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Subject: Re: [PATCH v3 3/4] arm64: mte: Enable async tag check fault
From:   Vincenzo Frascino <vincenzo.frascino@arm.com>
To:     Catalin Marinas <catalin.marinas@arm.com>
Cc:     linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        kasan-dev@googlegroups.com, Will Deacon <will@kernel.org>,
        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@google.com>
References: <20210115120043.50023-1-vincenzo.frascino@arm.com>
 <20210115120043.50023-4-vincenzo.frascino@arm.com>
 <20210118125715.GA4483@gaia> <c076b1cc-8ce5-91a0-9957-7dcd78026b18@arm.com>
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Date:   Mon, 18 Jan 2021 15:40:55 +0000
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On 1/18/21 1:37 PM, Vincenzo Frascino wrote:
>> If a speculated load is allowed to update this reg, we'd probably need an
>> ISB+DSB (I don't think it does, something to check with the architects).
>>
> I will check this with the architects and let you know.

I spoke to the architects and no speculative load can update TFSR_EL1.

-- 
Regards,
Vincenzo