KVM: x86 emulator: Add flag to check for protected mode instructions
This patch adds a flag for the opcoded to tag instruction
which are only recognized in protected mode. The necessary
check is added too.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 4822824..3f32a66 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -78,6 +78,7 @@
#define Prefix (1<<16) /* Instruction varies with 66/f2/f3 prefix */
#define Sse (1<<17) /* SSE Vector instruction */
/* Misc flags */
+#define Prot (1<<21) /* instruction generates #UD if not in prot-mode */
#define VendorSpecific (1<<22) /* Vendor specific instruction */
#define NoAccess (1<<23) /* Don't access memory (lea/invlpg/verr etc) */
#define Op3264 (1<<24) /* Operand is 64b in long mode, 32b otherwise */
@@ -3143,6 +3144,12 @@
goto done;
}
+ /* Instruction can only be executed in protected mode */
+ if ((c->d & Prot) && !(ctxt->mode & X86EMUL_MODE_PROT)) {
+ rc = emulate_ud(ctxt);
+ goto done;
+ }
+
/* Do instruction specific permission checks */
if (c->check_perm) {
rc = c->check_perm(ctxt);