From 2d70ca23f86647e076e3a8b64b3a90e583b894d5 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:41 +0200
Subject: [S390] Convert sys_clone to function with parameters.

Use function parameters instead of accessing the pt_regs structure
to get the parameters.
Also merge the 31 and 64 bit versions since they are identical.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/kernel/compat_linux.c   | 17 -----------------
 arch/s390/kernel/compat_linux.h   |  1 -
 arch/s390/kernel/compat_wrapper.S |  8 ++++++++
 arch/s390/kernel/entry.h          |  3 ++-
 arch/s390/kernel/process.c        | 10 ++--------
 arch/s390/kernel/syscalls.S       |  2 +-
 6 files changed, 13 insertions(+), 28 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 9ab188d67a3d..f741cd49111a 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -801,23 +801,6 @@ asmlinkage long sys32_write(unsigned int fd, char __user * buf, size_t count)
 	return sys_write(fd, buf, count);
 }
 
-asmlinkage long sys32_clone(void)
-{
-	struct pt_regs *regs = task_pt_regs(current);
-	unsigned long clone_flags;
-	unsigned long newsp;
-	int __user *parent_tidptr, *child_tidptr;
-
-	clone_flags = regs->gprs[3] & 0xffffffffUL;
-	newsp = regs->orig_gpr2 & 0x7fffffffUL;
-	parent_tidptr = compat_ptr(regs->gprs[4]);
-	child_tidptr = compat_ptr(regs->gprs[5]);
-	if (!newsp)
-		newsp = regs->gprs[15];
-	return do_fork(clone_flags, newsp, regs, 0,
-		       parent_tidptr, child_tidptr);
-}
-
 /*
  * 31 bit emulation wrapper functions for sys_fadvise64/fadvise64_64.
  * These need to rewrite the advise values for POSIX_FADV_{DONTNEED,NOREUSE}
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index 836a28842900..7cceb67ff8a2 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -222,7 +222,6 @@ unsigned long old32_mmap(struct mmap_arg_struct_emu31 __user *arg);
 long sys32_mmap2(struct mmap_arg_struct_emu31 __user *arg);
 long sys32_read(unsigned int fd, char __user * buf, size_t count);
 long sys32_write(unsigned int fd, char __user * buf, size_t count);
-long sys32_clone(void);
 long sys32_fadvise64(int fd, loff_t offset, size_t len, int advise);
 long sys32_fadvise64_64(struct fadvise64_64_args __user *args);
 long sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 624790042d41..28f8440d2ec3 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1840,3 +1840,11 @@ sys_perf_event_open_wrapper:
 	lgfr	%r5,%r5			# int
 	llgfr	%r6,%r6			# unsigned long
 	jg	sys_perf_event_open	# branch to system call
+
+	.globl	sys_clone_wrapper
+sys_clone_wrapper:
+	llgfr	%r2,%r2			# unsigned long
+	llgfr	%r3,%r3			# unsigned long
+	llgtr	%r4,%r4			# int *
+	llgtr	%r5,%r5			# int *
+	jg	sys_clone		# branch to system call
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index 950c59c6688b..91fd78839c57 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -42,7 +42,8 @@ long sys_s390_fadvise64_64(struct fadvise64_64_args __user *args);
 long sys_s390_fallocate(int fd, int mode, loff_t offset, u32 len_high,
 			u32 len_low);
 long sys_fork(void);
-long sys_clone(void);
+long sys_clone(unsigned long newsp, unsigned long clone_flags,
+	       int __user *parent_tidptr, int __user *child_tidptr);
 long sys_vfork(void);
 void execve_tail(void);
 long sys_execve(void);
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 5a43f27eec13..189d978f76d6 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -230,17 +230,11 @@ SYSCALL_DEFINE0(fork)
 	return do_fork(SIGCHLD, regs->gprs[15], regs, 0, NULL, NULL);
 }
 
-SYSCALL_DEFINE0(clone)
+SYSCALL_DEFINE4(clone, unsigned long, newsp, unsigned long, clone_flags,
+		int __user *, parent_tidptr, int __user *, child_tidptr)
 {
 	struct pt_regs *regs = task_pt_regs(current);
-	unsigned long clone_flags;
-	unsigned long newsp;
-	int __user *parent_tidptr, *child_tidptr;
 
-	clone_flags = regs->gprs[3];
-	newsp = regs->orig_gpr2;
-	parent_tidptr = (int __user *) regs->gprs[4];
-	child_tidptr = (int __user *) regs->gprs[5];
 	if (!newsp)
 		newsp = regs->gprs[15];
 	return do_fork(clone_flags, newsp, regs, 0,
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 0b5083681e77..ff79d58e0eb3 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -128,7 +128,7 @@ SYSCALL(sys_sysinfo,sys_sysinfo,compat_sys_sysinfo_wrapper)
 SYSCALL(sys_ipc,sys_ipc,sys32_ipc_wrapper)
 SYSCALL(sys_fsync,sys_fsync,sys32_fsync_wrapper)
 SYSCALL(sys_sigreturn,sys_sigreturn,sys32_sigreturn)
-SYSCALL(sys_clone,sys_clone,sys32_clone)			/* 120 */
+SYSCALL(sys_clone,sys_clone,sys_clone_wrapper)			/* 120 */
 SYSCALL(sys_setdomainname,sys_setdomainname,sys32_setdomainname_wrapper)
 SYSCALL(sys_newuname,sys_s390_newuname,sys32_newuname_wrapper)
 NI_SYSCALL							/* modify_ldt for i386 */
-- 
cgit v1.2.2


From 3e86a8c617413e344143839c514e9b0c1713065c Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:42 +0200
Subject: [S390] Convert sys_execve to function with parameters.

Use function parameters instead of accessing the pt_regs structure
to get the parameters.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/kernel/compat_linux.c   | 33 ++++++++++++++-------------------
 arch/s390/kernel/compat_linux.h   |  3 ++-
 arch/s390/kernel/compat_wrapper.S |  7 +++++++
 arch/s390/kernel/entry.h          |  3 ++-
 arch/s390/kernel/process.c        | 30 +++++++++++++-----------------
 arch/s390/kernel/syscalls.S       |  2 +-
 6 files changed, 39 insertions(+), 39 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index f741cd49111a..05cf446e60b2 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -443,31 +443,26 @@ sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo)
  * sys32_execve() executes a new program after the asm stub has set
  * things up for us.  This should basically do what I want it to.
  */
-asmlinkage long sys32_execve(void)
+asmlinkage long sys32_execve(char __user *name, compat_uptr_t __user *argv,
+			     compat_uptr_t __user *envp)
 {
 	struct pt_regs *regs = task_pt_regs(current);
 	char *filename;
-	unsigned long result;
-	int rc;
-
-	filename = getname(compat_ptr(regs->orig_gpr2));
-	if (IS_ERR(filename)) {
-		result = PTR_ERR(filename);
-                goto out;
-	}
-	rc = compat_do_execve(filename, compat_ptr(regs->gprs[3]),
-			      compat_ptr(regs->gprs[4]), regs);
-	if (rc) {
-		result = rc;
-		goto out_putname;
-	}
+	long rc;
+
+	filename = getname(name);
+	rc = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		return rc;
+	rc = compat_do_execve(filename, argv, envp, regs);
+	if (rc)
+		goto out;
 	current->thread.fp_regs.fpc=0;
 	asm volatile("sfpc %0,0" : : "d" (0));
-	result = regs->gprs[2];
-out_putname:
-        putname(filename);
+	rc = regs->gprs[2];
 out:
-	return result;
+	putname(filename);
+	return rc;
 }
 
