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=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 84F72C169C4 for ; Sun, 3 Feb 2019 14:25:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 527F62084A for ; Sun, 3 Feb 2019 14:25:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730976AbfBCOZs (ORCPT ); Sun, 3 Feb 2019 09:25:48 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:55662 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730319AbfBCOVE (ORCPT ); Sun, 3 Feb 2019 09:21:04 -0500 Received: from cable-78.29.236.164.coditel.net ([78.29.236.164] helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1gqIdq-0006O3-OT; Sun, 03 Feb 2019 14:21:02 +0000 Received: from ben by deadeye with local (Exim 4.92-RC4) (envelope-from ) id 1gqI9u-0007Rr-LG; Sun, 03 Feb 2019 14:50:06 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, Denis Kirjanov , "Radim =?UTF-8?Q?Kr=C4=8Dm=C3=A1=C5=99?=" , "Ladi Prosek" Date: Sun, 03 Feb 2019 14:45:08 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 293/305] KVM: x86: Add MSR_AMD64_DC_CFG to the list of ignored MSRs In-Reply-To: X-SA-Exim-Connect-IP: 78.29.236.164 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.63-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Ladi Prosek commit 405a353a0e20d09090ad96147da6afad9b0ce056 upstream. Hyper-V writes 0x800000000000 to MSR_AMD64_DC_CFG when running on AMD CPUs as recommended in erratum 383, analogous to our svm_init_erratum_383. By ignoring the MSR, this patch enables running Hyper-V in L1 on AMD. Signed-off-by: Ladi Prosek Signed-off-by: Radim Krčmář Signed-off-by: Ben Hutchings --- arch/x86/kvm/x86.c | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2085,6 +2085,7 @@ int kvm_set_msr_common(struct kvm_vcpu * case MSR_VM_HSAVE_PA: case MSR_AMD64_PATCH_LOADER: case MSR_AMD64_BU_CFG2: + case MSR_AMD64_DC_CFG: break; case MSR_EFER: @@ -2462,6 +2463,7 @@ int kvm_get_msr_common(struct kvm_vcpu * case MSR_FAM10H_MMIO_CONF_BASE: case MSR_AMD64_BU_CFG2: case MSR_IA32_PERF_CTL: + case MSR_AMD64_DC_CFG: msr_info->data = 0; break; case MSR_P6_PERFCTR0: