[v3,1/9] perf/x86/intel: Fix a comment about guest LBR support
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Message ID 20210303135756.1546253-2-like.xu@linux.intel.com
State New, archived
Headers show
Series
  • KVM: x86/pmu: Guest Architectural LBR Enabling
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Commit Message

Like Xu March 3, 2021, 1:57 p.m. UTC
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(-)

Comments

Sean Christopherson March 3, 2021, 4:49 p.m. UTC | #1
On Wed, Mar 03, 2021, Like Xu wrote:
> 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.

Just delete this part of the comment.

>  	 * Check all LBT MSR here.
>  	 * Disable LBR access if any LBR MSRs can not be accessed.
>  	 */
> -- 
> 2.29.2
>

Patch
diff mbox series

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.
 	 */