qemu-kvm安装and配置桥接和SR-IOV (3)

此时,你可以看到PF上有4个VF:

PCI 编号 VF 编号
0000:02:00.1   0  
0000:02:00.2   1  
0000:02:00.3   2  
0000:02:00.4   3  

在ip池查看VFS

ip link show

......

4: ib0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 2044 qdisc mq state UP mode DEFAULT group default qlen 256

link/infiniband 20:00:0a:12:fe:80:00:00:00:00:00:00:ec:0d:9a:03:00:c0:41:d4 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff

vf 0 MAC 00:00:00:00:00:00, spoof checking off, link-state disable, trust off, query_rss off

vf 1 MAC 00:00:00:00:00:00, spoof checking off, link-state disable, trust off, query_rss off

vf 2 MAC 00:00:00:00:00:00, spoof checking off, link-state disable, trust off, query_rss off

vf 3 MAC 00:00:00:00:00:00, spoof checking off, link-state disable, trust off, query_rss off

......

4.3 为qemu添加SR-IOV虚拟化的网卡

查看PCI设备信息

lshw -c network -businfo

Bus info Device Class Description

========================================================

......

pci@0000:02:00.1 ib2 network MT27800 Family [ConnectX-5 Virtual Function]

pci@0000:02:00.2 ib3 network MT27800 Family [ConnectX-5 Virtual Function]

pci@0000:02:00.3 ib4 network MT27800 Family [ConnectX-5 Virtual Function]

pci@0000:02:00.4 ib5 network MT27800 Family [ConnectX-5 Virtual Function]

......

这一步看到的信息,其实在刚才通过 "ibdev2netdev -v" 命令已经得到了。

将设备从宿主机deattach

virsh nodedev-detach pci_0000_02_00_1

命令中,pci_0000_02_00_1 是根据上面由SR-IOV虚拟化出来的PCI设备编号拼接起来的:

0000:02:00.1 --> pci_0000_02_00_1

也可以直接通过如下命令查看:

virsh nodedev-list --tree | grep pci

......

| +- pci_0000_02_00_1

| +- pci_0000_02_00_2

......

如果该虚拟设备不再被使用,需要在 virt-manager 中首先将该设备移除,然后在主机上重新挂载该设备:

virsh nodedev-reattach pci_0000_02_00_1

配置VF直通

方法1(interface):在devices段落里加入(该方法未成功)

virsh edit ubuntu14_04

内容如下:

<interface type='hostdev' managed='yes'> <mac address='52:54:00:ad:ef:8d'/> <source> <address type='pci' domain='0x0000' bus='0x02' slot='0x00' function='0x1'/> </source> <vlan> <tag/> </vlan> </interface>

如不需要设置mac和vlan,可以去掉相应标签。

其中,address中的参数是根据 "lshw -c network -businfo" 获得的信息配置的,例如,我要配置的PCI设备编号是:

pci@0000:02:00.1 ib2

注意对应关系,domain: 0x0000, bus: 0x02, slot: 0x00, function: 0x1.

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