Disabling PCI "hot-unplug" for a guest (and/or a single PCI device)

[Michael S. Tsirkin]

On Tue, Feb 04, 2020 at 05:13:54PM +0100, Julia Suvorova wrote:
> On Tue, Feb 4, 2020 at 11:26 AM Michael S. Tsirkin <mst at redhat.com> wrote:
> >
> > On Mon, Feb 03, 2020 at 05:19:51PM -0500, Laine Stump wrote:
> > > 3) qemu could add a "hotpluggable=no" commandline option to all PCI devices
> > > (including vfio-pci) and then do whatever is necessary to make sure this is
> > > honored in the emulated hardware (is it possible to set this on a per-slot
> > > basis in a PCI controller? Or must it be done for an entire controller?
> >
> > I think it's possible on a per-slot basis, yes.
> 
> There's a "Hot-Plug Capable" option in Slot Capability register, so we
> can switch it off. But it's only for pcie devices, can't say anything
> about conventional pci.
> 
> Best regards, Julia Suvorova.

For conventional PCI, we can drop SHPC capability and remove
the eject method from ACPI.