linux-kernel - [PATCH v9 04/17] perf/x86/intel: Fix the comment about guest LBR support on KVM

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Date:   Tue, 15 Feb 2022 16:25:31 -0500
From:   Yang Weijiang <weijiang.yang@...el.com>
To:     pbonzini@...hat.com, jmattson@...gle.com, seanjc@...gle.com,
        like.xu.linux@...il.com, vkuznets@...hat.com, wei.w.wang@...el.com,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Like Xu <like.xu@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Yang Weijiang <weijiang.yang@...el.com>
Subject: [PATCH v9 04/17] perf/x86/intel: Fix the comment about guest LBR support on KVM

From: Like Xu <like.xu@...ux.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.

Cc: Peter Zijlstra <peterz@...radead.org>
Reviewed-by: Kan Liang <kan.liang@...ux.intel.com>
Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Signed-off-by: Like Xu <like.xu@...ux.intel.com>
Signed-off-by: Yang Weijiang <weijiang.yang@...el.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 a3c7ca876aeb..f216431135bd 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -6353,8 +6353,7 @@ __init int intel_pmu_init(void)
 					  x86_pmu.intel_ctrl);
 	/*
 	 * 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_tos && !check_msr(x86_pmu.lbr_tos, 0x3UL))
-- 
2.27.0