diff options
| author | Avi Kivity <avi@redhat.com> | 2012-08-21 16:07:02 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2012-08-28 01:02:20 +0200 |
| commit | 495e116684cebc5ae625916aba37fc07f345707b (patch) | |
| tree | a7478c30a118a490b2ba1e9bac0c6c7af0bea24e /arch | |
| parent | KVM: VMX: Retain limit and attributes when entering protected mode (diff) | |
| download | linux-495e116684cebc5ae625916aba37fc07f345707b.tar.xz linux-495e116684cebc5ae625916aba37fc07f345707b.zip | |
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')
| -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 88eeb405560f..4811d91759a1 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; |