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-rw-r--r--arch/s390/Kconfig23
-rw-r--r--arch/s390/include/asm/compat.h19
-rw-r--r--arch/s390/include/asm/cpu.h32
-rw-r--r--arch/s390/include/asm/cputime.h19
-rw-r--r--arch/s390/include/asm/ftrace.h21
-rw-r--r--arch/s390/include/asm/lowcore.h9
-rw-r--r--arch/s390/include/asm/pgtable.h7
-rw-r--r--arch/s390/include/asm/seccomp.h16
-rw-r--r--arch/s390/include/asm/spinlock.h19
-rw-r--r--arch/s390/include/asm/syscall.h1
-rw-r--r--arch/s390/include/asm/thread_info.h12
-rw-r--r--arch/s390/include/asm/uaccess.h16
-rw-r--r--arch/s390/include/asm/unistd.h4
-rw-r--r--arch/s390/kernel/Makefile7
-rw-r--r--arch/s390/kernel/compat_wrapper.S17
-rw-r--r--arch/s390/kernel/early.c4
-rw-r--r--arch/s390/kernel/entry.S7
-rw-r--r--arch/s390/kernel/entry64.S7
-rw-r--r--arch/s390/kernel/ftrace.c260
-rw-r--r--arch/s390/kernel/head.S65
-rw-r--r--arch/s390/kernel/kprobes.c31
-rw-r--r--arch/s390/kernel/mcount.S212
-rw-r--r--arch/s390/kernel/nmi.c2
-rw-r--r--arch/s390/kernel/process.c3
-rw-r--r--arch/s390/kernel/ptrace.c23
-rw-r--r--arch/s390/kernel/s390_ext.c5
-rw-r--r--arch/s390/kernel/sclp.S327
-rw-r--r--arch/s390/kernel/setup.c2
-rw-r--r--arch/s390/kernel/signal.c3
-rw-r--r--arch/s390/kernel/smp.c3
-rw-r--r--arch/s390/kernel/syscalls.S2
-rw-r--r--arch/s390/kernel/time.c9
-rw-r--r--arch/s390/kernel/vdso.c19
-rw-r--r--arch/s390/kernel/vmlinux.lds.S1
-rw-r--r--arch/s390/kernel/vtime.c2
-rw-r--r--arch/s390/kvm/kvm-s390.c2
-rw-r--r--arch/s390/lib/spinlock.c40
-rw-r--r--arch/s390/mm/Makefile2
-rw-r--r--arch/s390/mm/fault.c3
-rw-r--r--arch/s390/mm/maccess.c61
-rw-r--r--arch/s390/mm/mmap.c11
-rw-r--r--arch/s390/mm/pgtable.c16
42 files changed, 1173 insertions, 171 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 2eca5fe0e75..99dc3ded6b4 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -82,6 +82,11 @@ config S390
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_SYSCALL_WRAPPERS
select HAVE_FUNCTION_TRACER
+ select HAVE_FUNCTION_TRACE_MCOUNT_TEST
+ select HAVE_FTRACE_MCOUNT_RECORD
+ select HAVE_FTRACE_SYSCALLS
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_DEFAULT_NO_SPIN_MUTEXES
select HAVE_OPROFILE
select HAVE_KPROBES
@@ -567,6 +572,24 @@ bool "s390 guest support for KVM (EXPERIMENTAL)"
the KVM hypervisor. This will add detection for KVM as well as a
virtio transport. If KVM is detected, the virtio console will be
the default console.
+
+config SECCOMP
+ bool "Enable seccomp to safely compute untrusted bytecode"
+ depends on PROC_FS
+ default y
+ help
+ This kernel feature is useful for number crunching applications
+ that may need to compute untrusted bytecode during their
+ execution. By using pipes or other transports made available to
+ the process as file descriptors supporting the read/write
+ syscalls, it's possible to isolate those applications in
+ their own address space using seccomp. Once seccomp is
+ enabled via /proc/<pid>/seccomp, it cannot be disabled
+ and the task is only allowed to execute a few safe syscalls
+ defined by each seccomp mode.
+
+ If unsure, say Y.
+
endmenu
source "net/Kconfig"
diff --git a/arch/s390/include/asm/compat.h b/arch/s390/include/asm/compat.h
index de065b32381..01a08020bc0 100644
--- a/arch/s390/include/asm/compat.h
+++ b/arch/s390/include/asm/compat.h
@@ -5,6 +5,7 @@
*/
#include <linux/types.h>
#include <linux/sched.h>
+#include <linux/thread_info.h>
#define PSW32_MASK_PER 0x40000000UL
#define PSW32_MASK_DAT 0x04000000UL
@@ -163,12 +164,28 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr)
return (u32)(unsigned long)uptr;
}
+#ifdef CONFIG_COMPAT
+
+static inline int is_compat_task(void)
+{
+ return test_thread_flag(TIF_31BIT);
+}
+
+#else
+
+static inline int is_compat_task(void)
+{
+ return 0;
+}
+
+#endif
+
static inline void __user *compat_alloc_user_space(long len)
{
unsigned long stack;
stack = KSTK_ESP(current);
- if (test_thread_flag(TIF_31BIT))
+ if (is_compat_task())
stack &= 0x7fffffffUL;
return (void __user *) (stack - len);
}
diff --git a/arch/s390/include/asm/cpu.h b/arch/s390/include/asm/cpu.h
deleted file mode 100644
index d60a2eefb17..00000000000
--- a/arch/s390/include/asm/cpu.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * include/asm-s390/cpu.h
- *
- * Copyright IBM Corp. 2007
- * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
- */
-
-#ifndef _ASM_S390_CPU_H_
-#define _ASM_S390_CPU_H_
-
-#include <linux/types.h>
-#include <linux/percpu.h>
-#include <linux/spinlock.h>
-
-struct s390_idle_data {
- spinlock_t lock;
- unsigned long long idle_count;
- unsigned long long idle_enter;
- unsigned long long idle_time;
-};
-
-DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
-
-void vtime_start_cpu(void);
-
-static inline void s390_idle_check(void)
-{
- if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
- vtime_start_cpu();
-}
-
-#endif /* _ASM_S390_CPU_H_ */
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index 941384fbd39..ec917d42ee6 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -9,6 +9,9 @@
#ifndef _S390_CPUTIME_H
#define _S390_CPUTIME_H
+#include <linux/types.h>
+#include <linux/percpu.h>
+#include <linux/spinlock.h>
#include <asm/div64.h>
/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
@@ -174,8 +177,24 @@ cputime64_to_clock_t(cputime64_t cputime)
return __div(cputime, 4096000000ULL / USER_HZ);
}
+struct s390_idle_data {
+ spinlock_t lock;
+ unsigned long long idle_count;
+ unsigned long long idle_enter;
+ unsigned long long idle_time;
+};
+
+DECLARE_PER_CPU(struct s390_idle_data, s390_idle);
+
+void vtime_start_cpu(void);
cputime64_t s390_get_idle_time(int cpu);
#define arch_idle_time(cpu) s390_get_idle_time(cpu)
+static inline void s390_idle_check(void)
+{
+ if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
+ vtime_start_cpu();
+}
+
#endif /* _S390_CPUTIME_H */
diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h
index 5a5bc75e19d..96c14a9102b 100644
--- a/arch/s390/include/asm/ftrace.h
+++ b/arch/s390/include/asm/ftrace.h
@@ -2,7 +2,28 @@
#define _ASM_S390_FTRACE_H
#ifndef __ASSEMBLY__
+
extern void _mcount(void);
+extern unsigned long ftrace_dyn_func;
+
+struct dyn_arch_ftrace { };
+
+#define MCOUNT_ADDR ((long)_mcount)
+
+#ifdef CONFIG_64BIT
+#define MCOUNT_OFFSET_RET 18
+#define MCOUNT_INSN_SIZE 24
+#define MCOUNT_OFFSET 14
+#else
+#define MCOUNT_OFFSET_RET 26
+#define MCOUNT_INSN_SIZE 30
+#define MCOUNT_OFFSET 8
#endif
+static inline unsigned long ftrace_call_adjust(unsigned long addr)
+{
+ return addr - MCOUNT_OFFSET;
+}
+
+#endif /* __ASSEMBLY__ */
#endif /* _ASM_S390_FTRACE_H */
diff --git a/arch/s390/include/asm/lowcore.h b/arch/s390/include/asm/lowcore.h
index 3aeca492b14..5046ad6b7a6 100644
--- a/arch/s390/include/asm/lowcore.h
+++ b/arch/s390/include/asm/lowcore.h
@@ -30,6 +30,7 @@
#define __LC_SUBCHANNEL_NR 0x00ba
#define __LC_IO_INT_PARM 0x00bc
#define __LC_IO_INT_WORD 0x00c0
+#define __LC_STFL_FAC_LIST 0x00c8
#define __LC_MCCK_CODE 0x00e8
#define __LC_DUMP_REIPL 0x0e00
@@ -67,6 +68,7 @@
#define __LC_CPUID 0x02b0
#define __LC_INT_CLOCK 0x02c8
#define __LC_MACHINE_FLAGS 0x02d8
+#define __LC_FTRACE_FUNC 0x02dc
#define __LC_IRB 0x0300
#define __LC_PFAULT_INTPARM 0x0080
#define __LC_CPU_TIMER_SAVE_AREA 0x00d8
@@ -112,6 +114,7 @@
#define __LC_INT_CLOCK 0x0340
#define __LC_VDSO_PER_CPU 0x0350
#define __LC_MACHINE_FLAGS 0x0358
+#define __LC_FTRACE_FUNC 0x0360
#define __LC_IRB 0x0380
#define __LC_PASTE 0x03c0
#define __LC_PFAULT_INTPARM 0x11b8
@@ -280,7 +283,8 @@ struct _lowcore
__u64 int_clock; /* 0x02c8 */
__u64 clock_comparator; /* 0x02d0 */
__u32 machine_flags; /* 0x02d8 */
- __u8 pad_0x02dc[0x0300-0x02dc]; /* 0x02dc */
+ __u32 ftrace_func; /* 0x02dc */
+ __u8 pad_0x02f0[0x0300-0x02f0]; /* 0x02f0 */
/* Interrupt response block */
__u8 irb[64]; /* 0x0300 */
@@ -385,7 +389,8 @@ struct _lowcore
__u64 clock_comparator; /* 0x0348 */
__u64 vdso_per_cpu_data; /* 0x0350 */
__u64 machine_flags; /* 0x0358 */
- __u8 pad_0x0360[0x0380-0x0360]; /* 0x0360 */
+ __u64 ftrace_func; /* 0x0360 */
+ __u8 pad_0x0368[0x0380-0x0368]; /* 0x0368 */
/* Interrupt response block. */
__u8 irb[64]; /* 0x0380 */
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 5caddd4f7be..60a7b1a1702 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -112,12 +112,15 @@ extern char empty_zero_page[PAGE_SIZE];
* effect, this also makes sure that 64 bit module code cannot be used
* as system call address.
