* Anthony Liguori wrote:
> Amit Shah wrote:
> > * Anthony Liguori wrote:
> >
> >
> >> This patch refactors the current hypercall infrastructure to better
> >> support live migration and SMP. It eliminates the hypercall page by
> >> trapping the UD exception that would occur if you used the wrong
> >> hypercall instruction for the underlying architecture and replacing it
> >> with the right one lazily.
> >
> > This doesn't work right for SVM. It keeps looping indefinitely; on a
> > kvm_stat run, I get about 230,000 light vm exits per second, with the
> > hypercall never returning to the guest.
> >
> > ...
> >
>
> What are you using to issue the hypercall?
+ r = kvm_hypercall1(KVM_PV_PCI_DEVICE, page_gfn);
Setup is done by:
+ if (!kvm_para_available()) {
+ printk(KERN_ERR "KVM paravirt support not available\n");
+ r = -ENODEV;
+ goto out_dereg;
+ }
I also couldn't get the has_feature to work properly.
See:
http://lkml.org/lkml/2007/11/7/129
I had to change the hypercall address to 0f 01 d9 for it to get working.
>
> Regards,
>
> Anthony Liguori
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