linux-kernel - Re: [RFC PATCH 13/27] KVM: arm64: Enable access to sanitized CPU features at EL2

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Message-ID: <20201123135151.GA490744@google.com>
Date:   Mon, 23 Nov 2020 13:51:51 +0000
From:   Quentin Perret <qperret@...gle.com>
To:     Fuad Tabba <tabba@...gle.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        "moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)" 
        <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)" 
        <kvmarm@...ts.cs.columbia.edu>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE" 
        <devicetree@...r.kernel.org>, kernel-team@...roid.com,
        Android KVM <android-kvm@...gle.com>
Subject: Re: [RFC PATCH 13/27] KVM: arm64: Enable access to sanitized CPU
 features at EL2

On Monday 23 Nov 2020 at 10:55:20 (+0000), Fuad Tabba wrote:
> > diff --git a/arch/arm64/include/asm/kvm_cpufeature.h b/arch/arm64/include/asm/kvm_cpufeature.h
> > new file mode 100644
> > index 000000000000..d34f85cba358
> > --- /dev/null
> > +++ b/arch/arm64/include/asm/kvm_cpufeature.h
> > @@ -0,0 +1,17 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only */
> > +/*
> > + * Copyright (C) 2020 - Google LLC
> > + * Author: Quentin Perret <qperret@...gle.com>
> > + */
> 
> Missing include guard.

Right, but on purpose :)

See how arm.c includes this header twice with different definitions of
KVM_HYP_CPU_FTR_REG for instance.

Thanks,
Quentin