Re: [Qemu-devel] [RFC QEMU PATCH v3 00/10] Implement vNVDIMM for Xen HVM guest

[Michael S. Tsirkin]

On Fri, Oct 13, 2017 at 03:46:39PM -0700, Stefano Stabellini wrote:
> On Fri, 13 Oct 2017, Jan Beulich wrote:
> > >>> On 13.10.17 at 13:13, <address@hidden> wrote:
> > > To Jan, Andrew, Stefano and Anthony,
> > > 
> > > what do you think about allowing QEMU to build the entire guest ACPI
> > > and letting SeaBIOS to load it? ACPI builder code in hvmloader is
> > > still there and just bypassed in this case.
> > 
> > Well, if that can be made work in a non-quirky way and without
> > loss of functionality, I'd probably be fine. I do think, however,
> > that there's a reason this is being handled in hvmloader right now.
> 
> And not to discourage you, just as a clarification, you'll also need to
> consider backward compatibility: unless the tables are identical, I
> imagine we'll have to keep using the old tables for already installed
> virtual machines.

Maybe you can handle this using machine type versioning.
Installed guests would use the old type.

-- 
MST