On 3/24/2025 11:01 PM, Mingwei Zhang wrote:
> From: Dapeng Mi
>
> Check if rdpmc can be intercepted for mediated vPMU. Simply speaking,
> if guest own all PMU counters in mediated vPMU, then rdpmc interception
> should be disabled to mitigate the performance impact, otherwise rdpmc
> has to be in
On 5/15/2025 8:19 AM, Sean Christopherson wrote:
> The shortlog is wildly inaccurate. KVM is not simply checking, KVM is
> actively
> disabling RDPMC interception. *That* needs to be the focus of the shortlog
> and
> changelog.
Sure.
>
>> diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.
The shortlog is wildly inaccurate. KVM is not simply checking, KVM is actively
disabling RDPMC interception. *That* needs to be the focus of the shortlog and
changelog.
> diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
> index 92c742ead663..6ad71752be4b 100644
> --- a/arch/x86/kvm/pmu.c
> +
From: Dapeng Mi
Check if rdpmc can be intercepted for mediated vPMU. Simply speaking,
if guest own all PMU counters in mediated vPMU, then rdpmc interception
should be disabled to mitigate the performance impact, otherwise rdpmc
has to be intercepted to avoid guest obtain host counter's data via
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