[libvirt] pci device passthrough: Failed to assign irq
guan qin
qinguan0619 at gmail.com
Wed May 4 13:25:17 UTC 2011
I also check the VM dmesg ,it shows that "Failed to initialize MSI
interrupts. Falling back to legacy interrupts."
more detail information please look into the picture attached.
best regards,
qinguan
2011/5/4 guan qin <qinguan0619 at gmail.com>
> Hi,
>
> I encounter a problem that the eth can't be up in the VM by using VT-d.
> I boot the VM using "virsh create vt_d.xml".
> The VM could recongize the NIC which was assigned .then I do in VM as
> follows:
> #cat /sys/class/net/eth0/operstate
> down
> #ifconfig eth0 up
> #cat /sys/class/net/eth0/operstate
> down
> #ficonfig eth 10.100.0.5
> #cat /sys/class/net/eth0/operstate
> down
>
> I look into the qemu log file ,find that :
>
> LC_ALL=C PATH=/usr/local/sbin:/usr/
> local/bin:/sbin:/bin:/usr/sbin:/usr/bin HOME=/ QEMU_AUDIO_DRV=none
> /usr/bin/kvm -S -M pc-0.12 -enable-kvm -m 512 -smp
> 1,sockets=1,cores=1,threads=1 -name vt_d_5 -uuid
> 05f608a3-f64f-2418-a90a-d611982c8336 -nodefaults -chardev
> socket,id=monitor,path=/var/lib/libvirt/qemu/vt_d_5.monitor,server,nowait
> -mon chardev=monitor,mode=readline -rtc base=utc -boot c -drive
> file=/home/qinguan/exp/kvm_vtd/ubuntu_1.img,if=none,id=drive-virtio-disk0,boot=on,format=raw
> -device
> virtio-blk-pci,bus=pci.0,addr=0x3,drive=drive-virtio-disk0,id=virtio-disk0
> -usb -device usb-mouse,id=input0 -vnc 127.0.0.1:0 -vga cirrus -device
> pci-assign,host=00:19.0,id=hostdev0,bus=pci.0,addr=0x4 -device
> virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
> Failed to assign irq for "hostdev0": Operation not permitted
> Perhaps you are assigning a device that shares an IRQ with another device?
> Failed to assign irq for "hostdev0": Operation not permitted
> Perhaps you are assigning a device that shares an IRQ with another device?
> Failed to assign irq for "hostdev0": Operation not permitted
> Perhaps you are assigning a device that shares an IRQ with another device?
> Failed to assign irq for "hostdev0": Operation not permitted
> Perhaps you are assigning a device that shares an IRQ with another device?
> Failed to assign irq for "hostdev0": Operation not permitted
>
> maybe the VM can't access to the network because of Failed to assign irg
> for "hostdev0"?
>
> in kern.log :
> May 1 12:40:07 Optiplex-780 kernel: [ 3172.784803] e1000e 0000:00:19.0:
> PCI INT A disabled
> May 1 12:40:07 Optiplex-780 kernel: [ 3172.784863] pci-stub 0000:00:19.0:
> claimed by stub
> May 1 12:40:07 Optiplex-780 kernel: [ 3173.103965] pci-stub 0000:00:19.0:
> PCI INT A -> GSI 21 (level, low) -> IRQ 21
> May 1 12:40:07 Optiplex-780 kernel: [ 3173.204030] pci-stub 0000:00:19.0:
> restoring config space at offset 0x6 (was 0x1, writing 0xece1)
> May 1 12:40:07 Optiplex-780 kernel: [ 3173.204035] pci-stub 0000:00:19.0:
> restoring config space at offset 0x5 (was 0x0, writing 0xf7ad9000)
> May 1 12:40:07 Optiplex-780 kernel: [ 3173.204039] pci-stub 0000:00:19.0:
> restoring config space at offset 0x4 (was 0x0, writing 0xf7ae0000)
> May 1 12:40:07 Optiplex-780 kernel: [ 3173.204045] pci-stub 0000:00:19.0:
> restoring config space at offset 0x1 (was 0x100000, writing 0x100103)
> May 1 12:40:07 Optiplex-780 kernel: [ 3173.435751] assign device 0:0:19.0
> May 1 12:44:24 Optiplex-780 kernel: [ 3430.568526] pci-stub 0000:00:19.0:
> restoring config space at offset 0x6 (was 0x1, writing 0xece1)
> May 1 12:44:24 Optiplex-780 kernel: [ 3430.568532] pci-stub 0000:00:19.0:
