Merge branch 'parisc-4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

Pull parisc updates from Helge Deller:
 "Highlights:

   - one important fix from Dave to prevent kernel crash when userspace
     hands over invalid values to our in-kernel CAS implementation.

   - added CPU topology support, including multi-core scheduler support
     on PA8900 CPUs

  Minor changes:

   - minor fixes for sparse (from Luc)

   - drop duplicates for CPU_BIG_ENDIAN from parisc and sparc top
     Kconfig files (from Babu)

   - reorganized parisc PDC (firmware-access) header files for usage
     from userspace. Required for upcoming qemu parisc emulator and
     SeaBIOS fork to support parisc"

* 'parisc-4.15-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  arch: Fix duplicates in Kconfig for parisc and sparc
  parisc: Make some PDC structures accessible in uapi headers
  parisc: Pass endianness info to sparse
  parisc: Add CPU topology support
  parisc: Fix validity check of pointer size argument in new CAS implementation

10 files changed, 452 insertions, 294 deletions

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 1fd3eb5b66c6..9792d8cf4f56 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -32,6 +32,7 @@ config PARISC
 	select GENERIC_PCI_IOMAP
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_SMP_IDLE_THREAD
+	select GENERIC_CPU_DEVICES
 	select GENERIC_STRNCPY_FROM_USER
 	select SYSCTL_ARCH_UNALIGN_ALLOW
 	select SYSCTL_EXCEPTION_TRACE
@@ -60,9 +61,6 @@ config PARISC
 config CPU_BIG_ENDIAN
 	def_bool y
 
-config CPU_BIG_ENDIAN
-	def_bool y
-
 config MMU
 	def_bool y
 
@@ -288,6 +286,21 @@ config SMP
 
 	  If you don't know what to do here, say N.
 
+config PARISC_CPU_TOPOLOGY
+	bool "Support cpu topology definition"
+	depends on SMP
+	default y
+	help
+	  Support PARISC cpu topology definition.
+
+config SCHED_MC
+	bool "Multi-core scheduler support"
+	depends on PARISC_CPU_TOPOLOGY && PA8X00
+	help
+	  Multi-core scheduler support improves the CPU scheduler's decision
+	  making when dealing with multi-core CPU chips at a cost of slightly
+	  increased overhead in some places. If unsure say N here.
+
 config IRQSTACKS
 	bool "Use separate kernel stacks when processing interrupts"
 	default y
diff --git a/arch/parisc/Makefile b/arch/parisc/Makefile
index 01946ebaff72..e2364ff59180 100644
--- a/arch/parisc/Makefile
+++ b/arch/parisc/Makefile
@@ -22,7 +22,7 @@ KBUILD_IMAGE := vmlinuz
 KBUILD_DEFCONFIG := default_defconfig
 
 NM		= sh $(srctree)/arch/parisc/nm
-CHECKFLAGS	+= -D__hppa__=1
+CHECKFLAGS	+= -D__hppa__=1 -mbig-endian
 LIBGCC		= $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
 export LIBGCC
 
diff --git a/arch/parisc/include/asm/pdc.h b/arch/parisc/include/asm/pdc.h
index efee44a5e063..339e83ddb39e 100644
--- a/arch/parisc/include/asm/pdc.h
+++ b/arch/parisc/include/asm/pdc.h
@@ -18,261 +18,6 @@ extern unsigned long parisc_cell_loc; /* cell location of CPU (PAT)	   */
 #define PDC_TYPE_SYSTEM_MAP	 1 /* 32-bit, but supports PDC_SYSTEM_MAP */
 #define PDC_TYPE_SNAKE		 2 /* Doesn't support SYSTEM_MAP */
 
