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authorJiri Kosina <jkosina@suse.cz>2011-09-15 15:08:05 +0200
committerJiri Kosina <jkosina@suse.cz>2011-09-15 15:08:18 +0200
commite060c38434b2caa78efe7cedaff4191040b65a15 (patch)
tree407361230bf6733f63d8e788e4b5e6566ee04818 /arch/s390
parent10e4ac572eeffe5317019bd7330b6058a400dfc2 (diff)
parentcc39c6a9bbdebfcf1a7dee64d83bf302bc38d941 (diff)
downloadop-kernel-dev-e060c38434b2caa78efe7cedaff4191040b65a15.zip
op-kernel-dev-e060c38434b2caa78efe7cedaff4191040b65a15.tar.gz
Merge branch 'master' into for-next
Fast-forward merge with Linus to be able to merge patches based on more recent version of the tree.
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/Kconfig9
-rw-r--r--arch/s390/include/asm/atomic.h7
-rw-r--r--arch/s390/include/asm/bitops.h5
-rw-r--r--arch/s390/include/asm/ipl.h1
-rw-r--r--arch/s390/include/asm/lowcore.h11
-rw-r--r--arch/s390/include/asm/processor.h2
-rw-r--r--arch/s390/include/asm/ptrace.h1
-rw-r--r--arch/s390/include/asm/system.h1
-rw-r--r--arch/s390/kernel/asm-offsets.c10
-rw-r--r--arch/s390/kernel/base.S36
-rw-r--r--arch/s390/kernel/compat_signal.c43
-rw-r--r--arch/s390/kernel/compat_wrapper.S6
-rw-r--r--arch/s390/kernel/dis.c2
-rw-r--r--arch/s390/kernel/early.c14
-rw-r--r--arch/s390/kernel/entry.S28
-rw-r--r--arch/s390/kernel/entry64.S20
-rw-r--r--arch/s390/kernel/ipl.c50
-rw-r--r--arch/s390/kernel/reipl64.S80
-rw-r--r--arch/s390/kernel/setup.c25
-rw-r--r--arch/s390/kernel/signal.c61
-rw-r--r--arch/s390/kernel/smp.c24
-rw-r--r--arch/s390/kernel/syscalls.S2
-rw-r--r--arch/s390/kernel/traps.c2
-rw-r--r--arch/s390/mm/maccess.c16
-rw-r--r--arch/s390/mm/pgtable.c1
25 files changed, 313 insertions, 144 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index c03fef7..ed5cb5a 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -81,6 +81,7 @@ config S390
select INIT_ALL_POSSIBLE
select HAVE_IRQ_WORK
select HAVE_PERF_EVENTS
+ select ARCH_HAVE_NMI_SAFE_CMPXCHG
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_LZMA
@@ -273,11 +274,11 @@ config MARCH_Z10
on older machines.
config MARCH_Z196
- bool "IBM zEnterprise 196"
+ bool "IBM zEnterprise 114 and 196"
help
- Select this to enable optimizations for IBM zEnterprise 196
- (2817 series). The kernel will be slightly faster but will not work
- on older machines.
+ Select this to enable optimizations for IBM zEnterprise 114 and 196
+ (2818 and 2817 series). The kernel will be slightly faster but will
+ not work on older machines.
