Re: [PATCH] Add a new PIIX option to control PCI hot unplugging of devices on non-root buses

[Daniel P . Berrangé]

On Fri, Apr 17, 2020 at 12:09:00PM -0400, Michael S. Tsirkin wrote:
> On Fri, Apr 17, 2020 at 03:36:14PM +0000, Ani Sinha wrote:
> > 
> > 
> > > On Apr 17, 2020, at 8:57 PM, Michael S. Tsirkin <address@hidden> wrote:
> > > 
> > > Is there a real reason to do this? Can't we just limit the
> > > hotplug control to pcie ports? At some point I'd like us to
> > > start leaving piix alone..
> > 
> > Yes we really need this feature as want to be able to hot plug devices into 
> > the guest but prevent customers from hot unplugging them from say Windows 
> > system tray.
> > 
> > ani
> 
> Problem is, I think this is not something we can support with pcie or shpc.
> I'm reluctant to add features that only ACPI can support,
> we are trying to phase that out.

>From the upstream POV, there's been no decision / agreement to phase
out PIIX, this is purely a RHEL downstream decision & plan. If other
distros / users have a different POV, and find the feature useful, we
should accept the patch if it meets the normal QEMU patch requirements.

Regards,
Daniel
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