From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754215AbbKLKNW (ORCPT ); Thu, 12 Nov 2015 05:13:22 -0500 Received: from mail.skyhub.de ([78.46.96.112]:42130 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753644AbbKLKNU (ORCPT ); Thu, 12 Nov 2015 05:13:20 -0500 Date: Thu, 12 Nov 2015 11:13:17 +0100 From: Borislav Petkov To: Paolo Bonzini Cc: =?utf-8?B?SsO2cmcgUsO2ZGVs?= , kvm ML , lkml Subject: Shut up unhandled MSR warnings Message-ID: <20151112101317.GA3649@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hey Paolo, do we apply stuff like that below? When booting guests all the time here, dmesg gets filled up with those "unhandled rdmsr" useless warnings. The patch below shuts them up. The only problem is that the IC CFG MSR has those fields defined starting from F15h and I don't see a way to check the family/model/stepping of the guest CPU in kvm. Is there? Thanks. --- diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index b8c14bb7fc8f..08b880818fb9 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -315,6 +315,7 @@ #define MSR_F15H_PERF_CTR 0xc0010201 #define MSR_F15H_NB_PERF_CTL 0xc0010240 #define MSR_F15H_NB_PERF_CTR 0xc0010241 +#define MSR_F15H_IC_CFG 0xc0011021 /* Fam 10h MSRs */ #define MSR_FAM10H_MMIO_CONF_BASE 0xc0010058 diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 4a70fc6d400a..1d76dcdf7e55 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -665,9 +665,9 @@ static void init_amd_bd(struct cpuinfo_x86 *c) * Disable it on the affected CPUs. */ if ((c->x86_model >= 0x02) && (c->x86_model < 0x20)) { - if (!rdmsrl_safe(0xc0011021, &value) && !(value & 0x1E)) { + if (!rdmsrl_safe(MSR_F15H_IC_CFG, &value) && !(value & 0x1E)) { value |= 0x1E; - wrmsrl_safe(0xc0011021, value); + wrmsrl_safe(MSR_F15H_IC_CFG, value); } } } diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 2f9ed1ff0632..7948cdeacbfe 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3141,6 +3141,9 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) case MSR_IA32_UCODE_REV: msr_info->data = 0x01000065; break; + case MSR_F15H_IC_CFG: + msr_info->data = 0x1E; + break; default: return kvm_get_msr_common(vcpu, msr_info); } -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply.