Re: [PATCH] Add I/O hypercalls for i386 paravirt

Rusty Russell
2007-08-23T05:35:48Z

On Wed, 2007-08-22 at 22:25 +0100, Alan Cox wrote:
> > I still think it's preferable to change some drivers than everybody.
> >
> > AFAIK BusLogic as real hardware is pretty much dead anyways,
> > so you're probably the only primary user of it anyways.
> > Go wild on it!
>
> I don't believe anyone is materially maintaining the buslogic driver and
> in time its going to break completely.
>
> > Well that might be. I just think it would be a mistake
> > to design paravirt_ops based on someone's short term release engineering
> > considerations.
>
> Agreed, especially as an interface where each in or out traps into the
> hypervisor is broken even for the model of virtualising hardware.

I'd really like lguest guests not to do ins and outs, but that's likely
to be more invasive a change than this. We do it to find the PCI bus
IIRC, and a couple of other early probe bits.

It's just unfortunate that it's the one place lguest has to emulate
because of lack of paravirt_ops coverage.

Rusty.