Merge tag 's390-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Martin Schwidefsky:

 - Support for kernel address space layout randomization

 - Add support for kernel image signature verification

 - Convert s390 to the generic get_user_pages_fast code

 - Convert s390 to the stack unwind API analog to x86

 - Add support for CPU directed interrupts for PCI devices

 - Provide support for MIO instructions to the PCI base layer, this will
   allow the use of direct PCI mappings in user space code

 - Add the basic KVM guest ultravisor interface for protected VMs

 - Add AT_HWCAP bits for several new hardware capabilities

 - Update the CPU measurement facility counter definitions to SVN 6

 - Arnds cleanup patches for his quest to get LLVM compiles working

 - A vfio-ccw update with bug fixes and support for halt and clear

 - Improvements for the hardware TRNG code

 - Another round of cleanup for the QDIO layer

 - Numerous cleanups and bug fixes

* tag 's390-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (98 commits)
  s390/vdso: drop unnecessary cc-ldoption
  s390: fix clang -Wpointer-sign warnigns in boot code
  s390: drop CONFIG_VIRT_TO_BUS
  s390: boot, purgatory: pass $(CLANG_FLAGS) where needed
  s390: only build for new CPUs with clang
  s390: simplify disabled_wait
  s390/ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
  s390/unwind: introduce stack unwind API
  s390/opcodes: add missing instructions to the disassembler
  s390/bug: add entry size to the __bug_table section
  s390: use proper expoline sections for .dma code
  s390/nospec: rename assembler generated expoline thunks
  s390: add missing ENDPROC statements to assembler functions
  locking/lockdep: check for freed initmem in static_obj()
  s390/kernel: add support for kernel address space layout randomization (KASLR)
  s390/kernel: introduce .dma sections
  s390/sclp: do not use static sccbs
  s390/kprobes: use static buffer for insn_page
  s390/kernel: convert SYSCALL and PGM_CHECK handlers to .quad
  s390/kernel: build a relocatable kernel
  ...

6 files changed, 81 insertions, 64 deletions

diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c
index e9aa71cdfc44..d2ab3f07c008 100644
--- a/drivers/s390/char/sclp.c
+++ b/drivers/s390/char/sclp.c
@@ -45,8 +45,8 @@ static struct list_head sclp_req_queue;
 /* Data for read and and init requests. */
 static struct sclp_req sclp_read_req;
 static struct sclp_req sclp_init_req;
-static char sclp_read_sccb[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
-static char sclp_init_sccb[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));
+static void *sclp_read_sccb;
+static struct init_sccb *sclp_init_sccb;
 
 /* Suspend request */
 static DECLARE_COMPLETION(sclp_request_queue_flushed);
@@ -753,9 +753,8 @@ EXPORT_SYMBOL(sclp_remove_processed);
 static inline void
 __sclp_make_init_req(sccb_mask_t receive_mask, sccb_mask_t send_mask)
 {
-	struct init_sccb *sccb;
+	struct init_sccb *sccb = sclp_init_sccb;
 
-	sccb = (struct init_sccb *) sclp_init_sccb;
 	clear_page(sccb);
 	memset(&sclp_init_req, 0, sizeof(struct sclp_req));
 	sclp_init_req.command = SCLP_CMDW_WRITE_EVENT_MASK;
@@ -782,7 +781,7 @@ static int
 sclp_init_mask(int calculate)
 {
 	unsigned long flags;
-	struct init_sccb *sccb = (struct init_sccb *) sclp_init_sccb;
+	struct init_sccb *sccb = sclp_init_sccb;
 	sccb_mask_t receive_mask;
 	sccb_mask_t send_mask;
 	int retry;
@@ -1175,6 +1174,9 @@ sclp_init(void)
 	if (sclp_init_state != sclp_init_state_uninitialized)
 		goto fail_unlock;
 	sclp_init_state = sclp_init_state_initializing;
+	sclp_read_sccb = (void *) __get_free_page(GFP_ATOMIC | GFP_DMA);
+	sclp_init_sccb = (void *) __get_free_page(GFP_ATOMIC | GFP_DMA);
+	BUG_ON(!sclp_read_sccb || !sclp_init_sccb);
 	/* Set up variables */
 	INIT_LIST_HEAD(&sclp_req_queue);
 	INIT_LIST_HEAD(&sclp_reg_list);
@@ -1207,6 +1209,8 @@ fail_unregister_reboot_notifier:
 	unregister_reboot_notifier(&sclp_reboot_notifier);
 fail_init_state_uninitialized:
 	sclp_init_state = sclp_init_state_uninitialized;
+	free_page((unsigned long) sclp_read_sccb);
+	free_page((unsigned long) sclp_init_sccb);
 fail_unlock:
 	spin_unlock_irqrestore(&sclp_lock, flags);
 	return rc;
diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index 367e9d384d85..196333013e54 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -197,7 +197,9 @@ struct read_info_sccb {
 	u32	hmfai;			/* 124-127 */
 	u8	_pad_128[134 - 128];	/* 128-133 */
 	u8	byte_134;			/* 134 */
-	u8	_pad_135[4096 - 135];	/* 135-4095 */
+	u8	cpudirq;		/* 135 */
+	u16	cbl;			/* 136-137 */
+	u8	_pad_138[4096 - 138];	/* 138-4095 */
 } __packed __aligned(PAGE_SIZE);
 
