Re: [PATCH/RFC 4/9] Basic guest virtualdevices infrastructure

Dor Laor
2007-05-14T12:00:16Z

>Avi Kivity wrote:
>> Interesting. We could use a variation this for x86 as well, but I'm
not
>> sure how easy it is to integrate it into closed source OSes
(Windows).
>> The diag instruction could be replaced by a hypercall which would
make
>> the code generic.
>I think we need to freeze the hypercall API at some time, and consider
>it a stable kernel external API. We do then need to document these
>calls, and non-GPL hypervisors can implement it. We could eventually
>have a similar situation with one of the other non-GPL hypervisors on
>s390 that run Linux.

I think Avi meant using a virtual bus as an option for HVMs too (windows
especially). Currently we're using the cpi bus. Using a new virtualized
bus might be a good idea, it's easy & clean for open source. The
question is it make life easier for HVMs. For instance, on windows we'll
need Pnp support for these devices.