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Date:   Wed, 23 Feb 2022 15:27:24 +0000
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Mark Brown <broonie@kernel.org>
Cc:     Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
        Shuah Khan <skhan@linuxfoundation.org>,
        Shuah Khan <shuah@kernel.org>,
        Alan Hayward <alan.hayward@arm.com>,
        Luis Machado <luis.machado@arm.com>,
        Salil Akerkar <Salil.Akerkar@arm.com>,
        Basant Kumar Dwivedi <Basant.KumarDwivedi@arm.com>,
        Szabolcs Nagy <szabolcs.nagy@arm.com>,
        James Morse <james.morse@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        linux-arm-kernel@lists.infradead.org,
        linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH v11 23/40] arm64/sme: Add ptrace support for ZA
Message-ID: <YhZSXEAXvPaHbxwb@arm.com>
References: <20220207152109.197566-1-broonie@kernel.org>
 <20220207152109.197566-24-broonie@kernel.org>
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On Mon, Feb 07, 2022 at 03:20:52PM +0000, Mark Brown wrote:
> The ZA array can be read and written with the NT_ARM_ZA.  Similarly to
> our interface for the SVE vector registers the regset consists of a
> header with information on the current vector length followed by an
> optional register data payload, represented as for signals as a series
> of horizontal vectors from 0 to VL/8 in the endianness independent
> format used for vectors.
> 
> On get if ZA is enabled then register data will be provided, otherwise
> it will be omitted.  On set if register data is provided then ZA is
> enabled and initialized using the provided data, otherwise it is
> disabled.
> 
> Signed-off-by: Mark Brown <broonie@kernel.org>

The patch looks fine to be but I'd like Luis to look at the ptrace ABI
in this series.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>