On Mon, Jan 25, 2010 at 01:12:36PM +0200, Avi Kivity wrote:
> On 01/25/2010 01:11 PM, Gleb Natapov wrote:
> >On Mon, Jan 25, 2010 at 01:08:13PM +0200, Avi Kivity wrote:
> >>On 01/25/2010 12:01 PM, Gleb Natapov wrote:
> >>>On HW task switch newly loaded segments should me marked as accessed.
> >>>
> >>>@@ -4775,6 +4766,11 @@ int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
> >>> kvm_seg.unusable = 1;
> >>>
> >>> kvm_set_segment(vcpu,&kvm_seg, seg);
> >>>+ if (selector&& !kvm_seg.unusable&& kvm_seg.s) {
> >>>+ /* mark segment as accessed */
> >>>+ seg_desc.type |= 1;
> >>>+ save_guest_segment_descriptor(vcpu, selector,&seg_desc);
> >>>+ }
> >>> return 0;
> >>> }
> >>What about an error return from s_g_s_d?
> >>
> >What can or should we do about it?
> >
>
> If -EFAULT, propagate to userspace.
>
We don't handle it anywhere in task switch emulation. Separate patch?
--
Gleb.
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