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Subject: Re: [PATCH 0/5] arm64: ARMv8.7-A: MTE: Add asymm mode support
To:     Will Deacon <will@kernel.org>
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        kasan-dev@googlegroups.com,
        Andrew Morton <akpm@linux-foundation.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Andrey Ryabinin <aryabinin@virtuozzo.com>,
        Alexander Potapenko <glider@google.com>,
        Marco Elver <elver@google.com>,
        Evgenii Stepanov <eugenis@google.com>,
        Branislav Rankov <Branislav.Rankov@arm.com>,
        Andrey Konovalov <andreyknvl@gmail.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
References: <20210913081424.48613-1-vincenzo.frascino@arm.com>
 <20210929154907.GC22029@willie-the-truck>
From:   Vincenzo Frascino <vincenzo.frascino@arm.com>
Message-ID: <90cb5600-44cb-1ed5-de4b-d19919090622@arm.com>
Date:   Mon, 4 Oct 2021 17:16:49 +0200
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Hi Will,

sorry for the late reply but I am on sabbatical :)

On 9/29/21 5:49 PM, Will Deacon wrote:
> I'm surprised not to see any update to:
> 
> 	Documentation/arm64/memory-tagging-extension.rst
> 
> particularly regarding the per-cpu preferred tag checking modes. Is
> asymmetric mode not supported there?
> 

The document that you are pointing out covers the userspace support, this series
introduces the in-kernel support only for asymmetric MTE. The userspace bits for
asymm will be added with a future series.

The confusion comes from the fact, as Peter correctly pointed already, that I
forgot to mention this vital info in the cover letter. Sorry about that I will
make sure that this is addressed in v2.

Thanks!

> Will

-- 
Regards,
Vincenzo