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| author | Avi Kivity <avi@redhat.com> | 2012-08-21 17:07:02 +0300 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2012-08-27 20:02:20 -0300 |
| commit | 495e116684cebc5ae625916aba37fc07f345707b (patch) | |
| tree | a7478c30a118a490b2ba1e9bac0c6c7af0bea24e /arch/x86/kvm | |
| parent | c865c43de66dc973865bda337022f03b6e16c8df (diff) | |
| download | op-kernel-dev-495e116684cebc5ae625916aba37fc07f345707b.zip op-kernel-dev-495e116684cebc5ae625916aba37fc07f345707b.tar.gz | |
KVM: VMX: Allow real mode emulation using vm86 with dpl=0
Real mode is always entered from protected mode with dpl=0. Since
the dpl doesn't affect execution, and we already override it to 3
in the vmcs (as vmx requires), we can allow execution in that state.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 88eeb40..4811d91 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -3317,7 +3317,7 @@ static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) return false; if (var.limit != 0xffff) return false; - if (ar != 0xf3) + if ((ar | (3 << AR_DPL_SHIFT)) != 0xf3) return false; return true; |
