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KVM: SVM: handle errors in vmrun emulation path appropriatly 

If nested svm fails to load the msrpm the vmrun succeeds with the old
msrpm which is not correct. This patch changes the logic to roll back
to host mode in case the msrpm cannot be loaded.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Joerg Roedel 2009-08-07 11:49:43 +02:00 committed by Avi Kivity
parent ea8e064fe2
commit 1f8da47805
1 changed files with 13 additions and 1 deletions
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14
arch/x86/kvm/svm.c
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@ -1874,6 +1874,7 @@ static int vmsave_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
static int vmrun_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
{
nsvm_printk("VMrun\n");
if (nested_svm_check_permissions(svm))
return 1;
@ -1884,7 +1885,18 @@ static int vmrun_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
return 1;
if (!nested_svm_vmrun_msrpm(svm))
return 1;
goto failed;
return 1;
failed:
svm->vmcb->control.exit_code = SVM_EXIT_ERR;
svm->vmcb->control.exit_code_hi = 0;
svm->vmcb->control.exit_info_1 = 0;
svm->vmcb->control.exit_info_2 = 0;
nested_svm_vmexit(svm);
return 1;
}