Signed-off-by: Avi Kivity <[email protected]>
---
arch/x86/kvm/emulate.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index a114fa9..d7d95de 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -83,6 +83,7 @@
#define Group (1<<14) /* Bits 3:5 of modrm byte extend opcode */
#define GroupDual (1<<15) /* Alternate decoding of mod == 3 */
/* Misc flags */
+#define Force64 (1<<24) /* Force operand size to 64 bits in 64-bit mode */
#define Undefined (1<<25) /* No Such Instruction */
#define Lock (1<<26) /* lock prefix is allowed for the instruction */
#define Priv (1<<27) /* instruction generates #GP if current CPL != 0 */
@@ -2398,7 +2399,7 @@ done_prefixes:
return -1;
}
- if (mode == X86EMUL_MODE_PROT64 && (c->d & Stack))
+ if (mode == X86EMUL_MODE_PROT64 && (c->d & (Stack | Force64)))
c->op_bytes = 8;
/* ModRM and SIB bytes. */
--
1.7.1
--
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