于 2011年05月03日 15:38, guan qin 写道:
Thanks a lot for your reply sincerely! Actually ,if I do as what http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM said,: " # echo "8086 10b9" > /sys/bus/pci/drivers/pci-stub/new_id # echo 0000:01:00.0 > /sys/bus/pci/devices/0000:01:00.0/driver/unbind # echo 0000:01:00.0 > /sys/bus/pci/drivers/pci-stub/bind " Then I can assign a NIC to the VM ,and the VM also can use the NIC to access the network. But , according the libvirt guide that http://libvirt.org/formatdomain.html#elementsUSB shows: " When |managed| is "yes" for a PCI device, it is detached from the host before being passed on to the guest. " So should I still "unbind " the device from the host OS driver first ? If that ,What's the "detached" meaning ? thanks. best regards, qinguan
libvirt trys to detach the PCI device from host as preparation when starting up the domain, and it also binds the device to pci_stub driver, so it's strange that you need to do it manually? what's your libvirt version?
在 2011年5月3日 上午8:47，David White <dwhite@speakeasy.net <mailto:dwhite@speakeasy.net>>写道：
did you 'unbind' the device from the host OS driver?
On 05/01/2011 01:38 AM, guan qin wrote:
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 more system information is attached.(uname 、ifconfig 、lspci、 cmdline...)
I can't figure out the reason why the eth is still down? can anyone help me ?
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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