kvm, emulator: Use opcode length

Add a field to the current emulation context which contains the
instruction opcode length. This will streamline handling of opcodes of
different length.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 3d1e3ee8b39e..d00d88455fef 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4789,8 +4789,8 @@ static void inject_emulated_exception(struct kvm_vcpu *vcpu)
 
 static void init_decode_cache(struct x86_emulate_ctxt *ctxt)
 {
-        memset(&ctxt->twobyte, 0,
-               (void *)&ctxt->_regs - (void *)&ctxt->twobyte);
+        memset(&ctxt->opcode_len, 0,
+               (void *)&ctxt->_regs - (void *)&ctxt->opcode_len);
 
         ctxt->fetch.start = 0;
         ctxt->fetch.end = 0;