endchoice
diff --git a/arch/s390/include/asm/atomic.h b/arch/s390/include/asm/atomic.h
index d9db138..8517d2a 100644
--- a/arch/s390/include/asm/atomic.h
+++ b/arch/s390/include/asm/atomic.h
@@ -93,7 +93,7 @@ static inline int atomic_cmpxchg(atomic_t *v, int old, int new)
return old;
}
-static inline int atomic_add_unless(atomic_t *v, int a, int u)
+static inline int __atomic_add_unless(atomic_t *v, int a, int u)
{
int c, old;
c = atomic_read(v);
@@ -105,10 +105,9 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
break;
c = old;
}
- return c != u;
+ return c;
}
-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
#undef __CS_LOOP
@@ -332,6 +331,4 @@ static inline long long atomic64_dec_if_positive(atomic64_t *v)
#define smp_mb__before_atomic_inc() smp_mb()
#define smp_mb__after_atomic_inc() smp_mb()
-#include <asm-generic/atomic-long.h>
-
#endif /* __ARCH_S390_ATOMIC__ */
diff --git a/arch/s390/include/asm/bitops.h b/arch/s390/include/asm/bitops.h
index 667c6e9..e5beb49 100644
--- a/arch/s390/include/asm/bitops.h
+++ b/arch/s390/include/asm/bitops.h
@@ -832,10 +832,7 @@ static inline int find_next_bit_le(void *vaddr, unsigned long size,
#include <asm-generic/bitops/le.h>
-#define ext2_set_bit_atomic(lock, nr, addr) \
- test_and_set_bit_le(nr, addr)
-#define ext2_clear_bit_atomic(lock, nr, addr) \
- test_and_clear_bit_le(nr, addr)
+#include <asm-generic/bitops/ext2-atomic-setbit.h>
#endif /* __KERNEL__ */
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h
index 5e95d95..97cc440 100644
--- a/arch/s390/include/asm/ipl.h
+++ b/arch/s390/include/asm/ipl.h
@@ -167,5 +167,6 @@ enum diag308_rc {
};
extern int diag308(unsigned long subcode, void *addr);
+extern void diag308_reset(void);
#endif /* _ASM_S390_IPL_H */
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index f26280d..e85c911 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -18,6 +18,7 @@ void system_call(void);
void pgm_check_handler(void);
void mcck_int_handler(void);
void io_int_handler(void);
+void psw_restart_int_handler(void);
#ifdef CONFIG_32BIT
@@ -150,7 +151,10 @@ struct _lowcore {
*/
__u32 ipib; /* 0x0e00 */
__u32 ipib_checksum; /* 0x0e04 */
- __u8 pad_0x0e08[0x0f00-0x0e08]; /* 0x0e08 */
+
+ /* 64 bit save area */
+ __u64 save_area_64; /* 0x0e08 */
+ __u8 pad_0x0e10[0x0f00-0x0e10]; /* 0x0e10 */
/* Extended facility list */
__u64 stfle_fac_list[32]; /* 0x0f00 */
@@ -286,7 +290,10 @@ struct _lowcore {
*/
__u64 ipib; /* 0x0e00 */
__u32 ipib_checksum; /* 0x0e08 */
- __u8 pad_0x0e0c[0x0f00-0x0e0c]; /* 0x0e0c */
+
+ /* 64 bit save area */
+ __u64 save_area_64; /* 0x0e0c */
+ __u8 pad_0x0e14[0x0f00-0x0e14]; /* 0x0e14 */
/* Extended facility list */
__u64 stfle_fac_list[32]; /* 0x0f00 */
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 55dfcc8..a4b6229 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -119,14 +119,12 @@ struct stack_frame {
* Do necessary setup to start up a new thread.
*/
#define start_thread(regs, new_psw, new_stackp) do { \
- set_fs(USER_DS); \
regs->psw.mask = psw_user_bits; \
regs->psw.addr = new_psw | PSW_ADDR_AMODE; \
regs->gprs[15] = new_stackp; \
} while (0)
#define start_thread31(regs, new_psw, new_stackp) do { \
- set_fs(USER_DS); \
regs->psw.mask = psw_user32_bits; \
regs->psw.addr = new_psw | PSW_ADDR_AMODE; \
regs->gprs[15] = new_stackp; \
diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h
index 9ad628a..62fd80c 100644
--- a/arch/s390/include/asm/ptrace.h
+++ b/arch/s390/include/asm/ptrace.h
@@ -539,7 +539,6 @@ struct user_regs_struct
* These are defined as per linux/ptrace.h, which see.
