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

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Message-ID: <CAAAPnDEHj8mqRp3mx2grOjR2EbgicHO7OR0-XSguJ7TSix0Mjg@mail.gmail.com>
Date:   Wed, 22 Feb 2023 20:38:11 +0000
From:   Aaron Lewis <aaronlewis@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Like Xu <like.xu.linux@...il.com>,
        Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Jinrong Liang <cloudliang@...cent.com>
Subject: Re: [PATCH] KVM: x86/pmu: Apply event filter mechanism to emulated instructions

On Wed, Feb 22, 2023 at 7:28 PM Sean Christopherson <seanjc@...gle.com> wrote:
>
> 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

There hasn't been a follow-up yet.  I'll try to get one out in the
next week or so.