*/
+
+extern unsigned long VMALLOC_START;
+
#ifndef __s390x__
-#define VMALLOC_START 0x78000000UL
+#define VMALLOC_SIZE (96UL << 20)
#define VMALLOC_END 0x7e000000UL
#define VMEM_MAP_END 0x80000000UL
#else /* __s390x__ */
-#define VMALLOC_START 0x3e000000000UL
+#define VMALLOC_SIZE (1UL << 30)
#define VMALLOC_END 0x3e040000000UL
#define VMEM_MAP_END 0x40000000000UL
#endif /* __s390x__ */
diff --git a/arch/s390/include/asm/seccomp.h b/arch/s390/include/asm/seccomp.h
new file mode 100644
index 00000000000..781a9cf9b00
--- /dev/null
+++ b/arch/s390/include/asm/seccomp.h
@@ -0,0 +1,16 @@
+#ifndef _ASM_S390_SECCOMP_H
+#define _ASM_S390_SECCOMP_H
+
+#include <linux/unistd.h>
+
+#define __NR_seccomp_read __NR_read
+#define __NR_seccomp_write __NR_write
+#define __NR_seccomp_exit __NR_exit
+#define __NR_seccomp_sigreturn __NR_sigreturn
+
+#define __NR_seccomp_read_32 __NR_read
+#define __NR_seccomp_write_32 __NR_write
+#define __NR_seccomp_exit_32 __NR_exit
+#define __NR_seccomp_sigreturn_32 __NR_sigreturn
+
+#endif /* _ASM_S390_SECCOMP_H */
diff --git a/arch/s390/include/asm/spinlock.h b/arch/s390/include/asm/spinlock.h
index f3861b09ebb..c9af0d19c7a 100644
--- a/arch/s390/include/asm/spinlock.h
+++ b/arch/s390/include/asm/spinlock.h
@@ -122,8 +122,10 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lp)
#define __raw_write_can_lock(x) ((x)->lock == 0)
extern void _raw_read_lock_wait(raw_rwlock_t *lp);
+extern void _raw_read_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
extern int _raw_read_trylock_retry(raw_rwlock_t *lp);
extern void _raw_write_lock_wait(raw_rwlock_t *lp);
+extern void _raw_write_lock_wait_flags(raw_rwlock_t *lp, unsigned long flags);
extern int _raw_write_trylock_retry(raw_rwlock_t *lp);
static inline void __raw_read_lock(raw_rwlock_t *rw)
@@ -134,6 +136,14 @@ static inline void __raw_read_lock(raw_rwlock_t *rw)
_raw_read_lock_wait(rw);
}
+static inline void __raw_read_lock_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+ unsigned int old;
+ old = rw->lock & 0x7fffffffU;
+ if (_raw_compare_and_swap(&rw->lock, old, old + 1) != old)
+ _raw_read_lock_wait_flags(rw, flags);
+}
+
static inline void __raw_read_unlock(raw_rwlock_t *rw)
{
unsigned int old, cmp;
@@ -151,6 +161,12 @@ static inline void __raw_write_lock(raw_rwlock_t *rw)
_raw_write_lock_wait(rw);
}
+static inline void __raw_write_lock_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+ if (unlikely(_raw_compare_and_swap(&rw->lock, 0, 0x80000000) != 0))
+ _raw_write_lock_wait_flags(rw, flags);
+}
+
static inline void __raw_write_unlock(raw_rwlock_t *rw)
{
_raw_compare_and_swap(&rw->lock, 0x80000000, 0);
@@ -172,9 +188,6 @@ static inline int __raw_write_trylock(raw_rwlock_t *rw)
return _raw_write_trylock_retry(rw);
}
-#define __raw_read_lock_flags(lock, flags) __raw_read_lock(lock)
-#define __raw_write_lock_flags(lock, flags) __raw_write_lock(lock)
-
#define _raw_read_relax(lock) cpu_relax()
#define _raw_write_relax(lock) cpu_relax()
diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h
index 2429b87eb28..e0a73d3eb83 100644
--- a/arch/s390/include/asm/syscall.h
+++ b/arch/s390/include/asm/syscall.h
@@ -12,6 +12,7 @@
#ifndef _ASM_SYSCALL_H
#define _ASM_SYSCALL_H 1
+#include <linux/sched.h>
#include <asm/ptrace.h>
static inline long syscall_get_nr(struct task_struct *task,
diff --git a/arch/s390/include/asm/thread_info.h b/arch/s390/include/asm/thread_info.h
index 461f2abd2e6..925bcc64903 100644
--- a/arch/s390/include/asm/thread_info.h
+++ b/arch/s390/include/asm/thread_info.h
@@ -83,14 +83,16 @@ static inline struct thread_info *current_thread_info(void)
/*
* thread information flags bit numbers
*/
-#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_RESTART_SVC 4 /* restart svc with new svc number */
-#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
#define TIF_SINGLE_STEP 6 /* deliver sigtrap on return to user */
#define TIF_MCCK_PENDING 7 /* machine check handling is pending */
+#define TIF_SYSCALL_TRACE 8 /* syscall trace active */
+#define TIF_SYSCALL_AUDIT 9 /* syscall auditing active */
+#define TIF_SECCOMP 10 /* secure computing */
+#define TIF_SYSCALL_FTRACE 11 /* ftrace syscall instrumentation */
#define TIF_USEDFPU 16 /* FPU was used by this task this quantum (SMP) */
#define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling
TIF_NEED_RESCHED */
@@ -99,15 +101,17 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_RESTORE_SIGMASK 20 /* restore signal mask in do_signal() */
#define TIF_FREEZE 21 /* thread is freezing for suspend */
-#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
#define _TIF_RESTART_SVC (1<<TIF_RESTART_SVC)
-#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_SINGLE_STEP (1<<TIF_SINGLE_STEP)
#define _TIF_MCCK_PENDING (1<<TIF_MCCK_PENDING)
+#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
+#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SECCOMP (1<<TIF_SECCOMP)
+#define _TIF_SYSCALL_FTRACE (1<<TIF_SYSCALL_FTRACE)
#define _TIF_USEDFPU (1<<TIF_USEDFPU)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_31BIT (1<<TIF_31BIT)
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index 0235970278f..8377e91533d 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -131,7 +131,7 @@ static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
#define put_user(x, ptr) \
({ \
- might_sleep(); \
+ might_fault(); \
__put_user(x, ptr); \
})
@@ -180,7 +180,7 @@ extern int __put_user_bad(void) __attribute__((noreturn));
#define get_user(x, ptr) \
({ \
- might_sleep(); \
+ might_fault(); \
__get_user(x, ptr); \
})
@@ -231,7 +231,7 @@ __copy_to_user(void __user *to, const void *from, unsigned long n)
static inline unsigned long __must_check
copy_to_user(void __user *to, const void *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_WRITE, to, n))
n = __copy_to_user(to, from, n);
return n;
@@ -282,7 +282,7 @@ __copy_from_user(void *to, const void __user *from, unsigned long n)
static inline unsigned long __must_check
copy_from_user(void *to, const void __user *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_READ, from, n))
n = __copy_from_user(to, from, n);
else
@@ -299,7 +299,7 @@ __copy_in_user(void __user *to, const void __user *from, unsigned long n)
static inline unsigned long __must_check
copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
- might_sleep();
+ might_fault();
if (__access_ok(from,n) && __access_ok(to,n))
n = __copy_in_user(to, from, n);
return n;
@@ -312,7 +312,7 @@ static inline long __must_check
strncpy_from_user(char *dst, const char __user *src, long count)
{
long res = -EFAULT;
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_READ, src, 1))
res = uaccess.strncpy_from_user(count, src, dst);
return res;
@@ -321,7 +321,7 @@ strncpy_from_user(char *dst, const char __user *src, long count)
static inline unsigned long
strnlen_user(const char __user * src, unsigned long n)
{
- might_sleep();
+ might_fault();
return uaccess.strnlen_user(n, src);
}
@@ -354,7 +354,7 @@ __clear_user(void __user *to, unsigned long n)
static inline unsigned long __must_check
clear_user(void __user *to, unsigned long n)
{
- might_sleep();
+ might_fault();
if (access_ok(VERIFY_WRITE, to, n))
n = uaccess.clear_user(n, to);
return n;
diff --git a/arch/s390/include/asm/unistd.h b/arch/s390/include/asm/unistd.h
index f0f19e6ace6..c80602d7c88 100644
