linux-kernel - Re: [PATCH] KVM: x86/pmu: Apply event filter mechanism to emulated instructions

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Date:   Wed, 22 Feb 2023 11:28:16 -0800
From:   Sean Christopherson <seanjc@...gle.com>
To:     Like Xu <like.xu.linux@...il.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jinrong Liang <cloudliang@...cent.com>,
        Aaron Lewis <aaronlewis@...gle.com>
Subject: Re: [PATCH] KVM: x86/pmu: Apply event filter mechanism to emulated instructions

On Wed, Feb 22, 2023, Like Xu wrote:
> From: Like Xu <likexu@...cent.com>
> 
> The check_pmu_event_filter() prevents the perf_event from being created
> and stops the associated counters from increasing, the same check should
> also be applied to counter increases caused by emulated instructions.
> Otherwise this filter mechanism cannot be considered to be in effect.
> 
> Reported-by: Jinrong Liang <cloudliang@...cent.com>

Already posted by Aaron[*], but I don't think there's been a follow-up.  Aaron?

[*] https://lore.kernel.org/all/20221209194957.2774423-2-aaronlewis@google.com