linux-kernel - Re: [PATCH v2] arm64: Expose support for optional ARMv8-A features

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Message-ID: <20171011123705.GE11106@arm.com>
Date:   Wed, 11 Oct 2017 13:37:05 +0100
From:   Will Deacon <will.deacon@....com>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Suzuki K Poulose <suzuki.poulose@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org, Dave Martin <dave.martin@....com>
Subject: Re: [PATCH v2] arm64: Expose support for optional ARMv8-A features

On Tue, Oct 10, 2017 at 03:35:30PM +0100, Catalin Marinas wrote:
> On Tue, Oct 10, 2017 at 10:53:10AM +0100, Suzuki K. Poulose wrote:
> > diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/asm/hwcap.h
> > index 4b9344cba83a..a4bad90a3fa3 100644
> > --- a/arch/arm64/include/uapi/asm/hwcap.h
> > +++ b/arch/arm64/include/uapi/asm/hwcap.h
> > @@ -36,5 +36,10 @@
> >  #define HWCAP_FCMA		(1 << 14)
> >  #define HWCAP_LRCPC		(1 << 15)
> >  #define HWCAP_DCPOP		(1 << 16)
> > +#define HWCAP_SHA3		(1 << 17)
> > +#define HWCAP_SM3		(1 << 18)
> > +#define HWCAP_SM4		(1 << 19)
> > +#define HWCAP_ASIMDDP		(1 << 20)
> > +#define HWCAP_SHA512		(1 << 21)
> 
> We may be getting some conflicts around these with additional patches
> coming in but not hard to solve. Anyway, whether we are getting pointer
> authentication in or not (probably the latter), I would really like to
> get the first patch in that series merged:
> 
> http://lkml.kernel.org/r/1500480092-28480-2-git-send-email-mark.rutland@arm.com

Suzuki -- can you take Mark's patch above and update the documentation to
include the new hwcaps you've added, please?

Will