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, 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 84661C4742C for ; Mon, 2 Nov 2020 16:04:39 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 302A92225E for ; Mon, 2 Nov 2020 16:04:39 +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="eTcXtcdf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 302A92225E 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 8A3E76B007E; Mon, 2 Nov 2020 11:04:38 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 855BC6B0080; Mon, 2 Nov 2020 11:04:38 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6F61C6B0081; Mon, 2 Nov 2020 11:04:38 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0043.hostedemail.com [216.40.44.43]) by kanga.kvack.org (Postfix) with ESMTP id 424466B007E for ; Mon, 2 Nov 2020 11:04:38 -0500 (EST) Received: from smtpin24.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id CDB7E180AD802 for ; Mon, 2 Nov 2020 16:04:37 +0000 (UTC) X-FDA: 77439950994.24.sky70_0003f2d272b1 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin24.hostedemail.com (Postfix) with ESMTP id ACC8F1A4A0 for ; Mon, 2 Nov 2020 16:04:37 +0000 (UTC) X-HE-Tag: sky70_0003f2d272b1 X-Filterd-Recvd-Size: 6295 Received: from mail-qk1-f202.google.com (mail-qk1-f202.google.com [209.85.222.202]) by imf34.hostedemail.com (Postfix) with ESMTP for ; Mon, 2 Nov 2020 16:04:37 +0000 (UTC) Received: by mail-qk1-f202.google.com with SMTP id h23so8527717qka.8 for ; Mon, 02 Nov 2020 08:04:37 -0800 (PST) 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=1lgjgRBViJ2FbMeVeB4B/ij4auA2e+RgHcIDFXlMEDw=; b=eTcXtcdfMvy+WyRtuvyCepkwJ6ocKrkM/ieC4IXk8mo02+7bgRtXbnpPS1nnrK4MPu jYDSZZBx2ojnnb8RSUPjQttkhA0yMtUHxrV0JfStvjLzl/Ock8CHF6cOpqK46YMtJjwd +v7644SuBx4yl2tYa+1nFY1X0iesetVgFBiG3iPcxKcnTqEydGRQIvmnbdmav46A1qbh lgEW9LSIvtCsvgb7FQADBiZLxy7DG5MBupKCzPeL19NWko5Yk4XipowXC6PSQQ6WRH6P EXlg1OKIPJLhYh17zpZiovtKMzy+GiJMsYQvdRH/4dWCqVI6mem5vvDbt2gkTqoCuP0B RLAA== 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=1lgjgRBViJ2FbMeVeB4B/ij4auA2e+RgHcIDFXlMEDw=; b=d+GptNlL7k7MKOKXr49f6Ex0s68GKpKkZcoJ5c7aWouibZpJ1zffmCdoe1Y4L909vn e9u8yoGFKjJPq+dNcxBc+S/OQy6Pj0/Kk/u9u4qyaH1w4AugV3VI33wzOA/ECYGgoYnU CtXlXiTNqt9tgY6ObWIKh8RCZ6P/4j2ZkPUnUpIh75zytsu5K50Z+XhtqPC46p3f0dyz NCQvkusYXRh/L/gFhmfd9wjrzyec6fTlc7cJhwhHjCH5Vv5b4EMtwmrJolb/x62tR2vi EigLXgovXl7Ysx51JcjY/AJUE9td4A3VcJX6QU4Z2GWWQ8Qij81x/IZcxaHRcLVNtHLe QCFQ== X-Gm-Message-State: AOAM531IePtVAFIU8+RY5N0LbqOHRsVqXIEUgv43KfUe+vCz4v/0ZpBB mN58cA7kWIp3kzEPgts1DgZIeQfJHU2kXG85 X-Google-Smtp-Source: ABdhPJyVr13ENFyTmUBYq3AfGMq6rXuKCfjybVY7GxJsx9eviaTcVoWJD27K8DdccUef3MIgT/vUdvhG7bdx1RZk X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a05:6214:162f:: with SMTP id e15mr23073972qvw.32.1604333076511; Mon, 02 Nov 2020 08:04:36 -0800 (PST) Date: Mon, 2 Nov 2020 17:03:44 +0100 In-Reply-To: Message-Id: <0fa21264ea32a5820bc6ba2ea2049ccd513cd016.1604333009.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.29.1.341.ge80a0c044ae-goog Subject: [PATCH v7 04/41] arm64: kasan: Add arch layer for memory tagging helpers From: Andrey Konovalov To: Catalin Marinas , Will Deacon Cc: Vincenzo Frascino , kasan-dev@googlegroups.com, Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Marco Elver , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , 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-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: This patch add a set of arch_*() memory tagging helpers currently only defined for arm64 when hardware tag-based KASAN is enabled. These helpers will be used by KASAN runtime to implement the hardware tag-based mode. The arch-level indirection level is introduced to simplify adding hardware tag-based KASAN support for other architectures in the future by defining the appropriate arch_*() macros. Signed-off-by: Andrey Konovalov Co-developed-by: Vincenzo Frascino Signed-off-by: Vincenzo Frascino Reviewed-by: Catalin Marinas --- Change-Id: I42b0795a28067872f8308e00c6f0195bca435c2a --- arch/arm64/include/asm/memory.h | 8 ++++++++ mm/kasan/kasan.h | 22 ++++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index cd61239bae8c..580d6ef17079 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -230,6 +230,14 @@ static inline const void *__tag_set(const void *addr, u8 tag) return (const void *)(__addr | __tag_shifted(tag)); } +#ifdef CONFIG_KASAN_HW_TAGS +#define arch_init_tags(max_tag) mte_init_tags(max_tag) +#define arch_get_random_tag() mte_get_random_tag() +#define arch_get_mem_tag(addr) mte_get_mem_tag(addr) +#define arch_set_mem_tag_range(addr, size, tag) \ + mte_set_mem_tag_range((addr), (size), (tag)) +#endif /* CONFIG_KASAN_HW_TAGS */ + /* * Physical vs virtual RAM address space conversion. These are * private definitions which should NOT be used outside memory.h diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h index ac499456740f..a4db457a9023 100644 --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -224,6 +224,28 @@ static inline const void *arch_kasan_set_tag(const void *addr, u8 tag) #define reset_tag(addr) ((void *)arch_kasan_reset_tag(addr)) #define get_tag(addr) arch_kasan_get_tag(addr) +#ifdef CONFIG_KASAN_HW_TAGS + +#ifndef arch_init_tags +#define arch_init_tags(max_tag) +#endif +#ifndef arch_get_random_tag +#define arch_get_random_tag() (0xFF) +#endif +#ifndef arch_get_mem_tag +#define arch_get_mem_tag(addr) (0xFF) +#endif +#ifndef arch_set_mem_tag_range +#define arch_set_mem_tag_range(addr, size, tag) ((void *)(addr)) +#endif + +#define hw_init_tags(max_tag) arch_init_tags(max_tag) +#define hw_get_random_tag() arch_get_random_tag() +#define hw_get_mem_tag(addr) arch_get_mem_tag(addr) +#define hw_set_mem_tag_range(addr, size, tag) arch_set_mem_tag_range((addr), (size), (tag)) + +#endif /* CONFIG_KASAN_HW_TAGS */ + /* * Exported functions for interfaces called from assembly or from generated * code. Declarations here to avoid warning about missing declarations. -- 2.29.1.341.ge80a0c044ae-goog