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Date: Tue, 19 Jan 2021 12:57:33 +0000 From: Catalin Marinas <catalin.marinas@....com> To: Vincenzo Frascino <vincenzo.frascino@....com> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, kasan-dev@...glegroups.com, Will Deacon <will@...nel.org>, Dmitry Vyukov <dvyukov@...gle.com>, Andrey Ryabinin <aryabinin@...tuozzo.com>, Alexander Potapenko <glider@...gle.com>, Marco Elver <elver@...gle.com>, Evgenii Stepanov <eugenis@...gle.com>, Branislav Rankov <Branislav.Rankov@....com>, Andrey Konovalov <andreyknvl@...gle.com> Subject: Re: [PATCH v4 1/5] arm64: mte: Add asynchronous mode support On Mon, Jan 18, 2021 at 06:30:29PM +0000, Vincenzo Frascino wrote: > MTE provides an asynchronous mode for detecting tag exceptions. In > particular instead of triggering a fault the arm64 core updates a > register which is checked by the kernel after the asynchronous tag > check fault has occurred. > > Add support for MTE asynchronous mode. > > The exception handling mechanism will be added with a future patch. > > Note: KASAN HW activates async mode via kasan.mode kernel parameter. > The default mode is set to synchronous. > The code that verifies the status of TFSR_EL1 will be added with a > future patch. > > Cc: Catalin Marinas <catalin.marinas@....com> > Cc: Will Deacon <will@...nel.org> > Signed-off-by: Vincenzo Frascino <vincenzo.frascino@....com> Reviewed-by: Catalin Marinas <catalin.marinas@....com>
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