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KVM: emulate: simplify writeback

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The "if/return" checks are useless, because we return X86EMUL_CONTINUE
anyway if we do not return.

Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2014-04-01 13:23:24 +02:00
parent 54cfdb3e95
commit f5f87dfbc7
1 changed files with 11 additions and 17 deletions
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28
arch/x86/kvm/emulate.c
View file

@ -1588,34 +1588,28 @@ static void write_register_operand(struct operand *op)
static int writeback(struct x86_emulate_ctxt *ctxt, struct operand *op)
{
int rc;
switch (op->type) {
case OP_REG:
write_register_operand(op);
break;
case OP_MEM:
if (ctxt->lock_prefix)
rc = segmented_cmpxchg(ctxt,
return segmented_cmpxchg(ctxt,
op->addr.mem,
&op->orig_val,
&op->val,
op->bytes);
else
return segmented_write(ctxt,
op->addr.mem,
&op->orig_val,
&op->val,
op->bytes);
else
rc = segmented_write(ctxt,
op->addr.mem,
&op->val,
op->bytes);
if (rc != X86EMUL_CONTINUE)
return rc;
break;
case OP_MEM_STR:
rc = segmented_write(ctxt,
op->addr.mem,
op->data,
op->bytes * op->count);
if (rc != X86EMUL_CONTINUE)
return rc;
return segmented_write(ctxt,
op->addr.mem,
op->data,
op->bytes * op->count);
break;
case OP_XMM:
write_sse_reg(ctxt, &op->vec_val, op->addr.xmm);