[libvirt PATCH 5/6] qemu: probe for "acpi-index" property

[Daniel P. Berrangé]

On Tue, Apr 06, 2021 at 08:27:07PM +0200, Igor Mammedov wrote:
> On Tue,  6 Apr 2021 16:31:36 +0100
> Daniel P. Berrangé <berrange at redhat.com> wrote:
> 
> > This property is exposed by QEMU on any PCI device, but we have to pick
> > some specific device(s) to probe it against. We expect that at least one
> > of the virtio devices will be present, so probe against them.
> 
> Would it be useful to expose capability with MachineInfo in QAPI schema?

I dont think it really belongs with MachineInfo, as it is a device
property. The issue is really that QEMU has a class hierarchy, but
the QMP device info flattens this, to avoid exposing the existance
of the class hierarchy for devices.

> At least with this on QEMU side I can imagine a crude check and error out
> in case device has acpi-index set but machine doesn't support it.

Any improved error checking in QEMU is welcome if i detects configs
that cannot possibly work due to missing support, as libvirt doesn't
really want to check every possible scenario itself.

Regards,
Daniel
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