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d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=PrZ8Xx7ZOES69PjxJ7W+uco2MTpU8K38pV5r5s6HLuc=; b=Kqqx2FocAqsNcZbhkc7kigT2CChH4fI6hDhPjeFZJhd5TGYeTr+ltSSiV5Yn4KtEUK wSuJJDRE9qctNgMGhcP93rf3dgUl+uzn6z5FPPU/gd638juPcJPipGbdjhX+aKeDAHHC ZGfwrHcnKKJFVxmW4S7l+838hzgkQHJ6PrksiZguPZC2pLXPupilAmfTqLWoiPM3erHP fVBTap6hdKcQd1LbJOpIFkJA/HlwTWAqZczG4KMcYOC2/W3cXIlCpva9N818P2b01ijY gb0YQuGpGIky1zxo+Kfgv2hkZN/aQKMCQAwSFH6/aMK7Jr73KYJe6YDFHK3Uwh/Cpy3v Mjiw== X-Gm-Message-State: AOAM5338750+UkBQgzEEMQEaJR9YEJYV9TadScdsWJNu/JyC79Wp4zUc AWo1amxxvYCGHlpDh4c5exRaZKHvyVMZmnG/ X-Google-Smtp-Source: ABdhPJyLILHteR8XQv6ASUjnKzzYpuETsrstUrOhCFHCsdKqZXOKezDHAwecoNC7DdH7utKm4OIpglyx7bKUIliq X-Received: by 2002:a0c:99c8:: with SMTP id y8mr3624054qve.57.1597426105434; Fri, 14 Aug 2020 10:28:25 -0700 (PDT) Date: Fri, 14 Aug 2020 19:27:08 +0200 In-Reply-To: Message-Id: <518da1e5169a4e343caa3c37feed5ad551b77a34.1597425745.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.28.0.220.ged08abb693-goog Subject: [PATCH 26/35] kasan, arm64: Enable TBI EL1 From: Andrey Konovalov To: Dmitry Vyukov , Vincenzo Frascino , Catalin Marinas , kasan-dev@googlegroups.com Cc: Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: AEE6C18229818 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Vincenzo Frascino Hardware tag-based KASAN relies on Memory Tagging Extension (MTE) that is built on top of the Top Byte Ignore (TBI) feature. Enable in-kernel TBI when CONFIG_KASAN_HW_TAGS is turned on by enabling the TCR_TBI1 bit in proc.S. Signed-off-by: Vincenzo Frascino --- arch/arm64/mm/proc.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 152d74f2cc9c..6880ddaa5144 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -38,7 +38,7 @@ /* PTWs cacheable, inner/outer WBWA */ #define TCR_CACHE_FLAGS TCR_IRGN_WBWA | TCR_ORGN_WBWA -#ifdef CONFIG_KASAN_SW_TAGS +#if defined(CONFIG_KASAN_SW_TAGS) || defined(CONFIG_KASAN_HW_TAGS) #define TCR_KASAN_FLAGS TCR_TBI1 #else #define TCR_KASAN_FLAGS 0 -- 2.28.0.220.ged08abb693-goog