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1e15be1bbc
When support for the pcie-root and dmi-to-pci-bridge buses on a Q35 machinetype was added, I was concerned that even though qemu at the time allowed plugging a PCI device into a PCIe port, that it might not be supported in the future. To prevent painful backtracking in the possible future where this happened, I disallowed such connections except in a few specific cases requested by qemu developers (indicated in the code with the flag VIR_PCI_CONNECT_TYPE_EITHER_IF_CONFIG). Now that a couple years have passed, there is a clear message from qemu that there is no danger in allowing PCI devices to be plugged into PCIe ports. This patch eliminates VIR_PCI_CONNECT_TYPE_EITHER_IF_CONFIG and changes the code to always allow PCI->PCIe or PCIe->PCI connection *when the PCI address is specified in the config. (For newly added devices that haven't yet been given a PCI address, the auto-placement still prefers using the correct type of bus).
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>