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=-21.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable 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 E9266C433DB for ; Mon, 1 Feb 2021 19:58:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 98B4960232 for ; Mon, 1 Feb 2021 19:58:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232588AbhBAT62 (ORCPT ); Mon, 1 Feb 2021 14:58:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40068 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229963AbhBAToZ (ORCPT ); Mon, 1 Feb 2021 14:44:25 -0500 Received: from mail-wr1-x449.google.com (mail-wr1-x449.google.com [IPv6:2a00:1450:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82EEDC06174A for ; Mon, 1 Feb 2021 11:43:41 -0800 (PST) Received: by mail-wr1-x449.google.com with SMTP id s15so11044909wrt.14 for ; Mon, 01 Feb 2021 11:43:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:message-id:mime-version:subject:from:to:cc; bh=rJ16AiwqkpNVRFh+KkU2Ds7vTu96Je2z+5GU1bmSu0w=; b=sCPdWL3Ta0DpJRTYs6YqOedNph2JZBXXN/fK4StwO4OsV7a04cBNEoH089CZSJWqUB iRBZjs2U3hbbgmYqYIyRQo4/lJlthvUzW2iZuFFcgqS37Yf9BEuhiSFvdBJU8/oXNFbk E4v+77CSwMd/ZoYDRDs557B76A0+B0X3oRKAu34bVUiCysdR4Egshk29jdIopw+qWeJl w2rKw3kfRvFogekmwxhQmjW50dPploue1Sfo2fXHusBjbCyFm9UEoxj5PUUpIJh2huVC oSEdjcoh2PtfMA7bJmBZE93yLmhwujoX+aORuN1XU1hUZ/WedkYkl69gOPJFoXQCHE2K YehQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:message-id:mime-version:subject:from :to:cc; bh=rJ16AiwqkpNVRFh+KkU2Ds7vTu96Je2z+5GU1bmSu0w=; b=q5+JHPwGOe6xt98+gnsAYVhzEtP0bLp5DXNB1XEmKwSn2/fh5PixRIPWyz0FRlF/8i Grp/yJoE+wMvk5s4xrLMm+Dd23QS1IbyH9awMD8xk0Secnj6gyi0IW7l7euGuLMSykVa l/xKex/lgyOI65dV5a+cOSozIvapQSWgSL8aZbrqbIDrcafKF6SqOLggloZXU27LxEZt BQxjHIOmrKJZY8oDXn4PU7nDkc1wxei6O6vZpzvTqGIkHIY4+kx5ulMN9PeCi6V2a1hV NUEY2XxpuRzKUvp3xXaeUurd1WMGxkE45LrSh7xtL25qB5VimsiRJZNIxIva7dJDa9R1 Trog== X-Gm-Message-State: AOAM532zvcZ+iOqHQ7+U1ozQtFPfiwa2SwVrECdFgYZHJtTRUWJO7El8 EsIdgBUu89rskD9Mo2+CUEZMZ8hFLgkaaUV+ X-Google-Smtp-Source: ABdhPJx0GGA/oYC3Q5vVJSxYh6mDgQG3g7RSK4wThiuyHA7aa0OWsctlY8JNwnGUn/Z8d+sJQ/MjD2ldz3KK5zid Sender: "andreyknvl via sendgmr" X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:7220:84ff:fe09:7e9d]) (user=andreyknvl job=sendgmr) by 2002:a1c:356:: with SMTP id 83mr415730wmd.31.1612208620129; Mon, 01 Feb 2021 11:43:40 -0800 (PST) Date: Mon, 1 Feb 2021 20:43:24 +0100 Message-Id: Mime-Version: 1.0 X-Mailer: git-send-email 2.30.0.365.g02bc693789-goog Subject: [PATCH 00/12] kasan: optimizations and fixes for HW_TAGS From: Andrey Konovalov To: Catalin Marinas , Vincenzo Frascino , Dmitry Vyukov , Alexander Potapenko , Marco Elver Cc: Andrew Morton , Will Deacon , Andrey Ryabinin , Peter Collingbourne , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset goes on top of: 1. Vincenzo's async support patches, and 2. "kasan: untag addresses for KFENCE" fix. This patchset makes the HW_TAGS mode more efficient, mostly by reworking poisoning approaches and simplifying/inlining some internal helpers. With this change, the overhead of HW_TAGS annotations excluding setting and checking memory tags is ~3%. The performance impact caused by tags will be unknown until we have hardware that supports MTE. As a side-effect, this patchset speeds up generic KASAN by ~15%. Andrey Konovalov (12): kasan, mm: don't save alloc stacks twice kasan, mm: optimize kmalloc poisoning kasan: optimize large kmalloc poisoning kasan: clean up setting free info in kasan_slab_free kasan: unify large kfree checks kasan: rework krealloc tests kasan, mm: remove krealloc side-effect kasan, mm: optimize krealloc poisoning kasan: ensure poisoning size alignment arm64: kasan: simplify and inline MTE functions kasan: always inline HW_TAGS helper functions arm64: kasan: export MTE symbols for KASAN tests arch/arm64/include/asm/cache.h | 1 - arch/arm64/include/asm/kasan.h | 1 + arch/arm64/include/asm/mte-def.h | 2 + arch/arm64/include/asm/mte-kasan.h | 64 ++++++++-- arch/arm64/include/asm/mte.h | 2 - arch/arm64/kernel/mte.c | 48 +------- arch/arm64/lib/mte.S | 16 --- include/linux/kasan.h | 25 ++-- lib/test_kasan.c | 111 +++++++++++++++-- mm/kasan/common.c | 187 ++++++++++++++++++++--------- mm/kasan/kasan.h | 74 +++++++++--- mm/kasan/shadow.c | 53 ++++---- mm/slab_common.c | 18 ++- mm/slub.c | 3 +- 14 files changed, 419 insertions(+), 186 deletions(-) -- 2.30.0.365.g02bc693789-goog