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| author | Avi Kivity <avi@redhat.com> | 2012-08-21 17:07:08 +0300 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2012-08-27 20:02:21 -0300 |
| commit | 1390a28b274e2e45f89bac67c435cbcbc5cc0790 (patch) | |
| tree | 622d33f371a22b1aa351cc81d7510f2415a7ab9b | |
| parent | 726364202853f843a97a8ba4a7c3cd91e3aa84b7 (diff) | |
| download | linux-1390a28b274e2e45f89bac67c435cbcbc5cc0790.tar.gz linux-1390a28b274e2e45f89bac67c435cbcbc5cc0790.tar.bz2 linux-1390a28b274e2e45f89bac67c435cbcbc5cc0790.zip | |
KVM: VMX: Preserve segment limit and access rights in real mode
While this is undocumented, real processors do not reload the segment
limit and access rights when loading a segment register in real mode.
Real programs rely on it so we need to comply with this behaviour.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 0d6872621ab5..6e6421aeca03 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -3113,6 +3113,9 @@ static void vmx_get_segment(struct kvm_vcpu *vcpu, if (seg == VCPU_SREG_TR || var->selector == vmx_read_guest_seg_selector(vmx, seg)) return; + var->base = vmx_read_guest_seg_base(vmx, seg); + var->selector = vmx_read_guest_seg_selector(vmx, seg); + return; } var->base = vmx_read_guest_seg_base(vmx, seg); var->limit = vmx_read_guest_seg_limit(vmx, seg); |