 
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index 7cceb67ff8a2..c07f9ca05ade 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -198,7 +198,8 @@ long sys32_rt_sigprocmask(int how, compat_sigset_t __user *set,
 			  compat_sigset_t __user *oset, size_t sigsetsize);
 long sys32_rt_sigpending(compat_sigset_t __user *set, size_t sigsetsize);
 long sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user *uinfo);
-long sys32_execve(void);
+long sys32_execve(char __user *name, compat_uptr_t __user *argv,
+		  compat_uptr_t __user *envp);
 long sys32_init_module(void __user *umod, unsigned long len,
 		       const char __user *uargs);
 long sys32_delete_module(const char __user *name_user, unsigned int flags);
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 28f8440d2ec3..8a6a7969c623 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1848,3 +1848,10 @@ sys_clone_wrapper:
 	llgtr	%r4,%r4			# int *
 	llgtr	%r5,%r5			# int *
 	jg	sys_clone		# branch to system call
+
+	.globl	sys32_execve_wrapper
+sys32_execve_wrapper:
+	llgtr	%r2,%r2			# char *
+	llgtr	%r3,%r3			# compat_uptr_t *
+	llgtr	%r4,%r4			# compat_uptr_t *
+	jg	sys32_execve		# branch to system call
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index 91fd78839c57..e1e5e767ab56 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -46,7 +46,8 @@ long sys_clone(unsigned long newsp, unsigned long clone_flags,
 	       int __user *parent_tidptr, int __user *child_tidptr);
 long sys_vfork(void);
 void execve_tail(void);
-long sys_execve(void);
+long sys_execve(char __user *name, char __user * __user *argv,
+		char __user * __user *envp);
 long sys_sigsuspend(int history0, int history1, old_sigset_t mask);
 long sys_sigaction(int sig, const struct old_sigaction __user *act,
 		   struct old_sigaction __user *oact);
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 189d978f76d6..59fe6ecc6ed3 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -32,6 +32,7 @@
 #include <linux/elfcore.h>
 #include <linux/kernel_stat.h>
 #include <linux/syscalls.h>
+#include <linux/compat.h>
 #include <asm/compat.h>
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -268,30 +269,25 @@ asmlinkage void execve_tail(void)
 /*
  * sys_execve() executes a new program.
  */
-SYSCALL_DEFINE0(execve)
+SYSCALL_DEFINE3(execve, char __user *, name, char __user * __user *, argv,
+		char __user * __user *, envp)
 {
 	struct pt_regs *regs = task_pt_regs(current);
 	char *filename;
-	unsigned long result;
-	int rc;
+	long rc;
 
-	filename = getname((char __user *) regs->orig_gpr2);
-	if (IS_ERR(filename)) {
-		result = PTR_ERR(filename);
+	filename = getname(name);
+	rc = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		return rc;
+	rc = do_execve(filename, argv, envp, regs);
+	if (rc)
 		goto out;
-	}
-	rc = do_execve(filename, (char __user * __user *) regs->gprs[3],
-		       (char __user * __user *) regs->gprs[4], regs);
-	if (rc) {
-		result = rc;
-		goto out_putname;
-	}
 	execve_tail();
-	result = regs->gprs[2];
-out_putname:
-	putname(filename);
+	rc = regs->gprs[2];
 out:
-	return result;
+	putname(filename);
+	return rc;
 }
 
 /*
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index ff79d58e0eb3..062dd8f92377 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -19,7 +19,7 @@ SYSCALL(sys_restart_syscall,sys_restart_syscall,sys_restart_syscall)
 SYSCALL(sys_creat,sys_creat,sys32_creat_wrapper)
 SYSCALL(sys_link,sys_link,sys32_link_wrapper)
 SYSCALL(sys_unlink,sys_unlink,sys32_unlink_wrapper)		/* 10 */
-SYSCALL(sys_execve,sys_execve,sys32_execve)
+SYSCALL(sys_execve,sys_execve,sys32_execve_wrapper)
 SYSCALL(sys_chdir,sys_chdir,sys32_chdir_wrapper)
 SYSCALL(sys_time,sys_ni_syscall,sys32_time_wrapper)		/* old time syscall */
 SYSCALL(sys_mknod,sys_mknod,sys32_mknod_wrapper)
-- 
cgit v1.2.2


From 2e50195f58ec045bc4601ec94478d957974f4aa4 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:43 +0200
Subject: [S390] Get rid of init_module/delete_module compat functions.

These functions aren't needed. Might be a leftover of the pre
cond_syscall time.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/kernel/compat_linux.c   | 33 ---------------------------------
 arch/s390/kernel/compat_wrapper.S | 12 ++++++------
 arch/s390/kernel/syscalls.S       |  4 ++--
 3 files changed, 8 insertions(+), 41 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 05cf446e60b2..5519cb745106 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -465,39 +465,6 @@ out:
 	return rc;
 }
 
-
-#ifdef CONFIG_MODULES
-
-asmlinkage long
-sys32_init_module(void __user *umod, unsigned long len,
-		const char __user *uargs)
-{
-	return sys_init_module(umod, len, uargs);
-}
-
-asmlinkage long
-sys32_delete_module(const char __user *name_user, unsigned int flags)
-{
-	return sys_delete_module(name_user, flags);
-}
-
-#else /* CONFIG_MODULES */
-
-asmlinkage long
-sys32_init_module(void __user *umod, unsigned long len,
-		const char __user *uargs)
-{
-	return -ENOSYS;
-}
-
-asmlinkage long
-sys32_delete_module(const char __user *name_user, unsigned int flags)
-{
-	return -ENOSYS;
-}
-
-#endif  /* CONFIG_MODULES */
-
 asmlinkage long sys32_pread64(unsigned int fd, char __user *ubuf,
 				size_t count, u32 poshi, u32 poslo)
 {
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 8a6a7969c623..682fb69dba21 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -568,18 +568,18 @@ compat_sys_sigprocmask_wrapper:
 	llgtr	%r4,%r4			# compat_old_sigset_t *
 	jg	compat_sys_sigprocmask		# branch to system call
 
