From: Andi Kleen <andi@firstfloor.org>
To: a.p.zijlstra@chello.nl
Cc: x86@kernel.org, linux-kernel@vger.kernel.org, acme@redhat.com,
eranian@google.com, Andi Kleen <ak@linux.intel.com>
Subject: [PATCH 09/34] perf, x86: Disable LBR recording for unknown LBR_FMT
Date: Thu, 18 Oct 2012 16:19:17 -0700 [thread overview]
Message-ID: <1350602382-12771-10-git-send-email-andi@firstfloor.org> (raw)
In-Reply-To: <1350602382-12771-1-git-send-email-andi@firstfloor.org>
From: Andi Kleen <ak@linux.intel.com>
When the LBR format is unknown disable LBR recording. This prevents
crashes when the LBR address is misdecoded and mis-sign extended.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/kernel/cpu/perf_event_intel_lbr.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
index 2af6695b..ad5af13 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
@@ -13,6 +13,7 @@ enum {
LBR_FORMAT_EIP = 0x02,
LBR_FORMAT_EIP_FLAGS = 0x03,
LBR_FORMAT_EIP_FLAGS2 = 0x04,
+ LBR_FORMAT_MAX_KNOWN = LBR_FORMAT_EIP_FLAGS2,
};
/*
@@ -392,7 +393,7 @@ int intel_pmu_setup_lbr_filter(struct perf_event *event)
/*
* no LBR on this PMU
*/
- if (!x86_pmu.lbr_nr)
+ if (!x86_pmu.lbr_nr || x86_pmu.intel_cap.lbr_format > LBR_FORMAT_MAX_KNOWN)
return -EOPNOTSUPP;
/*
--
1.7.7.6
next prev parent reply other threads:[~2012-10-18 23:22 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-18 23:19 perf PMU support for Haswell v3 Andi Kleen
2012-10-18 23:19 ` [PATCH 01/34] perf, x86: Add PEBSv2 record support Andi Kleen
2012-10-18 23:19 ` [PATCH 02/34] perf, x86: Basic Haswell PMU support v2 Andi Kleen
2012-10-18 23:19 ` [PATCH 03/34] perf, x86: Basic Haswell PEBS " Andi Kleen
2012-10-23 12:01 ` Peter Zijlstra
2012-10-23 13:31 ` Andi Kleen
2012-10-18 23:19 ` [PATCH 04/34] perf, x86: Support the TSX intx/intx_cp qualifiers Andi Kleen
2012-10-23 12:09 ` Peter Zijlstra
2012-10-23 13:33 ` Andi Kleen
2012-10-18 23:19 ` [PATCH 05/34] perf, x86: Report PEBS event in a raw format Andi Kleen
2012-10-23 12:31 ` Peter Zijlstra
2012-10-23 12:39 ` Stephane Eranian
2012-10-23 13:45 ` Andi Kleen
2012-10-23 13:58 ` Stephane Eranian
2012-10-23 14:11 ` Andi Kleen
2012-10-23 13:30 ` Andi Kleen
2012-10-23 13:50 ` Peter Zijlstra
2012-10-23 13:57 ` Andi Kleen
2012-10-24 7:50 ` Ingo Molnar
2012-10-18 23:19 ` [PATCH 06/34] perf, kvm: Support the intx/intx_cp modifiers in KVM arch perfmon emulation v2 Andi Kleen
2012-10-23 12:36 ` Peter Zijlstra
2012-10-23 12:53 ` Gleb Natapov
2012-10-23 13:35 ` Andi Kleen
2012-10-23 13:36 ` Andi Kleen
2012-10-23 13:05 ` [06/34] " Gleb Natapov
2012-10-23 13:20 ` Andi Kleen
2012-10-24 13:37 ` Gleb Natapov
2012-10-18 23:19 ` [PATCH 07/34] perf, x86: Support PERF_SAMPLE_ADDR on Haswell Andi Kleen
2012-10-18 23:19 ` [PATCH 08/34] perf, x86: Support Haswell v4 LBR format Andi Kleen
2012-10-23 12:37 ` Peter Zijlstra
