linux-kernel - Re: [PATCH v8 13/13] KVM: selftests: aarch64: vPMU test for immutability

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Message-ID: <ZTeeR7xHmMELgVGZ@linux.dev>
Date:   Tue, 24 Oct 2023 10:36:55 +0000
From:   Oliver Upton <oliver.upton@...ux.dev>
To:     Raghavendra Rao Ananta <rananta@...gle.com>
Cc:     Marc Zyngier <maz@...nel.org>,
        Alexandru Elisei <alexandru.elisei@....com>,
        James Morse <james.morse@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Shaoqin Huang <shahuang@...hat.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Reiji Watanabe <reijiw@...gle.com>,
        Colton Lewis <coltonlewis@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH v8 13/13] KVM: selftests: aarch64: vPMU test for
 immutability

On Fri, Oct 20, 2023 at 09:40:53PM +0000, Raghavendra Rao Ananta wrote:
> KVM marks some of the vPMU registers as immutable to
> userspace once the vCPU has started running. Add a test
> scenario to check this behavior.
> 
> Signed-off-by: Raghavendra Rao Ananta <rananta@...gle.com>

Now that PMCR_EL0.N is the only thing that's getting the immutability
treatment this patch fails. I'll probably drop it.

-- 
Thanks,
Oliver