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

[Laine Stump]

On 4/17/20 12:35 PM, Ani Sinha wrote:
> +Laine
>
> > On Apr 17, 2020, at 9:39 PM, Michael S. Tsirkin <address@hidden> wrote:
> >
> > 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.
>
> Hmm. I see. We use conventional PCI and hence was looking for providing this 
> feature for conventional PCI only. Laine might be able to throw some lights as 
> to feasibility of the in PCIE world.

Sorry, my knowledge doesn't go that low. If there's a qemu option I can 
expose it in libvirt, but am by no means an expert of qemu internals or 
the pci/pcie specs :-)

(BTW, I think in the past people have prevented enabling hot-unplug by 
unprivileged users in Windows with some sort of a "system policy" in 
Windows. (whatever that is - I don't use Windows, and have just heard 
this from others when discussing the problem).