2012-10-18 23:19 ` Andi Kleen [this message]
2012-10-18 23:19 ` [PATCH 10/34] perf, x86: Support LBR filtering by INTX/NOTX/ABORT Andi Kleen
2012-10-18 23:19 ` [PATCH 11/34] perf, tools: Add abort,notx,intx branch filter options to perf report -j Andi Kleen
2012-10-23 12:44 ` Peter Zijlstra
2012-10-18 23:19 ` [PATCH 12/34] perf, tools: Support sorting by intx, abort branch flags Andi Kleen
2012-10-18 23:19 ` [PATCH 13/34] perf, x86: Support full width counting on Haswell Andi Kleen
2012-10-18 23:19 ` [PATCH 14/34] perf, x86: Avoid checkpointed counters causing excessive TSX aborts Andi Kleen
2012-10-23 13:03 ` Peter Zijlstra
2012-10-23 13:22 ` Andi Kleen
2012-10-23 13:05 ` Peter Zijlstra
2012-10-18 23:19 ` [PATCH 15/34] perf, core: Add a concept of a weightened sample Andi Kleen
2012-10-23 13:13 ` Peter Zijlstra
2012-10-23 13:19 ` Andi Kleen
2012-10-18 23:19 ` [PATCH 16/34] perf, x86: Support weight samples for PEBS Andi Kleen
2012-10-23 13:15 ` Peter Zijlstra
2012-10-23 14:05 ` Andi Kleen
2012-10-18 23:19 ` [PATCH 17/34] perf, tools: Add support for weight v2 Andi Kleen
2012-10-18 23:19 ` [PATCH 18/34] perf, tools: Handle XBEGIN like a jump Andi Kleen
2012-10-18 23:19 ` [PATCH 19/34] perf, x86: Support for printing PMU state on spurious PMIs v2 Andi Kleen
2012-10-18 23:19 ` [PATCH 20/34] perf, core: Add generic transaction flags Andi Kleen
2012-10-18 23:19 ` [PATCH 21/34] perf, x86: Add Haswell specific transaction flag reporting Andi Kleen
2012-10-18 23:19 ` [PATCH 22/34] perf, tools: Add support for record transaction flags Andi Kleen
2012-10-18 23:19 ` [PATCH 23/34] perf, tools: Point --sort documentation to --help Andi Kleen
2012-10-18 23:19 ` [PATCH 24/34] perf, tools: Add browser support for transaction flags Andi Kleen
2012-10-18 23:19 ` [PATCH 25/34] perf, tools: Move parse_events error printing to parse_events_options Andi Kleen
2012-10-18 23:19 ` [PATCH 26/34] perf, tools: Support events with - in the name Andi Kleen
2012-10-18 23:19 ` [PATCH 27/34] perf, x86: Report the arch perfmon events in sysfs Andi Kleen
2012-10-18 23:19 ` [PATCH 28/34] tools, perf: Add a precise event qualifier Andi Kleen
2012-10-18 23:19 ` [PATCH 29/34] perf, x86: Add Haswell TSX event aliases Andi Kleen
2012-10-18 23:19 ` [PATCH 30/34] perf, tools: Add perf stat --transaction v2 Andi Kleen
2012-10-18 23:19 ` [PATCH 31/34] perf, x86: Add a Haswell precise instructions event Andi Kleen
2012-10-18 23:19 ` [PATCH 32/34] perf, tools: Support generic events as pmu event names v2 Andi Kleen
2012-10-18 23:19 ` [PATCH 33/34] perf, tools: Default to cpu// for events v2 Andi Kleen
2012-10-18 23:19 ` [PATCH 34/34] perf, tools: List kernel supplied event aliases in perf list v2 Andi Kleen
2012-10-19 9:13 ` perf PMU support for Haswell v3 Andi Kleen
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