-struct pdc_chassis_info {       /* for PDC_CHASSIS_INFO */
-	unsigned long actcnt;   /* actual number of bytes returned */
-	unsigned long maxcnt;   /* maximum number of bytes that could be returned */
-};
-
-struct pdc_coproc_cfg {         /* for PDC_COPROC_CFG */
-        unsigned long ccr_functional;
-        unsigned long ccr_present;
-        unsigned long revision;
-        unsigned long model;
-};
-
-struct pdc_model {		/* for PDC_MODEL */
-	unsigned long hversion;
-	unsigned long sversion;
-	unsigned long hw_id;
-	unsigned long boot_id;
-	unsigned long sw_id;
-	unsigned long sw_cap;
-	unsigned long arch_rev;
-	unsigned long pot_key;
-	unsigned long curr_key;
-};
-
-struct pdc_cache_cf {		/* for PDC_CACHE  (I/D-caches) */
-    unsigned long
-#ifdef CONFIG_64BIT
-		cc_padW:32,
-#endif
-		cc_alias: 4,	/* alias boundaries for virtual addresses   */
-		cc_block: 4,	/* to determine most efficient stride */
-		cc_line	: 3,	/* maximum amount written back as a result of store (multiple of 16 bytes) */
-		cc_shift: 2,	/* how much to shift cc_block left */
-		cc_wt	: 1,	/* 0 = WT-Dcache, 1 = WB-Dcache */
-		cc_sh	: 2,	/* 0 = separate I/D-cache, else shared I/D-cache */
-		cc_cst  : 3,	/* 0 = incoherent D-cache, 1=coherent D-cache */
-		cc_pad1 : 10,	/* reserved */
-		cc_hv   : 3;	/* hversion dependent */
-};
-
-struct pdc_tlb_cf {		/* for PDC_CACHE (I/D-TLB's) */
-    unsigned long tc_pad0:12,	/* reserved */
-#ifdef CONFIG_64BIT
-		tc_padW:32,
-#endif
-		tc_sh	: 2,	/* 0 = separate I/D-TLB, else shared I/D-TLB */
-		tc_hv   : 1,	/* HV */
-		tc_page : 1,	/* 0 = 2K page-size-machine, 1 = 4k page size */
-		tc_cst  : 3,	/* 0 = incoherent operations, else coherent operations */
-		tc_aid  : 5,	/* ITLB: width of access ids of processor (encoded!) */
-		tc_sr   : 8;	/* ITLB: width of space-registers (encoded) */
-};
-
-struct pdc_cache_info {		/* main-PDC_CACHE-structure (caches & TLB's) */
-	/* I-cache */
-	unsigned long	ic_size;	/* size in bytes */
-	struct pdc_cache_cf ic_conf;	/* configuration */
-	unsigned long	ic_base;	/* base-addr */
-	unsigned long	ic_stride;
-	unsigned long	ic_count;
-	unsigned long	ic_loop;
-	/* D-cache */
-	unsigned long	dc_size;	/* size in bytes */
-	struct pdc_cache_cf dc_conf;	/* configuration */
-	unsigned long	dc_base;	/* base-addr */
-	unsigned long	dc_stride;
-	unsigned long	dc_count;
-	unsigned long	dc_loop;
-	/* Instruction-TLB */
-	unsigned long	it_size;	/* number of entries in I-TLB */
-	struct pdc_tlb_cf it_conf;	/* I-TLB-configuration */
-	unsigned long	it_sp_base;
-	unsigned long	it_sp_stride;
-	unsigned long	it_sp_count;
-	unsigned long	it_off_base;
-	unsigned long	it_off_stride;
-	unsigned long	it_off_count;
-	unsigned long	it_loop;
-	/* data-TLB */
-	unsigned long	dt_size;	/* number of entries in D-TLB */
-	struct pdc_tlb_cf dt_conf;	/* D-TLB-configuration */
-	unsigned long	dt_sp_base;
-	unsigned long	dt_sp_stride;
-	unsigned long	dt_sp_count;
-	unsigned long	dt_off_base;
-	unsigned long	dt_off_stride;
-	unsigned long	dt_off_count;
-	unsigned long	dt_loop;
-};
-
-#if 0
-/* If you start using the next struct, you'll have to adjust it to
- * work with 64-bit firmware I think -PB
- */
-struct pdc_iodc {     /* PDC_IODC */
-	unsigned char   hversion_model;
-	unsigned char 	hversion;
-	unsigned char 	spa;
-	unsigned char 	type;
-	unsigned int	sversion_rev:4;
-	unsigned int	sversion_model:19;
-	unsigned int	sversion_opt:8;
-	unsigned char	rev;
-	unsigned char	dep;
-	unsigned char	features;
-	unsigned char	pad1;
-	unsigned int	checksum:16;
-	unsigned int	length:16;
-	unsigned int    pad[15];
-} __attribute__((aligned(8))) ;
-#endif
-