--- a/arch/s390/include/asm/unistd.h
+++ b/arch/s390/include/asm/unistd.h
@@ -267,7 +267,9 @@
#define __NR_epoll_create1 327
#define __NR_preadv 328
#define __NR_pwritev 329
-#define NR_syscalls 330
+#define __NR_rt_tgsigqueueinfo 330
+#define __NR_perf_counter_open 331
+#define NR_syscalls 332
/*
* There are some system calls that are not present on 64 bit, some
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 228e3105ded..c75ed43b1a1 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -3,8 +3,9 @@
#
ifdef CONFIG_FUNCTION_TRACER
-# Do not trace early boot code
+# Don't trace early setup code and tracing code
CFLAGS_REMOVE_early.o = -pg
+CFLAGS_REMOVE_ftrace.o = -pg
endif
#
@@ -22,7 +23,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w
obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o \
processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o \
- vdso.o vtime.o sysinfo.o nmi.o
+ vdso.o vtime.o sysinfo.o nmi.o sclp.o
obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o)
obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
@@ -41,6 +42,8 @@ obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o \
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
+obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
+obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
# Kexec part
S390_KEXEC_OBJS := machine_kexec.o crash.o
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index fb38af6316b..88a83366819 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -1823,3 +1823,20 @@ compat_sys_pwritev_wrapper:
llgfr %r5,%r5 # u32
llgfr %r6,%r6 # u32
jg compat_sys_pwritev # branch to system call
+
+ .globl compat_sys_rt_tgsigqueueinfo_wrapper
+compat_sys_rt_tgsigqueueinfo_wrapper:
+ lgfr %r2,%r2 # compat_pid_t
+ lgfr %r3,%r3 # compat_pid_t
+ lgfr %r4,%r4 # int
+ llgtr %r5,%r5 # struct compat_siginfo *
+ jg compat_sys_rt_tgsigqueueinfo_wrapper # branch to system call
+
+ .globl sys_perf_counter_open_wrapper
+sys_perf_counter_open_wrapper:
+ llgtr %r2,%r2 # const struct perf_counter_attr *
+ lgfr %r3,%r3 # pid_t
+ lgfr %r4,%r4 # int
+ lgfr %r5,%r5 # int
+ llgfr %r6,%r6 # unsigned long
+ jg sys_perf_counter_open # branch to system call
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index cf09948faad..fb263736826 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -11,6 +11,7 @@
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/ctype.h>
+#include <linux/ftrace.h>
#include <linux/lockdep.h>
#include <linux/module.h>
#include <linux/pfn.h>
@@ -410,5 +411,8 @@ void __init startup_init(void)
sclp_facilities_detect();
detect_memory_layout(memory_chunk);
S390_lowcore.machine_flags = machine_flags;
+#ifdef CONFIG_DYNAMIC_FTRACE
+ S390_lowcore.ftrace_func = (unsigned long)ftrace_caller;
+#endif
lockdep_on();
}
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index f3e27593421..c4c80a22bc1 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -53,6 +53,8 @@ _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING)
+_TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
+ _TIF_SECCOMP>>8 | _TIF_SYSCALL_FTRACE>>8)
STACK_SHIFT = PAGE_SHIFT + THREAD_ORDER
STACK_SIZE = 1 << STACK_SHIFT
@@ -265,7 +267,7 @@ sysc_do_restart:
sth %r7,SP_SVCNR(%r15)
sll %r7,2 # svc number *4
l %r8,BASED(.Lsysc_table)
- tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
+ tm __TI_flags+2(%r9),_TIF_SYSCALL
l %r8,0(%r7,%r8) # get system call addr.
bnz BASED(sysc_tracesys)
basr %r14,%r8 # call sys_xxxx
@@ -405,7 +407,7 @@ sysc_tracego:
basr %r14,%r8 # call sys_xxx
st %r2,SP_R2(%r15) # store return value
sysc_tracenogo:
- tm __TI_flags+3(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
+ tm __TI_flags+2(%r9),_TIF_SYSCALL
bz BASED(sysc_return)
l %r1,BASED(.Ltrace_exit)
la %r2,SP_PTREGS(%r15) # load pt_regs
@@ -1107,6 +1109,7 @@ cleanup_io_leave_insn:
.section .rodata, "a"
#define SYSCALL(esa,esame,emu) .long esa
+ .globl sys_call_table
sys_call_table:
#include "syscalls.S"
#undef SYSCALL
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 84a105838e0..f6618e9e15e 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -56,6 +56,8 @@ _TIF_WORK_SVC = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING | _TIF_RESTART_SVC | _TIF_SINGLE_STEP )
_TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
_TIF_MCCK_PENDING)
+_TIF_SYSCALL = (_TIF_SYSCALL_TRACE>>8 | _TIF_SYSCALL_AUDIT>>8 | \
+ _TIF_SECCOMP>>8 | _TIF_SYSCALL_FTRACE>>8)
#define BASED(name) name-system_call(%r13)
@@ -260,7 +262,7 @@ sysc_do_restart:
larl %r10,sys_call_table_emu # use 31 bit emulation system calls
sysc_noemu:
#endif
- tm __TI_flags+7(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
+ tm __TI_flags+6(%r9),_TIF_SYSCALL
lgf %r8,0(%r7,%r10) # load address of system call routine
jnz sysc_tracesys
basr %r14,%r8 # call sys_xxxx
@@ -391,7 +393,7 @@ sysc_tracego:
basr %r14,%r8 # call sys_xxx
stg %r2,SP_R2(%r15) # store return value
sysc_tracenogo:
- tm __TI_flags+7(%r9),(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT)
+ tm __TI_flags+6(%r9),_TIF_SYSCALL
jz sysc_return
la %r2,SP_PTREGS(%r15) # load pt_regs
larl %r14,sysc_return # return point is sysc_return
@@ -1058,6 +1060,7 @@ cleanup_io_leave_insn:
.section .rodata, "a"
#define SYSCALL(esa,esame,emu) .long esame
+ .globl sys_call_table
sys_call_table:
#include "syscalls.S"
#undef SYSCALL
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
new file mode 100644
index 00000000000..82ddfd3a75a
--- /dev/null
+++ b/arch/s390/kernel/ftrace.c
@@ -0,0 +1,260 @@
+/*
+ * Dynamic function tracer architecture backend.
+ *
+ * Copyright IBM Corp. 2009
+ *
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
+ *
+ */
+
+#include <linux/hardirq.h>
+#include <linux/uaccess.h>
+#include <linux/ftrace.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <trace/syscall.h>
+#include <asm/lowcore.h>
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+
+void ftrace_disable_code(void);
+void ftrace_disable_return(void);
+void ftrace_call_code(void);
+void ftrace_nop_code(void);
+
+#define FTRACE_INSN_SIZE 4
+
+#ifdef CONFIG_64BIT
+
+asm(
+ " .align 4\n"
+ "ftrace_disable_code:\n"
+ " j 0f\n"
+ " .word 0x0024\n"
+ " lg %r1,"__stringify(__LC_FTRACE_FUNC)"\n"
+ " basr %r14,%r1\n"
+ "ftrace_disable_return:\n"
+ " lg %r14,8(15)\n"
+ " lgr %r0,%r0\n"
+ "0:\n");
+
+asm(
+ " .align 4\n"
+ "ftrace_nop_code:\n"
+ " j .+"__stringify(MCOUNT_INSN_SIZE)"\n");
+
+asm(
+ " .align 4\n"
+ "ftrace_call_code:\n"
+ " stg %r14,8(%r15)\n");
+
+#else /* CONFIG_64BIT */
+
+asm(
+ " .align 4\n"
+ "ftrace_disable_code:\n"
+ " j 0f\n"
+ " l %r1,"__stringify(__LC_FTRACE_FUNC)"\n"
+ " basr %r14,%r1\n"
+ "ftrace_disable_return:\n"
+ " l %r14,4(%r15)\n"
+ " j 0f\n"
+ " bcr 0,%r7\n"
+ " bcr 0,%r7\n"
+ " bcr 0,%r7\n"
+ " bcr 0,%r7\n"
+ " bcr 0,%r7\n"
+ " bcr 0,%r7\n"
+ "0:\n");
+
+asm(
+ " .align 4\n"
+ "ftrace_nop_code:\n"
+ " j .+"__stringify(MCOUNT_INSN_SIZE)"\n");
+
+asm(
+ " .align 4\n"
+ "ftrace_call_code:\n"
+ " st %r14,4(%r15)\n");
+
+#endif /* CONFIG_64BIT */
+
+static int ftrace_modify_code(unsigned long ip,
+ void *old_code, int old_size,
+ void *new_code, int new_size)
+{
+ unsigned char replaced[MCOUNT_INSN_SIZE];
+
+ /*
+ * Note: Due to modules code can disappear and change.
+ * We need to protect against faulting as well as code
+ * changing. We do this by using the probe_kernel_*
+ * functions.
+ * This however is just a simple sanity check.
