Commit b6744dc3 authored by Avi Kivity's avatar Avi Kivity Committed by Marcelo Tosatti
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KVM: x86 emulator: introduce NoWrite flag



Instead of disabling writeback via OP_NONE, just specify NoWrite.
Acked-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarAvi Kivity <avi.kivity@gmail.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent b7d491e7
......@@ -151,6 +151,7 @@
#define Unaligned ((u64)1 << 42) /* Explicitly unaligned (e.g. MOVDQU) */
#define Avx ((u64)1 << 43) /* Advanced Vector Extensions */
#define Fastop ((u64)1 << 44) /* Use opcode::u.fastop */
#define NoWrite ((u64)1 << 45) /* No writeback */
#define X2(x...) x, x
#define X3(x...) X2(x), x
......@@ -1633,6 +1634,9 @@ static int writeback(struct x86_emulate_ctxt *ctxt)
{
int rc;
if (ctxt->d & NoWrite)
return X86EMUL_CONTINUE;
switch (ctxt->dst.type) {
case OP_REG:
write_register_operand(&ctxt->dst);
......
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