-	.globl	sys32_init_module_wrapper
-sys32_init_module_wrapper:
+	.globl	sys_init_module_wrapper
+sys_init_module_wrapper:
 	llgtr	%r2,%r2			# void *
 	llgfr	%r3,%r3			# unsigned long
 	llgtr	%r4,%r4			# char *
-	jg	sys32_init_module	# branch to system call
+	jg	sys_init_module		# branch to system call
 
-	.globl	sys32_delete_module_wrapper
-sys32_delete_module_wrapper:
+	.globl	sys_delete_module_wrapper
+sys_delete_module_wrapper:
 	llgtr	%r2,%r2			# const char *
 	llgfr	%r3,%r3			# unsigned int
-	jg	sys32_delete_module	# branch to system call
+	jg	sys_delete_module	# branch to system call
 
 	.globl	sys32_quotactl_wrapper
 sys32_quotactl_wrapper:
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 062dd8f92377..30eca070d426 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -136,8 +136,8 @@ SYSCALL(sys_adjtimex,sys_adjtimex,compat_sys_adjtimex_wrapper)
 SYSCALL(sys_mprotect,sys_mprotect,sys32_mprotect_wrapper)	/* 125 */
 SYSCALL(sys_sigprocmask,sys_sigprocmask,compat_sys_sigprocmask_wrapper)
 NI_SYSCALL							/* old "create module" */
-SYSCALL(sys_init_module,sys_init_module,sys32_init_module_wrapper)
-SYSCALL(sys_delete_module,sys_delete_module,sys32_delete_module_wrapper)
+SYSCALL(sys_init_module,sys_init_module,sys_init_module_wrapper)
+SYSCALL(sys_delete_module,sys_delete_module,sys_delete_module_wrapper)
 NI_SYSCALL							/* 130: old get_kernel_syms */
 SYSCALL(sys_quotactl,sys_quotactl,sys32_quotactl_wrapper)
 SYSCALL(sys_getpgid,sys_getpgid,sys32_getpgid_wrapper)
-- 
cgit v1.2.2


From 846955c8afe5ebca2f8841b042ca3342e08a092b Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:44 +0200
Subject: [S390] hibernation: fix guest page hinting related crash

On resume the system that loads the to be resumed image might have
unstable pages.
When the resume image is copied back and a write access happen to an
unstable page this causes an exception and the system crashes.

To fix this set all free pages to stable before copying the resumed
image data. Also after everything has been restored set all free
pages of the resumed system to unstable again.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/kernel/swsusp_asm64.S |  7 ++++++
 arch/s390/mm/page-states.c      | 52 ++++++++++++++++++++++++++++++++++-------
 2 files changed, 51 insertions(+), 8 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/kernel/swsusp_asm64.S b/arch/s390/kernel/swsusp_asm64.S
index 7cd6b096f0d1..9a86ccb91a8a 100644
--- a/arch/s390/kernel/swsusp_asm64.S
+++ b/arch/s390/kernel/swsusp_asm64.S
@@ -102,6 +102,9 @@ swsusp_arch_resume:
 	aghi	%r15,-STACK_FRAME_OVERHEAD
 	stg	%r1,__SF_BACKCHAIN(%r15)
 
+	/* Make all free pages stable */
+	lghi	%r2,1
+	brasl	%r14,arch_set_page_states
 #ifdef CONFIG_SMP
 	/* Save boot cpu number */
 	brasl	%r14,smp_get_phys_cpu_id
@@ -178,6 +181,10 @@ swsusp_arch_resume:
 	/* Activate DAT */
 	stosm	__SF_EMPTY(%r15),0x04
 
+	/* Make all free pages unstable */
+	lghi	%r2,0
+	brasl	%r14,arch_set_page_states
+
 	/* Return 0 */
 	lmg	%r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
 	lghi	%r2,0
diff --git a/arch/s390/mm/page-states.c b/arch/s390/mm/page-states.c
index f92ec203ad92..098923ae458f 100644
--- a/arch/s390/mm/page-states.c
+++ b/arch/s390/mm/page-states.c
@@ -50,28 +50,64 @@ void __init cmma_init(void)
 		cmma_flag = 0;
 }
 
-void arch_free_page(struct page *page, int order)
+static inline void set_page_unstable(struct page *page, int order)
 {
 	int i, rc;
 
-	if (!cmma_flag)
-		return;
 	for (i = 0; i < (1 << order); i++)
 		asm volatile(".insn rrf,0xb9ab0000,%0,%1,%2,0"
 			     : "=&d" (rc)
-			     : "a" ((page_to_pfn(page) + i) << PAGE_SHIFT),
+			     : "a" (page_to_phys(page + i)),
 			       "i" (ESSA_SET_UNUSED));
 }
 
-void arch_alloc_page(struct page *page, int order)
+void arch_free_page(struct page *page, int order)
 {
-	int i, rc;
-
 	if (!cmma_flag)
 		return;
+	set_page_unstable(page, order);
+}
+
+static inline void set_page_stable(struct page *page, int order)
+{
+	int i, rc;
+
 	for (i = 0; i < (1 << order); i++)
 		asm volatile(".insn rrf,0xb9ab0000,%0,%1,%2,0"
 			     : "=&d" (rc)
-			     : "a" ((page_to_pfn(page) + i) << PAGE_SHIFT),
+			     : "a" (page_to_phys(page + i)),
 			       "i" (ESSA_SET_STABLE));
 }
+
+void arch_alloc_page(struct page *page, int order)
+{
+	if (!cmma_flag)
+		return;
+	set_page_stable(page, order);
+}
+
+void arch_set_page_states(int make_stable)
+{
+	unsigned long flags, order, t;
+	struct list_head *l;
+	struct page *page;
+	struct zone *zone;
+
+	if (!cmma_flag)
+		return;
+	if (make_stable)
+		drain_local_pages(NULL);
+	for_each_populated_zone(zone) {
+		spin_lock_irqsave(&zone->lock, flags);
+		for_each_migratetype_order(order, t) {
+			list_for_each(l, &zone->free_area[order].free_list[t]) {
+				page = list_entry(l, struct page, lru);
+				if (make_stable)
+					set_page_stable(page, order);
+				else
+					set_page_unstable(page, order);
+			}
+		}
+		spin_unlock_irqrestore(&zone->lock, flags);
+	}
+}
-- 
cgit v1.2.2


From 2583d1efe04170cf166d43da6e4ed309e5601e84 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:45 +0200
Subject: [S390] hibernation: reset system after resume

