied to the kernel direct mapping. Execute permissions are
+	 * intentionally not transferred to keep all allocated pages within
+	 * the direct mapping non-executable.
+	 */
+	flags &= SET_MEMORY_RO | SET_MEMORY_RW;
+	if (!flags)
+		return 0;
+	area = NULL;
+	while (addr < end) {
+		if (!area)
+			area = find_vm_area((void *)addr);
+		if (!area || !(area->flags & VM_ALLOC))
+			return 0;
+		va_start = (unsigned long)area->addr;
+		va_end = va_start + area->nr_pages * PAGE_SIZE;
+		offset = (addr - va_start) >> PAGE_SHIFT;
+		alias = (unsigned long)page_address(area->pages[offset]);
+		rc = change_page_attr(alias, alias + PAGE_SIZE, flags);
+		if (rc)
+			break;
+		addr += PAGE_SIZE;
+		if (addr >= va_end)
+			area = NULL;
+	}
 	return rc;
 }
 
 int __set_memory(unsigned long addr, int numpages, unsigned long flags)
 {
+	unsigned long end;
+	int rc;
+
 	if (!MACHINE_HAS_NX)
 		flags &= ~(SET_MEMORY_NX | SET_MEMORY_X);
 	if (!flags)
 		return 0;
+	if (!numpages)
+		return 0;
 	addr &= PAGE_MASK;
-	return change_page_attr(addr, addr + numpages * PAGE_SIZE, flags);
+	end = addr + numpages * PAGE_SIZE;
+	mutex_lock(&cpa_mutex);
+	rc = change_page_attr(addr, end, flags);
+	if (rc)
+		goto out;
+	rc = change_page_attr_alias(addr, end, flags);
+out:
+	mutex_unlock(&cpa_mutex);
+	return rc;
+}
+
+int set_direct_map_invalid_noflush(struct page *page)
+{
+	return __set_memory((unsigned long)page_to_virt(page), 1, SET_MEMORY_INV);
+}
+
+int set_direct_map_default_noflush(struct page *page)
+{
+	return __set_memory((unsigned long)page_to_virt(page), 1, SET_MEMORY_DEF);
 }
 
 #if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KFENCE)
diff --git a/arch/s390/mm/pgalloc.c b/arch/s390/mm/pgalloc.c
index 2de48b2c1b04..66ab68db9842 100644
--- a/arch/s390/mm/pgalloc.c
+++ b/arch/s390/mm/pgalloc.c
@@ -33,19 +33,9 @@ static struct ctl_table page_table_sysctl[] = {
 	{ }
 };
 
-static struct ctl_table page_table_sysctl_dir[] = {
-	{
-		.procname	= "vm",
-		.maxlen		= 0,
-		.mode		= 0555,
-		.child		= page_table_sysctl,
-	},
-	{ }
-};
-
 static int __init page_table_register_sysctl(void)
 {
-	return register_sysctl_table(page_table_sysctl_dir) ? 0 : -ENOMEM;
+	return register_sysctl("vm", page_table_sysctl) ? 0 : -ENOMEM;
 }
 __initcall(page_table_register_sysctl);
 
@@ -143,13 +133,7 @@ err_p4d:
 
 static inline unsigned int atomic_xor_bits(atomic_t *v, unsigned int bits)
 {
-	unsigned int old, new;
-
-	do {
-		old = atomic_read(v);
-		new = old ^ bits;
-	} while (atomic_cmpxchg(v, old, new) != old);
-	return new;
+	return atomic_fetch_xor(bits, v) ^ bits;
 }
 
 #ifdef CONFIG_PGSTE
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 4113a7ffa149..5b22c6e24528 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -5,6 +5,7 @@
 
 #include <linux/memory_hotplug.h>
 #include <linux/memblock.h>
+#include <linux/kasan.h>
 #include <linux/pfn.h>
 #include <linux/mm.h>
 #include <linux/init.h>
@@ -664,6 +665,9 @@ static void __init memblock_region_swap(void *a, void *b, int size)
 	swap(*(struct memblock_region *)a, *(struct memblock_region *)b);
 }
 
+#ifdef CONFIG_KASAN
+#define __sha(x)	((unsigned long)kasan_mem_to_shadow((void *)x))
+#endif
 /*
  * map whole physical memory to virtual memory (identity mapping)
  * we reserve enough space in the vmalloc area for vmemmap to hotplug
@@ -728,23 +732,24 @@ void __init vmem_map_init(void)
 	     memblock_region_cmp, memblock_region_swap);
 	__for_each_mem_range(i, &memblock.memory, &memory_rwx,
 			     NUMA_NO_NODE, MEMBLOCK_NONE, &base, &end, NULL) {
-		__set_memory((unsigned long)__va(base),
-			     (end - base) >> PAGE_SHIFT,
-			     SET_MEMORY_RW | SET_MEMORY_NX);
+		set_memory_rwnx((unsigned long)__va(base),
+				(end - base) >> PAGE_SHIFT);
 	}
 
