linux-kernel - [PATCH 2/3] KVM: AMD SVM: handle MSR

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Date:	Wed, 13 Dec 2006 12:44:56 -0000
From:	Avi Kivity <avi@...ranet.com>
To:	kvm-devel@...ts.sourceforge.net
Cc:	linux-kernel@...r.kernel.org, akpm@...l.org, mingo@...e.hu
Subject: [PATCH 2/3] KVM: AMD SVM: handle MSR_STAR in 32-bit mode

This is necessary for linux guests.

Signed-off-by: Avi Kivity <avi@...ranet.com>

Index: linux-2.6/drivers/kvm/svm.c
===================================================================
--- linux-2.6.orig/drivers/kvm/svm.c
+++ linux-2.6/drivers/kvm/svm.c
@@ -402,11 +402,11 @@ static __init int svm_hardware_setup(voi
 	set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1);
 	set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1);
 	set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1);
-	set_msr_interception(msrpm_va, MSR_STAR, 1, 1);
 	set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1);
 	set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1);
 	set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1);
 #endif
+	set_msr_interception(msrpm_va, MSR_K6_STAR, 1, 1);
 	set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1);
 	set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
 	set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
@@ -1098,10 +1098,10 @@ static int svm_get_msr(struct kvm_vcpu *
 	case MSR_IA32_APICBASE:
 		*data = vcpu->apic_base;
 		break;
-#ifdef CONFIG_X86_64
-	case MSR_STAR:
+	case MSR_K6_STAR:
 		*data = vcpu->svm->vmcb->save.star;
 		break;
+#ifdef CONFIG_X86_64
 	case MSR_LSTAR:
 		*data = vcpu->svm->vmcb->save.lstar;
 		break;
@@ -1173,10 +1173,10 @@ static int svm_set_msr(struct kvm_vcpu *
 	case MSR_IA32_APICBASE:
 		vcpu->apic_base = data;
 		break;
-#ifdef CONFIG_X86_64_
-	case MSR_STAR:
+	case MSR_K6_STAR:
 		vcpu->svm->vmcb->save.star = data;
 		break;
+#ifdef CONFIG_X86_64_
 	case MSR_LSTAR:
 		vcpu->svm->vmcb->save.lstar = data;
 		break;
-
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