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Re: [Qemu-devel] About hotplug multifunction

From: Isaku Yamahata
Subject: Re: [Qemu-devel] About hotplug multifunction
Date: Tue, 13 Sep 2011 14:57:20 +0900
User-agent: Mutt/1.5.19 (2009-01-05)

On Sun, Sep 11, 2011 at 12:05:17PM +0300, Michael S. Tsirkin wrote:
> On Sat, Sep 10, 2011 at 02:43:11AM +0900, Isaku Yamahata wrote:
> > pci/pcie hot plug needs clean up for multifunction hotplug in long term.
> > Only single function device case works. Multifunction case is broken 
> > somwehat.
> > Especially the current acpi based hotplug should be replaced by
> > the standardized hot plug controller in long term.
> We'll need to keep supporting windows XP, which IIUC only
> supports hotplug through ACPI. So it looks like we'll
> need both.

Yes, we'll need both then.
It would be possible to implement acpi-based hotplug with
standardized hotplug controller. Not with qemu-specific controller.

It would require a bit amount of work to write ACPI code in DSDT that
handles standardized hotplug controller.
So I'm not sure it's worth while only for windows XP support.

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