Thank you.

Roger Pau Monné <roger....@citrix.com> schrieb am Do., 19. Juli 2018, 11:50:

> On Thu, Jul 19, 2018 at 11:42:24AM +0200, Gerd Hafenbrack wrote:
> > Hello,
> >
> > Roger Pau Monné <roy...@freebsd.org> schrieb am Do., 19. Juli 2018,
> 11:05:
> >
> > > ... Later on, we sadly discovered
> > > that PVHv1 was still too similar to classic PV, and didn't allow Xen
> > > to make use of all the possible hardware virtualization extensions, so
> > > PVHv2 was introduced ~2 years ago ...
> > >
> >
> > Is there a page comparing hardware virtualization extensions between
> PVHv1
> > and PVHv2?
>
> Hm, not really. PVHv2 has some devices (either emulated by software or
> hardware) that are not present on PVHv1: LAPIC, IO-APIC. The way to
> setup and inject interrupts on PVHv2 is also the same as on native
> (IO-APIC pin, MSI or MSI-X).
>
> Also PVHv2 allows to change paging modes (or completely disable
> paging), which PVHv1 didn't allow at all.
>
> To sum up, PVHv2 is very, very similar to HVM but it doesn't require a
> QEMU device model in order to run.
>
> > What about AMD support? We are getting EPIC machines.
>
> Yes, PVHv2 supports AMD, although I have to admit I haven't done
> extensive testing on AMD due to my lack of AMD hardware. I expect
> that's going to change soon.
>
> I've tested PVHv2 FreeBSD DomUs on AMD hardware, but I haven't tested
> FreeBSD PVHv2 Dom0 on AMD yet.
>
> Roger.
>
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