From nobody Wed Apr 15 00:04:47 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BA711C00144 for ; Fri, 29 Jul 2022 12:22:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235495AbiG2MWE (ORCPT ); Fri, 29 Jul 2022 08:22:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52874 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229871AbiG2MWB (ORCPT ); Fri, 29 Jul 2022 08:22:01 -0400 Received: from mail-lf1-x134.google.com (mail-lf1-x134.google.com [IPv6:2a00:1450:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 36FBA61727 for ; Fri, 29 Jul 2022 05:22:00 -0700 (PDT) Received: by mail-lf1-x134.google.com with SMTP id p10so7035711lfd.9 for ; Fri, 29 Jul 2022 05:22:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=profian-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=OnpMDbAGT3435SYeG/PuiMkkIvduYtBcbEfOdwrgav0=; b=KPuPNa0tPqTmVunPM8do8wBS8wNRtGFF8MmJefwl4f13rJKccVZHIkyAQjs65+AUSI JDdo6dbVEhU9w+traz0cPNSgP7UtRsiMVdSrVFQLphmuLKTfsBKVKodV/UhcC+ufjw5F qN1hrT7ndhFppAxdURuR8iKPtKuC7UlUK36CK4Kz2NSz7NA1DyM3eQExEV/43seeRBtf 1l7sV/H32jJXW/qIMIQSyUFnm9RyeSX8XmVN+gwVavul8DG59RusrxUPsuMMftbcLaaF UaEGdXQFgi2RUbtG66q1o/3FxUA+jiMHzYd9eMoTqP8OlvcIGVKkH8DcxAQd7uSU1yb/ o1lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=OnpMDbAGT3435SYeG/PuiMkkIvduYtBcbEfOdwrgav0=; b=BSM0WIFmbYNNirUZ6xE2vVRsb1Tzq182EoD1FZJQKazZt1R66+1UeWsCgr4rBLbyaa GPqnXGLV6keCyEkvW0XdF86YN/1WouOr4sncvS6qM1Kne52kYDfWjigYLRoAK65qrFOa Me0bqWy/ZPXZ7xgTz7lLfZOhnCgu2oudYK7Nfwl0zJcDNCg/Tv88O80l8XvEMF0RE+nQ +EZ/qs857qsT1/QXHZBXh5qgKOndyzBPpA+9kHk7bVShwdqTEN8G4eFv2DIwbmMDUBTo lVjW60scbiP1Tn3vHFn2rnkY/BgremgJNYWDuc8SiK7wZNCUiCMk04mH3WjrVM3FN7Yv IRXw== X-Gm-Message-State: AJIora9JtXXNXVP6kpGd3W2lu1p+jMXL1jaRJETpBTZkCwPry3AMZ7uZ tNZiI+UpsUABSjQTO9U1MW0yFQ== X-Google-Smtp-Source: AGRyM1tyP9orVFNQ9fmvaHaNYa9Y6U90Ur/dnqX1+fl4Omo5jXLdi9XiVLpuregqAemcxeF2RKiqGg== X-Received: by 2002:ac2:4ec7:0:b0:48a:c05b:d408 with SMTP id p7-20020ac24ec7000000b0048ac05bd408mr1105880lfr.588.1659097318515; Fri, 29 Jul 2022 05:21:58 -0700 (PDT) Received: from localhost (91-154-92-55.elisa-laajakaista.fi. [91.154.92.55]) by smtp.gmail.com with ESMTPSA id r22-20020ac25f96000000b0048a74608f16sm635414lfe.308.2022.07.29.05.21.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Jul 2022 05:21:57 -0700 (PDT) From: Jarkko Sakkinen To: Paolo Bonzini Cc: Jarkko Sakkinen , Jarkko Sakkinen , Harald Hoyer , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)), "H. Peter Anvin" , kvm@vger.kernel.org (open list:KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)), linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)) Subject: [PATCH v2] KVM: SVM: Dump Virtual Machine Save Area (VMSA) to klog Date: Fri, 29 Jul 2022 15:21:50 +0300 Message-Id: <20220729122150.601-1-jarkko@profian.com> X-Mailer: git-send-email 2.37.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" As Virtual Machine Save Area (VMSA) is essential in troubleshooting attestation, dump it to the klog with the KERN_DEBUG level of priority. Cc: Jarkko Sakkinen Suggested-by: Harald Hoyer Signed-off-by: Jarkko Sakkinen --- arch/x86/kvm/svm/sev.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 0c240ed04f96..c91a905436d5 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -603,6 +603,10 @@ static int sev_es_sync_vmsa(struct vcpu_svm *svm) save->xss =3D svm->vcpu.arch.ia32_xss; save->dr6 =3D svm->vcpu.arch.dr6; =20 + if (printk_ratelimit()) { + print_hex_dump(KERN_DEBUG, "VMSA", DUMP_PREFIX_NONE, 16, 1, save, sizeof= (*save), false); + } + return 0; } =20 --=20 v2: - Use KERN_DEBUG for print_hex_dump() - Check for ratelimit. 2.37.1