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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


  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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