On Mon, 2016-08-08 at 15:33 -0400, Laine Stump wrote:
Marcel - is this actually supported by qemu? Yes, and if doesn't work is a bug. The best way to think of pxb/pbx-pcie is that it exposes a new pcie.0 like bus. The only difference is that you cannot have devices plugged
Doesn't https://bugzilla.redhat.com/1363648#c4 tell us that we *need* to use a pcie-root-port when plugging stuff into a pcie-expander-bus? No, I think you're misunderstanding Marcel's comment: (In reply to Laine Stump from comment #2) directly into it (integrated device). I specifically asked him if what the reporter attempted (plugging a dmi-to-pci-bridge directly into a pcie-expander-bus) was supported, and he said "yes". He then said that the only difference is that you can't plug [endpoint] devices directly into it. A dmi-to-pci-bridge is not an endpoint device. Aside from endpoint devices, the only other things you are supposed to plug into pcie-root are pcie-root-ports and dmi-to-pci-bridges.
The "endpoint" part is the one I was missing. It makes sense now :) -- Andrea Bolognani / Red Hat / Virtualization