From: Will Deacon <will@kernel.org>
To: Vincenzo Frascino <vincenzo.frascino@arm.com>
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>
Subject: Re: [PATCH v2 5/5] kasan: Extend KASAN mode kernel parameter
Date: Wed, 6 Oct 2021 11:58:31 +0100 [thread overview]
Message-ID: <20211006105831.GA30555@willie-the-truck> (raw)
In-Reply-To: <20211004202253.27857-6-vincenzo.frascino@arm.com>
On Mon, Oct 04, 2021 at 09:22:53PM +0100, Vincenzo Frascino wrote:
> Architectures supported by KASAN_HW_TAGS can provide an asymmetric mode
> of execution. On an MTE enabled arm64 hw for example this can be
> identified with the asymmetric tagging mode of execution. In particular,
> when such a mode is present, the CPU triggers a fault on a tag mismatch
> during a load operation and asynchronously updates a register when a tag
> mismatch is detected during a store operation.
>
> Extend the KASAN HW execution mode kernel command line parameter to
> support asymmetric mode.
>
> Cc: Dmitry Vyukov <dvyukov@google.com>
> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
> Cc: Alexander Potapenko <glider@google.com>
> Cc: Andrey Konovalov <andreyknvl@gmail.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
> ---
> Documentation/dev-tools/kasan.rst | 7 +++++--
> lib/test_kasan.c | 2 +-
> mm/kasan/hw_tags.c | 27 ++++++++++++++++++++++-----
> mm/kasan/kasan.h | 22 +++++++++++++++++++---
> mm/kasan/report.c | 2 +-
> 5 files changed, 48 insertions(+), 12 deletions(-)
I'll wait for an Ack from Andrey or Marco before queueing this.
Will
next prev parent reply other threads:[~2021-10-06 10:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-04 20:22 [PATCH v2 0/5] arm64: ARMv8.7-A: MTE: Add asymm in-kernel support Vincenzo Frascino
2021-10-04 20:22 ` [PATCH v2 1/5] kasan: Remove duplicate of kasan_flag_async Vincenzo Frascino
2021-10-04 20:22 ` [PATCH v2 2/5] arm64: mte: Bitfield definitions for Asymm MTE Vincenzo Frascino
2021-10-04 20:22 ` [PATCH v2 3/5] arm64: mte: CPU feature detection " Vincenzo Frascino
2021-10-04 20:22 ` [PATCH v2 4/5] arm64: mte: Add asymmetric mode support Vincenzo Frascino
2021-10-06 12:19 ` Andrey Konovalov
2021-10-06 14:21 ` Vincenzo Frascino
2021-10-04 20:22 ` [PATCH v2 5/5] kasan: Extend KASAN mode kernel parameter Vincenzo Frascino
2021-10-06 10:58 ` Will Deacon [this message]
2021-10-06 11:35 ` Marco Elver
2021-10-06 14:22 ` Vincenzo Frascino
2021-10-06 12:19 ` Andrey Konovalov
2021-10-06 14:25 ` Vincenzo Frascino
2021-10-05 22:25 ` [PATCH v2 0/5] arm64: ARMv8.7-A: MTE: Add asymm in-kernel support Andrew Morton
2021-10-06 8:05 ` Will Deacon
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