+ */
+ if (probe_kernel_read(replaced, (void *)ip, old_size))
+ return -EFAULT;
+ if (memcmp(replaced, old_code, old_size) != 0)
+ return -EINVAL;
+ if (probe_kernel_write((void *)ip, new_code, new_size))
+ return -EPERM;
+ return 0;
+}
+
+static int ftrace_make_initial_nop(struct module *mod, struct dyn_ftrace *rec,
+ unsigned long addr)
+{
+ return ftrace_modify_code(rec->ip,
+ ftrace_call_code, FTRACE_INSN_SIZE,
+ ftrace_disable_code, MCOUNT_INSN_SIZE);
+}
+
+int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
+ unsigned long addr)
+{
+ if (addr == MCOUNT_ADDR)
+ return ftrace_make_initial_nop(mod, rec, addr);
+ return ftrace_modify_code(rec->ip,
+ ftrace_call_code, FTRACE_INSN_SIZE,
+ ftrace_nop_code, FTRACE_INSN_SIZE);
+}
+
+int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr)
+{
+ return ftrace_modify_code(rec->ip,
+ ftrace_nop_code, FTRACE_INSN_SIZE,
+ ftrace_call_code, FTRACE_INSN_SIZE);
+}
+
+int ftrace_update_ftrace_func(ftrace_func_t func)
+{
+ ftrace_dyn_func = (unsigned long)func;
+ return 0;
+}
+
+int __init ftrace_dyn_arch_init(void *data)
+{
+ *(unsigned long *)data = 0;
+ return 0;
+}
+
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+#ifdef CONFIG_DYNAMIC_FTRACE
+/*
+ * Patch the kernel code at ftrace_graph_caller location:
+ * The instruction there is branch relative on condition. The condition mask
+ * is either all ones (always branch aka disable ftrace_graph_caller) or all
+ * zeroes (nop aka enable ftrace_graph_caller).
+ * Instruction format for brc is a7m4xxxx where m is the condition mask.
+ */
+int ftrace_enable_ftrace_graph_caller(void)
+{
+ unsigned short opcode = 0xa704;
+
+ return probe_kernel_write(ftrace_graph_caller, &opcode, sizeof(opcode));
+}
+
+int ftrace_disable_ftrace_graph_caller(void)
+{
+ unsigned short opcode = 0xa7f4;
+
+ return probe_kernel_write(ftrace_graph_caller, &opcode, sizeof(opcode));
+}
+
+static inline unsigned long ftrace_mcount_call_adjust(unsigned long addr)
+{
+ return addr - (ftrace_disable_return - ftrace_disable_code);
+}
+
+#else /* CONFIG_DYNAMIC_FTRACE */
+
+static inline unsigned long ftrace_mcount_call_adjust(unsigned long addr)
+{
+ return addr - MCOUNT_OFFSET_RET;
+}
+
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
+/*
+ * Hook the return address and push it in the stack of return addresses
+ * in current thread info.
+ */
+unsigned long prepare_ftrace_return(unsigned long ip, unsigned long parent)
+{
+ struct ftrace_graph_ent trace;
+
+ /* Nmi's are currently unsupported. */
+ if (unlikely(in_nmi()))
+ goto out;
+ if (unlikely(atomic_read(&current->tracing_graph_pause)))
+ goto out;
+ if (ftrace_push_return_trace(parent, ip, &trace.depth) == -EBUSY)
+ goto out;
+ trace.func = ftrace_mcount_call_adjust(ip) & PSW_ADDR_INSN;
+ /* Only trace if the calling function expects to. */
+ if (!ftrace_graph_entry(&trace)) {
+ current->curr_ret_stack--;
+ goto out;
+ }
+ parent = (unsigned long)return_to_handler;
+out:
+ return parent;
+}
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
+#ifdef CONFIG_FTRACE_SYSCALLS
+
+extern unsigned long __start_syscalls_metadata[];
+extern unsigned long __stop_syscalls_metadata[];
+extern unsigned int sys_call_table[];
+
+static struct syscall_metadata **syscalls_metadata;
+
+struct syscall_metadata *syscall_nr_to_meta(int nr)
+{
+ if (!syscalls_metadata || nr >= NR_syscalls || nr < 0)
+ return NULL;
+
+ return syscalls_metadata[nr];
+}
+
+static struct syscall_metadata *find_syscall_meta(unsigned long syscall)
+{
+ struct syscall_metadata *start;
+ struct syscall_metadata *stop;
+ char str[KSYM_SYMBOL_LEN];
+
+ start = (struct syscall_metadata *)__start_syscalls_metadata;
+ stop = (struct syscall_metadata *)__stop_syscalls_metadata;
+ kallsyms_lookup(syscall, NULL, NULL, NULL, str);
+
+ for ( ; start < stop; start++) {
+ if (start->name && !strcmp(start->name + 3, str + 3))
+ return start;
+ }
+ return NULL;
+}
+
+void arch_init_ftrace_syscalls(void)
+{
+ struct syscall_metadata *meta;
+ int i;
+ static atomic_t refs;
+
+ if (atomic_inc_return(&refs) != 1)
+ goto out;
+ syscalls_metadata = kzalloc(sizeof(*syscalls_metadata) * NR_syscalls,
+ GFP_KERNEL);
+ if (!syscalls_metadata)
+ goto out;
+ for (i = 0; i < NR_syscalls; i++) {
+ meta = find_syscall_meta((unsigned long)sys_call_table[i]);
+ syscalls_metadata[i] = meta;
+ }
+ return;
+out:
+ atomic_dec(&refs);
+}
+#endif
diff --git a/arch/s390/kernel/head.S b/arch/s390/kernel/head.S
index 22596d70fc2..6d227413cbe 100644
--- a/arch/s390/kernel/head.S
+++ b/arch/s390/kernel/head.S
@@ -1,7 +1,5 @@
/*
- * arch/s390/kernel/head.S
- *
- * Copyright (C) IBM Corp. 1999,2006
+ * Copyright IBM Corp. 1999,2009
*
* Author(s): Hartmut Penner <hp@de.ibm.com>
* Martin Schwidefsky <schwidefsky@de.ibm.com>
@@ -479,27 +477,58 @@ startup:basr %r13,0 # get base
mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
mvc __LC_EXIT_TIMER(8),5f-.LPG0(%r13)
#ifndef CONFIG_MARCH_G5
- # check processor version against MARCH_{G5,Z900,Z990,Z9_109,Z10}
- stidp __LC_CPUID # store cpuid
- lhi %r0,(3f-2f) / 2
- la %r1,2f-.LPG0(%r13)
-0: clc __LC_CPUID+4(2),0(%r1)
- jne 3f
- lpsw 1f-.LPG0(13) # machine type not good enough, crash
+ # check capabilities against MARCH_{G5,Z900,Z990,Z9_109,Z10}
+ xc __LC_STFL_FAC_LIST(8),__LC_STFL_FAC_LIST
+ stfl __LC_STFL_FAC_LIST # store facility list
+ tm __LC_STFL_FAC_LIST,0x01 # stfle available ?
+ jz 0f
+ la %r0,0
+ .insn s,0xb2b00000,__LC_STFL_FAC_LIST # store facility list extended
+0: l %r0,__LC_STFL_FAC_LIST
+ n %r0,2f+8-.LPG0(%r13)
+ cl %r0,2f+8-.LPG0(%r13)
+ jne 1f
+ l %r0,__LC_STFL_FAC_LIST+4
+ n %r0,2f+12-.LPG0(%r13)
+ cl %r0,2f+12-.LPG0(%r13)
+ je 3f
+1: l %r15,.Lstack-.LPG0(%r13)
+ ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
+ ahi %r15,-96
+ la %r2,.Lals_string-.LPG0(%r13)
+ l %r3,.Lsclp_print-.LPG0(%r13)
+ basr %r14,%r3
+ lpsw 2f-.LPG0(%r13) # machine type not good enough, crash
+.Lals_string:
+ .asciz "The Linux kernel requires more recent processor hardware"
+.Lsclp_print:
+ .long _sclp_print_early
+.Lstack:
+ .long init_thread_union
.align 16
-1: .long 0x000a0000,0x00000000
-2:
+2: .long 0x000a0000,0x8badcccc
+#if defined(CONFIG_64BIT)
#if defined(CONFIG_MARCH_Z10)
- .short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086, 0x2094, 0x2096
+ .long 0xc100efe3, 0xf0680000
#elif defined(CONFIG_MARCH_Z9_109)
- .short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086
+ .long 0xc100efc3, 0x00000000
#elif defined(CONFIG_MARCH_Z990)
- .short 0x9672, 0x2064, 0x2066
+ .long 0xc0002000, 0x00000000
#elif defined(CONFIG_MARCH_Z900)
- .short 0x9672
+ .long 0xc0000000, 0x00000000
+#endif
+#else
+#if defined(CONFIG_MARCH_Z10)
+ .long 0x8100c880, 0x00000000
+#elif defined(CONFIG_MARCH_Z9_109)
+ .long 0x8100c880, 0x00000000
+#elif defined(CONFIG_MARCH_Z990)
+ .long 0x80002000, 0x00000000
+#elif defined(CONFIG_MARCH_Z900)
+ .long 0x80000000, 0x00000000
+#endif
#endif
-3: la %r1,2(%r1)
- brct %r0,0b
+3:
#endif
l %r13,4f-.LPG0(%r13)
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index a01cf0284db..9bb2f6241d9 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -25,9 +25,9 @@
#include <linux/preempt.h>
#include <linux/stop_machine.h>
#include <linux/kdebug.h>
+#include <linux/uaccess.h>
#include <asm/cacheflush.h>
#include <asm/sections.h>
-#include <asm/uaccess.h>
#include <linux/module.h>
DEFINE_PER_CPU(struct kprobe *, current_kprobe) = NULL;
@@ -155,35 +155,8 @@ void __kprobes get_instruction_type(struct arch_specific_insn *ainsn)
static int __kprobes swap_instruction(void *aref)
{
struct ins_replace_args *args = aref;
- u32 *addr;
- u32 instr;
- int err = -EFAULT;
- /*
- * Text segment is read-only, hence we use stura to bypass dynamic
- * address translation to exchange the instruction. Since stura
- * always operates on four bytes, but we only want to exchange two
- * bytes do some calculations to get things right. In addition we
- * shall not cross any page boundaries (vmalloc area!) when writing
- * the new instruction.
