* Avi Kivity wrote:
> Amit Shah wrote:
> > * Anthony Liguori wrote:
> >
> >
> >> Amit Shah wrote:
> >>
> >>
> >> 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;
> > + }
> >
>
> There was a bug where instructions with a modrm byte specifying a
> register would try to access memory. In the memory was not mapped,
> emulation would fail. vmcall is one such instruction. This was fixed by
>
> commit f83562246921d6a8a7de8b76853a6835ace3699d
> Author: Aurelien Jarno <[email protected]>
> Date: Wed Oct 17 19:30:41 2007 +0200
>
> KVM: x86 emulator: fix access registers for instructions with ModR/M
> byte and Mod = 3
Thanks, and thank you, Aurelien!
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