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KVM: x86 emulator: tighen up ->read_std() and ->write_std() error checks 

Instead of checking for X86EMUL_PROPAGATE_FAULT, check for any error,
making the callers more reliable.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity 2010-11-22 17:53:24 +02:00
parent 42438e364c
commit db297e3d8e
1 changed files with 8 additions and 8 deletions
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16
arch/x86/kvm/emulate.c
View File

@ -1915,7 +1915,7 @@ static int task_switch_16(struct x86_emulate_ctxt *ctxt,
ret = ops->read_std(old_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
&ctxt->exception);
if (ret == X86EMUL_PROPAGATE_FAULT)
if (ret != X86EMUL_CONTINUE)
/* FIXME: need to provide precise fault address */
return ret;
@ -1923,13 +1923,13 @@ static int task_switch_16(struct x86_emulate_ctxt *ctxt,
ret = ops->write_std(old_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
&ctxt->exception);
if (ret == X86EMUL_PROPAGATE_FAULT)
if (ret != X86EMUL_CONTINUE)
/* FIXME: need to provide precise fault address */
return ret;
ret = ops->read_std(new_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
&ctxt->exception);
if (ret == X86EMUL_PROPAGATE_FAULT)
if (ret != X86EMUL_CONTINUE)
/* FIXME: need to provide precise fault address */
return ret;
@ -1940,7 +1940,7 @@ static int task_switch_16(struct x86_emulate_ctxt *ctxt,
&tss_seg.prev_task_link,
sizeof tss_seg.prev_task_link,
ctxt->vcpu, &ctxt->exception);
if (ret == X86EMUL_PROPAGATE_FAULT)
if (ret != X86EMUL_CONTINUE)
/* FIXME: need to provide precise fault address */
return ret;
}
@ -2049,7 +2049,7 @@ static int task_switch_32(struct x86_emulate_ctxt *ctxt,
ret = ops->read_std(old_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
&ctxt->exception);
if (ret == X86EMUL_PROPAGATE_FAULT)
if (ret != X86EMUL_CONTINUE)
/* FIXME: need to provide precise fault address */
return ret;
@ -2057,13 +2057,13 @@ static int task_switch_32(struct x86_emulate_ctxt *ctxt,
ret = ops->write_std(old_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
&ctxt->exception);
if (ret == X86EMUL_PROPAGATE_FAULT)
if (ret != X86EMUL_CONTINUE)
/* FIXME: need to provide precise fault address */
return ret;
ret = ops->read_std(new_tss_base, &tss_seg, sizeof tss_seg, ctxt->vcpu,
&ctxt->exception);
if (ret == X86EMUL_PROPAGATE_FAULT)
if (ret != X86EMUL_CONTINUE)
/* FIXME: need to provide precise fault address */
return ret;
@ -2074,7 +2074,7 @@ static int task_switch_32(struct x86_emulate_ctxt *ctxt,
&tss_seg.prev_task_link,
sizeof tss_seg.prev_task_link,
ctxt->vcpu, &ctxt->exception);
if (ret == X86EMUL_PROPAGATE_FAULT)
if (ret != X86EMUL_CONTINUE)
/* FIXME: need to provide precise fault address */
return ret;
}