[libvirt] [PATCH] pci: Ignore 32-bit PCIe domains

[Keith Busch]

On Mon, Mar 19, 2018 at 12:21:35PM +0000, Daniel P. Berrangé wrote:
> On Fri, Mar 16, 2018 at 11:39:36AM -0600, Keith Busch wrote:
> > Intel VMD creates secondary PCIe domain, where child devices in this
> > domain are aggregated behind a single end point. Linux exposes these
> > as special 32-bit domains, and devices in them are not individually
> > assignable.
> 
> IIUC, your patch is addressing a problem for machines with a
> specific Intel PCIe device type.
> 
> Is this  "domain >= USHRT_MAX" scenario specific to just this
> Intel PCIe device type, or will such a high domain number indicate
> the same semantics for devices from any vendor.

Yes, there is no other vendor exporting multiple PCI domains that isn't
tied to a platform sepcific 16-bit PCI _SEG.