-#ifndef CONFIG_PA20
-/* no BLTBs in pa2.0 processors */
-struct pdc_btlb_info_range {
-	__u8 res00;
-	__u8 num_i;
-	__u8 num_d;
-	__u8 num_comb;
-};
-
-struct pdc_btlb_info {	/* PDC_BLOCK_TLB, return of PDC_BTLB_INFO */
-	unsigned int min_size;	/* minimum size of BTLB in pages */
-	unsigned int max_size;	/* maximum size of BTLB in pages */
-	struct pdc_btlb_info_range fixed_range_info;
-	struct pdc_btlb_info_range variable_range_info;
-};
-
-#endif /* !CONFIG_PA20 */
-
-struct pdc_mem_retinfo { /* PDC_MEM/PDC_MEM_MEMINFO (return info) */
-	unsigned long pdt_size;
-	unsigned long pdt_entries;
-	unsigned long pdt_status;
-	unsigned long first_dbe_loc;
-	unsigned long good_mem;
-};
-
-struct pdc_mem_read_pdt { /* PDC_MEM/PDC_MEM_READ_PDT (return info) */
-	unsigned long pdt_entries;
-};
-
-#ifdef CONFIG_64BIT
-struct pdc_memory_table_raddr { /* PDC_MEM/PDC_MEM_TABLE (return info) */
-	unsigned long entries_returned;
-	unsigned long entries_total;
-};
-
-struct pdc_memory_table {       /* PDC_MEM/PDC_MEM_TABLE (arguments) */
-	unsigned long paddr;
-	unsigned int  pages;
-	unsigned int  reserved;
-};
-#endif /* CONFIG_64BIT */
-
-struct pdc_system_map_mod_info { /* PDC_SYSTEM_MAP/FIND_MODULE */
-	unsigned long mod_addr;
-	unsigned long mod_pgs;
-	unsigned long add_addrs;
-};
-
-struct pdc_system_map_addr_info { /* PDC_SYSTEM_MAP/FIND_ADDRESS */
-	unsigned long mod_addr;
-	unsigned long mod_pgs;
-};
-
-struct pdc_initiator { /* PDC_INITIATOR */
-	int host_id;
-	int factor;
-	int width;
-	int mode;
-};
-
-struct hardware_path {
-	char  flags;	/* see bit definitions below */
-	char  bc[6];	/* Bus Converter routing info to a specific */
-			/* I/O adaptor (< 0 means none, > 63 resvd) */
-	char  mod;	/* fixed field of specified module */
-};
-
-/*
- * Device path specifications used by PDC.
- */
-struct pdc_module_path {
-	struct hardware_path path;
-	unsigned int layers[6]; /* device-specific info (ctlr #, unit # ...) */
-};
-
-#ifndef CONFIG_PA20
-/* Only used on some pre-PA2.0 boxes */
-struct pdc_memory_map {		/* PDC_MEMORY_MAP */
-	unsigned long hpa;	/* mod's register set address */
-	unsigned long more_pgs;	/* number of additional I/O pgs */
-};
-#endif
-
-struct pdc_tod {
-	unsigned long tod_sec; 
-	unsigned long tod_usec;
-};
-
-/* architected results from PDC_PIM/transfer hpmc on a PA1.1 machine */
-
-struct pdc_hpmc_pim_11 { /* PDC_PIM */
-	__u32 gr[32];
-	__u32 cr[32];
-	__u32 sr[8];
-	__u32 iasq_back;
-	__u32 iaoq_back;
-	__u32 check_type;
-	__u32 cpu_state;
-	__u32 rsvd1;
-	__u32 cache_check;
-	__u32 tlb_check;
-	__u32 bus_check;
-	__u32 assists_check;
-	__u32 rsvd2;
-	__u32 assist_state;
-	__u32 responder_addr;
-	__u32 requestor_addr;
-	__u32 path_info;
-	__u64 fr[32];
-};
-
-/*
- * architected results from PDC_PIM/transfer hpmc on a PA2.0 machine
- *
- * Note that PDC_PIM doesn't care whether or not wide mode was enabled
- * so the results are different on  PA1.1 vs. PA2.0 when in narrow mode.
- *
- * Note also that there are unarchitected results available, which
- * are hversion dependent. Do a "ser pim 0 hpmc" after rebooting, since
- * the firmware is probably the best way of printing hversion dependent
- * data.
- */
-
-struct pdc_hpmc_pim_20 { /* PDC_PIM */
-	__u64 gr[32];
-	__u64 cr[32];
-	__u64 sr[8];
-	__u64 iasq_back;
-	__u64 iaoq_back;
-	__u32 check_type;
-	__u32 cpu_state;
-	__u32 cache_check;
-	__u32 tlb_check;
-	__u32 bus_check;
-	__u32 assists_check;
-	__u32 assist_state;
-	__u32 path_info;
-	__u64 responder_addr;
-	__u64 requestor_addr;
-	__u64 fr[32];
-};
-
 void pdc_console_init(void);	/* in pdc_console.c */
 void pdc_console_restart(void);
 