 struct read_storage_sccb {
@@ -319,7 +321,7 @@ extern int sclp_console_drop;
 extern unsigned long sclp_console_full;
 extern bool sclp_mask_compat_mode;
 
-extern char sclp_early_sccb[PAGE_SIZE];
+extern char *sclp_early_sccb;
 
 void sclp_early_wait_irq(void);
 int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
@@ -365,14 +367,14 @@ sclp_ascebc(unsigned char ch)
 
 /* translate string from EBCDIC to ASCII */
 static inline void
-sclp_ebcasc_str(unsigned char *str, int nr)
+sclp_ebcasc_str(char *str, int nr)
 {
 	(MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
 }
 
 /* translate string from ASCII to EBCDIC */
 static inline void
-sclp_ascebc_str(unsigned char *str, int nr)
+sclp_ascebc_str(char *str, int nr)
 {
 	(MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
 }
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index 8332788681c4..6c90aa725f23 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -40,6 +40,8 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
 	sclp.has_gisaf = !!(sccb->fac118 & 0x08);
 	sclp.has_hvs = !!(sccb->fac119 & 0x80);
 	sclp.has_kss = !!(sccb->fac98 & 0x01);
+	sclp.has_sipl = !!(sccb->cbl & 0x02);
+	sclp.has_sipl_g2 = !!(sccb->cbl & 0x04);
 	if (sccb->fac85 & 0x02)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
 	if (sccb->fac91 & 0x40)
@@ -93,6 +95,7 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
 	sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
 
 	sclp.hmfai = sccb->hmfai;
+	sclp.has_dirq = !!(sccb->cpudirq & 0x80);
 }
 
 /*
@@ -144,7 +147,7 @@ static void __init sclp_early_console_detect(struct init_sccb *sccb)
 
 void __init sclp_early_detect(void)
 {
-	void *sccb = &sclp_early_sccb;
+	void *sccb = sclp_early_sccb;
 
 	sclp_early_facilities_detect(sccb);
 	sclp_early_init_core_info(sccb);
diff --git a/drivers/s390/char/sclp_early_core.c b/drivers/s390/char/sclp_early_core.c
index 387c114ded3f..7737470f8498 100644
--- a/drivers/s390/char/sclp_early_core.c
+++ b/drivers/s390/char/sclp_early_core.c
@@ -16,7 +16,7 @@
 
 static struct read_info_sccb __bootdata(sclp_info_sccb);
 static int __bootdata(sclp_info_sccb_valid);
-char sclp_early_sccb[PAGE_SIZE] __aligned(PAGE_SIZE) __section(.data);
+char *sclp_early_sccb = (char *) EARLY_SCCB_OFFSET;
 int sclp_init_state __section(.data) = sclp_init_state_uninitialized;
 /*
  * Used to keep track of the size of the event masks. Qemu until version 2.11
@@ -91,8 +91,8 @@ static void sclp_early_print_lm(const char *str, unsigned int len)
 	struct mto *mto;
 	struct go *go;
 
-	sccb = (struct write_sccb *) &sclp_early_sccb;
-	end = (unsigned char *) sccb + sizeof(sclp_early_sccb) - 1;
+	sccb = (struct write_sccb *) sclp_early_sccb;
+	end = (unsigned char *) sccb + EARLY_SCCB_SIZE - 1;
 	memset(sccb, 0, sizeof(*sccb));
 	ptr = (unsigned char *) &sccb->msg.mdb.mto;
 	offset = 0;
@@ -139,9 +139,9 @@ static void sclp_early_print_vt220(const char *str, unsigned int len)
 {
 	struct vt220_sccb *sccb;
 
