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-rw-r--r--arch/s390/kernel/Makefile7
-rw-r--r--arch/s390/kernel/compat_linux.c3
-rw-r--r--arch/s390/kernel/compat_wrapper.S17
-rw-r--r--arch/s390/kernel/early.c10
-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.S67
-rw-r--r--arch/s390/kernel/init_task.c4
-rw-r--r--arch/s390/kernel/kprobes.c47
-rw-r--r--arch/s390/kernel/mcount.S212
-rw-r--r--arch/s390/kernel/mem_detect.c19
-rw-r--r--arch/s390/kernel/module.c2
-rw-r--r--arch/s390/kernel/nmi.c2
-rw-r--r--arch/s390/kernel/process.c6
-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.c69
-rw-r--r--arch/s390/kernel/syscalls.S2
-rw-r--r--arch/s390/kernel/time.c25
-rw-r--r--arch/s390/kernel/vdso.c19
-rw-r--r--arch/s390/kernel/vmlinux.lds.S1
-rw-r--r--arch/s390/kernel/vtime.c29
26 files changed, 994 insertions, 181 deletions
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_linux.c b/arch/s390/kernel/compat_linux.c
index 002c70d3cb7..9ab188d67a3 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -461,9 +461,6 @@ asmlinkage long sys32_execve(void)
result = rc;
goto out_putname;
}
- task_lock(current);
- current->ptrace &= ~PT_DTRACE;
- task_unlock(current);
current->thread.fp_regs.fpc=0;
asm volatile("sfpc %0,0" : : "d" (0));
result = regs->gprs[2];
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..f9b144049dc 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -1,7 +1,7 @@
/*
* arch/s390/kernel/early.c
*
- * Copyright IBM Corp. 2007
+ * Copyright IBM Corp. 2007, 2009
* Author(s): Hongjie Yang <hongjie@us.ibm.com>,
* Heiko Carstens <heiko.carstens@de.ibm.com>
*/
@@ -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>
@@ -209,7 +210,7 @@ static noinline __init void detect_machine_type(void)
machine_flags |= MACHINE_FLAG_VM;
}
-static __init void early_pgm_check_handler(void)
+static void early_pgm_check_handler(void)
{
unsigned long addr;
const struct exception_table_entry *fixup;
@@ -221,7 +222,7 @@ static __init void early_pgm_check_handler(void)
S390_lowcore.program_old_psw.addr = fixup->fixup | PSW_ADDR_AMODE;
}
-static noinline __init void setup_lowcore_early(void)
+void setup_lowcore_early(void)
{
psw_t psw;
@@ -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..3e298e64f0d
--- /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, 0) == -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..ec688234852 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>
@@ -64,7 +62,7 @@ __HEAD
.org 0x100
#
# subroutine for loading from tape
-# Paramters:
+# Parameters:
# R1 = device number
# R2 = load address
.Lloader:
@@ -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/init_task.c b/arch/s390/kernel/init_task.c
index 7db95c0b869..fe787f9e5f3 100644
--- a/arch/s390/kernel/init_task.c
+++ b/arch/s390/kernel/init_task.c
@@ -18,10 +18,6 @@
static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
-struct mm_struct init_mm = INIT_MM(init_mm);
-
-EXPORT_SYMBOL(init_mm);
-
/*
* Initial thread structure.