- */
- addr = (u32 *)((unsigned long)args->ptr & -4UL);
- if ((unsigned long)args->ptr & 2)
- instr = ((*addr) & 0xffff0000) | args->new;
- else
- instr = ((*addr) & 0x0000ffff) | args->new << 16;
-
- asm volatile(
- " lra %1,0(%1)\n"
- "0: stura %2,%1\n"
- "1: la %0,0\n"
- "2:\n"
- EX_TABLE(0b,2b)
- : "+d" (err)
- : "a" (addr), "d" (instr)
- : "memory", "cc");
-
- return err;
+ return probe_kernel_write(args->ptr, &args->new, sizeof(args->new));
}
void __kprobes arch_arm_kprobe(struct kprobe *p)
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index 80641224a09..2a0a5e97ba8 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -1,5 +1,5 @@
/*
- * Copyright IBM Corp. 2008
+ * Copyright IBM Corp. 2008,2009
*
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
*
@@ -7,36 +7,64 @@
#include <asm/asm-offsets.h>
-#ifndef CONFIG_64BIT
-.globl _mcount
+ .globl ftrace_stub
+ftrace_stub:
+ br %r14
+
+#ifdef CONFIG_64BIT
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+
+ .globl _mcount
_mcount:
- stm %r0,%r5,8(%r15)
- st %r14,56(%r15)
- lr %r1,%r15
- ahi %r15,-96
- l %r3,100(%r15)
- la %r2,0(%r14)
- st %r1,__SF_BACKCHAIN(%r15)
- la %r3,0(%r3)
- bras %r14,0f
- .long ftrace_trace_function
-0: l %r14,0(%r14)
- l %r14,0(%r14)
- basr %r14,%r14
- ahi %r15,96
- lm %r0,%r5,8(%r15)
- l %r14,56(%r15)
br %r14
-.globl ftrace_stub
-ftrace_stub:
+ .globl ftrace_caller
+ftrace_caller:
+ larl %r1,function_trace_stop
+ icm %r1,0xf,0(%r1)
+ bnzr %r14
+ stmg %r2,%r5,32(%r15)
+ stg %r14,112(%r15)
+ lgr %r1,%r15
+ aghi %r15,-160
+ stg %r1,__SF_BACKCHAIN(%r15)
+ lgr %r2,%r14
+ lg %r3,168(%r15)
+ larl %r14,ftrace_dyn_func
+ lg %r14,0(%r14)
+ basr %r14,%r14
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ .globl ftrace_graph_caller
+ftrace_graph_caller:
+ # This unconditional branch gets runtime patched. Change only if
+ # you know what you are doing. See ftrace_enable_graph_caller().
+ j 0f
+ lg %r2,272(%r15)
+ lg %r3,168(%r15)
+ brasl %r14,prepare_ftrace_return
+ stg %r2,168(%r15)
+0:
+#endif
+ aghi %r15,160
+ lmg %r2,%r5,32(%r15)
+ lg %r14,112(%r15)
br %r14
-#else /* CONFIG_64BIT */
+ .data
+ .globl ftrace_dyn_func
+ftrace_dyn_func:
+ .quad ftrace_stub
+ .previous
+
+#else /* CONFIG_DYNAMIC_FTRACE */
-.globl _mcount
+ .globl _mcount
_mcount:
- stmg %r0,%r5,16(%r15)
+ larl %r1,function_trace_stop
+ icm %r1,0xf,0(%r1)
+ bnzr %r14
+ stmg %r2,%r5,32(%r15)
stg %r14,112(%r15)
lgr %r1,%r15
aghi %r15,-160
@@ -46,13 +74,143 @@ _mcount:
larl %r14,ftrace_trace_function
lg %r14,0(%r14)
basr %r14,%r14
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ lg %r2,272(%r15)
+ lg %r3,168(%r15)
+ brasl %r14,prepare_ftrace_return
+ stg %r2,168(%r15)
+#endif
aghi %r15,160
- lmg %r0,%r5,16(%r15)
+ lmg %r2,%r5,32(%r15)
lg %r14,112(%r15)
br %r14
-.globl ftrace_stub
-ftrace_stub:
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+
+ .globl return_to_handler
+return_to_handler:
+ stmg %r2,%r5,32(%r15)
+ lgr %r1,%r15
+ aghi %r15,-160
+ stg %r1,__SF_BACKCHAIN(%r15)
+ brasl %r14,ftrace_return_to_handler
+ aghi %r15,160
+ lgr %r14,%r2
+ lmg %r2,%r5,32(%r15)
+ br %r14
+
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
+#else /* CONFIG_64BIT */
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+
+ .globl _mcount
+_mcount:
+ br %r14
+
+ .globl ftrace_caller
+ftrace_caller:
+ stm %r2,%r5,16(%r15)
+ bras %r1,2f
+0: .long ftrace_trace_function
+1: .long function_trace_stop
+2: l %r2,1b-0b(%r1)
+ icm %r2,0xf,0(%r2)
+ jnz 3f
+ st %r14,56(%r15)
+ lr %r0,%r15
+ ahi %r15,-96
+ l %r3,100(%r15)
+ la %r2,0(%r14)
+ st %r0,__SF_BACKCHAIN(%r15)
+ la %r3,0(%r3)
+ l %r14,0b-0b(%r1)
+ l %r14,0(%r14)
+ basr %r14,%r14
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ .globl ftrace_graph_caller
+ftrace_graph_caller:
+ # This unconditional branch gets runtime patched. Change only if
+ # you know what you are doing. See ftrace_enable_graph_caller().
+ j 1f
+ bras %r1,0f
+ .long prepare_ftrace_return
+0: l %r2,152(%r15)
+ l %r4,0(%r1)
+ l %r3,100(%r15)
+ basr %r14,%r4
+ st %r2,100(%r15)
+1:
+#endif
+ ahi %r15,96
+ l %r14,56(%r15)
+3: lm %r2,%r5,16(%r15)
br %r14
+ .data
+ .globl ftrace_dyn_func
+ftrace_dyn_func:
+ .long ftrace_stub
+ .previous
+
+#else /* CONFIG_DYNAMIC_FTRACE */
+
+ .globl _mcount
+_mcount:
+ stm %r2,%r5,16(%r15)
+ bras %r1,2f
+0: .long ftrace_trace_function
+1: .long function_trace_stop
+2: l %r2,1b-0b(%r1)
+ icm %r2,0xf,0(%r2)
+ jnz 3f
+ st %r14,56(%r15)
+ lr %r0,%r15
+ ahi %r15,-96
+ l %r3,100(%r15)
+ la %r2,0(%r14)
+ st %r0,__SF_BACKCHAIN(%r15)
+ la %r3,0(%r3)
+ l %r14,0b-0b(%r1)
+ l %r14,0(%r14)
+ basr %r14,%r14
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+ bras %r1,0f
+ .long prepare_ftrace_return
+0: l %r2,152(%r15)
+ l %r4,0(%r1)
+ l %r3,100(%r15)
+ basr %r14,%r4
+ st %r2,100(%r15)
+#endif
+ ahi %r15,96
+ l %r14,56(%r15)
+3: lm %r2,%r5,16(%r15)
+ br %r14
+
+#endif /* CONFIG_DYNAMIC_FTRACE */
+
+#ifdef CONFIG_FUNCTION_GRAPH_TRACER
+
+ .globl return_to_handler
+return_to_handler:
+ stm %r2,%r5,16(%r15)
+ st %r14,56(%r15)
+ lr %r0,%r15
+ ahi %r15,-96
+ st %r0,__SF_BACKCHAIN(%r15)
+ bras %r1,0f
+ .long ftrace_return_to_handler
+0: l %r2,0b-0b(%r1)
+ basr %r14,%r2
+ lr %r14,%r2
+ ahi %r15,96
+ lm %r2,%r5,16(%r15)
+ br %r14
+
+#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
+
#endif /* CONFIG_64BIT */
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c
index 28cf196ba77..015e27da40e 100644
--- a/arch/s390/kernel/nmi.c
+++ b/arch/s390/kernel/nmi.c
@@ -16,7 +16,7 @@
#include <asm/lowcore.h>
#include <asm/smp.h>
#include <asm/etr.h>
-#include <asm/cpu.h>
+#include <asm/cputime.h>
#include <asm/nmi.h>
#include <asm/crw.h>
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index a3acd8e60af..355f7a30c3f 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 <asm/compat.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/system.h>
@@ -204,7 +205,7 @@ int copy_thread(unsigned long clone_flags, unsigned long new_stackp,
save_fp_regs(&p->thread.fp_regs);
/* Set a new TLS ? */
if (clone_flags & CLONE_SETTLS) {
- if (test_thread_flag(TIF_31BIT)) {
+ if (is_compat_task()) {
p->thread.acrs[0] = (unsigned int) regs->gprs[6];
} else {
p->thread.acrs[0] = (unsigned int)(regs->gprs[6] >> 32);
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 75c496f4f16..490b39934d6 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -36,7 +36,9 @@
#include <linux/elf.h>
#include <linux/regset.h>
#include <linux/tracehook.h>
-
+#include <linux/seccomp.h>
+#include <trace/syscall.h>
+#include <asm/compat.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@@ -69,7 +71,7 @@ FixPerRegisters(struct task_struct *task)
if (per_info->single_step) {
per_info->control_regs.bits.starting_addr = 0;
#ifdef CONFIG_COMPAT
- if (test_thread_flag(TIF_31BIT))
+ if (is_compat_task())
per_info->control_regs.bits.ending_addr = 0x7fffffffUL;
else
#endif
@@ -482,8 +484,7 @@ static int peek_user_compat(struct task_struct *child,
{
__u32 tmp;
- if (!test_thread_flag(TIF_31BIT) ||
- (addr & 3) || addr > sizeof(struct user) - 3)
+ if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user) - 3)
return -EIO;
tmp = __peek_user_compat(child, addr);
@@ -584,8 +585,7 @@ static int __poke_user_compat(struct task_struct *child,
static int poke_user_compat(struct task_struct *child,
addr_t addr, addr_t data)
{
- if (!test_thread_flag(TIF_31BIT) ||
- (addr & 3) || addr > sizeof(struct user32) - 3)
+ if (!is_compat_task() || (addr & 3) || addr > sizeof(struct user32) - 3)
return -EIO;
return __poke_user_compat(child, addr, data);
@@ -642,6 +642,9 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
long ret;
+ /* Do the secure computing check first. */
+ secure_computing(regs->gprs[2]);
+
/*
* The sysc_tracesys code in entry.S stored the system
* call number to gprs[2].
