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imf04.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none); spf=pass (imf04.hostedemail.com: domain of cmarinas@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=cmarinas@kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1755279976; a=rsa-sha256; cv=none; b=D/DPRJJSFcoKxM5a/WFK2rFG70Z94xjn648cCDTbNBL9rx1raOeV0REJOyhiIlBtzQ8rQE wqgjqo0rjyGYdW53+w+XHkwM4b31L/CIlZmLLAfebfpncgceHNPaZzxKBQiRj2hjTdJwC8 O3apOMjWeB5XbrSvOXQReor2r+k8zu4= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id E047F613EE; Fri, 15 Aug 2025 17:46:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 302C4C4CEEB; Fri, 15 Aug 2025 17:46:11 +0000 (UTC) Date: Fri, 15 Aug 2025 18:46:09 +0100 From: Catalin Marinas To: Yeoreum Yun Cc: ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, corbet@lwn.net, will@kernel.org, akpm@linux-foundation.org, scott@os.amperecomputing.com, jhubbard@nvidia.com, pankaj.gupta@amd.com, leitao@debian.org, kaleshsingh@google.com, maz@kernel.org, broonie@kernel.org, oliver.upton@linux.dev, james.morse@arm.com, ardb@kernel.org, hardevsinh.palaniya@siliconsignals.io, david@redhat.com, yang@os.amperecomputing.com, kasan-dev@googlegroups.com, workflows@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org Subject: Re: [PATCH v2 1/2] kasan/hw-tags: introduce kasan.store_only option Message-ID: References: <20250813175335.3980268-1-yeoreum.yun@arm.com> <20250813175335.3980268-2-yeoreum.yun@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 9C46B40003 X-Stat-Signature: i1sjd53mawqhdrp56jks65byyd9mhskh X-Rspam-User: X-HE-Tag: 1755279976-620349 X-HE-Meta: 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 3I0NY1KL xGXuRCadUBLVunMslWNwMEnCmicZbkdAxKhfvppq3sOJEs8ar28D6r8L7cKthLc5seXYQQOQmyc88Ln9MQTQ/CACp6+0H/MB7lWVVZfk6eI0V2104dd26wNKL0f8wiHn+obvOO2Nt0NSeEP4eDE4PJl+t/5ns5VbVQrH5IyfC22oy02GqKbnVql98LNTONq1TRUA14NfCgTEqYIqZG9H9fmbX9u36+IpzLNSV16gWfZa3E1TPxZR5uUwbOolIm/cfxVv3wisKr+wxjyTH8VkPo4PO6vt+QTHNSh7+euxLWxmI13VpRRiY83BhkUkj1B3Zkb7r7DBFDvxYAROSut4ykXGQnVHJcFwcHMQduURL1rBsnjcQkvX/aZwjDN6TzxlAlMNugi+0eE+CyHf3sGb5YMBKq7NNQAkJ8JqK5Kz4+n9iSf/Sv6jVSp12BCJfzK+cewCvpFWeGt4NJFAPdRWDPP5Spg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Aug 15, 2025 at 03:47:17PM +0100, Yeoreum Yun wrote: > > If we do something like mte_enable_kernel_asymm(), that one doesn't > > return any error, just fall back to the default mode. > > But, in case of mte_enable_kernel_asymm() need return to > change kasan_flag_write_only = false when it doesn't support which > used in KASAN Kunit test. > > If we don't return anything, when user set the write_only but HW doesn't > support it, KUNIT test get failure since kasan_write_only_enabled() > return true thou HW doesn't support it. Ah, ok, if we need this for the kunit test. I haven't checked the last patch. -- Catalin