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Date:   Thu, 5 Nov 2020 16:57:25 +0000
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Andrey Konovalov <andreyknvl@google.com>
Cc:     Will Deacon <will.deacon@arm.com>,
        Vincenzo Frascino <vincenzo.frascino@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>,
        Kevin Brodsky <kevin.brodsky@arm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v8 29/43] arm64: mte: Add in-kernel tag fault handler
Message-ID: <20201105165724.GD30030@gaia>
References: <cover.1604531793.git.andreyknvl@google.com>
 <a540ab7b9e3b908e0f4cd94c963a0cc6bb4e7d3f.1604531793.git.andreyknvl@google.com>
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On Thu, Nov 05, 2020 at 12:18:44AM +0100, Andrey Konovalov wrote:
> From: Vincenzo Frascino <vincenzo.frascino@arm.com>
> 
> Add the implementation of the in-kernel fault handler.
> 
> When a tag fault happens on a kernel address:
> * MTE is disabled on the current CPU,
> * the execution continues.
> 
> When a tag fault happens on a user address:
> * the kernel executes do_bad_area() and panics.
> 
> The tag fault handler for kernel addresses is currently empty and will be
> filled in by a future commit.
> 
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Co-developed-by: Andrey Konovalov <andreyknvl@google.com>
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>

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