KVM: x86 emulator: VM86 segments must have DPL 3

Setting the segment DPL to 0 for at least the VM86 code segment makes
the VM entry fail on VMX.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index fa310a4..b19e9ff 100644 (file)
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1244,6 +1244,8 @@ static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt,
                seg_desc.type = 3;
                seg_desc.p = 1;
                seg_desc.s = 1;
+               if (ctxt->mode == X86EMUL_MODE_VM86)
+                       seg_desc.dpl = 3;
                goto load;
        }