-	sccb = (struct vt220_sccb *) &sclp_early_sccb;
-	if (sizeof(*sccb) + len >= sizeof(sclp_early_sccb))
-		len = sizeof(sclp_early_sccb) - sizeof(*sccb);
+	sccb = (struct vt220_sccb *) sclp_early_sccb;
+	if (sizeof(*sccb) + len >= EARLY_SCCB_SIZE)
+		len = EARLY_SCCB_SIZE - sizeof(*sccb);
 	memset(sccb, 0, sizeof(*sccb));
 	memcpy(&sccb->msg.data, str, len);
 	sccb->header.length = sizeof(*sccb) + len;
@@ -199,7 +199,7 @@ static int sclp_early_setup(int disable, int *have_linemode, int *have_vt220)
 	BUILD_BUG_ON(sizeof(struct init_sccb) > PAGE_SIZE);
 
 	*have_linemode = *have_vt220 = 0;
-	sccb = (struct init_sccb *) &sclp_early_sccb;
+	sccb = (struct init_sccb *) sclp_early_sccb;
 	receive_mask = disable ? 0 : EVTYP_OPCMD_MASK;
 	send_mask = disable ? 0 : EVTYP_VT220MSG_MASK | EVTYP_MSG_MASK;
 	rc = sclp_early_set_event_mask(sccb, receive_mask, send_mask);
@@ -304,7 +304,7 @@ int __init sclp_early_get_hsa_size(unsigned long *hsa_size)
 void __weak __init add_mem_detect_block(u64 start, u64 end) {}
 int __init sclp_early_read_storage_info(void)
 {
-	struct read_storage_sccb *sccb = (struct read_storage_sccb *)&sclp_early_sccb;
+	struct read_storage_sccb *sccb = (struct read_storage_sccb *)sclp_early_sccb;
 	int rc, id, max_id = 0;
 	unsigned long rn, rzm;
 	sclp_cmdw_t command;
@@ -320,8 +320,8 @@ int __init sclp_early_read_storage_info(void)
 	rzm <<= 20;
 
 	for (id = 0; id <= max_id; id++) {
-		memset(sclp_early_sccb, 0, sizeof(sclp_early_sccb));
-		sccb->header.length = sizeof(sclp_early_sccb);
+		memset(sclp_early_sccb, 0, EARLY_SCCB_SIZE);
+		sccb->header.length = EARLY_SCCB_SIZE;
 		command = SCLP_CMDW_READ_STORAGE_INFO | (id << 8);
 		rc = sclp_early_cmd(command, sccb);
 		if (rc)
diff --git a/drivers/s390/char/sclp_sdias.c b/drivers/s390/char/sclp_sdias.c
index 8e0b69a2f11a..13f97fd73aca 100644
--- a/drivers/s390/char/sclp_sdias.c
+++ b/drivers/s390/char/sclp_sdias.c
@@ -29,7 +29,7 @@ static struct sclp_register sclp_sdias_register = {
 	.send_mask = EVTYP_SDIAS_MASK,
 };
 
-static struct sdias_sccb sccb __attribute__((aligned(4096)));
+static struct sdias_sccb *sclp_sdias_sccb;
 static struct sdias_evbuf sdias_evbuf;
 
 static DECLARE_COMPLETION(evbuf_accepted);
@@ -58,6 +58,7 @@ static void sdias_callback(struct sclp_req *request, void *data)
 
 static int sdias_sclp_send(struct sclp_req *req)
 {
+	struct sdias_sccb *sccb = sclp_sdias_sccb;
 	int retries;
 	int rc;
 
