From: Like Xu <like.xu@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
Kan Liang <kan.liang@linux.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 v4 RESEND 1/5] perf/x86/intel: Fix the comment about guest LBR support on KVM
Date: Mon, 22 Mar 2021 14:06:31 +0800 [thread overview]
Message-ID: <20210322060635.821531-2-like.xu@linux.intel.com> (raw)
In-Reply-To: <20210322060635.821531-1-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:[~2021-03-22 6:15 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-22 6:06 [PATCH v4 RESEND 0/5] x86: The perf/x86 changes to support guest Arch LBR Like Xu
2021-03-22 6:06 ` Like Xu [this message]
2021-03-22 6:06 ` [PATCH v4 RESEND 2/5] perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers Like Xu
2021-03-23 21:38 ` Peter Zijlstra
2021-03-24 2:02 ` Like Xu
2021-03-22 6:06 ` [PATCH v4 RESEND 3/5] perf/x86/lbr: Move cpuc->lbr_xsave allocation out of sleeping region Like Xu
2021-03-23 20:56 ` Liang, Kan
2021-03-23 21:41 ` Peter Zijlstra
2021-03-23 23:03 ` Liang, Kan
2021-03-24 1:32 ` Namhyung Kim
2021-03-24 3:46 ` Like Xu
2021-03-24 4:04 ` Namhyung Kim
2021-03-24 5:42 ` Like Xu
2021-03-22 6:06 ` [PATCH v4 RESEND 4/5] perf/x86/lbr: Skip checking for the existence of LBR_TOS for Arch LBR Like Xu
2021-03-23 21:49 ` Peter Zijlstra
2021-03-24 3:32 ` Like Xu
2021-03-22 6:06 ` [PATCH v4 RESEND 5/5] perf/x86: Move ARCH_LBR_CTL_MASK definition to include/asm/msr-index.h Like Xu
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