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KVM: SVM: Sync all control registers on nested vmexit

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Currently the vmexit emulation does not sync control
registers were the access is typically intercepted by the
nested hypervisor. But we can not count on that intercepts
to sync these registers too and make the code
architecturally more correct.

Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

(Cherry-picked from commit cdbbdc1210)
This commit is contained in:
Joerg Roedel
2010-02-19 16:23:03 +01:00
committed by Greg Kroah-Hartman
parent c9c1db0b52
commit 663dc3bf05
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kvm/svm.c
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@@ -1647,9 +1647,13 @@ static int nested_svm_vmexit(struct vcpu_svm *svm)
nested_vmcb->save.ds = vmcb->save.ds;
nested_vmcb->save.gdtr = vmcb->save.gdtr;
nested_vmcb->save.idtr = vmcb->save.idtr;
nested_vmcb->save.cr0 = kvm_read_cr0(&svm->vcpu);
if (npt_enabled)
nested_vmcb->save.cr3 = vmcb->save.cr3;
else
nested_vmcb->save.cr3 = svm->vcpu.arch.cr3;
nested_vmcb->save.cr2 = vmcb->save.cr2;
nested_vmcb->save.cr4 = svm->vcpu.arch.cr4;
nested_vmcb->save.rflags = vmcb->save.rflags;
nested_vmcb->save.rip = vmcb->save.rip;
nested_vmcb->save.rsp = vmcb->save.rsp;