@@ -78,16 +79,16 @@ static int sdias_sclp_send(struct sclp_req *req)
 			continue;
 		}
 		/* if not accepted, retry */
-		if (!(sccb.evbuf.hdr.flags & 0x80)) {
+		if (!(sccb->evbuf.hdr.flags & 0x80)) {
 			TRACE("sclp request failed: flags=%x\n",
-			      sccb.evbuf.hdr.flags);
+			      sccb->evbuf.hdr.flags);
 			continue;
 		}
 		/*
 		 * for the sync interface the response is in the initial sccb
 		 */
 		if (!sclp_sdias_register.receiver_fn) {
-			memcpy(&sdias_evbuf, &sccb.evbuf, sizeof(sdias_evbuf));
+			memcpy(&sdias_evbuf, &sccb->evbuf, sizeof(sdias_evbuf));
 			TRACE("sync request done\n");
 			return 0;
 		}
@@ -104,23 +105,24 @@ static int sdias_sclp_send(struct sclp_req *req)
  */
 int sclp_sdias_blk_count(void)
 {
+	struct sdias_sccb *sccb = sclp_sdias_sccb;
 	struct sclp_req request;
 	int rc;
 
 	mutex_lock(&sdias_mutex);
 
-	memset(&sccb, 0, sizeof(sccb));
+	memset(sccb, 0, sizeof(*sccb));
 	memset(&request, 0, sizeof(request));
 
-	sccb.hdr.length = sizeof(sccb);
-	sccb.evbuf.hdr.length = sizeof(struct sdias_evbuf);
-	sccb.evbuf.hdr.type = EVTYP_SDIAS;
-	sccb.evbuf.event_qual = SDIAS_EQ_SIZE;
-	sccb.evbuf.data_id = SDIAS_DI_FCP_DUMP;
-	sccb.evbuf.event_id = 4712;
-	sccb.evbuf.dbs = 1;
+	sccb->hdr.length = sizeof(*sccb);
+	sccb->evbuf.hdr.length = sizeof(struct sdias_evbuf);
+	sccb->evbuf.hdr.type = EVTYP_SDIAS;
+	sccb->evbuf.event_qual = SDIAS_EQ_SIZE;
+	sccb->evbuf.data_id = SDIAS_DI_FCP_DUMP;
+	sccb->evbuf.event_id = 4712;
+	sccb->evbuf.dbs = 1;
 
-	request.sccb = &sccb;
+	request.sccb = sccb;
 	request.command = SCLP_CMDW_WRITE_EVENT_DATA;
 	request.status = SCLP_REQ_FILLED;
 	request.callback = sdias_callback;
@@ -130,8 +132,8 @@ int sclp_sdias_blk_count(void)
 		pr_err("sclp_send failed for get_nr_blocks\n");
 		goto out;
 	}
-	if (sccb.hdr.response_code != 0x0020) {
-		TRACE("send failed: %x\n", sccb.hdr.response_code);
+	if (sccb->hdr.response_code != 0x0020) {
+		TRACE("send failed: %x\n", sccb->hdr.response_code);
 		rc = -EIO;
 		goto out;
 	}
@@ -163,30 +165,31 @@ out:
  */
 int sclp_sdias_copy(void *dest, int start_blk, int nr_blks)
 {
+	struct sdias_sccb *sccb = sclp_sdias_sccb;
 	struct sclp_req request;
 	int rc;
 
 	mutex_lock(&sdias_mutex);
 
-	memset(&sccb, 0, sizeof(sccb));
+	memset(sccb, 0, sizeof(*sccb));
 	memset(&request, 0, sizeof(request));
 