Force system into defined state after resume.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/kernel/swsusp_asm64.S | 42 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 40 insertions(+), 2 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/kernel/swsusp_asm64.S b/arch/s390/kernel/swsusp_asm64.S
index 9a86ccb91a8a..fc056810a017 100644
--- a/arch/s390/kernel/swsusp_asm64.S
+++ b/arch/s390/kernel/swsusp_asm64.S
@@ -108,7 +108,8 @@ swsusp_arch_resume:
 #ifdef CONFIG_SMP
 	/* Save boot cpu number */
 	brasl	%r14,smp_get_phys_cpu_id
-	lgr	%r10,%r2
+	larl	%r1,saved_cpu_id
+	st	%r2,0(%r1)
 #endif
 	/* Deactivate DAT */
 	stnsm	__SF_EMPTY(%r15),0xfb
@@ -136,6 +137,29 @@ swsusp_arch_resume:
 2:
 	ptlb				/* flush tlb */
 
+	/* Reset System */
+	larl	%r1,restart_entry
+	larl	%r2,restart_psw
+	og	%r1,0(%r2)
+	stg	%r1,0(%r0)
+	larl	%r1,saved_pgm_check_psw
+	mvc	0(16,%r1),__LC_PGM_NEW_PSW(%r0)
+	larl	%r1,new_pgm_check_psw
+	epsw	%r2,%r3
+	stm	%r2,%r3,0(%r1)
+	mvc	__LC_PGM_NEW_PSW(16,%r0),0(%r1)
+	lghi	%r0,0
+	diag	%r0,%r0,0x308
+restart_entry:
+	lhi	%r1,1
+	sigp	%r1,%r0,0x12
+	sam64
+	larl	%r1,new_pgm_check_psw
+	lpswe	0(%r1)
+pgm_check_entry:
+	larl	%r1,saved_pgm_check_psw
+	mvc	__LC_PGM_NEW_PSW(16,%r0),0(%r1)
+
 	/* Restore registers */
 	lghi	%r13,0x1000		/* %r1 = pointer to save arae */
 
@@ -171,7 +195,8 @@ swsusp_arch_resume:
 
 #ifdef CONFIG_SMP
 	/* Switch CPUs */
-	lgr	%r2,%r10		/* get cpu id */
+	larl	%r1,saved_cpu_id
+	llgf	%r2,0(%r1)
 	llgf	%r3,0x318(%r13)
 	brasl	%r14,smp_switch_boot_cpu_in_resume
 #endif
@@ -189,3 +214,16 @@ swsusp_arch_resume:
 	lmg	%r6,%r15,STACK_FRAME_OVERHEAD + __SF_GPRS(%r15)
 	lghi	%r2,0
 	br	%r14
+
+	.section .data.nosave,"aw",@progbits
+	.align	8
+restart_psw:
+	.long	0x00080000,0x80000000
+new_pgm_check_psw:
+	.quad	0,pgm_check_entry
+saved_pgm_check_psw:
+	.quad	0,0
+#ifdef CONFIG_SMP
+saved_cpu_id:
+	.long	0
+#endif
-- 
cgit v1.2.2


From 87458ff4582953d6b3bf45edeac8582849552e69 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:46 +0200
Subject: [S390] Change kernel_page_present coding style.

Make the inline assembly look like all others.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/mm/pgtable.c | 17 +++++++----------
 1 file changed, 7 insertions(+), 10 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index c70215247071..c60bfb309ce6 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -314,21 +314,18 @@ int s390_enable_sie(void)
 }
 EXPORT_SYMBOL_GPL(s390_enable_sie);
 
-#ifdef CONFIG_DEBUG_PAGEALLOC
-#ifdef CONFIG_HIBERNATION
+#if defined(CONFIG_DEBUG_PAGEALLOC) && defined(CONFIG_HIBERNATION)
 bool kernel_page_present(struct page *page)
 {
 	unsigned long addr;
 	int cc;
 
 	addr = page_to_phys(page);
-	asm("lra %1,0(%1)\n"
-	    "ipm %0\n"
-	    "srl %0,28"
-	    :"=d"(cc),"+a"(addr)::"cc");
+	asm volatile(
+		"	lra	%1,0(%1)\n"
+		"	ipm	%0\n"
+		"	srl	%0,28"
+		: "=d" (cc), "+a" (addr) : : "cc");
 	return cc == 0;
 }
-
-#endif /* CONFIG_HIBERNATION */
-#endif /* CONFIG_DEBUG_PAGEALLOC */
-
+#endif /* CONFIG_HIBERNATION && CONFIG_DEBUG_PAGEALLOC */
-- 
cgit v1.2.2


From bdd42b28cde0453fb8c3d9b4e4868ca2d8124806 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:47 +0200
Subject: [S390] fix disabled_wait inline assembly clobber list

The disabled_wait inline assmembly also clobbers register r1, but it
is missing in the clobber list.
Fixes recursive Oops on panic.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/include/asm/processor.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch')

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index cf8eed3fa779..b42715458312 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -295,7 +295,7 @@ static inline void ATTRIB_NORET disabled_wait(unsigned long code)
 		"	oi	0x384(1),0x10\n"/* fake protection bit */
 		"	lpswe	0(%1)"
 		: "=m" (ctl_buf)
-		: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0");
+		: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0", "1");
 #endif /* __s390x__ */
 	while (1);
 }
-- 
cgit v1.2.2


From 07805ac81c81634623042408ffea6bbad3160bfa Mon Sep 17 00:00:00 2001
From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:48 +0200
Subject: [S390] ptrace: use common code for simple peek/poke operations

arch_ptrace on s390 implements PTRACE_(PEEK|POKE)(TEXT|DATA) instead of
using using ptrace_request in kernel/ptrace.c.
The only reason is the 31bit addressing mode, where we have to unmask the
highest bit.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/kernel/ptrace.c | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index f3ddd7ac06c5..a8738676b26c 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -339,24 +339,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 	int copied, ret;
 
 	switch (request) {
-	case PTRACE_PEEKTEXT:
-	case PTRACE_PEEKDATA:
-		/* Remove high order bit from address (only for 31 bit). */
-		addr &= PSW_ADDR_INSN;
-		/* read word at location addr. */
-		return generic_ptrace_peekdata(child, addr, data);
-
 	case PTRACE_PEEKUSR:
 		/* read the word at location addr in the USER area. */
 		return peek_user(child, addr, data);
 