*/
#define arch_has_single_step() (1)
-extern void show_regs(struct pt_regs * regs);
#define user_mode(regs) (((regs)->psw.mask & PSW_MASK_PSTATE) != 0)
#define instruction_pointer(regs) ((regs)->psw.addr & PSW_ADDR_INSN)
diff --git a/arch/s390/include/asm/system.h b/arch/s390/include/asm/system.h
index d382629..6582f69 100644
--- a/arch/s390/include/asm/system.h
+++ b/arch/s390/include/asm/system.h
@@ -113,6 +113,7 @@ extern void pfault_fini(void);
extern void cmma_init(void);
extern int memcpy_real(void *, void *, size_t);
+extern void copy_to_absolute_zero(void *dest, void *src, size_t count);
#define finish_arch_switch(prev) do { \
set_fs(current->thread.mm_segment); \
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 05d8f38..532fd43 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -27,12 +27,9 @@ int main(void)
BLANK();
DEFINE(__TASK_pid, offsetof(struct task_struct, pid));
BLANK();
- DEFINE(__THREAD_per_cause,
- offsetof(struct task_struct, thread.per_event.cause));
- DEFINE(__THREAD_per_address,
- offsetof(struct task_struct, thread.per_event.address));
- DEFINE(__THREAD_per_paid,
- offsetof(struct task_struct, thread.per_event.paid));
+ DEFINE(__THREAD_per_cause, offsetof(struct task_struct, thread.per_event.cause));
+ DEFINE(__THREAD_per_address, offsetof(struct task_struct, thread.per_event.address));
+ DEFINE(__THREAD_per_paid, offsetof(struct task_struct, thread.per_event.paid));
BLANK();
DEFINE(__TI_task, offsetof(struct thread_info, task));
DEFINE(__TI_domain, offsetof(struct thread_info, exec_domain));
@@ -142,6 +139,7 @@ int main(void)
DEFINE(__LC_FPREGS_SAVE_AREA, offsetof(struct _lowcore, floating_pt_save_area));
DEFINE(__LC_GPREGS_SAVE_AREA, offsetof(struct _lowcore, gpregs_save_area));
DEFINE(__LC_CREGS_SAVE_AREA, offsetof(struct _lowcore, cregs_save_area));
+ DEFINE(__LC_SAVE_AREA_64, offsetof(struct _lowcore, save_area_64));
#ifdef CONFIG_32BIT
DEFINE(SAVE_AREA_BASE, offsetof(struct _lowcore, extended_save_area_addr));
#else /* CONFIG_32BIT */
diff --git a/arch/s390/kernel/base.S b/arch/s390/kernel/base.S
index 209938c..2554356 100644
--- a/arch/s390/kernel/base.S
+++ b/arch/s390/kernel/base.S
@@ -76,6 +76,42 @@ s390_base_pgm_handler_fn:
.quad 0
.previous
+#
+# Calls diag 308 subcode 1 and continues execution
+#
+# The following conditions must be ensured before calling this function:
+# * Prefix register = 0
+# * Lowcore protection is disabled
+#
+ENTRY(diag308_reset)
+ larl %r4,.Lctlregs # Save control registers
+ stctg %c0,%c15,0(%r4)
+ larl %r4,.Lrestart_psw # Setup restart PSW at absolute 0
+ lghi %r3,0
+ lg %r4,0(%r4) # Save PSW
+ sturg %r4,%r3 # Use sturg, because of large pages
+ lghi %r1,1
+ diag %r1,%r1,0x308
+.Lrestart_part2:
+ lhi %r0,0 # Load r0 with zero
+ lhi %r1,2 # Use mode 2 = ESAME (dump)
+ sigp %r1,%r0,0x12 # Switch to ESAME mode
+ sam64 # Switch to 64 bit addressing mode
+ larl %r4,.Lctlregs # Restore control registers
+ lctlg %c0,%c15,0(%r4)
+ br %r14
+.align 16
+.Lrestart_psw:
+ .long 0x00080000,0x80000000 + .Lrestart_part2
+
+ .section .bss
+.align 8
+.Lctlregs:
+ .rept 16
+ .quad 0
+ .endr
+ .previous
+
#else /* CONFIG_64BIT */
ENTRY(s390_base_mcck_handler)
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index eee9998..a9a285b 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -380,20 +380,13 @@ asmlinkage long sys32_sigreturn(void)
goto badframe;
if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32))
goto badframe;
-
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
+ set_current_blocked(&set);
if (restore_sigregs32(regs, &frame->sregs))
goto badframe;
if (restore_sigregs_gprs_high(regs, frame->gprs_high))
goto badframe;
-
return regs->gprs[2];
-
badframe:
force_sig(SIGSEGV, current);
return 0;
@@ -413,31 +406,22 @@ asmlinkage long sys32_rt_sigreturn(void)
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
-
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
+ set_current_blocked(&set);
if (restore_sigregs32(regs, &frame->uc.uc_mcontext))
goto badframe;
if (restore_sigregs_gprs_high(regs, frame->gprs_high))
goto badframe;
-
err = __get_user(ss_sp, &frame->uc.uc_stack.ss_sp);
st.ss_sp = compat_ptr(ss_sp);
err |= __get_user(st.ss_size, &frame->uc.uc_stack.ss_size);
err |= __get_user(st.ss_flags, &frame->uc.uc_stack.ss_flags);
if (err)
goto badframe;
-
set_fs (KERNEL_DS);
