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

From: Michael S. Tsirkin
Subject: Re: Disabling PCI "hot-unplug" for a guest (and/or a single PCI device)
Date: Tue, 4 Feb 2020 11:35:37 -0500

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 <address@hidden> 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.

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