-	case PTRACE_POKETEXT:
-	case PTRACE_POKEDATA:
-		/* Remove high order bit from address (only for 31 bit). */
-		addr &= PSW_ADDR_INSN;
-		/* write the word at location addr. */
-		return generic_ptrace_pokedata(child, addr, data);
-
 	case PTRACE_POKEUSR:
 		/* write the word at location addr in the USER area */
 		return poke_user(child, addr, data);
@@ -386,8 +372,11 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
 			copied += sizeof(unsigned long);
 		}
 		return 0;
+	default:
+		/* Removing high order bit from addr (only for 31 bit). */
+		addr &= PSW_ADDR_INSN;
+		return ptrace_request(child, request, addr, data);
 	}
-	return ptrace_request(child, request, addr, data);
 }
 
 #ifdef CONFIG_COMPAT
-- 
cgit v1.2.2


From 3fd26a7793fb21b88ccf1e238670b2a508fcf835 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:49 +0200
Subject: [S390] smp: introduce LC_ORDER and simplify lowcore handling

Removes a couple of simple code duplications. But before I have to do
this again, just simplify it.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/include/asm/lowcore.h |  6 ++++++
 arch/s390/kernel/smp.c          | 14 ++++----------
 2 files changed, 10 insertions(+), 10 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 6bc9426a6fbf..8c5570366a0e 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -189,6 +189,12 @@ union save_area {
 #define SAVE_AREA_BASE SAVE_AREA_BASE_S390X
 #endif
 
+#ifndef __s390x__
+#define LC_ORDER 0
+#else
+#define LC_ORDER 1
+#endif
+
 struct _lowcore
 {
 #ifndef __s390x__
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 56c16876b919..6f14734abe72 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -475,10 +475,8 @@ static int __cpuinit smp_alloc_lowcore(int cpu)
 {
 	unsigned long async_stack, panic_stack;
 	struct _lowcore *lowcore;
-	int lc_order;
 
-	lc_order = sizeof(long) == 8 ? 1 : 0;
-	lowcore = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, lc_order);
+	lowcore = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, LC_ORDER);
 	if (!lowcore)
 		return -ENOMEM;
 	async_stack = __get_free_pages(GFP_KERNEL, ASYNC_ORDER);
@@ -509,16 +507,14 @@ static int __cpuinit smp_alloc_lowcore(int cpu)
 out:
 	free_page(panic_stack);
 	free_pages(async_stack, ASYNC_ORDER);
-	free_pages((unsigned long) lowcore, lc_order);
+	free_pages((unsigned long) lowcore, LC_ORDER);
 	return -ENOMEM;
 }
 
 static void smp_free_lowcore(int cpu)
 {
 	struct _lowcore *lowcore;
-	int lc_order;
 
-	lc_order = sizeof(long) == 8 ? 1 : 0;
 	lowcore = lowcore_ptr[cpu];
 #ifndef CONFIG_64BIT
 	if (MACHINE_HAS_IEEE)
@@ -528,7 +524,7 @@ static void smp_free_lowcore(int cpu)
 #endif
 	free_page(lowcore->panic_stack - PAGE_SIZE);
 	free_pages(lowcore->async_stack - ASYNC_SIZE, ASYNC_ORDER);
-	free_pages((unsigned long) lowcore, lc_order);
+	free_pages((unsigned long) lowcore, LC_ORDER);
 	lowcore_ptr[cpu] = NULL;
 }
 
@@ -664,7 +660,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	unsigned long async_stack, panic_stack;
 	struct _lowcore *lowcore;
 	unsigned int cpu;
-	int lc_order;
 
 	smp_detect_cpus();
 
@@ -674,8 +669,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
 	print_cpu_info();
 
 	/* Reallocate current lowcore, but keep its contents. */
-	lc_order = sizeof(long) == 8 ? 1 : 0;
-	lowcore = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, lc_order);
+	lowcore = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, LC_ORDER);
 	panic_stack = __get_free_page(GFP_KERNEL);
 	async_stack = __get_free_pages(GFP_KERNEL, ASYNC_ORDER);
 	BUG_ON(!lowcore || !panic_stack || !async_stack);
-- 
cgit v1.2.2


From 2573a575304c5ce4765fc88f9d09ed4dbf8d04bf Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:50 +0200
Subject: [S390] hibernate: make sure pfn_is_nosave handles lowcore pages

pfn_is_nosave doesn't return the correct value for the second lowcore
page if lowcore protection is enabled. Make sure it always returns
the correct value.

While at it simplify the whole thing.
NSS special handling is done by the tprot check like it already works
for DCSS as well. So remove the extra code for NSS.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/include/asm/lowcore.h |  2 ++
 arch/s390/kernel/suspend.c      | 24 +++++++-----------------
 2 files changed, 9 insertions(+), 17 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 8c5570366a0e..a3ff9b01bf7d 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -195,6 +195,8 @@ union save_area {
 #define LC_ORDER 1
 #endif
 
+#define LC_PAGES (1UL << LC_ORDER)
+
 struct _lowcore
 {
 #ifndef __s390x__
diff --git a/arch/s390/kernel/suspend.c b/arch/s390/kernel/suspend.c
index 086bee970cae..cf9e5c6d5527 100644
--- a/arch/s390/kernel/suspend.c
+++ b/arch/s390/kernel/suspend.c
@@ -6,36 +6,26 @@
  * Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
  */
 
-#include <linux/suspend.h>
-#include <linux/reboot.h>
 #include <linux/pfn.h>
-#include <linux/mm.h>
-#include <asm/sections.h>
 #include <asm/system.h>
-#include <asm/ipl.h>
 
 /*
  * References to section boundaries
  */
 extern const void __nosave_begin, __nosave_end;
 
-/*
- *  check if given pfn is in the 'nosave' or in the read only NSS section
- */
 int pfn_is_nosave(unsigned long pfn)
 {
-	unsigned long nosave_begin_pfn = __pa(&__nosave_begin) >> PAGE_SHIFT;
-	unsigned long nosave_end_pfn = PAGE_ALIGN(__pa(&__nosave_end))
-					>> PAGE_SHIFT;
-	unsigned long eshared_pfn = PFN_DOWN(__pa(&_eshared)) - 1;
-	unsigned long stext_pfn = PFN_DOWN(__pa(&_stext));
+	unsigned long nosave_begin_pfn = PFN_DOWN(__pa(&__nosave_begin));
+	unsigned long nosave_end_pfn = PFN_DOWN(__pa(&__nosave_end));
 
+	/* Always save lowcore pages (LC protection might be enabled). */
+	if (pfn <= LC_PAGES)
+		return 0;
 	if (pfn >= nosave_begin_pfn && pfn < nosave_end_pfn)
 		return 1;
-	if (pfn >= stext_pfn && pfn <= eshared_pfn) {
-		if (ipl_info.type == IPL_TYPE_NSS)
-			return 1;
-	} else if ((tprot(pfn * PAGE_SIZE) && pfn > 0))
+	/* Skip memory holes and read-only pages (NSS, DCSS, ...). */
+	if (tprot(PFN_PHYS(pfn)))
 		return 1;
 	return 0;
 }
-- 
cgit v1.2.2