-	__set_memory((unsigned long)_stext,
-		     (unsigned long)(_etext - _stext) >> PAGE_SHIFT,
-		     SET_MEMORY_RO | SET_MEMORY_X);
-	__set_memory((unsigned long)_etext,
-		     (unsigned long)(__end_rodata - _etext) >> PAGE_SHIFT,
-		     SET_MEMORY_RO);
-	__set_memory((unsigned long)_sinittext,
-		     (unsigned long)(_einittext - _sinittext) >> PAGE_SHIFT,
-		     SET_MEMORY_RO | SET_MEMORY_X);
-	__set_memory(__stext_amode31,
-		     (__etext_amode31 - __stext_amode31) >> PAGE_SHIFT,
-		     SET_MEMORY_RO | SET_MEMORY_X);
+#ifdef CONFIG_KASAN
+	for_each_mem_range(i, &base, &end) {
+		set_memory_rwnx(__sha(base),
+				(__sha(end) - __sha(base)) >> PAGE_SHIFT);
+	}
+#endif
+	set_memory_rox((unsigned long)_stext,
+		       (unsigned long)(_etext - _stext) >> PAGE_SHIFT);
+	set_memory_ro((unsigned long)_etext,
+		      (unsigned long)(__end_rodata - _etext) >> PAGE_SHIFT);
+	set_memory_rox((unsigned long)_sinittext,
+		       (unsigned long)(_einittext - _sinittext) >> PAGE_SHIFT);
+	set_memory_rox(__stext_amode31,
+		       (__etext_amode31 - __stext_amode31) >> PAGE_SHIFT);
 
 	/* lowcore must be executable for LPSWE */
 	if (static_key_enabled(&cpu_has_bear))
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index e16afacc8fd1..afc3f33788da 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -874,32 +874,15 @@ bool zpci_is_device_configured(struct zpci_dev *zdev)
  * @fh: The general function handle supplied by the platform
  *
  * Given a device in the configuration state Configured, enables, scans and
- * adds it to the common code PCI subsystem if possible. If the PCI device is
- * parked because we can not yet create a PCI bus because we have not seen
- * function 0, it is ignored but will be scanned once function 0 appears.
- * If any failure occurs, the zpci_dev is left disabled.
+ * adds it to the common code PCI subsystem if possible. If any failure occurs,
+ * the zpci_dev is left disabled.
  *
  * Return: 0 on success, or an error code otherwise
  */
 int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh)
 {
-	int rc;
-
 	zpci_update_fh(zdev, fh);
-	/* the PCI function will be scanned once function 0 appears */
-	if (!zdev->zbus->bus)
-		return 0;
-
-	/* For function 0 on a multi-function bus scan whole bus as we might
-	 * have to pick up existing functions waiting for it to allow creating
-	 * the PCI bus
-	 */
-	if (zdev->devfn == 0 && zdev->zbus->multifunction)
-		rc = zpci_bus_scan_bus(zdev->zbus);
-	else
-		rc = zpci_bus_scan_device(zdev);
-
-	return rc;
+	return zpci_bus_scan_device(zdev);
 }
 
 /**
diff --git a/arch/s390/pci/pci_bus.c b/arch/s390/pci/pci_bus.c
index a99926af2b69..32245b970a0c 100644
--- a/arch/s390/pci/pci_bus.c
+++ b/arch/s390/pci/pci_bus.c
@@ -85,9 +85,8 @@ int zpci_bus_scan_device(struct zpci_dev *zdev)
 	if (!pdev)
 		return -ENODEV;
 
-	pci_bus_add_device(pdev);
 	pci_lock_rescan_remove();
-	pci_bus_add_devices(zdev->zbus->bus);
+	pci_bus_add_device(pdev);
 	pci_unlock_rescan_remove();
 
 	return 0;
@@ -130,11 +129,8 @@ void zpci_bus_remove_device(struct zpci_dev *zdev, bool set_error)
  * @zbus: the zbus to be scanned
  *
  * Enables and scans all PCI functions on the bus making them available to the
- * common PCI code. If there is no function 0 on the zbus nothing is scanned. If
- * a function does not have a slot yet because it was added to the zbus before
- * function 0 the slot is created. If a PCI function fails to be initialized
- * an error will be returned but attempts will still be made for all other
- * functions on the bus.
+ * common PCI code. If a PCI function fails to be initialized an error will be
+ * returned but attempts will still be made for all other functions on the bus.
  *
  * Return: 0 on success, an error value otherwise
  */
@@ -211,7 +207,6 @@ static int zpci_bus_create_pci_bus(struct zpci_bus *zbus, struct zpci_dev *fr, s
 	}
 
 	zbus->bus = bus;
-	pci_bus_add_devices(bus);
 
 	return 0;
 }
diff --git a/arch/s390/purgatory/head.S b/arch/s390/purgatory/head.S
index 6f835124ee82..e5bd1a503528 100644
--- a/arch/s390/purgatory/head.S
+++ b/arch/s390/purgatory/head.S
@@ -76,9 +76,9 @@
 	diag	%r0,%r1,0x308
 .endm
 
