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=-23.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_IN_DEF_DKIM_WL 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 161B5C4361B for ; Wed, 9 Dec 2020 18:51:20 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id A401222BF3 for ; Wed, 9 Dec 2020 18:51:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A401222BF3 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 09C1C8D0041; Wed, 9 Dec 2020 13:51:19 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 04C8D8D0031; Wed, 9 Dec 2020 13:51:18 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EA7B88D0041; Wed, 9 Dec 2020 13:51:18 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0135.hostedemail.com [216.40.44.135]) by kanga.kvack.org (Postfix) with ESMTP id D3B088D0031 for ; Wed, 9 Dec 2020 13:51:18 -0500 (EST) Received: from smtpin30.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 956F2180AD81D for ; Wed, 9 Dec 2020 18:51:18 +0000 (UTC) X-FDA: 77574636636.30.stone39_2105aa2273f1 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin30.hostedemail.com (Postfix) with ESMTP id 71A68180B3C83 for ; Wed, 9 Dec 2020 18:51:18 +0000 (UTC) X-HE-Tag: stone39_2105aa2273f1 X-Filterd-Recvd-Size: 4727 Received: from mail-ot1-f68.google.com (mail-ot1-f68.google.com [209.85.210.68]) by imf29.hostedemail.com (Postfix) with ESMTP for ; Wed, 9 Dec 2020 18:51:17 +0000 (UTC) Received: by mail-ot1-f68.google.com with SMTP id f16so2383469otl.11 for ; Wed, 09 Dec 2020 10:51:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=YT5BHJcxpuXHRj14Xs4MOizg/4PTRYgUUf1aSMIZM3Y=; b=Hc+1o93cAMl1ROHeeYK6Kbiz3vyKi1cQ31vynsXzwNw/FN4xhHJq36IYk3VLEg06k0 BT/p1ci4U+C/TFSkW1Uog19rU5q1AcvQVcgtWo3I/xFQEx8gZVNeSGOQgNukUrYZDz6K rx2BHlLuQuUR30NB1eQ7S4AmoWJf1/iQWX0bo02SKN6fpg8NNM5slv861Z3G98QRi48m RFhusNMk0juk4N6Vwhoo96QLnGw7fzN8U+fPk5l2k5h6HKGy1VE6lAFsbaXJg/Jt7wN0 sCKF4oabqEAN5XGW8fjbtaBCa0T7YU65ZcLlJUeumQe5dDBxG3hrDrXqYl3ujR9mfoqY bErQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=YT5BHJcxpuXHRj14Xs4MOizg/4PTRYgUUf1aSMIZM3Y=; b=R9SggAf5ypVYW+WB+dt+29t/U4slUXs2WrA3KWP2k6dKal5m03U7zy9NMT0VlSaPeu DC24mJwgvPJscF1up8QkKUr5mo0DLEgbLkY6iduFEgG3ftYlhbQWnIbtZzfDRELeVxlt jUxpLGKRai/13CV4Xf9joHbyKoWByltKskZmJp4Bi5IE/IBaQziEAjvV8S/VbuKraNQd b6NeX7xOH2U7Y/caJFHzGXWOrgEfJwYTrBUJyCG1MAjUj2njy4WvDOuQHHYPvQx1fQYK FSmsFI7Ht6KH9IQSrXxqoxIwxMqInLQpV/qU1lzxyTsxab4VyUGjd1yFkM+aiWc4x9Qa Qy6A== X-Gm-Message-State: AOAM531fKFRe8CIyA2T69wKE7DJfv+DXE/rRjx2YzLiWaWcbF+kV9KOf 2ADMdSYLKigyn1PZ59ez7WpFCWYfR0X/2LRNQFHA2g== X-Google-Smtp-Source: ABdhPJzjg43trPv/rgu+HRPFPFmTDSamvp5BPSMCfszGWyUgt789RrPbJTDwY25i1OliM5E4KsPW5RTWipc+t3ILdmA= X-Received: by 2002:a9d:7cc8:: with SMTP id r8mr3011278otn.233.1607539877102; Wed, 09 Dec 2020 10:51:17 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Marco Elver Date: Wed, 9 Dec 2020 19:51:05 +0100 Message-ID: Subject: Re: [PATCH mm 2/2] Revert "kasan, arm64: don't allow SW_TAGS with ARM64_MTE" To: Andrey Konovalov Cc: Andrew Morton , Catalin Marinas , Will Deacon , Vincenzo Frascino , Dmitry Vyukov , Andrey Ryabinin , Alexander Potapenko , Evgenii Stepanov , Branislav Rankov , Kevin Brodsky , kasan-dev , Linux ARM , Linux Memory Management List , LKML 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: On Wed, 9 Dec 2020 at 19:24, Andrey Konovalov wrote: > > This reverts "kasan, arm64: don't allow SW_TAGS with ARM64_MTE". > > In earlier versions on the hardware tag-based KASAN patchset in-kernel > MTE used to be always enabled when CONFIG_ARM64_MTE is on. This caused > conflicts with the software tag-based KASAN mode. > > This is no logner the case: in-kernel MTE is never enabled unless the > CONFIG_KASAN_HW_TAGS is enabled, so there are no more conflicts with > CONFIG_KASAN_SW_TAGS. > > Allow CONFIG_KASAN_SW_TAGS to be enabled even when CONFIG_ARM64_MTE is > enabled. > > Signed-off-by: Andrey Konovalov Reviewed-by: Marco Elver > --- > arch/arm64/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 6fefab9041d8..62a7668976a2 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -135,7 +135,7 @@ config ARM64 > select HAVE_ARCH_JUMP_LABEL > select HAVE_ARCH_JUMP_LABEL_RELATIVE > select HAVE_ARCH_KASAN if !(ARM64_16K_PAGES && ARM64_VA_BITS_48) > - select HAVE_ARCH_KASAN_SW_TAGS if (HAVE_ARCH_KASAN && !ARM64_MTE) > + select HAVE_ARCH_KASAN_SW_TAGS if HAVE_ARCH_KASAN > select HAVE_ARCH_KASAN_HW_TAGS if (HAVE_ARCH_KASAN && ARM64_MTE) > select HAVE_ARCH_KFENCE > select HAVE_ARCH_KGDB > -- > 2.29.2.576.ga3fc446d84-goog >