Messages in this thread | | | Date | Tue, 29 Oct 2013 08:23:30 +0000 | From | "Jan Beulich" <> | Subject | Re: [v1 1/2] xen/p2m: Create identity mappings for PFNs beyound E820 and PCI BARs |
| |
>>> On 28.10.13 at 17:58, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote: > On Fri, Oct 25, 2013 at 04:08:19PM -0600, Bjorn Helgaas wrote: >> If you can look at PCI host bridge apertures instead of BARs, that >> would solve both problems. Reassigning those apertures is >> theoretically possible but is not even a gleam in our eyes yet. > > <nods> I think I have to have both (BARs and host bridge apertures) as when > we do PCI passthrough to a guest - we might do it without a bridge.
Why? Aren't the host bridge ranges necessarily a superset of the individual devices' BARs?
Jan
| |