From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 766ECC433E2 for ; Tue, 15 Sep 2020 21:17:33 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2496E20770 for ; Tue, 15 Sep 2020 21:17:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=google.com header.i=@google.com header.b="Yy3NAxKG" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2496E20770 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id AE8BE900090; Tue, 15 Sep 2020 17:17:32 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id ABF1990008A; Tue, 15 Sep 2020 17:17:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 98818900090; Tue, 15 Sep 2020 17:17:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0094.hostedemail.com [216.40.44.94]) by kanga.kvack.org (Postfix) with ESMTP id 819FD90008A for ; Tue, 15 Sep 2020 17:17:32 -0400 (EDT) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 4CA662497 for ; Tue, 15 Sep 2020 21:17:32 +0000 (UTC) X-FDA: 77266557144.09.elbow76_161565b27114 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin09.hostedemail.com (Postfix) with ESMTP id 2A8F5180AD807 for ; Tue, 15 Sep 2020 21:17:32 +0000 (UTC) X-HE-Tag: elbow76_161565b27114 X-Filterd-Recvd-Size: 5149 Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) by imf44.hostedemail.com (Postfix) with ESMTP for ; Tue, 15 Sep 2020 21:17:31 +0000 (UTC) Received: by mail-wr1-f74.google.com with SMTP id y3so1697420wrl.21 for ; Tue, 15 Sep 2020 14:17:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=gQNZi1xbbNqueATb+Ofst812z+wTX6Uhy5JHBLW29HQ=; b=Yy3NAxKGs0090BOPTba/nzO4cFPD9qSiFj0muhX6uXXMpAPGomh/ZDVdoYoyMlJR2H lIazQ2HvczoFsJTOWPdKzJYfc2/WOOw9C0hGyRF9UQYgPE3AgqDYVZNtdqTPibhmoXf1 VMf+YKRB6flrLwpkd/7RoFRlnJ08ZGYvHEW2PcJoF+BsjcFwlCOhxqpdr/MY9g7x5o7R VH9u2MeaeqzIdTc+ZxJb27i3vPDxpiSRfNRQmZDcS6TPnaY9a9KOzceh+71b+fUis8/9 GkMM1tMTE9Ao04l35J6odqEAVgW/k0Ib0q1fXWI+cyy/5MUehNYMowaBVV3WbqukJYDt FAgw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=gQNZi1xbbNqueATb+Ofst812z+wTX6Uhy5JHBLW29HQ=; b=dnqAvh3W8B5zQCbsoc+xE7AjLaV4dIn1HfjHe1+AhI5TDhzyap9PgNXEFHOfqLQxN8 2dnAYrnA8hO/2WtIWu8KMZhgZDYfekN44AUb81CVX+Zi1z8JpO0tiQp2E+c8Sh/4GHvO +WRRU4i0nxfn09IOQeHV+z1kIXRh8fkqYsEWcLq+vSxc8DCoXjXyqL60B9vNaDIG7GSw pzqI10+fVJP+yBLtUHB1Z2+IBvVKZZySOuK1ENv28qAkixgn3gRur2KBKSF3GWrcA6dE AREHVBqKp61JKttykaeoNbVkCotLwe02dhhYueGDGEPUWDt32cLPbX/6lpccJPh4EsYp jiiw== X-Gm-Message-State: AOAM533w6EmKTgeydJOG0ZsTrKQxp4nkTer56TRE0D0CJI1D3MOstloZ EUdz3cc1QiOI7JiFyJW5W3yp9SvrOOlMwMOL X-Google-Smtp-Source: ABdhPJxSdz7eZtkr4LcxuG7RUBwuiBQj3nl4wipePG7BDeui7hcx3jwqP/ZGF3lGDPtyJkewnREY16db2QT71g3F X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:adf:dd44:: with SMTP id u4mr22386734wrm.22.1600204650809; Tue, 15 Sep 2020 14:17:30 -0700 (PDT) Date: Tue, 15 Sep 2020 23:16:10 +0200 In-Reply-To: Message-Id: <9ecc27d43a01ca32bcacf44b393a9a100e0dfdb2.1600204505.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.28.0.618.gf4bc123cb7-goog Subject: [PATCH v2 28/37] arm64: kasan: 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, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 2A8F5180AD807 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 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: 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 Co-developed-by: Andrey Konovalov Signed-off-by: Andrey Konovalov --- Change-Id: I91944903bc9c9c9044f0d50e74bcd6b9971d21ff --- arch/arm64/mm/proc.S | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S index 5ba7ac5e9c77..1687447dee7a 100644 --- a/arch/arm64/mm/proc.S +++ b/arch/arm64/mm/proc.S @@ -40,9 +40,13 @@ #define TCR_CACHE_FLAGS TCR_IRGN_WBWA | TCR_ORGN_WBWA #ifdef CONFIG_KASAN_SW_TAGS -#define TCR_KASAN_FLAGS TCR_TBI1 +#define TCR_KASAN_SW_FLAGS TCR_TBI1 #else -#define TCR_KASAN_FLAGS 0 +#define TCR_KASAN_SW_FLAGS 0 +#endif + +#ifdef CONFIG_KASAN_HW_TAGS +#define TCR_KASAN_HW_FLAGS TCR_TBI1 #endif /* @@ -462,7 +466,7 @@ SYM_FUNC_START(__cpu_setup) */ mov_q x10, TCR_TxSZ(VA_BITS) | TCR_CACHE_FLAGS | TCR_SMP_FLAGS | \ TCR_TG_FLAGS | TCR_KASLR_FLAGS | TCR_ASID16 | \ - TCR_TBI0 | TCR_A1 | TCR_KASAN_FLAGS + TCR_TBI0 | TCR_A1 | TCR_KASAN_SW_FLAGS tcr_clear_errata_bits x10, x9, x5 #ifdef CONFIG_ARM64_VA_BITS_52 @@ -495,6 +499,9 @@ SYM_FUNC_START(__cpu_setup) /* Update TCR_EL1 if MTE is supported (ID_AA64PFR1_EL1[11:8] > 1) */ cbz mte_present, 1f orr x10, x10, #SYS_TCR_EL1_TCMA1 +#ifdef CONFIG_KASAN_HW_TAGS + orr x10, x10, #TCR_KASAN_HW_FLAGS +#endif 1: .unreq mte_present #endif -- 2.28.0.618.gf4bc123cb7-goog