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Date: Mon, 6 Jul 2009 22:18:45 +1000
From: Anton Blanchard <anton@...ba.org>
To: mingo@...e.hu, a.p.zijlstra@...llo.nl, paulus@...ba.org,
benh@...nel.crashing.org
Cc: linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: [PATCH] powerpc/perf_counter: Add alignment-faults and
emulation-faults sw events
Hook up the alignment-faults and emulation-faults events for powerpc.
Signed-off-by: Anton Blanchard <anton@...ba.org>
---
Lots of duplication between PPC_WARN_EMULATED() and perf_swcounter_event()
here. Maybe we need to create PPC_WARN_ALIGNMENT(), use it and hide all
calls to perf_swcounter_event in the macros.
Index: linux.trees.git/arch/powerpc/kernel/align.c
===================================================================
--- linux.trees.git.orig/arch/powerpc/kernel/align.c 2009-07-06 21:50:53.000000000 +1000
+++ linux.trees.git/arch/powerpc/kernel/align.c 2009-07-06 22:10:41.000000000 +1000
@@ -25,6 +25,7 @@
#include <asm/cache.h>
#include <asm/cputable.h>
#include <asm/emulated_ops.h>
+#include <linux/perf_counter.h>
struct aligninfo {
unsigned char len;
@@ -707,6 +708,9 @@
*/
CHECK_FULL_REGS(regs);
+ perf_swcounter_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, 0, regs,
+ regs->nip);
+
dsisr = regs->dsisr;
/* Some processors don't provide us with a DSISR we can use here,
Index: linux.trees.git/arch/powerpc/kernel/traps.c
===================================================================
--- linux.trees.git.orig/arch/powerpc/kernel/traps.c 2009-07-06 21:50:53.000000000 +1000
+++ linux.trees.git/arch/powerpc/kernel/traps.c 2009-07-06 22:11:52.000000000 +1000
@@ -34,6 +34,7 @@
#include <linux/bug.h>
#include <linux/kdebug.h>
#include <linux/debugfs.h>
+#include <linux/perf_counter.h>
#include <asm/emulated_ops.h>
#include <asm/pgtable.h>
@@ -759,6 +760,8 @@
/* Emulate the mfspr rD, PVR. */
if ((instword & PPC_INST_MFSPR_PVR_MASK) == PPC_INST_MFSPR_PVR) {
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0,
+ regs, regs->nip);
PPC_WARN_EMULATED(mfpvr);
rd = (instword >> 21) & 0x1f;
regs->gpr[rd] = mfspr(SPRN_PVR);
@@ -767,6 +770,8 @@
/* Emulating the dcba insn is just a no-op. */
if ((instword & PPC_INST_DCBA_MASK) == PPC_INST_DCBA) {
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0,
+ regs, regs->nip);
PPC_WARN_EMULATED(dcba);
return 0;
}
@@ -776,6 +781,8 @@
int shift = (instword >> 21) & 0x1c;
unsigned long msk = 0xf0000000UL >> shift;
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0,
+ regs, regs->nip);
PPC_WARN_EMULATED(mcrxr);
regs->ccr = (regs->ccr & ~msk) | ((regs->xer >> shift) & msk);
regs->xer &= ~0xf0000000UL;
@@ -784,18 +791,24 @@
/* Emulate load/store string insn. */
if ((instword & PPC_INST_STRING_GEN_MASK) == PPC_INST_STRING) {
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0,
+ regs, regs->nip);
PPC_WARN_EMULATED(string);
return emulate_string_inst(regs, instword);
}
/* Emulate the popcntb (Population Count Bytes) instruction. */
if ((instword & PPC_INST_POPCNTB_MASK) == PPC_INST_POPCNTB) {
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0,
+ regs, regs->nip);
PPC_WARN_EMULATED(popcntb);
return emulate_popcntb_inst(regs, instword);
}
/* Emulate isel (Integer Select) instruction */
if ((instword & PPC_INST_ISEL_MASK) == PPC_INST_ISEL) {
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0,
+ regs, regs->nip);
PPC_WARN_EMULATED(isel);
return emulate_isel(regs, instword);
}
@@ -994,8 +1007,11 @@
#ifdef CONFIG_MATH_EMULATION
errcode = do_mathemu(regs);
- if (errcode >= 0)
+ if (errcode >= 0) {
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0,
+ regs, regs->nip);
PPC_WARN_EMULATED(math);
+ }
switch (errcode) {
case 0:
@@ -1017,8 +1033,11 @@
#elif defined(CONFIG_8XX_MINIMAL_FPEMU)
errcode = Soft_emulate_8xx(regs);
- if (errcode >= 0)
+ if (errcode >= 0) {
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0,
+ regs, regs->nip);
PPC_WARN_EMULATED(8xx);
+ }
switch (errcode) {
case 0:
@@ -1129,6 +1148,8 @@
flush_altivec_to_thread(current);
+ perf_swcounter_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, 0, regs,
+ regs->nip);
PPC_WARN_EMULATED(altivec);
err = emulate_altivec(regs);
if (err == 0) {
--
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