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| author | Avi Kivity <avi@redhat.com> | 2012-08-21 17:07:10 +0300 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2012-08-27 20:02:21 -0300 |
| commit | a81aba14dc0ea499f4c218b5db0303b2ea8151d3 (patch) | |
| tree | ee2394f2db2507661eadcf0a6f4c7e1097395540 | |
| parent | ce5668034752e52e995c8dc625337380099a088a (diff) | |
| download | linux-a81aba14dc0ea499f4c218b5db0303b2ea8151d3.tar.bz2 | |
KVM: VMX: Ignore segment G and D bits when considering whether we can virtualize
We will enter the guest with G and D cleared; as real hardware ignores D in
real mode, and G is taken care of by the limit test, we allow more code to
run in vm86 mode.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| -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 62b2d0cf2a7f..248c2b490e9b 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -3320,7 +3320,7 @@ static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg) return false; if (var.limit < 0xffff) return false; - if ((ar | (3 << AR_DPL_SHIFT)) != 0xf3) + if (((ar | (3 << AR_DPL_SHIFT)) & ~(AR_G_MASK | AR_DB_MASK)) != 0xf3) return false; return true; |