do_sigaltstack((stack_t __force __user *)&st, NULL, regs->gprs[15]);
set_fs (old_fs);
-
return regs->gprs[2];
-
badframe:
force_sig(SIGSEGV, current);
return 0;
@@ -605,10 +589,10 @@ give_sigsegv:
* OK, we're invoking a handler
*/
-int
-handle_signal32(unsigned long sig, struct k_sigaction *ka,
- siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
+int handle_signal32(unsigned long sig, struct k_sigaction *ka,
+ siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
{
+ sigset_t blocked;
int ret;
/* Set up the stack frame */
@@ -616,15 +600,12 @@ handle_signal32(unsigned long sig, struct k_sigaction *ka,
ret = setup_rt_frame32(sig, ka, info, oldset, regs);
else
ret = setup_frame32(sig, ka, oldset, regs);
-
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
- return ret;
+ if (ret)
+ return ret;
+ sigorsets(&blocked, &current->blocked, &ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
+ sigaddset(&blocked, sig);
+ set_current_blocked(&blocked);
+ return 0;
}
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 08ab9aa..7526db6 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -665,12 +665,6 @@ ENTRY(sys32_poll_wrapper)
lgfr %r4,%r4 # long
jg sys_poll # branch to system call
-ENTRY(compat_sys_nfsservctl_wrapper)
- lgfr %r2,%r2 # int
- llgtr %r3,%r3 # struct compat_nfsctl_arg*
- llgtr %r4,%r4 # union compat_nfsctl_res*
- jg compat_sys_nfsservctl # branch to system call
-
ENTRY(sys32_setresgid16_wrapper)
llgfr %r2,%r2 # __kernel_old_gid_emu31_t
llgfr %r3,%r3 # __kernel_old_gid_emu31_t
diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index 1ca3d1d..45df6d4 100644
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -27,7 +27,7 @@
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/io.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
#include <asm/mathemu.h>
#include <asm/cpcmd.h>
#include <asm/lowcore.h>
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 068f846..f297456 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -396,17 +396,19 @@ static __init void detect_machine_facilities(void)
static __init void rescue_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
+ unsigned long min_initrd_addr = (unsigned long) _end + (4UL << 20);
/*
- * Move the initrd right behind the bss section in case it starts
- * within the bss section. So we don't overwrite it when the bss
- * section gets cleared.
+ * Just like in case of IPL from VM reader we make sure there is a
+ * gap of 4MB between end of kernel and start of initrd.
+ * That way we can also be sure that saving an NSS will succeed,
+ * which however only requires different segments.
*/
if (!INITRD_START || !INITRD_SIZE)
return;
- if (INITRD_START >= (unsigned long) __bss_stop)
+ if (INITRD_START >= min_initrd_addr)
return;
- memmove(__bss_stop, (void *) INITRD_START, INITRD_SIZE);
- INITRD_START = (unsigned long) __bss_stop;
+ memmove((void *) min_initrd_addr, (void *) INITRD_START, INITRD_SIZE);
+ INITRD_START = min_initrd_addr;
#endif
}
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 3eab7cf..02ec8fe 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -849,6 +849,34 @@ restart_crash:
restart_go:
#endif
+#
+# PSW restart interrupt handler
+#
+ENTRY(psw_restart_int_handler)
+ st %r15,__LC_SAVE_AREA_64(%r0) # save r15
+ basr %r15,0
+0: l %r15,.Lrestart_stack-0b(%r15) # load restart stack
+ l %r15,0(%r15)
+ ahi %r15,-SP_SIZE # make room for pt_regs
+ stm %r0,%r14,SP_R0(%r15) # store gprs %r0-%r14 to stack
+ mvc SP_R15(4,%r15),__LC_SAVE_AREA_64(%r0)# store saved %r15 to stack
+ mvc SP_PSW(8,%r15),__LC_RST_OLD_PSW(%r0) # store restart old psw
+ xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # set backchain to 0
+ basr %r14,0
+1: l %r14,.Ldo_restart-1b(%r14)
+ basr %r14,%r14
+
+ basr %r14,0 # load disabled wait PSW if
+2: lpsw restart_psw_crash-2b(%r14) # do_restart returns
+ .align 4
+.Ldo_restart:
+ .long do_restart
+.Lrestart_stack:
+ .long restart_stack
+ .align 8
+restart_psw_crash:
+ .long 0x000a0000,0x00000000 + restart_psw_crash
+
.section .kprobes.text, "ax"
#ifdef CONFIG_CHECK_STACK
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 7a0fd42..5f729d6 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -865,6 +865,26 @@ restart_crash:
restart_go:
#endif
+#
+# PSW restart interrupt handler
+#
+ENTRY(psw_restart_int_handler)