*
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index a01cf0284db..86783efa24e 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;
@@ -154,66 +154,35 @@ void __kprobes get_instruction_type(struct arch_specific_insn *ainsn)
static int __kprobes swap_instruction(void *aref)
{
+ struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
+ unsigned long status = kcb->kprobe_status;
struct ins_replace_args *args = aref;
- u32 *addr;
- u32 instr;
- int err = -EFAULT;
+ int rc;
- /*
- * 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;
+ kcb->kprobe_status = KPROBE_SWAP_INST;
+ rc = probe_kernel_write(args->ptr, &args->new, sizeof(args->new));
+ kcb->kprobe_status = status;
+ return rc;
}
void __kprobes arch_arm_kprobe(struct kprobe *p)
{
- struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
- unsigned long status = kcb->kprobe_status;
struct ins_replace_args args;
args.ptr = p->addr;
args.old = p->opcode;
args.new = BREAKPOINT_INSTRUCTION;
-
- kcb->kprobe_status = KPROBE_SWAP_INST;
stop_machine(swap_instruction, &args, NULL);
- kcb->kprobe_status = status;
}
void __kprobes arch_disarm_kprobe(struct kprobe *p)
{
- struct kprobe_ctlblk *kcb = get_kprobe_ctlblk();
- unsigned long status = kcb->kprobe_status;
struct ins_replace_args args;
args.ptr = p->addr;
args.old = BREAKPOINT_INSTRUCTION;
args.new = p->opcode;
-
- kcb->kprobe_status = KPROBE_SWAP_INST;
stop_machine(swap_instruction, &args, NULL);
- kcb->kprobe_status = status;
}
void __kprobes arch_remove_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/mem_detect.c b/arch/s390/kernel/mem_detect.c
index 9872999c66d..559af0d0787 100644
--- a/arch/s390/kernel/mem_detect.c
+++ b/arch/s390/kernel/mem_detect.c
@@ -1,6 +1,7 @@
/*
- * Copyright IBM Corp. 2008
- * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
+ * Copyright IBM Corp. 2008, 2009
+ *
+ * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#include <linux/kernel.h>
@@ -9,20 +10,6 @@
#include <asm/sclp.h>
#include <asm/setup.h>
-static inline int tprot(unsigned long addr)
-{
- int rc = -EFAULT;
-
- asm volatile(
- " tprot 0(%1),0\n"
- "0: ipm %0\n"
- " srl %0,28\n"
- "1:\n"
- EX_TABLE(0b,1b)
- : "+d" (rc) : "a" (addr) : "cc");
- return rc;
-}
-
#define ADDR2G (1ULL << 31)
static void find_memory_chunks(struct mem_chunk chunk[])
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index eed4a00cb67..ab2e3ed28ab 100644
--- a/arch/s390/kernel/module.c
+++ b/arch/s390/kernel/module.c
@@ -56,8 +56,6 @@ void *module_alloc(unsigned long size)
void module_free(struct module *mod, void *module_region)
{
vfree(module_region);
- /* FIXME: If module_region == mod->init_region, trim exception
- table entries. */
}
static void
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..5a43f27eec1 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);
@@ -265,9 +266,6 @@ SYSCALL_DEFINE0(vfork)
asmlinkage void execve_tail(void)
{
- task_lock(current);
- current->ptrace &= ~PT_DTRACE;
- task_unlock(current);
current->thread.fp_regs.fpc = 0;
if (MACHINE_HAS_IEEE)
asm volatile("sfpc %0,%0" : : "d" (0));
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..2270730f535 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -1,7 +1,7 @@
/*
* arch/s390/kernel/smp.c
*
- * Copyright IBM Corp. 1999,2007
+ * Copyright IBM Corp. 1999, 2009
* Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com),
* Martin Schwidefsky (schwidefsky@de.ibm.com)
* Heiko Carstens (heiko.carstens@de.ibm.com)
