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From:   Like Xu <like.xu@linux.intel.com>
To:     Peter Zijlstra <peterz@infradead.org>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <seanjc@google.com>
Cc:     Vitaly Kuznetsov <vkuznets@redhat.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>,
        Kan Liang <kan.liang@linux.intel.com>,
        Dave Hansen <dave.hansen@intel.com>, wei.w.wang@intel.com,
        Borislav Petkov <bp@alien8.de>, kvm@vger.kernel.org,
        x86@kernel.org, linux-kernel@vger.kernel.org,
        Like Xu <like.xu@linux.intel.com>
Subject: [PATCH v3 1/9] perf/x86/intel: Fix a comment about guest LBR support
Date:   Wed,  3 Mar 2021 21:57:47 +0800
Message-Id: <20210303135756.1546253-2-like.xu@linux.intel.com>
In-Reply-To: <20210303135756.1546253-1-like.xu@linux.intel.com>
References: <20210303135756.1546253-1-like.xu@linux.intel.com>
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Starting from v5.12, KVM reports guest LBR and extra_regs
support when the host has relevant support.

Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Like Xu <like.xu@linux.intel.com>
---
 arch/x86/events/intel/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index d4569bfa83e3..a32acc7733a7 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -5565,7 +5565,7 @@ __init int intel_pmu_init(void)
 
 	/*
 	 * Access LBR MSR may cause #GP under certain circumstances.
-	 * E.g. KVM doesn't support LBR MSR
+	 * E.g. KVM doesn't support LBR MSR before v5.12.
 	 * Check all LBT MSR here.
 	 * Disable LBR access if any LBR MSRs can not be accessed.
 	 */
-- 
2.29.2