From 1aaf179d043856d80bbb354f9feaf706b9cfbcd3 Mon Sep 17 00:00:00 2001
From: Michael Holzheu <michael.holzheu@linux.vnet.ibm.com>
Date: Tue, 22 Sep 2009 22:58:53 +0200
Subject: [S390] hibernate: Do real CPU swap at resume time

Currently, when the physical resume CPU is not equal to the physical suspend
CPU, we swap the CPUs logically, by modifying the logical/physical CPU mapping.
This has two major drawbacks: First the change is visible from user space (e.g.
CPU sysfs files) and second it is hard to ensure that nowhere in the kernel
the physical CPU ID is stored before suspend.
To fix this, we now really swap the physical CPUs, if the resume CPU is not
the pysical suspend CPU. We restart the suspend CPU and stop the resume CPU
using SIGP restart and SIGP stop. If the suspend CPU is no longer available,
we write a message and load a disabled wait PSW.

Signed-off-by: Michael Holzheu <michael.holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/include/asm/lowcore.h |  1 +
 arch/s390/kernel/asm-offsets.c  |  7 +++-
 arch/s390/kernel/sclp.S         |  5 +--
 arch/s390/kernel/smp.c          | 36 ----------------
 arch/s390/kernel/swsusp_asm64.S | 91 ++++++++++++++++++++++++++++-------------
 5 files changed, 71 insertions(+), 69 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index a3ff9b01bf7d..f2ef4b619ce1 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -86,6 +86,7 @@
 #define __LC_PGM_OLD_PSW		0x0150
 #define __LC_MCK_OLD_PSW		0x0160
 #define __LC_IO_OLD_PSW			0x0170
+#define __LC_RESTART_PSW		0x01a0
 #define __LC_EXT_NEW_PSW		0x01b0
 #define __LC_SVC_NEW_PSW		0x01c0
 #define __LC_PGM_NEW_PSW		0x01d0
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index fa9905ce7d0b..63e46433e81d 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -7,6 +7,7 @@
 #include <linux/sched.h>
 #include <linux/kbuild.h>
 #include <asm/vdso.h>
+#include <asm/sigp.h>
 
 int main(void)
 {
@@ -59,6 +60,10 @@ int main(void)
 	DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
 	DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
 	DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
-
+	/* constants for SIGP */
+	DEFINE(__SIGP_STOP, sigp_stop);
+	DEFINE(__SIGP_RESTART, sigp_restart);
+	DEFINE(__SIGP_SENSE, sigp_sense);
+	DEFINE(__SIGP_INITIAL_CPU_RESET, sigp_initial_cpu_reset);
 	return 0;
 }
diff --git a/arch/s390/kernel/sclp.S b/arch/s390/kernel/sclp.S
index 20639dfe0c42..e27ca63076d1 100644
--- a/arch/s390/kernel/sclp.S
+++ b/arch/s390/kernel/sclp.S
@@ -24,8 +24,6 @@ LC_EXT_INT_CODE		= 0x86			# addr of ext int code
 #   R3	= external interruption parameter if R2=0
 #
 
-.section ".init.text","ax"
-
 _sclp_wait_int:
 	stm	%r6,%r15,24(%r15)		# save registers
 	basr	%r13,0				# get base register
@@ -318,9 +316,8 @@ _sclp_print_early:
 	.long	_sclp_work_area
 .Lascebc:
 	.long	_ascebc
-.previous
 
-.section ".init.data","a"
+.section .data,"aw",@progbits
 	.balign 4096
 _sclp_work_area:
 	.fill	4096
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 6f14734abe72..b4b6396e6cf0 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -1041,42 +1041,6 @@ out:
 static SYSDEV_CLASS_ATTR(dispatching, 0644, dispatching_show,
 			 dispatching_store);
 
-/*
- * If the resume kernel runs on another cpu than the suspended kernel,
- * we have to switch the cpu IDs in the logical map.
- */
-void smp_switch_boot_cpu_in_resume(u32 resume_phys_cpu_id,
-				   struct _lowcore *suspend_lowcore)
-{
-	int cpu, suspend_cpu_id, resume_cpu_id;
-	u32 suspend_phys_cpu_id;
-
-	suspend_phys_cpu_id = __cpu_logical_map[suspend_lowcore->cpu_nr];
-	suspend_cpu_id = suspend_lowcore->cpu_nr;
-
-	for_each_present_cpu(cpu) {
-		if (__cpu_logical_map[cpu] == resume_phys_cpu_id) {
-			resume_cpu_id = cpu;
-			goto found;
-		}
-	}
-	panic("Could not find resume cpu in logical map.\n");
-
-found:
-	printk("Resume  cpu ID: %i/%i\n", resume_phys_cpu_id, resume_cpu_id);
-	printk("Suspend cpu ID: %i/%i\n", suspend_phys_cpu_id, suspend_cpu_id);
-
-	__cpu_logical_map[resume_cpu_id] = suspend_phys_cpu_id;
-	__cpu_logical_map[suspend_cpu_id] = resume_phys_cpu_id;
-
-	lowcore_ptr[suspend_cpu_id]->cpu_addr = resume_phys_cpu_id;
-}
-
-u32 smp_get_phys_cpu_id(void)
-{
-	return __cpu_logical_map[smp_processor_id()];
-}
-
 static int __init topology_init(void)
 {
 	int cpu;
diff --git a/arch/s390/kernel/swsusp_asm64.S b/arch/s390/kernel/swsusp_asm64.S
index fc056810a017..fe927d0bc20b 100644
--- a/arch/s390/kernel/swsusp_asm64.S
+++ b/arch/s390/kernel/swsusp_asm64.S
@@ -9,6 +9,7 @@
 
 #include <asm/page.h>
 #include <asm/ptrace.h>
+#include <asm/thread_info.h>
 #include <asm/asm-offsets.h>
 
 /*
@@ -41,6 +42,9 @@ swsusp_arch_suspend:
 	/* Get pointer to save area */
 	lghi	%r1,0x1000
 
+	/* Save CPU address */
+	stap	__LC_CPU_ADDRESS(%r1)
+
 	/* Store registers */
 	mvc	0x318(4,%r1),__SF_EMPTY(%r15)	/* move prefix to lowcore */
 	stfpc	0x31c(%r1)			/* store fpu control */
@@ -105,12 +109,7 @@ swsusp_arch_resume:
 	/* Make all free pages stable */
 	lghi	%r2,1
 	brasl	%r14,arch_set_page_states
-#ifdef CONFIG_SMP
-	/* Save boot cpu number */
-	brasl	%r14,smp_get_phys_cpu_id
-	larl	%r1,saved_cpu_id
-	st	%r2,0(%r1)
-#endif
+
 	/* Deactivate DAT */
 	stnsm	__SF_EMPTY(%r15),0xfb
 