@@ -659,8 +662,11 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
ret = -1;
}
+ if (unlikely(test_thread_flag(TIF_SYSCALL_FTRACE)))
+ ftrace_syscall_enter(regs);
+
if (unlikely(current->audit_context))
- audit_syscall_entry(test_thread_flag(TIF_31BIT) ?
+ audit_syscall_entry(is_compat_task() ?
AUDIT_ARCH_S390 : AUDIT_ARCH_S390X,
regs->gprs[2], regs->orig_gpr2,
regs->gprs[3], regs->gprs[4],
@@ -674,6 +680,9 @@ asmlinkage void do_syscall_trace_exit(struct pt_regs *regs)
audit_syscall_exit(AUDITSC_RESULT(regs->gprs[2]),
regs->gprs[2]);
+ if (unlikely(test_thread_flag(TIF_SYSCALL_FTRACE)))
+ ftrace_syscall_exit(regs);
+
if (test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, 0);
}
diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c
index a0d2d55d7fb..0de305b598c 100644
--- a/arch/s390/kernel/s390_ext.c
+++ b/arch/s390/kernel/s390_ext.c
@@ -10,10 +10,11 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
+#include <linux/ftrace.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
-#include <asm/cpu.h>
+#include <asm/cputime.h>
#include <asm/lowcore.h>
#include <asm/s390_ext.h>
#include <asm/irq_regs.h>
@@ -112,7 +113,7 @@ int unregister_early_external_interrupt(__u16 code, ext_int_handler_t handler,
return 0;
}
-void do_extint(struct pt_regs *regs, unsigned short code)
+void __irq_entry do_extint(struct pt_regs *regs, unsigned short code)
{
ext_int_info_t *p;
int index;
diff --git a/arch/s390/kernel/sclp.S b/arch/s390/kernel/sclp.S
new file mode 100644
index 00000000000..20639dfe0c4
--- /dev/null
+++ b/arch/s390/kernel/sclp.S
@@ -0,0 +1,327 @@
+/*
+ * Mini SCLP driver.
+ *
+ * Copyright IBM Corp. 2004,2009
+ *
+ * Author(s): Peter Oberparleiter <Peter.Oberparleiter@de.ibm.com>,
+ * Heiko Carstens <heiko.carstens@de.ibm.com>,
+ *
+ */
+
+LC_EXT_NEW_PSW = 0x58 # addr of ext int handler
+LC_EXT_INT_PARAM = 0x80 # addr of ext int parameter
+LC_EXT_INT_CODE = 0x86 # addr of ext int code
+
+#
+# Subroutine which waits synchronously until either an external interruption
+# or a timeout occurs.
+#
+# Parameters:
+# R2 = 0 for no timeout, non-zero for timeout in (approximated) seconds
+#
+# Returns:
+# R2 = 0 on interrupt, 2 on timeout
+# 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
+.LbaseS1:
+ ahi %r15,-96 # create stack frame
+ la %r8,LC_EXT_NEW_PSW # register int handler
+ mvc .LoldpswS1-.LbaseS1(8,%r13),0(%r8)
+ mvc 0(8,%r8),.LextpswS1-.LbaseS1(%r13)
+ lhi %r6,0x0200 # cr mask for ext int (cr0.54)
+ ltr %r2,%r2
+ jz .LsetctS1
+ ahi %r6,0x0800 # cr mask for clock int (cr0.52)
+ stck .LtimeS1-.LbaseS1(%r13) # initiate timeout
+ al %r2,.LtimeS1-.LbaseS1(%r13)
+ st %r2,.LtimeS1-.LbaseS1(%r13)
+ sckc .LtimeS1-.LbaseS1(%r13)
+
+.LsetctS1:
+ stctl %c0,%c0,.LctlS1-.LbaseS1(%r13) # enable required interrupts
+ l %r0,.LctlS1-.LbaseS1(%r13)
+ lhi %r1,~(0x200 | 0x800) # clear old values
+ nr %r1,%r0
+ or %r1,%r6 # set new value
+ st %r1,.LctlS1-.LbaseS1(%r13)
+ lctl %c0,%c0,.LctlS1-.LbaseS1(%r13)
+ st %r0,.LctlS1-.LbaseS1(%r13)
+ lhi %r2,2 # return code for timeout
+.LloopS1:
+ lpsw .LwaitpswS1-.LbaseS1(%r13) # wait until interrupt
+.LwaitS1:
+ lh %r7,LC_EXT_INT_CODE
+ chi %r7,0x1004 # timeout?
+ je .LtimeoutS1
+ chi %r7,0x2401 # service int?
+ jne .LloopS1
+ sr %r2,%r2
+ l %r3,LC_EXT_INT_PARAM
+.LtimeoutS1:
+ lctl %c0,%c0,.LctlS1-.LbaseS1(%r13) # restore interrupt setting
+ # restore old handler
+ mvc 0(8,%r8),.LoldpswS1-.LbaseS1(%r13)
+ lm %r6,%r15,120(%r15) # restore registers
+ br %r14 # return to caller
+
+ .align 8
+.LoldpswS1:
+ .long 0, 0 # old ext int PSW
+.LextpswS1:
+ .long 0x00080000, 0x80000000+.LwaitS1 # PSW to handle ext int
+.LwaitpswS1:
+ .long 0x010a0000, 0x00000000+.LloopS1 # PSW to wait for ext int
+.LtimeS1:
+ .quad 0 # current time
+.LctlS1:
+ .long 0 # CT0 contents
+
+#
+# Subroutine to synchronously issue a service call.
+#
+# Parameters:
+# R2 = command word
+# R3 = sccb address
+#
+# Returns:
+# R2 = 0 on success, 1 on failure
+# R3 = sccb response code if R2 = 0
+#
+
+_sclp_servc:
+ stm %r6,%r15,24(%r15) # save registers
+ ahi %r15,-96 # create stack frame
+ lr %r6,%r2 # save command word
+ lr %r7,%r3 # save sccb address
+.LretryS2:
+ lhi %r2,1 # error return code
+ .insn rre,0xb2200000,%r6,%r7 # servc
+ brc 1,.LendS2 # exit if not operational
+ brc 8,.LnotbusyS2 # go on if not busy
+ sr %r2,%r2 # wait until no longer busy
+ bras %r14,_sclp_wait_int
+ j .LretryS2 # retry
+.LnotbusyS2:
+ sr %r2,%r2 # wait until result
+ bras %r14,_sclp_wait_int
+ sr %r2,%r2
+ lh %r3,6(%r7)
+.LendS2:
+ lm %r6,%r15,120(%r15) # restore registers
+ br %r14
+
+#
+# Subroutine to set up the SCLP interface.
+#
+# Parameters:
+# R2 = 0 to activate, non-zero to deactivate
+#
+# Returns:
+# R2 = 0 on success, non-zero on failure
+#
+
+_sclp_setup:
+ stm %r6,%r15,24(%r15) # save registers
+ ahi %r15,-96 # create stack frame
+ basr %r13,0 # get base register
+.LbaseS3:
+ l %r6,.LsccbS0-.LbaseS3(%r13) # prepare init mask sccb
+ mvc 0(.LinitendS3-.LinitsccbS3,%r6),.LinitsccbS3-.LbaseS3(%r13)
+ ltr %r2,%r2 # initialization?
+ jz .LdoinitS3 # go ahead
+ # clear masks
+ xc .LinitmaskS3-.LinitsccbS3(8,%r6),.LinitmaskS3-.LinitsccbS3(%r6)
+.LdoinitS3:
+ l %r2,.LwritemaskS3-.LbaseS3(%r13)# get command word
+ lr %r3,%r6 # get sccb address
+ bras %r14,_sclp_servc # issue service call
+ ltr %r2,%r2 # servc successful?
+ jnz .LerrorS3
+ chi %r3,0x20 # write mask successful?
+ jne .LerrorS3
+ # check masks
+ la %r2,.LinitmaskS3-.LinitsccbS3(%r6)
+ l %r1,0(%r2) # receive mask ok?
+ n %r1,12(%r2)
+ cl %r1,0(%r2)
+ jne .LerrorS3
+ l %r1,4(%r2) # send mask ok?
+ n %r1,8(%r2)
+ cl %r1,4(%r2)
+ sr %r2,%r2
+ je .LendS3
+.LerrorS3:
+ lhi %r2,1 # error return code
+.LendS3:
+ lm %r6,%r15,120(%r15) # restore registers
+ br %r14
+.LwritemaskS3:
+ .long 0x00780005 # SCLP command for write mask
+.LinitsccbS3:
+ .word .LinitendS3-.LinitsccbS3
+ .byte 0,0,0,0
+ .word 0
+ .word 0
+ .word 4
+.LinitmaskS3:
+ .long 0x80000000
+ .long 0x40000000
+ .long 0
+ .long 0
+.LinitendS3:
+
+#
+# Subroutine which prints a given text to the SCLP console.