diff --git a/arch/parisc/include/asm/topology.h b/arch/parisc/include/asm/topology.h
new file mode 100644
index 000000000000..6f0750c74e47
--- /dev/null
+++ b/arch/parisc/include/asm/topology.h
@@ -0,0 +1,36 @@
+#ifndef _ASM_PARISC_TOPOLOGY_H
+#define _ASM_PARISC_TOPOLOGY_H
+
+#ifdef CONFIG_PARISC_CPU_TOPOLOGY
+
+#include <linux/cpumask.h>
+
+struct cputopo_parisc {
+	int thread_id;
+	int core_id;
+	int socket_id;
+	cpumask_t thread_sibling;
+	cpumask_t core_sibling;
+};
+
+extern struct cputopo_parisc cpu_topology[NR_CPUS];
+
+#define topology_physical_package_id(cpu)	(cpu_topology[cpu].socket_id)
+#define topology_core_id(cpu)		(cpu_topology[cpu].core_id)
+#define topology_core_cpumask(cpu)	(&cpu_topology[cpu].core_sibling)
+#define topology_sibling_cpumask(cpu)	(&cpu_topology[cpu].thread_sibling)
+
+void init_cpu_topology(void);
+void store_cpu_topology(unsigned int cpuid);
+const struct cpumask *cpu_coregroup_mask(int cpu);
+
+#else
+
+static inline void init_cpu_topology(void) { }
+static inline void store_cpu_topology(unsigned int cpuid) { }
+
+#endif
+
+#include <asm-generic/topology.h>
+
+#endif /* _ASM_ARM_TOPOLOGY_H */
diff --git a/arch/parisc/include/uapi/asm/pdc.h b/arch/parisc/include/uapi/asm/pdc.h
index 0ad117617f1a..593eeb573138 100644
--- a/arch/parisc/include/uapi/asm/pdc.h
+++ b/arch/parisc/include/uapi/asm/pdc.h
@@ -16,6 +16,7 @@
 #define PDC_ERROR		 -3	/* Call could not complete without an error */
 #define PDC_NE_MOD		 -5	/* Module not found		*/
 #define PDC_NE_CELL_MOD		 -7	/* Cell module not found	*/
+#define PDC_NE_BOOTDEV		 -9	/* Cannot locate a console device or boot device */
 #define PDC_INVALID_ARG		-10	/* Called with an invalid argument */
 #define PDC_BUS_POW_WARN	-12	/* Call could not complete in allowed power budget */
 #define PDC_NOT_NARROW		-17	/* Narrow mode not supported	*/
@@ -340,9 +341,6 @@
 
