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https://gitlab.com/libvirt/libvirt.git
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4d100c7a41
Hand-entering indexes for 20 PCI controllers is not as tedious as manually determining and entering their PCI addresses, but it's still annoying, and the algorithm for determining the proper index is incredibly simple (in all cases except one) - just pick the lowest unused index. The one exception is USB2 controllers because multiple controllers in the same group have the same index. For these we look to see if 1) the most recently added USB controller is also a USB2 controller, and 2) the group *that* controller belongs to doesn't yet have a controller of the exact model we're just now adding - if both are true, the new controller gets the same index, but in all other cases we just assign the lowest unused index. With this patch in place and combined with the automatic PCI address assignment, we can define a PCIe switch with several ports like this: <controller type='pci' model='pcie-root-port'/> <controller type='pci' model='pcie-switch-upstream-port'/> <controller type='pci' model='pcie-switch-downstream-port'/> <controller type='pci' model='pcie-switch-downstream-port'/> <controller type='pci' model='pcie-switch-downstream-port'/> <controller type='pci' model='pcie-switch-downstream-port'/> <controller type='pci' model='pcie-switch-downstream-port'/> ... These will each get a unique index, and PCI addresses that connect them together appropriately with no pesky numbers required.
154 lines
7.0 KiB
XML
154 lines
7.0 KiB
XML
<domain type='qemu'>
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<name>q35-test</name>
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<uuid>11dbdcdd-4c3b-482b-8903-9bdb8c0a2774</uuid>
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<memory unit='KiB'>2097152</memory>
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<currentMemory unit='KiB'>2097152</currentMemory>
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<vcpu placement='static' cpuset='0-1'>2</vcpu>
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<os>
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<type arch='x86_64' machine='q35'>hvm</type>
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<boot dev='hd'/>
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</os>
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<clock offset='utc'/>
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>restart</on_reboot>
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<on_crash>destroy</on_crash>
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<devices>
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<emulator>/usr/libexec/qemu-kvm</emulator>
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<disk type='block' device='disk'>
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<source dev='/dev/HostVG/QEMUGuest1'/>
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<target dev='sda' bus='sata'/>
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<address type='drive' controller='0' bus='0' target='0' unit='0'/>
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</disk>
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<controller type='pci' index='0' model='pcie-root'/>
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<controller type='pci' index='1' model='dmi-to-pci-bridge'>
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<model name='i82801b11-bridge'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1e' function='0x0'/>
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</controller>
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<controller type='pci' index='2' model='pci-bridge'>
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<model name='pci-bridge'/>
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<target chassisNr='2'/>
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<address type='pci' domain='0x0000' bus='0x01' slot='0x00' function='0x0'/>
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</controller>
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<controller type='pci' index='3' model='pcie-root-port'>
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<model name='ioh3420'/>
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<target chassis='3' port='0x10'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
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</controller>
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<controller type='pci' index='4' model='pcie-switch-upstream-port'>
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<model name='x3130-upstream'/>
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<address type='pci' domain='0x0000' bus='0x03' slot='0x00' function='0x0'/>
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</controller>
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<controller type='pci' index='5' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='5' port='0x0'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x00' function='0x0'/>
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</controller>
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<controller type='pci' index='6' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='6' port='0x1'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x01' function='0x0'/>
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</controller>
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<controller type='pci' index='7' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='7' port='0x2'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x02' function='0x0'/>
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</controller>
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<controller type='pci' index='8' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='8' port='0x3'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x03' function='0x0'/>
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</controller>
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<controller type='pci' index='9' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='9' port='0x4'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x04' function='0x0'/>
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</controller>
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<controller type='pci' index='10' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='10' port='0x5'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x05' function='0x0'/>
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</controller>
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<controller type='pci' index='11' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='11' port='0x6'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x06' function='0x0'/>
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</controller>
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<controller type='pci' index='12' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='12' port='0x7'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x07' function='0x0'/>
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</controller>
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<controller type='pci' index='13' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='13' port='0x8'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x08' function='0x0'/>
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</controller>
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<controller type='pci' index='14' model='pcie-switch-downstream-port'>
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<model name='xio3130-downstream'/>
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<target chassis='14' port='0x9'/>
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<address type='pci' domain='0x0000' bus='0x04' slot='0x09' function='0x0'/>
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</controller>
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<controller type='usb' index='0' model='ich9-ehci1'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x7'/>
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</controller>
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<controller type='usb' index='0' model='ich9-uhci1'>
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<master startport='0'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x0' multifunction='on'/>
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</controller>
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<controller type='usb' index='0' model='ich9-uhci2'>
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<master startport='2'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x1'/>
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</controller>
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<controller type='usb' index='0' model='ich9-uhci3'>
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<master startport='4'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1d' function='0x2'/>
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</controller>
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<controller type='usb' index='1' model='ich9-ehci1'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1a' function='0x7'/>
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</controller>
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<controller type='usb' index='1' model='ich9-uhci1'>
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<master startport='0'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1a' function='0x0' multifunction='on'/>
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</controller>
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<controller type='usb' index='2' model='ich9-uhci1'>
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<master startport='0'/>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x0' multifunction='on'/>
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</controller>
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<controller type='usb' index='2' model='ich9-uhci2'>
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<master startport='2'/>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x1'/>
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</controller>
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<controller type='usb' index='2' model='ich9-uhci3'>
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<master startport='4'/>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x2'/>
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</controller>
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<controller type='usb' index='2' model='ich9-ehci1'>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x01' function='0x7'/>
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</controller>
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<controller type='usb' index='3' model='nec-xhci'>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x02' function='0x0'/>
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</controller>
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<controller type='usb' index='4' model='ich9-uhci1'>
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<master startport='0'/>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x03' function='0x0' multifunction='on'/>
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</controller>
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<controller type='usb' index='4' model='ich9-uhci2'>
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<master startport='2'/>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x03' function='0x1'/>
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</controller>
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<controller type='usb' index='4' model='ich9-uhci3'>
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<master startport='4'/>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x03' function='0x2'/>
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</controller>
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<controller type='usb' index='4' model='ich9-ehci1'>
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<address type='pci' domain='0x0000' bus='0x02' slot='0x03' function='0x7'/>
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</controller>
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<controller type='sata' index='0'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
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</controller>
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<input type='mouse' bus='ps2'/>
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<input type='keyboard' bus='ps2'/>
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<memballoon model='none'/>
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</devices>
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</domain>
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