+#
+# Parameters:
+# R2 = address of nil-terminated ASCII text
+#
+# Returns:
+# R2 = 0 on success, 1 on failure
+#
+
+_sclp_print:
+ stm %r6,%r15,24(%r15) # save registers
+ ahi %r15,-96 # create stack frame
+ basr %r13,0 # get base register
+.LbaseS4:
+ l %r8,.LsccbS0-.LbaseS4(%r13) # prepare write data sccb
+ mvc 0(.LmtoS4-.LwritesccbS4,%r8),.LwritesccbS4-.LbaseS4(%r13)
+ la %r7,.LmtoS4-.LwritesccbS4(%r8) # current mto addr
+ sr %r0,%r0
+ l %r10,.Lascebc-.LbaseS4(%r13) # address of translation table
+.LinitmtoS4:
+ # initialize mto
+ mvc 0(.LmtoendS4-.LmtoS4,%r7),.LmtoS4-.LbaseS4(%r13)
+ lhi %r6,.LmtoendS4-.LmtoS4 # current mto length
+.LloopS4:
+ ic %r0,0(%r2) # get character
+ ahi %r2,1
+ ltr %r0,%r0 # end of string?
+ jz .LfinalizemtoS4
+ chi %r0,0x15 # end of line (NL)?
+ jz .LfinalizemtoS4
+ stc %r0,0(%r6,%r7) # copy to mto
+ la %r11,0(%r6,%r7)
+ tr 0(1,%r11),0(%r10) # translate to EBCDIC
+ ahi %r6,1
+ j .LloopS4
+.LfinalizemtoS4:
+ sth %r6,0(%r7) # update mto length
+ lh %r9,.LmdbS4-.LwritesccbS4(%r8) # update mdb length
+ ar %r9,%r6
+ sth %r9,.LmdbS4-.LwritesccbS4(%r8)
+ lh %r9,.LevbufS4-.LwritesccbS4(%r8)# update evbuf length
+ ar %r9,%r6
+ sth %r9,.LevbufS4-.LwritesccbS4(%r8)
+ lh %r9,0(%r8) # update sccb length
+ ar %r9,%r6
+ sth %r9,0(%r8)
+ ar %r7,%r6 # update current mto adress
+ ltr %r0,%r0 # more characters?
+ jnz .LinitmtoS4
+ l %r2,.LwritedataS4-.LbaseS4(%r13)# write data
+ lr %r3,%r8
+ bras %r14,_sclp_servc
+ ltr %r2,%r2 # servc successful?
+ jnz .LendS4
+ chi %r3,0x20 # write data successful?
+ je .LendS4
+ lhi %r2,1 # error return code
+.LendS4:
+ lm %r6,%r15,120(%r15) # restore registers
+ br %r14
+
+#
+# Function which prints a given text to the SCLP console.
+#
+# Parameters:
+# R2 = address of nil-terminated ASCII text
+#
+# Returns:
+# R2 = 0 on success, 1 on failure
+#
+
+ .globl _sclp_print_early
+_sclp_print_early:
+ stm %r6,%r15,24(%r15) # save registers
+ ahi %r15,-96 # create stack frame
+ lr %r10,%r2 # save string pointer
+ lhi %r2,0
+ bras %r14,_sclp_setup # enable console
+ ltr %r2,%r2
+ jnz .LendS5
+ lr %r2,%r10
+ bras %r14,_sclp_print # print string
+ ltr %r2,%r2
+ jnz .LendS5
+ lhi %r2,1
+ bras %r14,_sclp_setup # disable console
+.LendS5:
+ lm %r6,%r15,120(%r15) # restore registers
+ br %r14
+
+.LwritedataS4:
+ .long 0x00760005 # SCLP command for write data
+.LwritesccbS4:
+ # sccb
+ .word .LmtoS4-.LwritesccbS4
+ .byte 0
+ .byte 0,0,0
+ .word 0
+
+ # evbuf
+.LevbufS4:
+ .word .LmtoS4-.LevbufS4
+ .byte 0x02
+ .byte 0
+ .word 0
+
+.LmdbS4:
+ # mdb
+ .word .LmtoS4-.LmdbS4
+ .word 1
+ .long 0xd4c4c240
+ .long 1
+
+ # go
+.LgoS4:
+ .word .LmtoS4-.LgoS4
+ .word 1
+ .long 0
+ .byte 0,0,0,0,0,0,0,0
+ .byte 0,0,0
+ .byte 0
+ .byte 0,0,0,0,0,0,0
+ .byte 0
+ .word 0
+ .byte 0,0,0,0,0,0,0,0,0,0
+ .byte 0,0,0,0,0,0,0,0
+ .byte 0,0,0,0,0,0,0,0
+
+.LmtoS4:
+ .word .LmtoendS4-.LmtoS4
+ .word 4
+ .word 0x1000
+ .byte 0
+ .byte 0,0,0
+.LmtoendS4:
+
+ # Global constants
+.LsccbS0:
+ .long _sclp_work_area
+.Lascebc:
+ .long _ascebc
+.previous
+
+.section ".init.data","a"
+ .balign 4096
+_sclp_work_area:
+ .fill 4096
+.previous
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 7402b6a39ea..9717717c6fe 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -42,6 +42,7 @@
#include <linux/ctype.h>
#include <linux/reboot.h>
#include <linux/topology.h>
+#include <linux/ftrace.h>
#include <asm/ipl.h>
#include <asm/uaccess.h>
@@ -442,6 +443,7 @@ setup_lowcore(void)
lc->steal_timer = S390_lowcore.steal_timer;
lc->last_update_timer = S390_lowcore.last_update_timer;
lc->last_update_clock = S390_lowcore.last_update_clock;
+ lc->ftrace_func = S390_lowcore.ftrace_func;
set_prefix((u32)(unsigned long) lc);
lowcore_ptr[0] = lc;
}
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 3cf74c3ccb6..062bd64e65f 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -26,6 +26,7 @@
#include <linux/binfmts.h>
#include <linux/tracehook.h>
#include <linux/syscalls.h>
+#include <linux/compat.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
#include <asm/lowcore.h>
@@ -482,7 +483,7 @@ void do_signal(struct pt_regs *regs)
/* Whee! Actually deliver the signal. */
int ret;
#ifdef CONFIG_COMPAT
- if (test_thread_flag(TIF_31BIT)) {
+ if (is_compat_task()) {
ret = handle_signal32(signr, &ka, &info, oldset, regs);
}
else
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index a985a3ba440..cc8c484984e 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -47,7 +47,7 @@
#include <asm/timer.h>
#include <asm/lowcore.h>
#include <asm/sclp.h>
-#include <asm/cpu.h>
+#include <asm/cputime.h>
#include <asm/vdso.h>
#include "entry.h"
@@ -572,6 +572,7 @@ int __cpuinit __cpu_up(unsigned int cpu)
cpu_lowcore->cpu_nr = cpu;
cpu_lowcore->kernel_asce = S390_lowcore.kernel_asce;
cpu_lowcore->machine_flags = S390_lowcore.machine_flags;
+ cpu_lowcore->ftrace_func = S390_lowcore.ftrace_func;
eieio();
while (signal_processor(cpu, sigp_restart) == sigp_busy)
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 2c7739fe70b..ad1acd20038 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -338,3 +338,5 @@ SYSCALL(sys_dup3,sys_dup3,sys_dup3_wrapper)
SYSCALL(sys_epoll_create1,sys_epoll_create1,sys_epoll_create1_wrapper)
SYSCALL(sys_preadv,sys_preadv,compat_sys_preadv_wrapper)
SYSCALL(sys_pwritev,sys_pwritev,compat_sys_pwritev_wrapper)
+SYSCALL(sys_rt_tgsigqueueinfo,sys_rt_tgsigqueueinfo,compat_sys_rt_tgsigqueueinfo_wrapper) /* 330 */
+SYSCALL(sys_perf_counter_open,sys_perf_counter_open,sys_perf_counter_open_wrapper)
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index ef596d02057..215330a2c12 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -70,7 +70,7 @@ static DEFINE_PER_CPU(struct clock_event_device, comparators);
/*
* Scheduler clock - returns current time in nanosec units.