 #if !defined(__ASSEMBLY__)
 
-#include <linux/types.h>
-
-
 /* flags of the device_path */
 #define	PF_AUTOBOOT	0x80
 #define	PF_AUTOSEARCH	0x40
@@ -418,9 +416,255 @@ struct zeropage {
 	int	pad430[116];
 
 	/* [0x600] processor dependent */
-	__u32	pad600[1];
-	__u32	proc_sti;		/* pointer to STI ROM */
-	__u32	pad608[126];
+	unsigned int pad600[1];
+	unsigned int proc_sti;		/* pointer to STI ROM */
+	unsigned int pad608[126];
+};
+
+struct pdc_chassis_info {       /* for PDC_CHASSIS_INFO */
+	unsigned long actcnt;   /* actual number of bytes returned */
+	unsigned long maxcnt;   /* maximum number of bytes that could be returned */
+};
+
+struct pdc_coproc_cfg {         /* for PDC_COPROC_CFG */
+        unsigned long ccr_functional;
+        unsigned long ccr_present;
+        unsigned long revision;
+        unsigned long model;
+};
+
+struct pdc_model {		/* for PDC_MODEL */
+	unsigned long hversion;
+	unsigned long sversion;
+	unsigned long hw_id;
+	unsigned long boot_id;
+	unsigned long sw_id;
+	unsigned long sw_cap;
+	unsigned long arch_rev;
+	unsigned long pot_key;
+	unsigned long curr_key;
+};
+
+struct pdc_cache_cf {		/* for PDC_CACHE  (I/D-caches) */
+    unsigned long
+#ifdef __LP64__
+		cc_padW:32,
+#endif
+		cc_alias: 4,	/* alias boundaries for virtual addresses   */
+		cc_block: 4,	/* to determine most efficient stride */
+		cc_line	: 3,	/* maximum amount written back as a result of store (multiple of 16 bytes) */
+		cc_shift: 2,	/* how much to shift cc_block left */
+		cc_wt	: 1,	/* 0 = WT-Dcache, 1 = WB-Dcache */
+		cc_sh	: 2,	/* 0 = separate I/D-cache, else shared I/D-cache */
+		cc_cst  : 3,	/* 0 = incoherent D-cache, 1=coherent D-cache */
+		cc_pad1 : 10,	/* reserved */
+		cc_hv   : 3;	/* hversion dependent */
+};
+
+struct pdc_tlb_cf {		/* for PDC_CACHE (I/D-TLB's) */
+    unsigned long tc_pad0:12,	/* reserved */
+#ifdef __LP64__
+		tc_padW:32,
+#endif
+		tc_sh	: 2,	/* 0 = separate I/D-TLB, else shared I/D-TLB */
+		tc_hv   : 1,	/* HV */
+		tc_page : 1,	/* 0 = 2K page-size-machine, 1 = 4k page size */
+		tc_cst  : 3,	/* 0 = incoherent operations, else coherent operations */
+		tc_aid  : 5,	/* ITLB: width of access ids of processor (encoded!) */
+		tc_sr   : 8;	/* ITLB: width of space-registers (encoded) */
+};
+
+struct pdc_cache_info {		/* main-PDC_CACHE-structure (caches & TLB's) */
+	/* I-cache */
+	unsigned long	ic_size;	/* size in bytes */
+	struct pdc_cache_cf ic_conf;	/* configuration */
+	unsigned long	ic_base;	/* base-addr */
+	unsigned long	ic_stride;
+	unsigned long	ic_count;
+	unsigned long	ic_loop;
+	/* D-cache */
+	unsigned long	dc_size;	/* size in bytes */
+	struct pdc_cache_cf dc_conf;	/* configuration */
+	unsigned long	dc_base;	/* base-addr */
+	unsigned long	dc_stride;
+	unsigned long	dc_count;
+	unsigned long	dc_loop;
+	/* Instruction-TLB */
+	unsigned long	it_size;	/* number of entries in I-TLB */
+	struct pdc_tlb_cf it_conf;	/* I-TLB-configuration */
+	unsigned long	it_sp_base;
+	unsigned long	it_sp_stride;
+	unsigned long	it_sp_count;
+	unsigned long	it_off_base;
+	unsigned long	it_off_stride;
+	unsigned long	it_off_count;
+	unsigned long	it_loop;
+	/* data-TLB */
+	unsigned long	dt_size;	/* number of entries in D-TLB */
+	struct pdc_tlb_cf dt_conf;	/* D-TLB-configuration */
+	unsigned long	dt_sp_base;
+	unsigned long	dt_sp_stride;
+	unsigned long	dt_sp_count;
+	unsigned long	dt_off_base;
+	unsigned long	dt_off_stride;
+	unsigned long	dt_off_count;
+	unsigned long	dt_loop;
+};
+
+/* Might need adjustment to work with 64-bit firmware */
+struct pdc_iodc {     /* PDC_IODC */
+	unsigned char   hversion_model;
+	unsigned char 	hversion;
+	unsigned char 	spa;
+	unsigned char 	type;
+	unsigned int	sversion_rev:4;
+	unsigned int	sversion_model:19;
+	unsigned int	sversion_opt:8;
+	unsigned char	rev;
+	unsigned char	dep;
+	unsigned char	features;
+	unsigned char	pad1;
+	unsigned int	checksum:16;
