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PCI devices on PCI to PCI bridges stopped being accessable from Xen with QEMU 2.3.0
The change set:
commit 3996e85c1822e05c50250f8d2d1e57b6bea1229d
Author: Paul Durrant <email address hidden>
Date: Tue Jan 20 11:06:19 2015 +0000
Xen: Use the ioreq-server API when available
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Added calls to xen_map_pcidev() when available. However these call are only done at startup, not when the guest configures the PCI to PCI bridge. So Xen 4.5.0 (which has these) using a QEMU 2.3.0 or later can no longer access PCI devices that are not on a root bridge.
Since Xen's tool stack does not know about PCI to PCI bridges, a config that shows this issue also requires the correct Linux kernel argument "pci=assign-busses" is used.
Looking through old bug tickets... can you still reproduce this issue with the latest version of QEMU? Or could we close this ticket nowadays?
[Expired for QEMU because there has been no activity for 60 days.]
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