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=-26.3 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,MENTIONS_GIT_HOSTING,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 75E21C433E0 for ; Fri, 5 Feb 2021 23:47:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35AEC64FA9 for ; Fri, 5 Feb 2021 23:47:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231352AbhBEXqL (ORCPT ); Fri, 5 Feb 2021 18:46:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232492AbhBEORn (ORCPT ); Fri, 5 Feb 2021 09:17:43 -0500 Received: from mail-vk1-xa49.google.com (mail-vk1-xa49.google.com [IPv6:2607:f8b0:4864:20::a49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2B9ABC061221 for ; Fri, 5 Feb 2021 07:47:14 -0800 (PST) Received: by mail-vk1-xa49.google.com with SMTP id b28so1632212vko.23 for ; Fri, 05 Feb 2021 07:47:14 -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=PJe3Rz3EeSdJQyMwgR6n+MLd+6qUSUTULfhGZkHnlC0=; b=GLpv906g70oyvKfx1lT8SRlfZX2GptMlW62xAuuPrNcN5zEhH2h3cLKrfSCDjRMFmU u4PksceHe87HdqGH5yoTD8mj36rlwfetF+aaiHsU0z6CWtT3Ek0ktXZ3ZXLWRnbeRz+t MSbUY+sjHlx+0um5/NpwJr+RE7EzMFWL0gF64teWSuITRQL0gQSnDU85jJv2OP85+G2r SgNt+Szam3Q4/rRxSSQ8joLWgA/dbIyBEz6IbVeaY77h/JmVlXLcEzq9Sqawa5rQSGkq 9En+9QURKs1MSdqNAup9OsWlAS7XkoN2apB1AowPfwA42QdwnhAIvQ1gSagLgJoWQIrz +Yng== 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=PJe3Rz3EeSdJQyMwgR6n+MLd+6qUSUTULfhGZkHnlC0=; b=MGXCciGSoxhTxFunL81LTaSgKuELD9mWx0VnEwskZLDWd7ZiAtQUVqoLC6+gzueMuX sbClN96yBRTpeBGMp+keUhFteEHCx7YQOSLFheg1USEPYuXPYTxn/DcTlphp+5cZPaiC /o64roXEqoKbBRDY/o1bRA3LeBffHFBTncLD776BQnYTDORn0QXbF0XVJHsGcaqYw2g6 58N7Sss5sMbGeWyS2T0HBVHhEU8g94kMQvzs6J1cn7Ft3EWW+8+ug8Ypgu5FN826pkfS aTSpBSO6sMWoIEbqtYYMPzPCX5zEkEEXbFnwUWwMB6IpT8sGEc8j24wLHs0EQ9kRITEp hEyg== X-Gm-Message-State: AOAM531drPjNf595XhFWAouJpmYleoHcHw1nH9CzKuMJzEr4GxFOP8EP L23qBY9S9bD3FMTn23D/oByFBqFrXm6TgNoL X-Google-Smtp-Source: ABdhPJzslOGVJmt8BToaF+8002Gc6wGSVe80ou5CaX5bVJOBaYQOullRpF7SC/hcnNqvALzxl6/B1Gm2DaOADJ/b Sender: "andreyknvl via sendgmr" X-Received: from andreyknvl3.muc.corp.google.com ([2a00:79e0:15:13:edb8:b79c:2e20:e531]) (user=andreyknvl job=sendgmr) by 2002:a0c:a692:: with SMTP id t18mr5040489qva.18.1612539558216; Fri, 05 Feb 2021 07:39:18 -0800 (PST) Date: Fri, 5 Feb 2021 16:39:01 +0100 Message-Id: Mime-Version: 1.0 X-Mailer: git-send-email 2.30.0.365.g02bc693789-goog Subject: [PATCH v2 00/12] kasan: optimizations and fixes for HW_TAGS From: Andrey Konovalov To: Andrew Morton , Catalin Marinas , Vincenzo Frascino , Dmitry Vyukov , Alexander Potapenko , Marco Elver Cc: 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 [1], and 2. "kasan: untag addresses for KFENCE" fix [2] (already in mm). [1] https://lore.kernel.org/linux-arm-kernel/20210130165225.54047-1-vincenzo.frascino@arm.com/ [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=akpm&id=dec4728fab910da0c86cf9a97e980f4244ebae9f 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: fail krealloc on freed objects kasan, mm: optimize krealloc poisoning kasan: ensure poisoning size alignment arm64: kasan: simplify and inline MTE functions kasan: 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 | 65 ++++++++-- 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 | 72 +++++++++-- mm/kasan/shadow.c | 53 ++++---- mm/slab_common.c | 18 ++- mm/slub.c | 3 +- 14 files changed, 418 insertions(+), 186 deletions(-) -- 2.30.0.365.g02bc693789-goog