+ stg %r15,__LC_SAVE_AREA_64(%r0) # save r15
+ larl %r15,restart_stack # load restart stack
+ lg %r15,0(%r15)
+ aghi %r15,-SP_SIZE # make room for pt_regs
+ stmg %r0,%r14,SP_R0(%r15) # store gprs %r0-%r14 to stack
+ mvc SP_R15(8,%r15),__LC_SAVE_AREA_64(%r0)# store saved %r15 to stack
+ mvc SP_PSW(16,%r15),__LC_RST_OLD_PSW(%r0)# store restart old psw
+ xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # set backchain to 0
+ brasl %r14,do_restart
+
+ larl %r14,restart_psw_crash # load disabled wait PSW if
+ lpswe 0(%r14) # do_restart returns
+ .align 8
+restart_psw_crash:
+ .quad 0x0002000080000000,0x0000000000000000 + restart_psw_crash
+
.section .kprobes.text, "ax"
#ifdef CONFIG_CHECK_STACK
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index a689070..48c7102 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -45,11 +45,13 @@
* - halt
* - power off
* - reipl
+ * - restart
*/
#define ON_PANIC_STR "on_panic"
#define ON_HALT_STR "on_halt"
#define ON_POFF_STR "on_poff"
#define ON_REIPL_STR "on_reboot"
+#define ON_RESTART_STR "on_restart"
struct shutdown_action;
struct shutdown_trigger {
@@ -1218,7 +1220,7 @@ static int __init reipl_fcp_init(void)
/* sysfs: create fcp kset for mixing attr group and bin attrs */
reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
&reipl_kset->kobj);
- if (!reipl_kset) {
+ if (!reipl_fcp_kset) {
free_page((unsigned long) reipl_block_fcp);
return -ENOMEM;
}
@@ -1544,17 +1546,20 @@ static char vmcmd_on_reboot[128];
static char vmcmd_on_panic[128];
static char vmcmd_on_halt[128];
static char vmcmd_on_poff[128];
+static char vmcmd_on_restart[128];
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
+DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
static struct attribute *vmcmd_attrs[] = {
&sys_vmcmd_on_reboot_attr.attr,
&sys_vmcmd_on_panic_attr.attr,
&sys_vmcmd_on_halt_attr.attr,
&sys_vmcmd_on_poff_attr.attr,
+ &sys_vmcmd_on_restart_attr.attr,
NULL,
};
@@ -1576,6 +1581,8 @@ static void vmcmd_run(struct shutdown_trigger *trigger)
cmd = vmcmd_on_halt;
else if (strcmp(trigger->name, ON_POFF_STR) == 0)
cmd = vmcmd_on_poff;
+ else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
+ cmd = vmcmd_on_restart;
else
return;
@@ -1611,7 +1618,8 @@ static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
static void stop_run(struct shutdown_trigger *trigger)
{
- if (strcmp(trigger->name, ON_PANIC_STR) == 0)
+ if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
+ strcmp(trigger->name, ON_RESTART_STR) == 0)
disabled_wait((unsigned long) __builtin_return_address(0));
while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
cpu_relax();
@@ -1707,6 +1715,34 @@ static void do_panic(void)
stop_run(&on_panic_trigger);
}
+/* on restart */
+
+static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
+ &stop_action};
+
+static ssize_t on_restart_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return sprintf(page, "%s\n", on_restart_trigger.action->name);
+}
+
+static ssize_t on_restart_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t len)
+{
+ return set_trigger(buf, &on_restart_trigger, len);
+}
+
+static struct kobj_attribute on_restart_attr =
+ __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
+
+void do_restart(void)
+{
+ smp_send_stop();
+ on_restart_trigger.action->fn(&on_restart_trigger);
+ stop_run(&on_restart_trigger);
+}
+
/* on halt */
static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
@@ -1783,7 +1819,9 @@ static void __init shutdown_triggers_init(void)
if (sysfs_create_file(&shutdown_actions_kset->kobj,
&on_poff_attr.attr))
goto fail;
-
+ if (sysfs_create_file(&shutdown_actions_kset->kobj,
+ &on_restart_attr.attr))
+ goto fail;
return;
fail:
panic("shutdown_triggers_init failed\n");
@@ -1959,6 +1997,12 @@ static void do_reset_calls(void)
{
struct reset_call *reset;
+#ifdef CONFIG_64BIT
+ if (diag308_set_works) {
+ diag308_reset();
+ return;
+ }
+#endif
list_for_each_entry(reset, &rcall, list)
reset->fn();
}
diff --git a/arch/s390/kernel/reipl64.S b/arch/s390/kernel/reipl64.S
index 78eb7cf..e690975 100644
--- a/arch/s390/kernel/reipl64.S
+++ b/arch/s390/kernel/reipl64.S
@@ -1,5 +1,5 @@
/*
- * Copyright IBM Corp 2000,2009
+ * Copyright IBM Corp 2000,2011
* Author(s): Holger Smolinski <Holger.Smolinski@de.ibm.com>,
* Denis Joseph Barrow,
*/
@@ -8,6 +8,64 @@
#include <asm/asm-offsets.h>