@@ -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)
@@ -855,13 +856,20 @@ static ssize_t show_idle_count(struct sys_device *dev,
{
struct s390_idle_data *idle;
unsigned long long idle_count;
+ unsigned int sequence;
idle = &per_cpu(s390_idle, dev->id);
- spin_lock(&idle->lock);
+repeat:
+ sequence = idle->sequence;
+ smp_rmb();
+ if (sequence & 1)
+ goto repeat;
idle_count = idle->idle_count;
if (idle->idle_enter)
idle_count++;
- spin_unlock(&idle->lock);
+ smp_rmb();
+ if (idle->sequence != sequence)
+ goto repeat;
return sprintf(buf, "%llu\n", idle_count);
}
static SYSDEV_ATTR(idle_count, 0444, show_idle_count, NULL);
@@ -871,15 +879,22 @@ static ssize_t show_idle_time(struct sys_device *dev,
{
struct s390_idle_data *idle;
unsigned long long now, idle_time, idle_enter;
+ unsigned int sequence;
idle = &per_cpu(s390_idle, dev->id);
- spin_lock(&idle->lock);
now = get_clock();
+repeat:
+ sequence = idle->sequence;
+ smp_rmb();
+ if (sequence & 1)
+ goto repeat;
idle_time = idle->idle_time;
idle_enter = idle->idle_enter;
if (idle_enter != 0ULL && idle_enter < now)
idle_time += now - idle_enter;
- spin_unlock(&idle->lock);
+ smp_rmb();
+ if (idle->sequence != sequence)
+ goto repeat;
return sprintf(buf, "%llu\n", idle_time >> 12);
}
static SYSDEV_ATTR(idle_time_us, 0444, show_idle_time, NULL);
@@ -907,11 +922,7 @@ static int __cpuinit smp_cpu_notify(struct notifier_block *self,
case CPU_ONLINE:
case CPU_ONLINE_FROZEN:
idle = &per_cpu(s390_idle, cpu);
- spin_lock_irq(&idle->lock);
- idle->idle_enter = 0;
- idle->idle_time = 0;
- idle->idle_count = 0;
- spin_unlock_irq(&idle->lock);
+ memset(idle, 0, sizeof(struct s390_idle_data));
if (sysfs_create_group(&s->kobj, &cpu_online_attr_group))
return NOTIFY_BAD;
break;
@@ -1030,6 +1041,42 @@ out:
static SYSDEV_CLASS_ATTR(dispatching, 0644, dispatching_show,
dispatching_store);
+/*
+ * If the resume kernel runs on another cpu than the suspended kernel,
+ * we have to switch the cpu IDs in the logical map.
+ */
+void smp_switch_boot_cpu_in_resume(u32 resume_phys_cpu_id,
+ struct _lowcore *suspend_lowcore)
+{
+ int cpu, suspend_cpu_id, resume_cpu_id;
+ u32 suspend_phys_cpu_id;
+
+ suspend_phys_cpu_id = __cpu_logical_map[suspend_lowcore->cpu_nr];
+ suspend_cpu_id = suspend_lowcore->cpu_nr;
+
+ for_each_present_cpu(cpu) {
+ if (__cpu_logical_map[cpu] == resume_phys_cpu_id) {
+ resume_cpu_id = cpu;
+ goto found;
+ }
+ }
+ panic("Could not find resume cpu in logical map.\n");
+
+found:
+ printk("Resume cpu ID: %i/%i\n", resume_phys_cpu_id, resume_cpu_id);
+ printk("Suspend cpu ID: %i/%i\n", suspend_phys_cpu_id, suspend_cpu_id);
+
+ __cpu_logical_map[resume_cpu_id] = suspend_phys_cpu_id;
+ __cpu_logical_map[suspend_cpu_id] = resume_phys_cpu_id;
+
+ lowcore_ptr[suspend_cpu_id]->cpu_addr = resume_phys_cpu_id;
+}
+
+u32 smp_get_phys_cpu_id(void)
+{
+ return __cpu_logical_map[smp_processor_id()];
+}
+
static int __init topology_init(void)
{
int cpu;
diff --git a/arch/s390/kernel/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..d4c8e9c47c8 100644
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -36,7 +36,6 @@
#include <linux/notifier.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
-#include <linux/bootmem.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
#include <asm/s390_ext.h>
@@ -62,15 +61,12 @@
u64 sched_clock_base_cc = -1; /* Force to data section. */
-static ext_int_info_t ext_int_info_cc;
