linux-kernel - Re: [PATCH v4 02/18] KVM: arm64: selftests: Add sysreg.h

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Date:   Thu, 9 Sep 2021 13:06:31 -0700
From:   Raghavendra Rao Ananta <rananta@...gle.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, 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>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Peter Shier <pshier@...gle.com>,
        Ricardo Koller <ricarkol@...gle.com>,
        Oliver Upton <oupton@...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 02/18] KVM: arm64: selftests: Add sysreg.h

On Thu, Sep 9, 2021 at 10:18 AM Mark Brown <broonie@...nel.org> wrote:
>
> On Thu, Sep 09, 2021 at 01:38:02AM +0000, Raghavendra Rao Ananta wrote:
> > Bring-in the kernel's arch/arm64/include/asm/sysreg.h
> > into selftests to make use of all the standard
> > register definitions in consistence with the kernel.
>
> > Signed-off-by: Raghavendra Rao Ananta <rananta@...gle.com>
> > ---
> >  .../selftests/kvm/include/aarch64/sysreg.h    | 1278 +++++++++++++++++
> >  1 file changed, 1278 insertions(+)
> >  create mode 100644 tools/testing/selftests/kvm/include/aarch64/sysreg.h
>
> Can we arrange to copy this at build time rather than having a duplicate
> copy we need to keep in sync?  We have some stuff to do this for uapi
> headers already.

That's a great idea actually (I wasn't aware of it). But, probably
should've mentioned it earlier, I had a hard time compiling the header
as is so I modified it a little bit and made the definitions of
[write|read]_sysreg_s() similar to the ones in kvm-unit-tests.
I'll try my best to get the original format working and try to
implement your idea if it works.

Regards,
Raghavendra