+	unsigned int	length:16;
+	unsigned int    pad[15];
+} __attribute__((aligned(8))) ;
+
+/* no BLTBs in pa2.0 processors */
+struct pdc_btlb_info_range {
+	unsigned char res00;
+	unsigned char num_i;
+	unsigned char num_d;
+	unsigned char num_comb;
+};
+
+struct pdc_btlb_info {	/* PDC_BLOCK_TLB, return of PDC_BTLB_INFO */
+	unsigned int min_size;	/* minimum size of BTLB in pages */
+	unsigned int max_size;	/* maximum size of BTLB in pages */
+	struct pdc_btlb_info_range fixed_range_info;
+	struct pdc_btlb_info_range variable_range_info;
+};
+
+struct pdc_mem_retinfo { /* PDC_MEM/PDC_MEM_MEMINFO (return info) */
+	unsigned long pdt_size;
+	unsigned long pdt_entries;
+	unsigned long pdt_status;
+	unsigned long first_dbe_loc;
+	unsigned long good_mem;
+};
+
+struct pdc_mem_read_pdt { /* PDC_MEM/PDC_MEM_READ_PDT (return info) */
+	unsigned long pdt_entries;
+};
+
+#ifdef __LP64__
+struct pdc_memory_table_raddr { /* PDC_MEM/PDC_MEM_TABLE (return info) */
+	unsigned long entries_returned;
+	unsigned long entries_total;
+};
+
+struct pdc_memory_table {       /* PDC_MEM/PDC_MEM_TABLE (arguments) */
+	unsigned long paddr;
+	unsigned int  pages;
+	unsigned int  reserved;
+};
+#endif /* __LP64__ */
+
+struct pdc_system_map_mod_info { /* PDC_SYSTEM_MAP/FIND_MODULE */
+	unsigned long mod_addr;
+	unsigned long mod_pgs;
+	unsigned long add_addrs;
+};
+
+struct pdc_system_map_addr_info { /* PDC_SYSTEM_MAP/FIND_ADDRESS */
+	unsigned long mod_addr;
+	unsigned long mod_pgs;
+};
+
+struct pdc_initiator { /* PDC_INITIATOR */
+	int host_id;
+	int factor;
+	int width;
+	int mode;
+};
+
+struct hardware_path {
+	char  flags;	/* see bit definitions below */
+	char  bc[6];	/* Bus Converter routing info to a specific */
+			/* I/O adaptor (< 0 means none, > 63 resvd) */
+	char  mod;	/* fixed field of specified module */
+};
+
+/*
+ * Device path specifications used by PDC.
+ */
+struct pdc_module_path {
+	struct hardware_path path;
+	unsigned int layers[6]; /* device-specific info (ctlr #, unit # ...) */
+};
+
+/* Only used on some pre-PA2.0 boxes */
+struct pdc_memory_map {		/* PDC_MEMORY_MAP */
+	unsigned long hpa;	/* mod's register set address */
+	unsigned long more_pgs;	/* number of additional I/O pgs */
+};
+
+struct pdc_tod {
+	unsigned long tod_sec;
+	unsigned long tod_usec;
+};
+
+/* architected results from PDC_PIM/transfer hpmc on a PA1.1 machine */
+
+struct pdc_hpmc_pim_11 { /* PDC_PIM */
+	unsigned int gr[32];
+	unsigned int cr[32];
+	unsigned int sr[8];
+	unsigned int iasq_back;
+	unsigned int iaoq_back;
+	unsigned int check_type;
+	unsigned int cpu_state;
+	unsigned int rsvd1;
+	unsigned int cache_check;
+	unsigned int tlb_check;
+	unsigned int bus_check;
+	unsigned int assists_check;
+	unsigned int rsvd2;
+	unsigned int assist_state;
+	unsigned int responder_addr;
+	unsigned int requestor_addr;
+	unsigned int path_info;
+	unsigned long long fr[32];
+};
+
+/*
+ * architected results from PDC_PIM/transfer hpmc on a PA2.0 machine
+ *
+ * Note that PDC_PIM doesn't care whether or not wide mode was enabled
+ * so the results are different on  PA1.1 vs. PA2.0 when in narrow mode.
+ *
+ * Note also that there are unarchitected results available, which
+ * are hversion dependent. Do a "ser pim 0 hpmc" after rebooting, since
+ * the firmware is probably the best way of printing hversion dependent
+ * data.
+ */
+
+struct pdc_hpmc_pim_20 { /* PDC_PIM */
+	unsigned long long gr[32];
+	unsigned long long cr[32];
+	unsigned long long sr[8];
+	unsigned long long iasq_back;
+	unsigned long long iaoq_back;
+	unsigned int check_type;
+	unsigned int cpu_state;
+	unsigned int cache_check;
+	unsigned int tlb_check;
+	unsigned int bus_check;
+	unsigned int assists_check;
+	unsigned int assist_state;
+	unsigned int path_info;
+	unsigned long long responder_addr;
+	unsigned long long requestor_addr;
+	unsigned long long fr[32];
 };
 
