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tuner23
Tux's lil' helper
Joined: 18 May 2006
Posts: 82
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 Posted: Sat Jun 04, 2011 7:08 pm Post subject: [solved] Problems assigning HW to VMs with PCI-Passthrough |
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Hy,
i have some problems assigning two network-cards on to different VMs with kvm.
What i do:
1. Remapping the devices:
| Code: | #!/bin/bash
##
## 06:02.0 Ethernet controller: D-Link System Inc DGE-528T Gigabit Ethernet Adapter (rev 10)
## 06:02.0 0200: 1186:4300 (rev 10)
## 06:03.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
## 06:03.0 0200: 10ec:8139 (rev 10)
## External interface
echo "10ec 8139" > /sys/bus/pci/drivers/pci-stub/new_id
echo "0000:06:03.0" > /sys/bus/pci/devices/0000:06:03.0/driver/unbind
echo "0000:06:03.0" > /sys/bus/pci/drivers/pci-stub/bind
echo "10ec 8139" > /sys/bus/pci/drivers/pci-stub/remove_id
## Internal interface
echo "1186 4300" > /sys/bus/pci/drivers/pci-stub/new_id
echo "0000:06:02.0" > /sys/bus/pci/devices/0000:06:02.0/driver/unbind
echo "0000:06:02.0" > /sys/bus/pci/drivers/pci-stub/bind
echo "1186 4300" > /sys/bus/pci/drivers/pci-stub/remove_id
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2. Starting the VMs
| Code: | # qemu-kvm -enable-kvm -drive file=/vms/prod/fw/fw.iso,if=virtio,boot=on -m 512 -smp 1 -curses -kernel /data/kernels/vmlinuz-2.6.36-gentoo-r8 -append "root=/dev/vda" -net nic,model=virtio,macaddr=DE:AD:DE:EF:2D:AD -net tap,ifname=tapfw0,script=/etc/qemu/qemu-ifup -device pci-assign,host=06:03.0
# qemu-kvm -enable-kvm -drive file=/vms/prod/res/res.iso,if=virtio,boot=on -m 512 -smp 1 -curses -kernel /data/kernels/vmlinuz-2.6.36-gentoo-r8 -append "root=/dev/vda" -net nic,model=virtio,macaddr=DE:AD:DE:EF:2D:AE -net tap,ifname=tapres0,script=/etc/qemu/qemu-ifup -device pci-assign,host=06:02.0
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When i boot only one of them every network card works.
Every time i boot both, one of them is disabled (the one i booted first).
What is the problem here? I don't think that i can only assign devices to one virtual machine..
When i do a ping on the machine where the network doesn't work anymore, i get the following output on the other:
| Code: | res ~ # tcpdump -i eth0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
23:01:39.432173 00:00:00:00:00:00 (oui Ethernet) > 49:4e:81:a4:02:02 (oui Unknown) Null Information, send seq 0, rcv seq 0, Flags [Command], length 84
...
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Some data:
| Code: | moffat bin # cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7
0: 533162 0 0 0 0 0 0 0 IO-APIC-edge timer
1: 64 0 0 0 0 0 0 0 IO-APIC-edge i8042
4: 10 0 0 0 0 0 0 0 IO-APIC-edge serial
8: 79 0 0 0 0 0 0 0 IO-APIC-edge rtc0
9: 0 0 0 0 0 0 0 0 IO-APIC-fasteoi acpi
16: 26 0 0 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb1
21: 2783 0 0 0 0 0 0 0 IO-APIC-fasteoi kvm:0000:06:02.0
22: 5165 0 0 0 0 0 0 0 IO-APIC-fasteoi kvm:0000:06:03.0
23: 122 0 0 0 0 0 0 0 IO-APIC-fasteoi ehci_hcd:usb2
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| Code: | moffat bin # cat /proc/ioports
0000-0cf7 : PCI Bus 0000:00
...
e000-efff : PCI Bus 0000:06
e080-e0ff : 0000:06:05.0
e400-e4ff : 0000:06:03.0
e400-e4ff : kvm_assigned_device
e800-e8ff : 0000:06:02.0
e800-e8ff : kvm_assigned_device
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| Code: | moffat bin # cat /proc/dma
4: cascade
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Have someone an idea what i am doing wrong in this case?
Thx in advance,
Antonios.
Last edited by tuner23 on Mon Jun 13, 2011 5:21 pm; edited 1 time in total |
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tuner23
Tux's lil' helper
Joined: 18 May 2006
Posts: 82
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| Posted: Mon Jun 13, 2011 5:20 pm Post subject: |
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Ok,
the problem is that i can not passthrough PCI-slots, to multiple virtual machines when i have not a Mainboard with PCI-express and the cards are not PCI-express.
It's defined in the specification of VT-d.
Now with (new) PCIe-cards it works.
greets. |
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