-.text
-.align PAGE_SIZE
-ENTRY(purgatory_start)
+	.text
+	.balign PAGE_SIZE
+SYM_CODE_START(purgatory_start)
 	/* The purgatory might be called after a diag308 so better set
 	 * architecture and addressing mode.
 	 */
@@ -245,45 +245,21 @@ ENTRY(purgatory_start)
 
 	/* start crash kernel */
 	START_NEXT_KERNEL .base_dst 1
-
-
-load_psw_mask:
-	.long	0x00080000,0x80000000
-
-	.align	8
-disabled_wait_psw:
-	.quad	0x0002000180000000
-	.quad	0x0000000000000000 + .do_checksum_verification
-
-gprregs:
-	.rept	10
-	.quad	0
-	.endr
-
-/* Macro to define a global variable with name and size (in bytes) to be
- * shared with C code.
- *
- * Add the .size and .type attribute to satisfy checks on the Elf_Sym during
- * purgatory load.
- */
-.macro GLOBAL_VARIABLE name,size
-\name:
-	.global \name
-	.size	\name,\size
-	.type	\name,object
-	.skip	\size,0
-.endm
-
-GLOBAL_VARIABLE purgatory_sha256_digest,32
-GLOBAL_VARIABLE purgatory_sha_regions,16*__KEXEC_SHA_REGION_SIZE
-GLOBAL_VARIABLE kernel_entry,8
-GLOBAL_VARIABLE kernel_type,8
-GLOBAL_VARIABLE crash_start,8
-GLOBAL_VARIABLE crash_size,8
-
-	.align	PAGE_SIZE
-stack:
+SYM_CODE_END(purgatory_start)
+
+SYM_DATA_LOCAL(load_psw_mask,		.long 0x00080000,0x80000000)
+	.balign	8
+SYM_DATA_LOCAL(disabled_wait_psw,	.quad 0x0002000180000000,.do_checksum_verification)
+SYM_DATA_LOCAL(gprregs,			.fill 10,8,0)
+SYM_DATA(purgatory_sha256_digest,	.skip 32)
+SYM_DATA(purgatory_sha_regions,		.skip 16*__KEXEC_SHA_REGION_SIZE)
+SYM_DATA(kernel_entry,			.skip 8)
+SYM_DATA(kernel_type,			.skip 8)
+SYM_DATA(crash_start,			.skip 8)
+SYM_DATA(crash_size,			.skip 8)
+	.balign	PAGE_SIZE
+SYM_DATA_START_LOCAL(stack)
 	/* The buffer to move this code must be as big as the code. */
 	.skip	stack-purgatory_start
-	.align	PAGE_SIZE
-purgatory_end:
+	.balign	PAGE_SIZE
+SYM_DATA_END_LABEL(stack, SYM_L_LOCAL, purgatory_end)
diff --git a/arch/s390/purgatory/kexec-purgatory.S b/arch/s390/purgatory/kexec-purgatory.S
index 8293753100ae..25f512b1de12 100644
--- a/arch/s390/purgatory/kexec-purgatory.S
+++ b/arch/s390/purgatory/kexec-purgatory.S
@@ -1,14 +1,12 @@
 /* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/linkage.h>
 
 	.section .rodata, "a"
 
-	.align	8
-kexec_purgatory:
-	.globl	kexec_purgatory
+	.balign	8
+SYM_DATA_START(kexec_purgatory)
 	.incbin	"arch/s390/purgatory/purgatory.ro"
-.Lkexec_purgatroy_end:
+SYM_DATA_END_LABEL(kexec_purgatory, SYM_L_LOCAL, kexec_purgatory_end)
 
-	.align	8
-kexec_purgatory_size:
-	.globl	kexec_purgatory_size
-	.quad	.Lkexec_purgatroy_end - kexec_purgatory
+	.balign	8
+SYM_DATA(kexec_purgatory_size, .quad kexec_purgatory_end-kexec_purgatory)
author	Linus Torvalds <torvalds@linux-foundation.org>	2023-04-30 20:43:31 +0200
committer	Linus Torvalds <torvalds@linux-foundation.org>	2023-04-30 20:43:31 +0200
commit	10de638d8ea57ebab4231ea077bed01d9bade775 (patch)
tree	f9de1b131e1a94c1cbe051e55cda1ba9b9418ee9 /arch/s390
parent	Merge tag 'kbuild-v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masa... (diff)
parent	s390/stackleak: provide fast __stackleak_poison() implementation (diff)
download	linux-10de638d8ea57ebab4231ea077bed01d9bade775.tar.xz linux-10de638d8ea57ebab4231ea077bed01d9bade775.zip