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If q35 machine type is detected the slot of the pci device is set to 0
and the bus to pci_id + 1.
Q35 models uses pcie-root-ports to attach PCI devices. Each PCI port is
selected by the bus parameter of the PCI address and it that does not accept a
slot number greater than 0.
Example:
A VM with 2 X710 VFs is defined OpenNebula as:
PCI=[
ADDRESS="0000:44:0a:0",
BUS="44",
CLASS="0200",
DEVICE="154c",
DOMAIN="0000",
FUNCTION="0",
NUMA_NODE="0",
PCI_ID="0",
SHORT_ADDRESS="44:0a.0",
SLOT="0a",
VENDOR="8086",
VM_ADDRESS="01:00.0",
VM_BUS="0x01",
VM_DOMAIN="0x0000",
VM_FUNCTION="0",
VM_SLOT="0000" ]
PCI=[
ADDRESS="0000:44:0a:1",
BUS="44",
CLASS="0200",
DEVICE="154c",
DOMAIN="0000",
FUNCTION="1",
NUMA_NODE="0",
PCI_ID="1",
SHORT_ADDRESS="44:0a.1",
SLOT="0a",
VENDOR="8086",
VM_ADDRESS="02:00.0",
VM_BUS="0x02",
VM_DOMAIN="0x0000",
VM_FUNCTION="0",
VM_SLOT="0000" ]
Each PCI VFs is attached to different pcie-root-port, selected with the
VM_BUS parameter:
00:02.0 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
00:02.1 PCI bridge: Red Hat, Inc. QEMU PCIe Root port
The PCI topology is:
-[0000:00]-+-00.0 Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller
+-01.0 Cirrus Logic GD 5446
+-02.0-[01]----00.0 Intel Corporation Ethernet Virtual Function 700 Series
+-02.1-[02]----00.0 Intel Corporation Ethernet Virtual Function 700 Series
+-02.2-[03-04]----00.0-[04]--
+-02.3-[05]----00.0 Red Hat, Inc. Virtio network device
+-02.4-[06]----00.0 Red Hat, Inc. Virtio SCSI
+-02.5-[07]----00.0 Red Hat, Inc. QEMU XHCI Host Controller
+-02.6-[08]----00.0 Red Hat, Inc. Virtio console
+-02.7-[09]----00.0 Red Hat, Inc. Virtio memory balloon
+-03.0-[0a]--
+-03.1-[0b]--
+-03.2-[0c]--
+-03.3-[0d]--
+-03.4-[0e]--
+-03.5-[0f]--
+-03.6-[10]--
+-03.7-[11]--
+-1f.0 Intel Corporation 82801IB (ICH9) LPC Interface Controller
+-1f.2 Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA Controller [AHCI mode]
\-1f.3 Intel Corporation 82801I (ICH9 Family) SMBus Controller
4ce7340381