-static ext_int_info_t ext_int_etr_cc;
-
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 +91,6 @@ 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 +99,6 @@ void clock_comparator_work(void)
set_clock_comparator(S390_lowcore.clock_comparator);
cd = &__get_cpu_var(comparators);
cd->event_handler(cd);
- s390_do_profile();
}
/*
@@ -262,15 +251,11 @@ void __init time_init(void)
stp_reset();
/* request the clock comparator external interrupt */
- if (register_early_external_interrupt(0x1004,
- clock_comparator_interrupt,
- &ext_int_info_cc) != 0)
+ if (register_external_interrupt(0x1004, clock_comparator_interrupt))
panic("Couldn't request external interrupt 0x1004");
/* request the timing alert external interrupt */
- if (register_early_external_interrupt(0x1406,
- timing_alert_interrupt,
- &ext_int_etr_cc) != 0)
+ if (register_external_interrupt(0x1406, timing_alert_interrupt))
panic("Couldn't request external interrupt 0x1406");
if (clocksource_register(&clocksource_tod) != 0)
@@ -1452,14 +1437,14 @@ static void __init stp_reset(void)
{
int rc;
- stp_page = alloc_bootmem_pages(PAGE_SIZE);
+ stp_page = (void *) get_zeroed_page(GFP_ATOMIC);
rc = chsc_sstpc(stp_page, STP_OP_CTRL, 0x0000);
if (rc == 0)
set_bit(CLOCK_SYNC_HAS_STP, &clock_sync_flags);
else if (stp_online) {
pr_warning("The real or virtual hardware system does "
"not provide an STP interface\n");
- free_bootmem((unsigned long) stp_page, PAGE_SIZE);
+ free_page((unsigned long) stp_page);
stp_page = NULL;
stp_online = 0;
}
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..c41bb0d416e 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -23,15 +23,11 @@
#include <asm/s390_ext.h>
#include <asm/timer.h>
#include <asm/irq_regs.h>
-#include <asm/cpu.h>
-
-static ext_int_info_t ext_int_info_timer;
+#include <asm/cputime.h>
static DEFINE_PER_CPU(struct vtimer_queue, virt_cpu_timer);
-DEFINE_PER_CPU(struct s390_idle_data, s390_idle) = {
- .lock = __SPIN_LOCK_UNLOCKED(s390_idle.lock)
-};
+DEFINE_PER_CPU(struct s390_idle_data, s390_idle);
static inline __u64 get_vtimer(void)
{
@@ -153,11 +149,13 @@ void vtime_start_cpu(void)
vq->elapsed -= vq->idle - S390_lowcore.async_enter_timer;
}
- spin_lock(&idle->lock);
+ idle->sequence++;
+ smp_wmb();
idle->idle_time += idle_time;
idle->idle_enter = 0ULL;
idle->idle_count++;
- spin_unlock(&idle->lock);
+ smp_wmb();
+ idle->sequence++;
}
void vtime_stop_cpu(void)
@@ -244,15 +242,23 @@ cputime64_t s390_get_idle_time(int cpu)
{
struct s390_idle_data *idle;
unsigned long long now, idle_time, idle_enter;
+ unsigned int sequence;
idle = &per_cpu(s390_idle, cpu);
- spin_lock(&idle->lock);
+
now = get_clock();
+repeat:
+ sequence = idle->sequence;
+ smp_rmb();
+ if (sequence & 1)
+ goto repeat;
idle_time = 0;
idle_enter = idle->idle_enter;
if (idle_enter != 0ULL && idle_enter < now)
idle_time = now - idle_enter;
- spin_unlock(&idle->lock);
+ smp_rmb();
+ if (idle->sequence != sequence)
+ goto repeat;
return idle_time;
}
@@ -557,8 +563,7 @@ void init_cpu_vtimer(void)
void __init vtime_init(void)
{
/* request the cpu timer external interrupt */
- if (register_early_external_interrupt(0x1005, do_cpu_timer_interrupt,
- &ext_int_info_timer) != 0)
+ if (register_external_interrupt(0x1005, do_cpu_timer_interrupt))
panic("Couldn't request external interrupt 0x1005");
/* Enable cpu timer interrupts on the boot cpu. */
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-12 17:56:35 +0000