From: Stephane Eranian <eranian@google.com>
To: linux-kernel@vger.kernel.org
Cc: acme@redhat.com, peterz@infradead.org, mingo@elte.hu,
ak@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org,
kan.liang@intel.com, dsahern@gmail.com
Subject: [PATCH v1 2/3] perf/x86: add support for PERF_SAMPLE_BRANCH_IND_JUMP
Date: Thu, 14 May 2015 23:09:59 +0200 [thread overview]
Message-ID: <1431637800-31061-3-git-send-email-eranian@google.com> (raw)
In-Reply-To: <1431637800-31061-1-git-send-email-eranian@google.com>
This patch enables support for branch sampling filter
for indirect jumps (IND_JUMP). It enables LBR IND_JMP
filtering where available. There is also software filtering
support.
Signed-off-by: Stephane Eranian <eranian@google.com>
---
arch/x86/kernel/cpu/perf_event_intel_lbr.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index 94e5b50..201e16f 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -96,6 +96,7 @@ enum {
X86_BR_NO_TX = 1 << 14,/* not in transaction */
X86_BR_ZERO_CALL = 1 << 15,/* zero length call */
X86_BR_CALL_STACK = 1 << 16,/* call stack */
+ X86_BR_IND_JMP = 1 << 17,/* indirect jump */
};
#define X86_BR_PLM (X86_BR_USER | X86_BR_KERNEL)
@@ -113,6 +114,7 @@ enum {
X86_BR_IRQ |\
X86_BR_ABORT |\
X86_BR_IND_CALL |\
+ X86_BR_IND_JMP |\
X86_BR_ZERO_CALL)
#define X86_BR_ALL (X86_BR_PLM | X86_BR_ANY)
@@ -523,6 +525,9 @@ static int intel_pmu_setup_sw_lbr_filter(struct perf_event *event)
X86_BR_CALL_STACK;
}
+ if (br_type & PERF_SAMPLE_BRANCH_IND_JUMP)
+ mask |= X86_BR_IND_JMP;
+
/*
* stash actual user request into reg, it may
* be used by fixup code for some CPU
@@ -736,7 +741,7 @@ static int branch_type(unsigned long from, unsigned long to, int abort)
break;
case 4:
case 5:
- ret = X86_BR_JMP;
+ ret = X86_BR_IND_JMP;
break;
}
break;
@@ -844,6 +849,7 @@ static const int nhm_lbr_sel_map[PERF_SAMPLE_BRANCH_MAX_SHIFT] = {
*/
[PERF_SAMPLE_BRANCH_IND_CALL_SHIFT] = LBR_IND_CALL | LBR_IND_JMP,
[PERF_SAMPLE_BRANCH_COND_SHIFT] = LBR_JCC,
+ [PERF_SAMPLE_BRANCH_IND_JUMP_SHIFT] = LBR_IND_JMP,
};
static const int snb_lbr_sel_map[PERF_SAMPLE_BRANCH_MAX_SHIFT] = {
@@ -856,6 +862,7 @@ static const int snb_lbr_sel_map[PERF_SAMPLE_BRANCH_MAX_SHIFT] = {
| LBR_FAR,
[PERF_SAMPLE_BRANCH_IND_CALL_SHIFT] = LBR_IND_CALL,
[PERF_SAMPLE_BRANCH_COND_SHIFT] = LBR_JCC,
+ [PERF_SAMPLE_BRANCH_IND_JUMP_SHIFT] = LBR_IND_JMP,
};
static const int hsw_lbr_sel_map[PERF_SAMPLE_BRANCH_MAX_SHIFT] = {
@@ -870,6 +877,7 @@ static const int hsw_lbr_sel_map[PERF_SAMPLE_BRANCH_MAX_SHIFT] = {
[PERF_SAMPLE_BRANCH_COND_SHIFT] = LBR_JCC,
[PERF_SAMPLE_BRANCH_CALL_STACK_SHIFT] = LBR_REL_CALL | LBR_IND_CALL
| LBR_RETURN | LBR_CALL_STACK,
+ [PERF_SAMPLE_BRANCH_IND_JUMP_SHIFT] = LBR_IND_JMP,
};
/* core */
--
1.9.1
next prev parent reply other threads:[~2015-05-14 21:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-14 21:09 [PATCH v1 0/3] perf: add indirect jump filtering support Stephane Eranian
2015-05-14 21:09 ` [PATCH v1 1/3] perf: add new PERF_SAMPLE_BRANCH_IND_JUMP branch sample type Stephane Eranian
2015-06-07 17:48 ` [tip:perf/core] " tip-bot for Stephane Eranian
2015-05-14 21:09 ` Stephane Eranian [this message]
2015-06-07 17:48 ` [tip:perf/core] perf/x86/intel: add support for PERF_SAMPLE_BRANCH_IND_JUMP tip-bot for Stephane Eranian
2015-05-14 21:10 ` [PATCH v1 3/3] perf record: add support for sampling indirect jumps Stephane Eranian
2015-06-07 17:48 ` [tip:perf/core] perf record: Add " tip-bot for Stephane Eranian
2015-05-14 23:04 ` [PATCH v1 0/3] perf: add indirect jump filtering support Andi Kleen
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