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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,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 3B908C71156 for ; Tue, 1 Dec 2020 16:17:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8BA8C22274 for ; Tue, 1 Dec 2020 16:17:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=axtens.net header.i=@axtens.net header.b="aaIMgn1k" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404105AbgLAQR2 (ORCPT ); Tue, 1 Dec 2020 11:17:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34820 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404098AbgLAQR1 (ORCPT ); Tue, 1 Dec 2020 11:17:27 -0500 Received: from mail-pl1-x641.google.com (mail-pl1-x641.google.com [IPv6:2607:f8b0:4864:20::641]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9627C0613D4 for ; Tue, 1 Dec 2020 08:16:41 -0800 (PST) Received: by mail-pl1-x641.google.com with SMTP id v3so1374891plz.13 for ; Tue, 01 Dec 2020 08:16:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axtens.net; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=N0YdCjkJ51EOhZtuBaCrGJ/RvqotXRv8loSeq+0K1Lw=; b=aaIMgn1kMgD56TG5g0Vi0ZkKk6tnzbIUF1pfDYVYgvX7pggmfVvYYTd1Op8oEFa5Qn jcyh85859ruNoHIygqJnBsOe9WlQuE2aD0H/iS7qoLbb2lx86xlSuSMhjpkFrtqevRS5 9nqF6NnLxd0AtaCPpFxA7HmRVmDGrNM1bGLas= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=N0YdCjkJ51EOhZtuBaCrGJ/RvqotXRv8loSeq+0K1Lw=; b=KYZ25F15lEH0Ovq4seov0eQcCKKCmzvxXHX+NpRkIWL9bk6WoTkuF4b3VGywOtXvCL oIHATQsVNFEb0LKIGlw2d9BSEU9oCMwOo4kVAh91DJYEhQiOGnav6+4kpWQEMubQ4qIU MYJlF2UFQSc21JD0jiIPxNz4SAcLtBHafiBqELvuQ/fKWGqzhPG4vh+Qmfe99bpIy1nJ Ie2uV1Fw984qc0nBAGJik54UBgL6z8nqiqQSKHYmQQ/wbuslD151akiptwBaGtVlfcXy R0QvbQ0BHuDDKegkWUWavoCPFrPFdmofLAp2sWfvm8ixw/byE5cROr27VRz34Sgq/rVb ra+w== X-Gm-Message-State: AOAM531NCKUPDySjMfMQ+EAQpdoDyna45v7pABINk+MO6RbM7sRI8LzM AzpIekDcKR52C4H89eGO9fL6AUmOKOtXYw== X-Google-Smtp-Source: ABdhPJyXoEkCjSN+IDdIpKLJVoutR17sCfVu7a/oC94ndZZBF9Z2S63HRCawbS5ZfYp8mS2kuNDaTg== X-Received: by 2002:a17:90a:a2e:: with SMTP id o43mr3337563pjo.59.1606839401186; Tue, 01 Dec 2020 08:16:41 -0800 (PST) Received: from localhost (2001-44b8-111e-5c00-f932-2db6-916f-25e2.static.ipv6.internode.on.net. [2001:44b8:111e:5c00:f932:2db6:916f:25e2]) by smtp.gmail.com with ESMTPSA id q72sm222708pfq.62.2020.12.01.08.16.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Dec 2020 08:16:40 -0800 (PST) From: Daniel Axtens To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, kasan-dev@googlegroups.com, christophe.leroy@c-s.fr, aneesh.kumar@linux.ibm.com, bsingharora@gmail.com Cc: Daniel Axtens Subject: [PATCH v9 1/6] kasan: allow an architecture to disable inline instrumentation Date: Wed, 2 Dec 2020 03:16:27 +1100 Message-Id: <20201201161632.1234753-2-dja@axtens.net> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201201161632.1234753-1-dja@axtens.net> References: <20201201161632.1234753-1-dja@axtens.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For annoying architectural reasons, it's very difficult to support inline instrumentation on powerpc64. Add a Kconfig flag to allow an arch to disable inline. (It's a bit annoying to be 'backwards', but I'm not aware of any way to have an arch force a symbol to be 'n', rather than 'y'.) Signed-off-by: Daniel Axtens --- lib/Kconfig.kasan | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan index 542a9c18398e..31a0b28f6c2b 100644 --- a/lib/Kconfig.kasan +++ b/lib/Kconfig.kasan @@ -9,6 +9,9 @@ config HAVE_ARCH_KASAN_SW_TAGS config HAVE_ARCH_KASAN_VMALLOC bool +config HAVE_ARCH_NO_KASAN_INLINE + def_bool n + config CC_HAS_KASAN_GENERIC def_bool $(cc-option, -fsanitize=kernel-address) @@ -108,6 +111,7 @@ config KASAN_OUTLINE config KASAN_INLINE bool "Inline instrumentation" + depends on !HAVE_ARCH_NO_KASAN_INLINE help Compiler directly inserts code checking shadow memory before memory accesses. This is faster than outline (in some workloads -- 2.25.1