 #endif /* !defined(__ASSEMBLY__) */
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index 649dc3eda448..eafd06ab59ef 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -9,8 +9,7 @@ obj-y	     	:= cache.o pacache.o setup.o pdt.o traps.o time.o irq.o \
 		   pa7300lc.o syscall.o entry.o sys_parisc.o firmware.o \
 		   ptrace.o hardware.o inventory.o drivers.o \
 		   signal.o hpmc.o real2.o parisc_ksyms.o unaligned.o \
-		   process.o processor.o pdc_cons.o pdc_chassis.o unwind.o \
-		   topology.o
+		   process.o processor.o pdc_cons.o pdc_chassis.o unwind.o
 
 ifdef CONFIG_FUNCTION_TRACER
 # Do not profile debug and lowlevel utilities
@@ -30,5 +29,6 @@ obj-$(CONFIG_AUDIT)	+= audit.o
 obj64-$(CONFIG_AUDIT)	+= compat_audit.o
 # only supported for PCX-W/U in 64-bit mode at the moment
 obj-$(CONFIG_64BIT)	+= perf.o perf_asm.o $(obj64-y)
+obj-$(CONFIG_PARISC_CPU_TOPOLOGY)	+= topology.o
 obj-$(CONFIG_FUNCTION_TRACER)		+= ftrace.o
 obj-$(CONFIG_FUNCTION_GRAPH_TRACER)	+= ftrace.o
diff --git a/arch/parisc/kernel/processor.c b/arch/parisc/kernel/processor.c
index e120d63c1b28..45cc65902fce 100644
--- a/arch/parisc/kernel/processor.c
+++ b/arch/parisc/kernel/processor.c
@@ -184,6 +184,9 @@ static int __init processor_probe(struct parisc_device *dev)
 	p->txn_addr = txn_addr;	/* save CPU IRQ address */
 	p->cpu_num = cpu_info.cpu_num;
 	p->cpu_loc = cpu_info.cpu_loc;
+
+	store_cpu_topology(cpuid);
+
 #ifdef CONFIG_SMP
 	/*
 	** FIXME: review if any other initialization is clobbered
@@ -325,6 +328,8 @@ int __init init_per_cpu(int cpunum)
 	set_firmware_width();
 	ret = pdc_coproc_cfg(&coproc_cfg);
 
+	store_cpu_topology(cpunum);
+
 	if(ret >= 0 && coproc_cfg.ccr_functional) {
 		mtctl(coproc_cfg.ccr_functional, 10);  /* 10 == Coprocessor Control Reg */
 
@@ -388,6 +393,14 @@ show_cpuinfo (struct seq_file *m, void *v)
 				 boot_cpu_data.cpu_hz / 1000000,
 				 boot_cpu_data.cpu_hz % 1000000  );
 
+#ifdef CONFIG_PARISC_CPU_TOPOLOGY
+		seq_printf(m, "physical id\t: %d\n",
+				topology_physical_package_id(cpu));
+		seq_printf(m, "siblings\t: %d\n",
+				cpumask_weight(topology_core_cpumask(cpu)));
+		seq_printf(m, "core id\t\t: %d\n", topology_core_id(cpu));
+#endif
+
 		seq_printf(m, "capabilities\t:");
 		if (boot_cpu_data.pdc.capabilities & PDC_MODEL_OS32)
 			seq_puts(m, " os32");
diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
index f7d0c3b33d70..0e9675f857a5 100644
--- a/arch/parisc/kernel/setup.c
+++ b/arch/parisc/kernel/setup.c
@@ -408,6 +408,8 @@ void __init start_parisc(void)
 
 	cpunum = smp_processor_id();
 
+	init_cpu_topology();
+
 	set_firmware_width_unlocked();
 
 	ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S
index 41e60a9c7db2..e775f80ae28c 100644
--- a/arch/parisc/kernel/syscall.S
+++ b/arch/parisc/kernel/syscall.S
@@ -690,15 +690,15 @@ cas_action:
 	/* ELF32 Process entry path */
 lws_compare_and_swap_2:
 #ifdef CONFIG_64BIT
-	/* Clip the input registers */
+	/* Clip the input registers. We don't need to clip %r23 as we
+	   only use it for word operations */
 	depdi	0, 31, 32, %r26
 	depdi	0, 31, 32, %r25
 	depdi	0, 31, 32, %r24
-	depdi	0, 31, 32, %r23
 #endif
 
 	/* Check the validity of the size pointer */
-	subi,>>= 4, %r23, %r0
+	subi,>>= 3, %r23, %r0
 	b,n	lws_exit_nosys
 
 	/* Jump to the functions which will load the old and new values into
diff --git a/arch/parisc/kernel/topology.c b/arch/parisc/kernel/topology.c
index f5159381fdd6..0a10e4ddc528 100644
--- a/arch/parisc/kernel/topology.c
+++ b/arch/parisc/kernel/topology.c
@@ -1,37 +1,142 @@
 /*
- * arch/parisc/kernel/topology.c - Populate sysfs with topology information
+ * arch/parisc/kernel/topology.c
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * Copyright (C) 2017 Helge Deller <deller@gmx.de>
  *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT.  See the GNU General Public License for more
- * details.
+ * based on arch/arm/kernel/topology.c
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
  */
 
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/cpu.h>
-#include <linux/cache.h>
+#include <linux/percpu.h>
+#include <linux/sched.h>
+#include <linux/sched/topology.h>
 
