From: Like Xu <like.xu@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
Namhyung Kim <namhyung@kernel.org>
Cc: pbonzini@redhat.com, Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>,
Kan Liang <kan.liang@linux.intel.com>,
wei.w.wang@intel.com, x86@kernel.org,
linux-kernel@vger.kernel.org, Like Xu <like.xu@linux.intel.com>,
Andi Kleen <ak@linux.intel.com>
Subject: [PATCH v5 1/5] perf/x86/intel: Fix the comment about guest LBR support on KVM
Date: Fri, 26 Mar 2021 09:19:14 +0800 [thread overview]
Message-ID: <20210326011918.183685-2-like.xu@linux.intel.com> (raw)
In-Reply-To: <20210326011918.183685-1-like.xu@linux.intel.com>
Starting from v5.12, KVM reports guest LBR and extra_regs support
when the host has relevant support. Just delete this part of the
comment and fix a typo incidentally.
Signed-off-by: Like Xu <like.xu@linux.intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
---
arch/x86/events/intel/core.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 37ce38403cb8..382dd3994463 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5737,8 +5737,7 @@ __init int intel_pmu_init(void)
/*
* Access LBR MSR may cause #GP under certain circumstances.
- * E.g. KVM doesn't support LBR MSR
- * Check all LBT MSR here.
+ * Check all LBR MSR here.
* Disable LBR access if any LBR MSRs can not be accessed.
*/
if (x86_pmu.lbr_nr && !check_msr(x86_pmu.lbr_tos, 0x3UL))
--
2.29.2
next prev parent reply other threads:[~2021-03-26 1:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-26 1:19 [PATCH v5 0/5] perf/x86: Some minor changes to support guest Arch LBR Like Xu
2021-03-26 1:19 ` Like Xu [this message]
2021-03-26 1:19 ` [PATCH v5 2/5] perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers Like Xu
2021-03-26 1:19 ` [PATCH v5 3/5] perf/x86: Skip checking MSR for MSR 0x000 Like Xu
2021-03-26 1:19 ` [PATCH v5 4/5] perf/x86/lbr: Move cpuc->lbr_xsave allocation out of sleeping region Like Xu
2021-03-26 1:19 ` [PATCH v5 5/5] perf/x86: Move ARCH_LBR_CTL_MASK definition to include/asm/msr-index.h Like Xu
2021-04-06 3:20 ` [PATCH v5 0/5] perf/x86: Some minor changes to support guest Arch LBR Like Xu
2021-04-09 8:51 ` Like Xu
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