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This patch provides qemu support for the contents of <model> in <controller> for the two existing PCI controller types that need it (i.e. the two controller types that are backed by a device that must be specified on the qemu commandline): 1) pci-bridge - sets <model> name attribute default as "pci-bridge" 2) dmi-to-pci-bridge - sets <model> name attribute default as "i82801b11-bridge". These both match current hardcoded practice. The defaults are set at the end of qemuDomainAssignPCIAddresses(). This can't be done earlier because some of the options that will be autogenerated need full PCI address info for the controller, and because qemuDomainAssignPCIAddresses() might create extra controllers which would need default settings added, and that hasn't yet been done at the time the PostParse callbacks are being run. qemuDomainAssignPCIAddresses() is still called prior to the XML being written to disk, though, so the autogenerated defaults are persistent. qemu capabilities bits aren't checked when the domain is defined, but rather when the commandline is actually created (so the domain can possibly be defined on a host that doesn't yet have support for the given device, or a host different from the one where it will eventually be run). When the commandline is being generated we compare the modelName to known qemu device names implementing the given type of controller, and check the capabilities bit for that device.
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>