diff options
| author | Avi Kivity <avi@redhat.com> | 2009-12-02 12:28:47 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2009-12-03 09:34:20 +0200 |
| commit | d5696725b2a4c59503f5e0bc33adeee7f30cd45b (patch) | |
| tree | 56069b502c198fbfef0eb0d9bd3a2329b3d37cef /arch/x86/include | |
| parent | f50146bd7bdb75435638e60d4960edd9bcdf88b8 (diff) | |
KVM: VMX: Fix comparison of guest efer with stale host value
update_transition_efer() masks out some efer bits when deciding whether
to switch the msr during guest entry; for example, NX is emulated using the
mmu so we don't need to disable it, and LMA/LME are handled by the hardware.
However, with shared msrs, the comparison is made against a stale value;
at the time of the guest switch we may be running with another guest's efer.
Fix by deferring the mask/compare to the actual point of guest entry.
Noted by Marcelo.
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 06e085614da..4f865e8b854 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -812,6 +812,6 @@ int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu); int kvm_cpu_get_interrupt(struct kvm_vcpu *v); void kvm_define_shared_msr(unsigned index, u32 msr); -void kvm_set_shared_msr(unsigned index, u64 val); +void kvm_set_shared_msr(unsigned index, u64 val, u64 mask); #endif /* _ASM_X86_KVM_HOST_H */ |