#
+# store_status
+#
+# Prerequisites to run this function:
+# - Prefix register is set to zero
+# - Original prefix register is stored in "dump_prefix_page"
+# - Lowcore protection is off
+#
+ENTRY(store_status)
+ /* Save register one and load save area base */
+ stg %r1,__LC_SAVE_AREA_64(%r0)
+ lghi %r1,SAVE_AREA_BASE
+ /* General purpose registers */
+ stmg %r0,%r15,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ lg %r2,__LC_SAVE_AREA_64(%r0)
+ stg %r2,__LC_GPREGS_SAVE_AREA-SAVE_AREA_BASE+8(%r1)
+ /* Control registers */
+ stctg %c0,%c15,__LC_CREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ /* Access registers */
+ stam %a0,%a15,__LC_AREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ /* Floating point registers */
+ std %f0, 0x00 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f1, 0x08 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f2, 0x10 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f3, 0x18 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f4, 0x20 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f5, 0x28 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f6, 0x30 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f7, 0x38 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f8, 0x40 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f9, 0x48 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f10,0x50 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f11,0x58 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f12,0x60 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f13,0x68 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f14,0x70 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ std %f15,0x78 + __LC_FPREGS_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ /* Floating point control register */
+ stfpc __LC_FP_CREG_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ /* CPU timer */
+ stpt __LC_CPU_TIMER_SAVE_AREA-SAVE_AREA_BASE(%r1)
+ /* Saved prefix register */
+ larl %r2,dump_prefix_page
+ mvc __LC_PREFIX_SAVE_AREA-SAVE_AREA_BASE(4,%r1),0(%r2)
+ /* Clock comparator - seven bytes */
+ larl %r2,.Lclkcmp
+ stckc 0(%r2)
+ mvc __LC_CLOCK_COMP_SAVE_AREA-SAVE_AREA_BASE + 1(7,%r1),1(%r2)
+ /* Program status word */
+ epsw %r2,%r3
+ st %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 0(%r1)
+ st %r3,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 4(%r1)
+ larl %r2,store_status
+ stg %r2,__LC_PSW_SAVE_AREA-SAVE_AREA_BASE + 8(%r1)
+ br %r14
+.align 8
+.Lclkcmp: .quad 0x0000000000000000
+
+#
# do_reipl_asm
# Parameter: r2 = schid of reipl device
#
@@ -15,22 +73,7 @@
ENTRY(do_reipl_asm)
basr %r13,0
.Lpg0: lpswe .Lnewpsw-.Lpg0(%r13)
-.Lpg1: # do store status of all registers
-
- stg %r1,.Lregsave-.Lpg0(%r13)
- lghi %r1,0x1000
- stmg %r0,%r15,__LC_GPREGS_SAVE_AREA-0x1000(%r1)
- lg %r0,.Lregsave-.Lpg0(%r13)
- stg %r0,__LC_GPREGS_SAVE_AREA-0x1000+8(%r1)
- stctg %c0,%c15,__LC_CREGS_SAVE_AREA-0x1000(%r1)
- stam %a0,%a15,__LC_AREGS_SAVE_AREA-0x1000(%r1)
- lg %r10,.Ldump_pfx-.Lpg0(%r13)
- mvc __LC_PREFIX_SAVE_AREA-0x1000(4,%r1),0(%r10)
- stfpc __LC_FP_CREG_SAVE_AREA-0x1000(%r1)
- stckc .Lclkcmp-.Lpg0(%r13)
- mvc __LC_CLOCK_COMP_SAVE_AREA-0x1000(7,%r1),.Lclkcmp-.Lpg0(%r13)
- stpt __LC_CPU_TIMER_SAVE_AREA-0x1000(%r1)
- stg %r13, __LC_PSW_SAVE_AREA-0x1000+8(%r1)
+.Lpg1: brasl %r14,store_status
lctlg %c6,%c6,.Lall-.Lpg0(%r13)
lgr %r1,%r2
@@ -67,10 +110,7 @@ ENTRY(do_reipl_asm)
st %r14,.Ldispsw+12-.Lpg0(%r13)
lpswe .Ldispsw-.Lpg0(%r13)
.align 8
-.Lclkcmp: .quad 0x0000000000000000
.Lall: .quad 0x00000000ff000000
-.Ldump_pfx: .quad dump_prefix_page
-.Lregsave: .quad 0x0000000000000000
.align 16
/*
* These addresses have to be 31 bit otherwise
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 0c35dee1..7b371c3 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -346,7 +346,7 @@ setup_lowcore(void)
lc = __alloc_bootmem_low(LC_PAGES * PAGE_SIZE, LC_PAGES * PAGE_SIZE, 0);
lc->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
lc->restart_psw.addr =
- PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
+ PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
if (user_mode != HOME_SPACE_MODE)
lc->restart_psw.mask |= PSW_ASC_HOME;
lc->external_new_psw.mask = psw_kernel_bits;
@@ -529,6 +529,27 @@ static void __init setup_memory_end(void)
memory_end = memory_size;
}