*/
-unsigned long long sched_clock(void)
+unsigned long long notrace sched_clock(void)
{
return ((get_clock_xt() - sched_clock_base_cc) * 125) >> 9;
}
@@ -95,12 +95,6 @@ void tod_to_timeval(__u64 todval, struct timespec *xtime)
xtime->tv_nsec = ((todval * 1000) >> 12);
}
-#ifdef CONFIG_PROFILING
-#define s390_do_profile() profile_tick(CPU_PROFILING)
-#else
-#define s390_do_profile() do { ; } while(0)
-#endif /* CONFIG_PROFILING */
-
void clock_comparator_work(void)
{
struct clock_event_device *cd;
@@ -109,7 +103,6 @@ void clock_comparator_work(void)
set_clock_comparator(S390_lowcore.clock_comparator);
cd = &__get_cpu_var(comparators);
cd->event_handler(cd);
- s390_do_profile();
}
/*
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 89b2e7f1b7a..45e1708b70f 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -22,7 +22,7 @@
#include <linux/elf.h>
#include <linux/security.h>
#include <linux/bootmem.h>
-
+#include <linux/compat.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
@@ -53,8 +53,19 @@ unsigned int __read_mostly vdso_enabled = 1;
static int __init vdso_setup(char *s)
{
- vdso_enabled = simple_strtoul(s, NULL, 0);
- return 1;
+ unsigned long val;
+ int rc;
+
+ rc = 0;
+ if (strncmp(s, "on", 3) == 0)
+ vdso_enabled = 1;
+ else if (strncmp(s, "off", 4) == 0)
+ vdso_enabled = 0;
+ else {
+ rc = strict_strtoul(s, 0, &val);
+ vdso_enabled = rc ? 0 : !!val;
+ }
+ return !rc;
}
__setup("vdso=", vdso_setup);
@@ -203,7 +214,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
vdso_pagelist = vdso64_pagelist;
vdso_pages = vdso64_pages;
#ifdef CONFIG_COMPAT
- if (test_thread_flag(TIF_31BIT)) {
+ if (is_compat_task()) {
vdso_pagelist = vdso32_pagelist;
vdso_pages = vdso32_pages;
}
diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
index 89399b8756c..a53db23ee09 100644
--- a/arch/s390/kernel/vmlinux.lds.S
+++ b/arch/s390/kernel/vmlinux.lds.S
@@ -34,6 +34,7 @@ SECTIONS
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
+ IRQENTRY_TEXT
*(.fixup)
*(.gnu.warning)
} :text = 0x0700
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index c87f59bd824..c8eb7255332 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -23,7 +23,7 @@
#include <asm/s390_ext.h>
#include <asm/timer.h>
#include <asm/irq_regs.h>
-#include <asm/cpu.h>
+#include <asm/cputime.h>
static ext_int_info_t ext_int_info_timer;
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 10bccd1f8ae..c18b21d6991 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -512,7 +512,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
BUG();
}
- might_sleep();
+ might_fault();
do {
__vcpu_run(vcpu);
diff --git a/arch/s390/lib/spinlock.c b/arch/s390/lib/spinlock.c
index e41f4008afc..f7e0d30250b 100644
--- a/arch/s390/lib/spinlock.c
+++ b/arch/s390/lib/spinlock.c
@@ -124,6 +124,27 @@ void _raw_read_lock_wait(raw_rwlock_t *rw)
}
EXPORT_SYMBOL(_raw_read_lock_wait);
+void _raw_read_lock_wait_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+ unsigned int old;
+ int count = spin_retry;
+
+ local_irq_restore(flags);
+ while (1) {
+ if (count-- <= 0) {
+ _raw_yield();
+ count = spin_retry;
+ }
+ if (!__raw_read_can_lock(rw))
+ continue;
+ old = rw->lock & 0x7fffffffU;
+ local_irq_disable();
+ if (_raw_compare_and_swap(&rw->lock, old, old + 1) == old)
+ return;
+ }
+}
+EXPORT_SYMBOL(_raw_read_lock_wait_flags);
+
int _raw_read_trylock_retry(raw_rwlock_t *rw)
{
unsigned int old;
@@ -157,6 +178,25 @@ void _raw_write_lock_wait(raw_rwlock_t *rw)
}
EXPORT_SYMBOL(_raw_write_lock_wait);
+void _raw_write_lock_wait_flags(raw_rwlock_t *rw, unsigned long flags)
+{
+ int count = spin_retry;
+
+ local_irq_restore(flags);
+ while (1) {
+ if (count-- <= 0) {
+ _raw_yield();
+ count = spin_retry;
+ }
+ if (!__raw_write_can_lock(rw))
+ continue;
+ local_irq_disable();
+ if (_raw_compare_and_swap(&rw->lock, 0, 0x80000000) == 0)
+ return;
+ }
+}
+EXPORT_SYMBOL(_raw_write_lock_wait_flags);
+
int _raw_write_trylock_retry(raw_rwlock_t *rw)
{
int count = spin_retry;
diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile
index 2a745813454..db05661ac89 100644
--- a/arch/s390/mm/Makefile
+++ b/arch/s390/mm/Makefile
@@ -2,7 +2,7 @@
# Makefile for the linux s390-specific parts of the memory manager.
#
-obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o
+obj-y := init.o fault.o extmem.o mmap.o vmem.o pgtable.o maccess.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_PAGE_STATES) += page-states.o
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 833e8366c35..220a152c836 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -19,6 +19,7 @@
#include <linux/ptrace.h>
#include <linux/mman.h>
#include <linux/mm.h>
+#include <linux/compat.h>
#include <linux/smp.h>
#include <linux/kdebug.h>
#include <linux/smp_lock.h>
@@ -239,7 +240,7 @@ static int signal_return(struct mm_struct *mm, struct pt_regs *regs,
up_read(&mm->mmap_sem);
clear_tsk_thread_flag(current, TIF_SINGLE_STEP);
#ifdef CONFIG_COMPAT
- compat = test_tsk_thread_flag(current, TIF_31BIT);
+ compat = is_compat_task();
if (compat && instruction == 0x0a77)
sys32_sigreturn();
else if (compat && instruction == 0x0aad)
diff --git a/arch/s390/mm/maccess.c b/arch/s390/mm/maccess.c
new file mode 100644
index 00000000000..81756271dc4
--- /dev/null
+++ b/arch/s390/mm/maccess.c
@@ -0,0 +1,61 @@
+/*
+ * Access kernel memory without faulting -- s390 specific implementation.
+ *
+ * Copyright IBM Corp. 2009
+ *
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
+ *
+ */
+
+#include <linux/uaccess.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/system.h>
+
+/*
+ * This function writes to kernel memory bypassing DAT and possible
+ * write protection. It copies one to four bytes from src to dst
+ * using the stura instruction.
+ * Returns the number of bytes copied or -EFAULT.
+ */
+static long probe_kernel_write_odd(void *dst, void *src, size_t size)
+{
+ unsigned long count, aligned;
+ int offset, mask;
+ int rc = -EFAULT;
+
+ aligned = (unsigned long) dst & ~3UL;
+ offset = (unsigned long) dst & 3;
+ count = min_t(unsigned long, 4 - offset, size);
+ mask = (0xf << (4 - count)) & 0xf;
+ mask >>= offset;
+ asm volatile(
+ " bras 1,0f\n"
+ " icm 0,0,0(%3)\n"
+ "0: l 0,0(%1)\n"
+ " lra %1,0(%1)\n"
+ "1: ex %2,0(1)\n"
+ "2: stura 0,%1\n"
+ " la %0,0\n"
+ "3:\n"
+ EX_TABLE(0b,3b) EX_TABLE(1b,3b) EX_TABLE(2b,3b)
+ : "+d" (rc), "+a" (aligned)
+ : "a" (mask), "a" (src) : "cc", "memory", "0", "1");
+ return rc ? rc : count;
+}
+
+long probe_kernel_write(void *dst, void *src, size_t size)
+{
+ long copied = 0;
+
+ while (size) {
+ copied = probe_kernel_write_odd(dst, src, size);
+ if (copied < 0)
+ break;
+ dst += copied;
+ src += copied;
+ size -= copied;
+ }
+ return copied < 0 ? -EFAULT : 0;
+}
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index e008d236cc1..f4558ccf02b 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -28,6 +28,7 @@
#include <linux/mm.h>
#include <linux/module.h>
#include <asm/pgalloc.h>
+#include <asm/compat.h>
/*
* Top of mmap area (just below the process stack).
@@ -55,7 +56,7 @@ static inline int mmap_is_legacy(void)
/*
* Force standard allocation for 64 bit programs.
*/
- if (!test_thread_flag(TIF_31BIT))
+ if (!is_compat_task())
return 1;
#endif
return sysctl_legacy_va_layout ||
@@ -91,7 +92,7 @@ EXPORT_SYMBOL_GPL(arch_pick_mmap_layout);
int s390_mmap_check(unsigned long addr, unsigned long len)
{
- if (!test_thread_flag(TIF_31BIT) &&
+ if (!is_compat_task() &&
len >= TASK_SIZE && TASK_SIZE < (1UL << 53))
return crst_table_upgrade(current->mm, 1UL << 53);
return 0;
@@ -108,8 +109,7 @@ s390_get_unmapped_area(struct file *filp, unsigned long addr,
area = arch_get_unmapped_area(filp, addr, len, pgoff, flags);
if (!(area & ~PAGE_MASK))
return area;
- if (area == -ENOMEM &&
- !test_thread_flag(TIF_31BIT) && TASK_SIZE < (1UL << 53)) {
+ if (area == -ENOMEM && !is_compat_task() && TASK_SIZE < (1UL << 53)) {
/* Upgrade the page table to 4 levels and retry. */
rc = crst_table_upgrade(mm, 1UL << 53);
if (rc)
@@ -131,8 +131,7 @@ s390_get_unmapped_area_topdown(struct file *filp, const unsigned long addr,
area = arch_get_unmapped_area_topdown(filp, addr, len, pgoff, flags);
if (!(area & ~PAGE_MASK))
return area;
- if (area == -ENOMEM &&
- !test_thread_flag(TIF_31BIT) && TASK_SIZE < (1UL << 53)) {
+ if (area == -ENOMEM && !is_compat_task() && TASK_SIZE < (1UL << 53)) {
/* Upgrade the page table to 4 levels and retry. */
rc = crst_table_upgrade(mm, 1UL << 53);
if (rc)
diff --git a/arch/s390/mm/pgtable.c b/arch/s390/mm/pgtable.c
index be6c1cf4ad5..4ca8e826bf3 100644
--- a/arch/s390/mm/pgtable.c
+++ b/arch/s390/mm/pgtable.c
@@ -1,7 +1,5 @@
/*
- * arch/s390/mm/pgtable.c
- *
- * Copyright IBM Corp. 2007
+ * Copyright IBM Corp. 2007,2009
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
@@ -53,6 +51,18 @@ void clear_table_pgstes(unsigned long *table)
#endif
+unsigned long VMALLOC_START = VMALLOC_END - VMALLOC_SIZE;
+EXPORT_SYMBOL(VMALLOC_START);
+
+static int __init parse_vmalloc(char *arg)
+{
+ if (!arg)
+ return -EINVAL;
+ VMALLOC_START = (VMALLOC_END - memparse(arg, &arg)) & PAGE_MASK;
+ return 0;
+}
+early_param("vmalloc", parse_vmalloc);
+
unsigned long *crst_table_alloc(struct mm_struct *mm, int noexec)
{
struct page *page = alloc_pages(GFP_KERNEL, ALLOC_ORDER);