-static DEFINE_PER_CPU(struct cpu, cpu_devices);
+#include <asm/topology.h>
 
-static int __init topology_init(void)
+ /*
+  * cpu topology table
+  */
+struct cputopo_parisc cpu_topology[NR_CPUS] __read_mostly;
+EXPORT_SYMBOL_GPL(cpu_topology);
+
+const struct cpumask *cpu_coregroup_mask(int cpu)
 {
-	int num;
+	return &cpu_topology[cpu].core_sibling;
+}
+
+static void update_siblings_masks(unsigned int cpuid)
+{
+	struct cputopo_parisc *cpu_topo, *cpuid_topo = &cpu_topology[cpuid];
+	int cpu;
+
+	/* update core and thread sibling masks */
+	for_each_possible_cpu(cpu) {
+		cpu_topo = &cpu_topology[cpu];
+
+		if (cpuid_topo->socket_id != cpu_topo->socket_id)
+			continue;
+
+		cpumask_set_cpu(cpuid, &cpu_topo->core_sibling);
+		if (cpu != cpuid)
+			cpumask_set_cpu(cpu, &cpuid_topo->core_sibling);
+
+		if (cpuid_topo->core_id != cpu_topo->core_id)
+			continue;
+
+		cpumask_set_cpu(cpuid, &cpu_topo->thread_sibling);
+		if (cpu != cpuid)
+			cpumask_set_cpu(cpu, &cpuid_topo->thread_sibling);
+	}
+	smp_wmb();
+}
+
+static int dualcores_found __initdata;
+
+/*
+ * store_cpu_topology is called at boot when only one cpu is running
+ * and with the mutex cpu_hotplug.lock locked, when several cpus have booted,
+ * which prevents simultaneous write access to cpu_topology array
+ */
+void __init store_cpu_topology(unsigned int cpuid)
+{
+	struct cputopo_parisc *cpuid_topo = &cpu_topology[cpuid];
+	struct cpuinfo_parisc *p;
+	int max_socket = -1;
+	unsigned long cpu;
+
+	/* If the cpu topology has been already set, just return */
+	if (cpuid_topo->core_id != -1)
+		return;
 
-	for_each_present_cpu(num) {
-		register_cpu(&per_cpu(cpu_devices, num), num);
+	/* create cpu topology mapping */
+	cpuid_topo->thread_id = -1;
+	cpuid_topo->core_id = 0;
+
+	p = &per_cpu(cpu_data, cpuid);
+	for_each_online_cpu(cpu) {
+		const struct cpuinfo_parisc *cpuinfo = &per_cpu(cpu_data, cpu);
+
+		if (cpu == cpuid) /* ignore current cpu */
+			continue;
+
+		if (cpuinfo->cpu_loc == p->cpu_loc) {
+			cpuid_topo->core_id = cpu_topology[cpu].core_id;
+			if (p->cpu_loc) {
+				cpuid_topo->core_id++;
+				cpuid_topo->socket_id = cpu_topology[cpu].socket_id;
+				dualcores_found = 1;
+				continue;
+			}
+		}
+
+		if (cpuid_topo->socket_id == -1)
+			max_socket = max(max_socket, cpu_topology[cpu].socket_id);
 	}
-	return 0;
+
+	if (cpuid_topo->socket_id == -1)
+		cpuid_topo->socket_id = max_socket + 1;
+
+	update_siblings_masks(cpuid);
+
+	pr_info("CPU%u: thread %d, cpu %d, socket %d\n",
+		cpuid, cpu_topology[cpuid].thread_id,
+		cpu_topology[cpuid].core_id,
+		cpu_topology[cpuid].socket_id);
 }
 
-subsys_initcall(topology_init);
+static struct sched_domain_topology_level parisc_mc_topology[] = {
+#ifdef CONFIG_SCHED_MC
+	{ cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
+#endif
+
+	{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
+	{ NULL, },
+};
+
+/*
+ * init_cpu_topology is called at boot when only one cpu is running
+ * which prevent simultaneous write access to cpu_topology array
+ */
+void __init init_cpu_topology(void)
+{
+	unsigned int cpu;
+
+	/* init core mask and capacity */
+	for_each_possible_cpu(cpu) {
+		struct cputopo_parisc *cpu_topo = &(cpu_topology[cpu]);
+
+		cpu_topo->thread_id = -1;
+		cpu_topo->core_id =  -1;
+		cpu_topo->socket_id = -1;
+		cpumask_clear(&cpu_topo->core_sibling);
+		cpumask_clear(&cpu_topo->thread_sibling);
+	}
+	smp_wmb();
+
+	/* Set scheduler topology descriptor */
+	if (dualcores_found)
+		set_sched_topology(parisc_mc_topology);
+}