qemu virtio device behind pci bridge

qemu virtio device behind pci bridge

qemu virtio device behind pci bridge

QEMU command line

qemu-system-x86_64 \
    -enable-kvm \
    -bios OVMF.fd \
    -smp sockets=1,cpus=4,cores=2 -cpu host \
    -m 1024 \
    -vga none -nographic \
    -netdev user,id=mynet0,hostfwd=tcp::${VMN}0022-:22,hostfwd=tcp::${VMN}2375-:2375 \
    -device virtio-net-pci,netdev=mynet0 \
    -drive file=./test.img,if=none,id=drive-virtio-disk0,format=raw -device virtio-blk-pci,scsi=off,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=0 \
    -device pci-bridge,id=pci_bridge1,bus=pci.0,chassis_nr=1 \
    -drive file=./test2.img,if=none,id=drive-virtio-disk1,format=raw -device virtio-blk-pci,bus=pci_bridge1,addr=1,scsi=off,drive=drive-virtio-disk1,id=virtio-disk1,bootindex=1 \

Output of lspci in the VM

root@clr-ee7ec07225414e78b8eac15839a3b0c4 ~ # lspci -v
00:00.0 Host bridge: Intel Corporation 440FX - 82441FX PMC [Natoma] (rev 02)
        Subsystem: Red Hat, Inc Qemu virtual machine
        Flags: bus master, fast devsel, latency 0

00:01.0 ISA bridge: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II]
        Subsystem: Red Hat, Inc Qemu virtual machine
        Flags: bus master, medium devsel, latency 0

00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] (prog-if 80 [Master])
        Subsystem: Red Hat, Inc Qemu virtual machine
        Flags: bus master, medium devsel, latency 0
        [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8]
        [virtual] Memory at 000003f0 (type 3, non-prefetchable)
        [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8]
        [virtual] Memory at 00000370 (type 3, non-prefetchable)
        I/O ports at 0000

00:01.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 03)
        Subsystem: Red Hat, Inc Qemu virtual machine
        Flags: bus master, medium devsel, latency 0, IRQ 9

00:02.0 Ethernet controller: Red Hat, Inc Virtio network device
        Subsystem: Red Hat, Inc Device 0001
        Flags: bus master, fast devsel, latency 0, IRQ 11
        I/O ports at d040 [size=32]
        Memory at 80102000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at <ignored> [disabled]
        Capabilities: [40] MSI-X: Enable+ Count=3 Masked-
        Kernel driver in use: virtio-pci

00:03.0 SCSI storage controller: Red Hat, Inc Virtio block device
        Subsystem: Red Hat, Inc Device 0002
        Flags: bus master, fast devsel, latency 0, IRQ 10
        I/O ports at d000 [size=64]
        Memory at 80101000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [40] MSI-X: Enable+ Count=2 Masked-
        Kernel driver in use: virtio-pci

00:04.0 PCI bridge: Red Hat, Inc. QEMU PCI-PCI bridge (prog-if 00 [Normal decode])
        Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10
        Memory at 80100000 (64-bit, non-prefetchable) [size=256]
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: 0000c000-0000cfff [size=4K]
        Memory behind bridge: 80000000-800fffff [size=1M]
        Prefetchable memory behind bridge: None
        Capabilities: [4c] MSI: Enable- Count=1/1 Maskable+ 64bit+
        Capabilities: [48] Slot ID: 0 slots, First+, chassis 01
        Capabilities: [40] Hot-plug capable

01:01.0 SCSI storage controller: Red Hat, Inc Virtio block device
        Subsystem: Red Hat, Inc Device 0002
        Flags: bus master, fast devsel, latency 0, IRQ 11
        I/O ports at c000 [size=64]
        Memory at 80000000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [40] MSI-X: Enable+ Count=2 Masked-
        Kernel driver in use: virtio-pci