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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 F3BE3C2BB55 for ; Wed, 15 Apr 2020 15:37:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D32A720767 for ; Wed, 15 Apr 2020 15:37:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="WRxp2lhf" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1414777AbgDOPh2 (ORCPT ); Wed, 15 Apr 2020 11:37:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49404 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1414766AbgDOPhX (ORCPT ); Wed, 15 Apr 2020 11:37:23 -0400 Received: from mail-qk1-x72d.google.com (mail-qk1-x72d.google.com [IPv6:2607:f8b0:4864:20::72d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B641C061A0E for ; Wed, 15 Apr 2020 08:37:23 -0700 (PDT) Received: by mail-qk1-x72d.google.com with SMTP id y3so17629986qky.8 for ; Wed, 15 Apr 2020 08:37:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=EeFIVTegln/F+8Ij5JttngNbXaEaGERsEIMec13qZzg=; b=WRxp2lhfPadNKlqzoLQV8hxug+VjD1ar3yARtG3bgGXwaV60vtGjZu8bYj/o37CTnb zB9cQxs1a26yeWJxcq0kShTttFpZdGdVWGFu2b2NWqZtAUSvKXrdWq1e61oPN65WnmPv 0wOyIFtOQ+sdg9DpVuH+Y9bIzb1WyusCnIKviWgXUBuPrlUD4FkuIJ8ilAH4pOlXDPs5 RDFFcI86GJlJlgy1CIJS+sVrjplPRCBwz5CS0669dIORCcYAqaa0aS8nLJF1HkEVDFn8 jLh4wehfQ/a5bDFy1BtqaBNoIWddIDLPYeSBKvL4Dl5RZV/c/WlhfsftBxtC7yrquuNs FE3w== 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:mime-version :content-transfer-encoding; bh=EeFIVTegln/F+8Ij5JttngNbXaEaGERsEIMec13qZzg=; b=ASafoGU7V7uzUOoV2cD4kXc2qUPTXBV/1q8f2h1CNcOyG6e9yLosLwroS8yBXDhG9u DnG5qMej6Rc4+ziOmqCZrj3JweQogBth1g2vG2vYv4kJuzA2JYI/+Pa/p8Ga0JR1ymdt FpRaA5ctRpwiNhjTmb3EYgVXUrEgWnu4j42OQYaa4Sf7XiG0KNn99zL+CRJ2JCyDMC28 cSWo+BHtsE3naPZO7xgfde0nMxXA9g+yAFNojLsJ0bSKGHOOLWvy3PKPEqzg+1GZrSew OMTDYxZFJigIX9ohYCCNSroPs1hs1gPyaFBje1B4kMQaZjaVvXFg0DqlxJG3WxtCABcX nXiw== X-Gm-Message-State: AGi0PuZSzfbQtJytIogad2JZbj92kndtE0oeco7dZtXga9mPch2cvByV Fi6/rpkrUGrt4omq8D5ltbx3Lg== X-Google-Smtp-Source: APiQypJ7MP0hT7vNZTsu3/X7j7aM4EOHAvvziUhebjXuHKDZ0gVy14WJy7E9ieTiHCGKFcrHes4q2w== X-Received: by 2002:a37:9dd6:: with SMTP id g205mr8286950qke.9.1586965042621; Wed, 15 Apr 2020 08:37:22 -0700 (PDT) Received: from ovpn-113-148.phx2.redhat.com (pool-71-184-117-43.bstnma.fios.verizon.net. [71.184.117.43]) by smtp.gmail.com with ESMTPSA id i20sm12549999qkl.135.2020.04.15.08.37.21 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 15 Apr 2020 08:37:21 -0700 (PDT) From: Qian Cai To: paulmck@kernel.org, pbonzini@redhat.com Cc: elver@google.com, sean.j.christopherson@intel.com, kasan-dev@googlegroups.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Qian Cai Subject: [PATCH -next] kvm/svm: disable KCSAN for svm_vcpu_run() Date: Wed, 15 Apr 2020 11:37:09 -0400 Message-Id: <20200415153709.1559-1-cai@lca.pw> X-Mailer: git-send-email 2.21.0 (Apple Git-122.2) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For some reasons, running a simple qemu-kvm command with KCSAN will reset AMD hosts. It turns out svm_vcpu_run() could not be instrumented. Disable it for now. # /usr/libexec/qemu-kvm -name ubuntu-18.04-server-cloudimg -cpu host -smp 2 -m 2G -hda ubuntu-18.04-server-cloudimg.qcow2 === console output === Kernel 5.6.0-next-20200408+ on an x86_64 hp-dl385g10-05 login: <...host reset...> HPE ProLiant System BIOS A40 v1.20 (03/09/2018) (C) Copyright 1982-2018 Hewlett Packard Enterprise Development LP Early system initialization, please wait... Signed-off-by: Qian Cai --- arch/x86/kvm/svm/svm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 2be5bbae3a40..1fdb300e9337 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3278,7 +3278,7 @@ static void svm_cancel_injection(struct kvm_vcpu *vcpu) bool __svm_vcpu_run(unsigned long vmcb_pa, unsigned long *regs); -static void svm_vcpu_run(struct kvm_vcpu *vcpu) +static __no_kcsan void svm_vcpu_run(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); -- 2.21.0 (Apple Git-122.2)