-	sccb.hdr.length = sizeof(sccb);
-	sccb.evbuf.hdr.length = sizeof(struct sdias_evbuf);
-	sccb.evbuf.hdr.type = EVTYP_SDIAS;
-	sccb.evbuf.hdr.flags = 0;
-	sccb.evbuf.event_qual = SDIAS_EQ_STORE_DATA;
-	sccb.evbuf.data_id = SDIAS_DI_FCP_DUMP;
-	sccb.evbuf.event_id = 4712;
-	sccb.evbuf.asa_size = SDIAS_ASA_SIZE_64;
-	sccb.evbuf.event_status = 0;
-	sccb.evbuf.blk_cnt = nr_blks;
-	sccb.evbuf.asa = (unsigned long)dest;
-	sccb.evbuf.fbn = start_blk;
-	sccb.evbuf.lbn = 0;
-	sccb.evbuf.dbs = 1;
-
-	request.sccb	 = &sccb;
+	sccb->hdr.length = sizeof(*sccb);
+	sccb->evbuf.hdr.length = sizeof(struct sdias_evbuf);
+	sccb->evbuf.hdr.type = EVTYP_SDIAS;
+	sccb->evbuf.hdr.flags = 0;
+	sccb->evbuf.event_qual = SDIAS_EQ_STORE_DATA;
+	sccb->evbuf.data_id = SDIAS_DI_FCP_DUMP;
+	sccb->evbuf.event_id = 4712;
+	sccb->evbuf.asa_size = SDIAS_ASA_SIZE_64;
+	sccb->evbuf.event_status = 0;
+	sccb->evbuf.blk_cnt = nr_blks;
+	sccb->evbuf.asa = (unsigned long)dest;
+	sccb->evbuf.fbn = start_blk;
+	sccb->evbuf.lbn = 0;
+	sccb->evbuf.dbs = 1;
+
+	request.sccb	 = sccb;
 	request.command  = SCLP_CMDW_WRITE_EVENT_DATA;
 	request.status	 = SCLP_REQ_FILLED;
 	request.callback = sdias_callback;
@@ -196,8 +199,8 @@ int sclp_sdias_copy(void *dest, int start_blk, int nr_blks)
 		pr_err("sclp_send failed: %x\n", rc);
 		goto out;
 	}
-	if (sccb.hdr.response_code != 0x0020) {
-		TRACE("copy failed: %x\n", sccb.hdr.response_code);
+	if (sccb->hdr.response_code != 0x0020) {
+		TRACE("copy failed: %x\n", sccb->hdr.response_code);
 		rc = -EIO;
 		goto out;
 	}
@@ -256,6 +259,8 @@ int __init sclp_sdias_init(void)
 {
 	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
 		return 0;
+	sclp_sdias_sccb = (void *) __get_free_page(GFP_KERNEL | GFP_DMA);
+	BUG_ON(!sclp_sdias_sccb);
 	sdias_dbf = debug_register("dump_sdias", 4, 1, 4 * sizeof(long));
 	debug_register_view(sdias_dbf, &debug_sprintf_view);
 	debug_set_level(sdias_dbf, 6);
@@ -264,6 +269,7 @@ int __init sclp_sdias_init(void)
 	if (sclp_sdias_init_async() == 0)
 		goto out;
 	TRACE("init failed\n");
+	free_page((unsigned long) sclp_sdias_sccb);
 	return -ENODEV;
 out:
 	TRACE("init done\n");
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 76d3c50bf078..f75d3bfb5af3 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -51,7 +51,7 @@ static struct dentry *zcore_dir;
 static struct dentry *zcore_memmap_file;
 static struct dentry *zcore_reipl_file;
 static struct dentry *zcore_hsa_file;
-static struct ipl_parameter_block *ipl_block;
+static struct ipl_parameter_block *zcore_ipl_block;
 
 static char hsa_buf[PAGE_SIZE] __aligned(PAGE_SIZE);
 
@@ -182,8 +182,8 @@ static const struct file_operations zcore_memmap_fops = {
 static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf,
 				 size_t count, loff_t *ppos)
 {
-	if (ipl_block) {
-		diag308(DIAG308_SET, ipl_block);
+	if (zcore_ipl_block) {
+		diag308(DIAG308_SET, zcore_ipl_block);
 		diag308(DIAG308_LOAD_CLEAR, NULL);
 	}
 	return count;
@@ -265,18 +265,20 @@ static int __init zcore_reipl_init(void)
 		return rc;
 	if (ipib_info.ipib == 0)
 		return 0;
-	ipl_block = (void *) __get_free_page(GFP_KERNEL);
-	if (!ipl_block)
+	zcore_ipl_block = (void *) __get_free_page(GFP_KERNEL);
+	if (!zcore_ipl_block)
 		return -ENOMEM;
 	if (ipib_info.ipib < sclp.hsa_size)
-		rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
+		rc = memcpy_hsa_kernel(zcore_ipl_block, ipib_info.ipib,
+				       PAGE_SIZE);
 	else
-		rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);
-	if (rc || (__force u32)csum_partial(ipl_block, ipl_block->hdr.len, 0) !=
+		rc = memcpy_real(zcore_ipl_block, (void *) ipib_info.ipib,
+				 PAGE_SIZE);
+	if (rc || (__force u32)csum_partial(zcore_ipl_block, zcore_ipl_block->hdr.len, 0) !=
 	    ipib_info.checksum) {
 		TRACE("Checksum does not match\n");
-		free_page((unsigned long) ipl_block);
-		ipl_block = NULL;
+		free_page((unsigned long) zcore_ipl_block);
+		zcore_ipl_block = NULL;
 	}
 	return 0;
 }