@@ -139,12 +138,10 @@ swsusp_arch_resume:
 
 	/* Reset System */
 	larl	%r1,restart_entry
-	larl	%r2,restart_psw
+	larl	%r2,.Lrestart_diag308_psw
 	og	%r1,0(%r2)
 	stg	%r1,0(%r0)
-	larl	%r1,saved_pgm_check_psw
-	mvc	0(16,%r1),__LC_PGM_NEW_PSW(%r0)
-	larl	%r1,new_pgm_check_psw
+	larl	%r1,.Lnew_pgm_check_psw
 	epsw	%r2,%r3
 	stm	%r2,%r3,0(%r1)
 	mvc	__LC_PGM_NEW_PSW(16,%r0),0(%r1)
@@ -154,12 +151,54 @@ restart_entry:
 	lhi	%r1,1
 	sigp	%r1,%r0,0x12
 	sam64
-	larl	%r1,new_pgm_check_psw
+	larl	%r1,.Lnew_pgm_check_psw
 	lpswe	0(%r1)
 pgm_check_entry:
-	larl	%r1,saved_pgm_check_psw
-	mvc	__LC_PGM_NEW_PSW(16,%r0),0(%r1)
 
+	/* Switch to original suspend CPU */
+	larl	%r1,.Lresume_cpu		/* Resume CPU address: r2 */
+	stap	0(%r1)
+	llgh	%r2,0(%r1)
+	lghi	%r3,0x1000
+	llgh	%r1,__LC_CPU_ADDRESS(%r3)	/* Suspend CPU address: r1 */
+	cgr	%r1,%r2
+	je	restore_registers		/* r1 = r2 -> nothing to do */
+	larl	%r4,.Lrestart_suspend_psw	/* Set new restart PSW */
+	mvc	__LC_RESTART_PSW(16,%r0),0(%r4)
+3:
+	sigp	%r9,%r1,__SIGP_INITIAL_CPU_RESET
+	brc	8,4f	/* accepted */
+	brc	2,3b	/* busy, try again */
+
+	/* Suspend CPU not available -> panic */
+	larl	%r15,init_thread_union
+	ahi	%r15,1<<(PAGE_SHIFT+THREAD_ORDER)
+	larl	%r2,.Lpanic_string
+	larl	%r3,_sclp_print_early
+	lghi	%r1,0
+	sam31
+	sigp	%r1,%r0,0x12
+	basr	%r14,%r3
+	larl	%r3,.Ldisabled_wait_31
+	lpsw	0(%r3)
+4:
+	/* Switch to suspend CPU */
+	sigp	%r9,%r1,__SIGP_RESTART	/* start suspend CPU */
+	brc	2,4b			/* busy, try again */
+5:
+	sigp	%r9,%r2,__SIGP_STOP	/* stop resume (current) CPU */
+6:	j	6b
+
+restart_suspend:
+	larl	%r1,.Lresume_cpu
+	llgh	%r2,0(%r1)
+7:
+	sigp	%r9,%r2,__SIGP_SENSE	/* Wait for resume CPU */
+	brc	2,7b			/* busy, try again */
+	tmll	%r9,0x40		/* Test if resume CPU is stopped */
+	jz	7b
+
+restore_registers:
 	/* Restore registers */
 	lghi	%r13,0x1000		/* %r1 = pointer to save arae */
 
@@ -193,13 +232,6 @@ pgm_check_entry:
 	/* Pointer to save area */
 	lghi	%r13,0x1000
 
-#ifdef CONFIG_SMP
-	/* Switch CPUs */
-	larl	%r1,saved_cpu_id
-	llgf	%r2,0(%r1)
-	llgf	%r3,0x318(%r13)
-	brasl	%r14,smp_switch_boot_cpu_in_resume
-#endif
 	/* Restore prefix register */
 	spx	0x318(%r13)
 
@@ -217,13 +249,16 @@ pgm_check_entry:
 
 	.section .data.nosave,"aw",@progbits
 	.align	8
-restart_psw:
+.Ldisabled_wait_31:
+	.long  0x000a0000,0x00000000
+.Lpanic_string:
+	.asciz	"Resume not possible because suspend CPU is no longer available"
+	.align	8
+.Lrestart_diag308_psw:
 	.long	0x00080000,0x80000000
-new_pgm_check_psw:
+.Lrestart_suspend_psw:
+	.quad	0x0000000180000000,restart_suspend
+.Lnew_pgm_check_psw:
 	.quad	0,pgm_check_entry
-saved_pgm_check_psw:
-	.quad	0,0
-#ifdef CONFIG_SMP
-saved_cpu_id:
-	.long	0
-#endif
+.Lresume_cpu:
+	.byte	0,0
-- 
cgit v1.2.2


From ed87b27e00d2ca240f62f3903583a2f1541fb9ef Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Tue, 22 Sep 2009 22:58:54 +0200
Subject: [S390] Update default configuration.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/defconfig | 37 +++++++++++++++++++++++++------------
 1 file changed, 25 insertions(+), 12 deletions(-)

(limited to 'arch')

diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index 4e91a2573cc4..ab4464486b7a 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
-# Linux kernel version: 2.6.30
-# Mon Jun 22 11:08:16 2009
+# Linux kernel version: 2.6.31
+# Tue Sep 22 17:43:13 2009
 #
 CONFIG_SCHED_MC=y
 CONFIG_MMU=y
@@ -24,6 +24,7 @@ CONFIG_PGSTE=y
 CONFIG_VIRT_CPU_ACCOUNTING=y
 CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
 CONFIG_S390=y
+CONFIG_SCHED_OMIT_FRAME_POINTER=y
 CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
 CONFIG_CONSTRUCTORS=y
 
@@ -48,11 +49,12 @@ CONFIG_AUDIT=y
 #
 # RCU Subsystem
 #
-CONFIG_CLASSIC_RCU=y
-# CONFIG_TREE_RCU is not set
-# CONFIG_PREEMPT_RCU is not set
+CONFIG_TREE_RCU=y
+# CONFIG_TREE_PREEMPT_RCU is not set
+# CONFIG_RCU_TRACE is not set
+CONFIG_RCU_FANOUT=64
+# CONFIG_RCU_FANOUT_EXACT is not set
 # CONFIG_TREE_RCU_TRACE is not set
-# CONFIG_PREEMPT_RCU_TRACE is not set
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=17
@@ -103,11 +105,12 @@ CONFIG_TIMERFD=y
 CONFIG_EVENTFD=y
 CONFIG_SHMEM=y
 CONFIG_AIO=y
-CONFIG_HAVE_PERF_COUNTERS=y
+CONFIG_HAVE_PERF_EVENTS=y
 