+void *restart_stack __attribute__((__section__(".data")));
+
+/*
+ * Setup new PSW and allocate stack for PSW restart interrupt
+ */
+static void __init setup_restart_psw(void)
+{
+ psw_t psw;
+
+ restart_stack = __alloc_bootmem(ASYNC_SIZE, ASYNC_SIZE, 0);
+ restart_stack += ASYNC_SIZE;
+
+ /*
+ * Setup restart PSW for absolute zero lowcore. This is necesary
+ * if PSW restart is done on an offline CPU that has lowcore zero
+ */
+ psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
+ psw.addr = PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
+ copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw));
+}
+
static void __init
setup_memory(void)
{
@@ -731,6 +752,7 @@ static void __init setup_hwcaps(void)
strcpy(elf_platform, "z10");
break;
case 0x2817:
+ case 0x2818:
strcpy(elf_platform, "z196");
break;
}
@@ -792,6 +814,7 @@ setup_arch(char **cmdline_p)
setup_addressing_mode();
setup_memory();
setup_resources();
+ setup_restart_psw();
setup_lowcore();
cpu_init();
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index abbb3c3..9a40e1c 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -57,17 +57,15 @@ typedef struct
*/
SYSCALL_DEFINE3(sigsuspend, int, history0, int, history1, old_sigset_t, mask)
{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ sigset_t blocked;
+ current->saved_sigmask = current->blocked;
+ mask &= _BLOCKABLE;
+ siginitset(&blocked, mask);
+ set_current_blocked(&blocked);
set_current_state(TASK_INTERRUPTIBLE);
schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
-
+ set_restore_sigmask();
return -ERESTARTNOHAND;
}
@@ -172,18 +170,11 @@ SYSCALL_DEFINE0(sigreturn)
goto badframe;
if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE))
goto badframe;
-
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
+ set_current_blocked(&set);
if (restore_sigregs(regs, &frame->sregs))
goto badframe;
-
return regs->gprs[2];
-
badframe:
force_sig(SIGSEGV, current);
return 0;
@@ -199,21 +190,14 @@ SYSCALL_DEFINE0(rt_sigreturn)
goto badframe;
if (__copy_from_user(&set.sig, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
-
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
+ set_current_blocked(&set);
if (restore_sigregs(regs, &frame->uc.uc_mcontext))
goto badframe;
-
if (do_sigaltstack(&frame->uc.uc_stack, NULL,
regs->gprs[15]) == -EFAULT)
goto badframe;
return regs->gprs[2];
-
badframe:
force_sig(SIGSEGV, current);
return 0;
@@ -385,14 +369,11 @@ give_sigsegv:
return -EFAULT;
}
-/*
- * OK, we're invoking a handler
- */
-
-static int
-handle_signal(unsigned long sig, struct k_sigaction *ka,
- siginfo_t *info, sigset_t *oldset, struct pt_regs * regs)
+static int handle_signal(unsigned long sig, struct k_sigaction *ka,
+ siginfo_t *info, sigset_t *oldset,
+ struct pt_regs *regs)
{
+ sigset_t blocked;
int ret;
/* Set up the stack frame */
@@ -400,17 +381,13 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
ret = setup_rt_frame(sig, ka, info, oldset, regs);
else
ret = setup_frame(sig, ka, oldset, regs);
-
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
-
- return ret;
+ if (ret)
+ return ret;
+ sigorsets(&blocked, &current->blocked, &ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
+ sigaddset(&blocked, sig);
+ set_current_blocked(&blocked);
+ return 0;
}
/*
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index a6d85c0..6ab16ac 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -452,23 +452,27 @@ out:
*/
int __cpuinit start_secondary(void *cpuvoid)
{
- /* Setup the cpu */
cpu_init();
preempt_disable();
- /* Enable TOD clock interrupts on the secondary cpu. */
init_cpu_timer();
- /* Enable cpu timer interrupts on the secondary cpu. */
init_cpu_vtimer();
- /* Enable pfault pseudo page faults on this cpu. */
pfault_init();
- /* call cpu notifiers */
notify_cpu_starting(smp_processor_id());
- /* Mark this cpu as online */
ipi_call_lock();
set_cpu_online(smp_processor_id(), true);
ipi_call_unlock();
- /* Switch on interrupts */
+ __ctl_clear_bit(0, 28); /* Disable lowcore protection */
+ S390_lowcore.restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
+ S390_lowcore.restart_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) psw_restart_int_handler;
+ __ctl_set_bit(0, 28); /* Enable lowcore protection */
+ /*
+ * Wait until the cpu which brought this one up marked it
+ * active before enabling interrupts.
