From: Anthony Liguori <[email protected]>
Add vmmcall/vmcall to x86_emulate. Future patch will implement functionality
for these instructions.
Signed-off-by: Anthony Liguori <[email protected]>
Signed-off-by: Avi Kivity <[email protected]>
---
drivers/kvm/x86_emulate.c | 23 +++++++++++++++++------
1 files changed, 17 insertions(+), 6 deletions(-)
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index bd46de6..84af9cc 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -1380,6 +1380,12 @@ twobyte_insn:
u16 size;
unsigned long address;
+ case 0: /* vmcall */
+ if (modrm_mod != 3 || modrm_rm != 1)
+ goto cannot_emulate;
+
+ /* nop */
+ break;
case 2: /* lgdt */
rc = read_descriptor(ctxt, ops, src.ptr,
&size, &address, op_bytes);
@@ -1387,12 +1393,17 @@ twobyte_insn:
goto done;
realmode_lgdt(ctxt->vcpu, size, address);
break;
- case 3: /* lidt */
- rc = read_descriptor(ctxt, ops, src.ptr,
- &size, &address, op_bytes);
- if (rc)
- goto done;
- realmode_lidt(ctxt->vcpu, size, address);
+ case 3: /* lidt/vmmcall */
+ if (modrm_mod == 3 && modrm_rm == 1) {
+ /* nop */
+ } else {
+ rc = read_descriptor(ctxt, ops, src.ptr,
+ &size, &address,
+ op_bytes);
+ if (rc)
+ goto done;
+ realmode_lidt(ctxt->vcpu, size, address);
+ }
break;
case 4: /* smsw */
if (modrm_mod != 3)
--
1.5.3.7
--
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