 #
-# Performance Counters
+# Kernel Performance Events And Counters
 #
+# CONFIG_PERF_EVENTS is not set
 # CONFIG_PERF_COUNTERS is not set
 CONFIG_VM_EVENT_COUNTERS=y
 # CONFIG_STRIP_ASM_SYMS is not set
@@ -116,7 +119,6 @@ CONFIG_SLAB=y
 # CONFIG_SLUB is not set
 # CONFIG_SLOB is not set
 # CONFIG_PROFILING is not set
-# CONFIG_MARKERS is not set
 CONFIG_HAVE_OPROFILE=y
 CONFIG_KPROBES=y
 CONFIG_HAVE_SYSCALL_WRAPPERS=y
@@ -176,6 +178,7 @@ CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
 CONFIG_64BIT=y
+# CONFIG_KTIME_SCALAR is not set
 CONFIG_SMP=y
 CONFIG_NR_CPUS=32
 CONFIG_HOTPLUG_CPU=y
@@ -257,7 +260,6 @@ CONFIG_FORCE_MAX_ZONEORDER=9
 CONFIG_PFAULT=y
 # CONFIG_SHARED_KERNEL is not set
 # CONFIG_CMM is not set
-# CONFIG_PAGE_STATES is not set
 # CONFIG_APPLDATA_BASE is not set
 CONFIG_HZ_100=y
 # CONFIG_HZ_250 is not set
@@ -280,6 +282,7 @@ CONFIG_PM_SLEEP_SMP=y
 CONFIG_PM_SLEEP=y
 CONFIG_HIBERNATION=y
 CONFIG_PM_STD_PARTITION=""
+# CONFIG_PM_RUNTIME is not set
 CONFIG_NET=y
 
 #
@@ -394,6 +397,7 @@ CONFIG_IP_SCTP=m
 # CONFIG_SCTP_HMAC_NONE is not set
 # CONFIG_SCTP_HMAC_SHA1 is not set
 CONFIG_SCTP_HMAC_MD5=y
+# CONFIG_RDS is not set
 # CONFIG_TIPC is not set
 # CONFIG_ATM is not set
 # CONFIG_BRIDGE is not set
@@ -487,6 +491,7 @@ CONFIG_CCW=y
 # Generic Driver Options
 #
 CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+# CONFIG_DEVTMPFS is not set
 CONFIG_STANDALONE=y
 CONFIG_PREVENT_FIRMWARE_BUILD=y
 CONFIG_FW_LOADER=y
@@ -501,6 +506,7 @@ CONFIG_BLK_DEV=y
 CONFIG_BLK_DEV_LOOP=m
 # CONFIG_BLK_DEV_CRYPTOLOOP is not set
 CONFIG_BLK_DEV_NBD=m
+# CONFIG_BLK_DEV_OSD is not set
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=16
 CONFIG_BLK_DEV_RAM_SIZE=4096
@@ -594,8 +600,11 @@ CONFIG_BLK_DEV_DM=y
 CONFIG_DM_CRYPT=y
 CONFIG_DM_SNAPSHOT=y
 CONFIG_DM_MIRROR=y
+# CONFIG_DM_LOG_USERSPACE is not set
 CONFIG_DM_ZERO=y
 CONFIG_DM_MULTIPATH=m
+# CONFIG_DM_MULTIPATH_QL is not set
+# CONFIG_DM_MULTIPATH_ST is not set
 # CONFIG_DM_DELAY is not set
 # CONFIG_DM_UEVENT is not set
 CONFIG_NETDEVICES=y
@@ -615,7 +624,6 @@ CONFIG_NET_ETHERNET=y
 # CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL is not set
 # CONFIG_IBM_NEW_EMAC_MAL_CLR_ICINTSTAT is not set
 # CONFIG_IBM_NEW_EMAC_MAL_COMMON_ERR is not set
-# CONFIG_KS8842 is not set
 CONFIG_NETDEV_1000=y
 CONFIG_NETDEV_10000=y
 # CONFIG_TR is not set
@@ -678,6 +686,7 @@ CONFIG_SCLP_CONSOLE=y
 CONFIG_SCLP_VT220_TTY=y
 CONFIG_SCLP_VT220_CONSOLE=y
 CONFIG_SCLP_CPI=m
+CONFIG_SCLP_ASYNC=m
 CONFIG_S390_TAPE=m
 
 #
@@ -737,6 +746,7 @@ CONFIG_FS_POSIX_ACL=y
 # CONFIG_GFS2_FS is not set
 # CONFIG_OCFS2_FS is not set
 # CONFIG_BTRFS_FS is not set
+# CONFIG_NILFS2_FS is not set
 CONFIG_FILE_LOCKING=y
 CONFIG_FSNOTIFY=y
 CONFIG_DNOTIFY=y
@@ -798,7 +808,6 @@ CONFIG_MISC_FILESYSTEMS=y
 # CONFIG_SYSV_FS is not set
 # CONFIG_UFS_FS is not set
 # CONFIG_EXOFS_FS is not set
-# CONFIG_NILFS2_FS is not set
 CONFIG_NETWORK_FILESYSTEMS=y
 CONFIG_NFS_FS=y
 CONFIG_NFS_V3=y
@@ -885,11 +894,13 @@ CONFIG_DEBUG_MEMORY_INIT=y
 # CONFIG_DEBUG_LIST is not set
 # CONFIG_DEBUG_SG is not set
 # CONFIG_DEBUG_NOTIFIERS is not set
+# CONFIG_DEBUG_CREDENTIALS is not set
 # CONFIG_RCU_TORTURE_TEST is not set
 # CONFIG_RCU_CPU_STALL_DETECTOR is not set
 # CONFIG_KPROBES_SANITY_TEST is not set
 # CONFIG_BACKTRACE_SELF_TEST is not set
 # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
+CONFIG_DEBUG_FORCE_WEAK_PER_CPU=y
 # CONFIG_LKDTM is not set
 # CONFIG_FAULT_INJECTION is not set
 # CONFIG_LATENCYTOP is not set
@@ -979,11 +990,13 @@ CONFIG_CRYPTO_PCBC=m
 #
 CONFIG_CRYPTO_HMAC=m
 # CONFIG_CRYPTO_XCBC is not set
+CONFIG_CRYPTO_VMAC=m
 
 #
 # Digest
 #
 CONFIG_CRYPTO_CRC32C=m
+CONFIG_CRYPTO_GHASH=m
 # CONFIG_CRYPTO_MD4 is not set
 CONFIG_CRYPTO_MD5=m
 # CONFIG_CRYPTO_MICHAEL_MIC is not set
-- 
cgit v1.2.2