sh: wire up perf alignment and emulation faults.
This plugs in the alignment and emulation fault reporting for perf sw
events.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/include/asm/system_32.h b/arch/sh/include/asm/system_32.h
index 9bd2684..c941b27 100644
--- a/arch/sh/include/asm/system_32.h
+++ b/arch/sh/include/asm/system_32.h
@@ -212,7 +212,7 @@
}
int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
- struct mem_access *ma, int);
+ struct mem_access *ma, int, unsigned long address);
static inline void trigger_address_error(void)
{
diff --git a/arch/sh/kernel/io_trapped.c b/arch/sh/kernel/io_trapped.c
index 2947d2b..32c385e 100644
--- a/arch/sh/kernel/io_trapped.c
+++ b/arch/sh/kernel/io_trapped.c
@@ -291,7 +291,7 @@
}
tmp = handle_unaligned_access(instruction, regs,
- &trapped_io_access, 1);
+ &trapped_io_access, 1, address);
set_fs(oldfs);
return tmp == 0;
}
diff --git a/arch/sh/kernel/traps_32.c b/arch/sh/kernel/traps_32.c
index f561352..3484c2f 100644
--- a/arch/sh/kernel/traps_32.c
+++ b/arch/sh/kernel/traps_32.c
@@ -5,7 +5,7 @@
* SuperH version: Copyright (C) 1999 Niibe Yutaka
* Copyright (C) 2000 Philipp Rumpf
* Copyright (C) 2000 David Howells
- * Copyright (C) 2002 - 2007 Paul Mundt
+ * Copyright (C) 2002 - 2010 Paul Mundt
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
@@ -26,6 +26,7 @@
#include <linux/limits.h>
#include <linux/sysfs.h>
#include <linux/uaccess.h>
+#include <linux/perf_event.h>
#include <asm/system.h>
#include <asm/alignment.h>
#include <asm/fpu.h>
@@ -369,7 +370,8 @@
#define SH_PC_12BIT_OFFSET(instr) ((((signed short)(instr<<4))>>3) + 4)
int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
- struct mem_access *ma, int expected)
+ struct mem_access *ma, int expected,
+ unsigned long address)
{
u_int rm;
int ret, index;
@@ -383,9 +385,18 @@
index = (instruction>>8)&15; /* 0x0F00 */
rm = regs->regs[index];
- /* shout about fixups */
- if (!expected)
+ /*
+ * Log the unexpected fixups, and then pass them on to perf.
+ *
+ * We intentionally don't report the expected cases to perf as
+ * otherwise the trapped I/O case will skew the results too much
+ * to be useful.
+ */
+ if (!expected) {
unaligned_fixups_notify(current, instruction, regs);
+ perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, 0,
+ regs, address);
+ }
ret = -EFAULT;
switch (instruction&0xF000) {
@@ -574,7 +585,8 @@
set_fs(USER_DS);
tmp = handle_unaligned_access(instruction, regs,
- &user_mem_access, 0);
+ &user_mem_access, 0,
+ address);
set_fs(oldfs);
if (tmp == 0)
@@ -607,8 +619,8 @@
unaligned_fixups_notify(current, instruction, regs);
- handle_unaligned_access(instruction, regs,
- &user_mem_access, 0);
+ handle_unaligned_access(instruction, regs, &user_mem_access,
+ 0, address);
set_fs(oldfs);
}
}
diff --git a/arch/sh/kernel/traps_64.c b/arch/sh/kernel/traps_64.c
index fda6355..6713ca9 100644
--- a/arch/sh/kernel/traps_64.c
+++ b/arch/sh/kernel/traps_64.c
@@ -24,6 +24,7 @@
#include <linux/interrupt.h>
#include <linux/sysctl.h>
#include <linux/module.h>
+#include <linux/perf_event.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/io.h>
@@ -433,6 +434,8 @@
return error;
}
+ perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, 0, regs, address);
+
destreg = (opcode >> 4) & 0x3f;
if (user_mode(regs)) {
__u64 buffer;
@@ -509,6 +512,8 @@
return error;
}
+ perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, 0, regs, address);
+
srcreg = (opcode >> 4) & 0x3f;
if (user_mode(regs)) {
__u64 buffer;
@@ -583,6 +588,8 @@
return error;
}
+ perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0, regs, address);
+
destreg = (opcode >> 4) & 0x3f;
if (user_mode(regs)) {
__u64 buffer;
@@ -658,6 +665,8 @@
return error;
}
+ perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0, regs, address);
+
srcreg = (opcode >> 4) & 0x3f;
if (user_mode(regs)) {
__u64 buffer;
diff --git a/arch/sh/math-emu/math.c b/arch/sh/math-emu/math.c
index 1fcdb12..f76a509 100644
--- a/arch/sh/math-emu/math.c
+++ b/arch/sh/math-emu/math.c
@@ -12,6 +12,7 @@
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/signal.h>
+#include <linux/perf_event.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@@ -619,6 +620,8 @@
struct task_struct *tsk = current;
struct sh_fpu_soft_struct *fpu = &(tsk->thread.xstate->softfpu);
+ perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0, regs, 0);
+
if (!(task_thread_info(tsk)->status & TS_USEDFPU)) {
/* initialize once. */
fpu_init(fpu);