From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: KVM: x86: report valid microcode update ID Date: Fri, 29 Jul 2011 19:44:21 -0300 Message-ID: <20110729224421.GA25444@amt.cnet> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Gleb Natapov To: kvm Return-path: Received: from mx1.redhat.com ([209.132.183.28]:63069 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752815Ab1G2Wo2 (ORCPT ); Fri, 29 Jul 2011 18:44:28 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p6TMiSj8026768 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Fri, 29 Jul 2011 18:44:28 -0400 Content-Disposition: inline Sender: kvm-owner@vger.kernel.org List-ID: Windows Server 2008 SP2 checked build with smp > 1 BSOD's during boot due to lack of microcode update: *** Assertion failed: The system BIOS on this machine does not properly support the processor. The system BIOS did not load any microcode update. A BIOS containing the latest microcode update is needed for system reliability. (CurrentUpdateRevision != 0) *** Source File: d:\longhorn\base\hals\update\intelupd\update.c, line 440 Report a non-zero microcode update signature to make it happy. Signed-off-by: Marcelo Tosatti diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e80f0d7..f435591 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1841,7 +1841,6 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) switch (msr) { case MSR_IA32_PLATFORM_ID: - case MSR_IA32_UCODE_REV: case MSR_IA32_EBL_CR_POWERON: case MSR_IA32_DEBUGCTLMSR: case MSR_IA32_LASTBRANCHFROMIP: @@ -1862,6 +1861,9 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) case MSR_FAM10H_MMIO_CONF_BASE: data = 0; break; + case MSR_IA32_UCODE_REV: + data = 0x100000000ULL; + break; case MSR_MTRRcap: data = 0x500 | KVM_NR_VAR_MTRR; break;