+ */
+ while (!cpumask_test_cpu(smp_processor_id(), cpu_active_mask))
+ cpu_relax();
local_irq_enable();
/* cpu_idle will call schedule for us */
cpu_idle();
@@ -507,7 +511,11 @@ static int __cpuinit smp_alloc_lowcore(int cpu)
memset((char *)lowcore + 512, 0, sizeof(*lowcore) - 512);
lowcore->async_stack = async_stack + ASYNC_SIZE;
lowcore->panic_stack = panic_stack + PAGE_SIZE;
-
+ lowcore->restart_psw.mask = PSW_BASE_BITS | PSW_DEFAULT_KEY;
+ lowcore->restart_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) restart_int_handler;
+ if (user_mode != HOME_SPACE_MODE)
+ lowcore->restart_psw.mask |= PSW_ASC_HOME;
#ifndef CONFIG_64BIT
if (MACHINE_HAS_IEEE) {
unsigned long save_area;
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 6ee39ef..73eb08c 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -177,7 +177,7 @@ SYSCALL(sys_getresuid16,sys_ni_syscall,sys32_getresuid16_wrapper) /* 165 old get
NI_SYSCALL /* for vm86 */
NI_SYSCALL /* old sys_query_module */
SYSCALL(sys_poll,sys_poll,sys32_poll_wrapper)
-SYSCALL(sys_nfsservctl,sys_nfsservctl,compat_sys_nfsservctl_wrapper)
+NI_SYSCALL /* old nfsservctl */
SYSCALL(sys_setresgid16,sys_ni_syscall,sys32_setresgid16_wrapper) /* 170 old setresgid16 syscall */
SYSCALL(sys_getresgid16,sys_ni_syscall,sys32_getresgid16_wrapper) /* old getresgid16 syscall */
SYSCALL(sys_prctl,sys_prctl,sys32_prctl_wrapper)
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index e9372c7..ffabcd9 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -36,7 +36,7 @@
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/io.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
#include <asm/mathemu.h>
#include <asm/cpcmd.h>
#include <asm/lowcore.h>
diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c
index 51e5cd9..5dbbaa6 100644
--- a/arch/s390/mm/maccess.c
+++ b/arch/s390/mm/maccess.c
@@ -85,3 +85,19 @@ int memcpy_real(void *dest, void *src, size_t count)
arch_local_irq_restore(flags);
return rc;
}
+
+/*
+ * Copy memory to absolute zero
+ */
+void copy_to_absolute_zero(void *dest, void *src, size_t count)
+{
+ unsigned long cr0;
+
+ BUG_ON((unsigned long) dest + count >= sizeof(struct _lowcore));
+ preempt_disable();
+ __ctl_store(cr0, 0, 0);
+ __ctl_clear_bit(0, 28); /* disable lowcore protection */
+ memcpy_real(dest + store_prefix(), src, count);
+ __ctl_load(cr0, 0, 0);
+ preempt_enable();
+}
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index 2adb239..4d1f2bc 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -528,6 +528,7 @@ static inline void page_table_free_pgste(unsigned long *table)
static inline unsigned long *page_table_alloc_pgste(struct mm_struct *mm,
unsigned long vmaddr)
{
+ return NULL;
}
static inline void page_table_free_pgste(unsigned long *table)
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