Re: [libvirt] [Qemu-devel] [RFC] qmp: query-device-slots command
On Thu, Dec 15, 2016 at 02:15:51PM -0500, Laine Stump wrote:
On 12/15/2016 05:12 AM, Marcel Apfelbaum wrote:
> On 12/14/2016 10:10 PM, Laine Stump wrote:
> > On 12/14/2016 12:17 PM, Marcel Apfelbaum wrote:
> > > Be aware that 1 slot doesn't necessarily refer to only one device,
> > > we can have a multi-function device.
> >
> > Is that a fixed thing? I mean, is it always possible to use all 8
> > functions of a slot (assuming no hotplug of course)?
> >
>
> Yes, you simply add to the function 0 on command line: with -device
> ...,multifunction=on.
Yes, I know how the commandline works. my question is whether *all* PCI
controllers in existence have 8 usable functions per slot, or if that might
be another thing that is different from one controller to the next (and thus
would have to be reported in these query responses).
That's a good question. From looking at the code, I was assuming
the 8 functions were always available. But if they might be not,
that's another reason to explicitly report PCI functions in the
new queries.
--
Eduardo