Re: [PATCH v2] hw/i386: disable smbus migration for xenfv

[Paolo Bonzini]

On 17/01/20 10:22, Olaf Hering wrote:
> Am Thu, 16 Jan 2020 19:26:39 +0100
> schrieb Paolo Bonzini <address@hidden>:
> 
>> My understanding is that Xen is able to use "-M
>> pc-i440fx-VERSION,accel=xen".  The presence of the version in the
>> machine type guarantees that the migration stream is compatible and that
>> the hardware exposed to the guest is the same on the source and destination.
> 
> It seems 'xenfv' is not a 'pc-i440fx-X.X', even with accel=xen.
> The "xen-platform" will not be created and as a result no PV driver can be 
> used.

Just add "-device xen-platform" to the command line.

> I do not know what a 'xenfv' is supposed to be, and how it is supposed to
> behave compatible for all existing and future guests.

It's nothing more than a synonym for "-machine pc -device xen-platform
-accel xen" (plus some magic to support igd passthrough, which we could
and should move to the pc machine type as well).  It doesn't even try to
be compatible for all existing and future guests.

Paolo

signature.asc
Description: OpenPGP digital signature