> restoring config space at offset 0x5 (was 0x0, writing 0xf7ad9000)
> May 1 12:44:24 Optiplex-780 kernel: [ 3430.568537] pci-stub 0000:00:19.0:
> restoring config space at offset 0x4 (was 0x0, writing 0xf7ae0000)
> May 1 12:44:24 Optiplex-780 kernel: [ 3430.568543] pci-stub 0000:00:19.0:
> restoring config space at offset 0x1 (was 0x100000, writing 0x100103)
> May 1 12:44:24 Optiplex-780 kernel: [ 3430.568561] pci-stub 0000:00:19.0:
> PCI INT A disabled
>
>
> root at Optiplex-780:/var/log/libvirt/qemu# cat /proc/interrupts
> CPU0 CPU1 CPU2 CPU3
> 0: 97 1 2 1 IO-APIC-edge timer
> 1: 2 0 0 0 IO-APIC-edge i8042
> 7: 0 0 0 0 IO-APIC-edge
> parport0
> 8: 1 0 0 0 IO-APIC-edge rtc0
> 9: 0 0 0 0 IO-APIC-fasteoi acpi
> 12: 1 2 1 0 IO-APIC-edge i8042
> 16: 0 0 0 0 IO-APIC-fasteoi
> uhci_hcd:usb2
> 17: 5822 1952 3614 2233 IO-APIC-fasteoi
> uhci_hcd:usb4, uhci_hcd:usb7
> 18: 0 0 0 0 IO-APIC-fasteoi
> uhci_hcd:usb8
> 22: 1 1 1 0 IO-APIC-fasteoi
> ehci_hcd:usb1, uhci_hcd:usb5
> 23: 1461 1299 1153 912 IO-APIC-fasteoi
> ehci_hcd:usb3, uhci_hcd:usb6
> 24: 268579 0 0 0 HPET_MSI-edge hpet2
> 25: 0 286310 0 0 HPET_MSI-edge hpet3
> 26: 0 0 210675 0 HPET_MSI-edge hpet4
> 27: 0 0 0 256688 HPET_MSI-edge hpet5
> 29: 1 0 0 0 DMAR_MSI-edge dmar1
> 30: 0 0 0 0 DMAR_MSI-edge dmar0
> 31: 0 0 0 0 DMAR_MSI-edge dmar2
> 35: 0 0 0 1 PCI-MSI-edge eth1
> 36: 1456 916 1323 1657 PCI-MSI-edge
> eth1-rx-0
> 37: 1031 772 1459 895 PCI-MSI-edge
> eth1-rx-1
> 38: 958 965 785 470 PCI-MSI-edge
> eth1-rx-2
> 39: 1319 557 1007 714 PCI-MSI-edge
> eth1-rx-3
> 40: 892 864 417 1134 PCI-MSI-edge
> eth1-tx-0
> 41: 414 749 998 606 PCI-MSI-edge
> eth1-tx-1
> 42: 307 921 375 332 PCI-MSI-edge
> eth1-tx-2
> 43: 966 693 396 502 PCI-MSI-edge
> eth1-tx-3
> 54: 7109 5755 5683 5609 PCI-MSI-edge ahci
> 55: 74 105 73 84 PCI-MSI-edge
> hda_intel
> 56: 1446 927 1108 870 PCI-MSI-edge i915
> NMI: 0 0 0 0 Non-maskable interrupts
> LOC: 740 725 703 677 Local timer interrupts
> SPU: 0 0 0 0 Spurious interrupts
> PMI: 0 0 0 0 Performance monitoring
> interrupts
> PND: 0 0 0 0 Performance pending work
> RES: 665 679 714 547 Rescheduling interrupts
> CAL: 5332 408 5619 539 Function call interrupts
> TLB: 1880 2843 1788 3202 TLB shootdowns
> TRM: 0 0 0 0 Thermal event interrupts
> THR: 0 0 0 0 Threshold APIC
> interrupts
> MCE: 0 0 0 0 Machine check exceptions
> MCP: 5 5 5 5 Machine check polls
> ERR: 3
> MIS: 0
> root at Optiplex-780:/var/log/libvirt/qemu#
>
> I search the similarly problems that sharing the irg but never find a
> answer , and now I have no idea.
> How to solve the problem ,can you help me ? thanks.
>
>
> best regards,
> qinguan
>
>
>
> vt_d.xml:
> <domain type='kvm'>
> <name>test</name>
> <description>just test using sriov!</description>
> <os>
> <type>hvm</type>
> <boot dev='hd'/>
> </os>
> <memory>524288</memory>
> <currentMemory>524288</
> currentMemory>
> <on_poweroff>destroy</on_poweroff>
> <on_reboot>restart</on_reboot>
> <on_crash>restart</on_crash>
>
> <features><pae/><acpi/><apic/></features>
> <clock offset='utc'/>
> <devices>
> <input type='mouse' bus='usb'/>
> <disk type='file' device='disk'>
> <source file='/home/qinguan/exp/ubuntu_1.img'/>
> <target dev='hda' bus='virtio'/>
> </disk>
> <emulator>/usr/bin/kvm</emulator>
> <graphics type='vnc' port='-1'/>
> <hostdev mode='subsystem' type='pci' managed='yes'>
> <source>
> <address bus='0x0' slot='0x19' function='0x0'/>
> </source>
> </hostdev>
> </devices>
> </domain>
>
>
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