linux-kernel - Re: [PATCH v4 04/13] KVM: arm64: Capture VM's first run

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Message-ID: <CAJHc60zTDrwM_cEBKACQjqxceKbCV65mMM83xgPa0xvxMtZo=Q@mail.gmail.com>
Date:   Mon, 14 Mar 2022 16:12:19 -0700
From:   Raghavendra Rao Ananta <rananta@...gle.com>
To:     Oliver Upton <oupton@...gle.com>
Cc:     Marc Zyngier <maz@...nel.org>, Andrew Jones <drjones@...hat.com>,
        James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Peter Shier <pshier@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>,
        Reiji Watanabe <reijiw@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v4 04/13] KVM: arm64: Capture VM's first run

On Mon, Mar 14, 2022 at 11:02 AM Oliver Upton <oupton@...gle.com> wrote:
Hi Oliver,
>
> Hi Raghavendra,
>
> On Thu, Feb 24, 2022 at 05:25:50PM +0000, Raghavendra Rao Ananta wrote:
> > Capture the first run of the KVM VM, which is basically the
> > first KVM_RUN issued for any vCPU. This state of the VM is
> > helpful in the upcoming patches to prevent user-space from
> > configuring certain VM features, such as the feature bitmap
> > exposed by the psuedo-firmware registers, after the VM has
> > started running.
> >
> > Signed-off-by: Raghavendra Rao Ananta <rananta@...gle.com>
>
> I believe this patch is superseded by commit:
>
>   5177fe91e4cf ("KVM: arm64: Do not change the PMU event filter after a VCPU has run")
>
> on kvmarm/next.
>
Perfect! Just what we needed. I'll drop this patch.

Regards,
Raghavendra
>
> --
> Thanks,
> Oliver