qemu下的USB直通功能介绍 |
您所在的位置：网站首页 › 虚拟机如何连接u盘 › qemu下的USB直通功能介绍 |
qemu下的USB直通功能介绍
|
文章目录
1. 查看linux usb设备1.1.通过/sys/kernel/debug/usb/devices文件1.2. 通过lsusb命令
2.启动带usb设备的虚拟机2.1.根据Bus, Dev来识别2.2. 根据Bus，Port来识别
3.动态删除usb设备3.1.列出qemu的虚拟usb设备3.2.删除指定设备3.3.动态添加设备
1. 查看linux usb设备
1.1.通过/sys/kernel/debug/usb/devices文件
[root@192 usb-test]# cat /sys/kernel/debug/usb/devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 6
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev= 3.10
S: Manufacturer=Linux 3.10.0-693.21.1.el7.x86_64.debug ehci_hcd
S: Product=EHCI Host Controller
S: SerialNumber=0000:02:03.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms
T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
B: Alloc= 0/900 us ( 0%), #Int= 1, #Iso= 0
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0001 Rev= 3.10
S: Manufacturer=Linux 3.10.0-693.21.1.el7.x86_64.debug uhci_hcd
S: Product=UHCI Host Controller
S: SerialNumber=0000:02:00.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=255ms
T: Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0e0f ProdID=0003 Rev= 1.03
S: Manufacturer=VMware
S: Product=VMware Virtual USB Mouse
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=03(HID ) Sub=01 Prot=02 Driver=usbhid
E: Ad=81(I) Atr=03(Int.) MxPS= 8 Ivl=1ms
T: Bus=02 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 3 Spd=12 MxCh= 7
D: Ver= 1.10 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=0e0f ProdID=0002 Rev= 1.00
S: Product=VMware Virtual USB Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=255ms
T: Bus=02 Lev=02 Prnt=03 Port=00 Cnt=01 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=0e0f ProdID=0008 Rev= 1.00
S: Manufacturer=VMware
S: Product=Virtual Bluetooth Adapter
S: SerialNumber=000650268328
C:* #Ifs= 2 Cfg#= 1 Atr=c0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=1ms
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 0 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 0 Ivl=1ms
I: If#= 1 Alt= 1 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 9 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 9 Ivl=1ms
I: If#= 1 Alt= 2 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 17 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 17 Ivl=1ms
I: If#= 1 Alt= 3 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 25 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 25 Ivl=1ms
I: If#= 1 Alt= 4 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 33 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 33 Ivl=1ms
I: If#= 1 Alt= 5 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E: Ad=03(O) Atr=01(Isoc) MxPS= 49 Ivl=1ms
E: Ad=83(I) Atr=01(Isoc) MxPS= 49 Ivl=1ms
T: Bus=02 Lev=02 Prnt=03 Port=01 Cnt=02 Dev#= 6 Spd=12 MxCh= 0
D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1
P: Vendor=0ef5 ProdID=2202 Rev= 1.00
S: Manufacturer=USB Mass Storage
S: Product=USB Mass Storage
S: SerialNumber=2005102616390601
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=01(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
1.2. 通过lsusb命令
[root@localhost ~]# lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M
|__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M
|__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/7p, 12M
|__ Port 1: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M
|__ Port 1: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M
|__ Port 2: Dev 5, If 0, Class=Mass Storage, Driver=usb-storage, 12M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M
2.启动带usb设备的虚拟机
注意，识别出host上usb设备的方式有很多种，以下的并不完整 2.1.根据Bus, Dev来识别 qemu命令行方式 -device usb-host,hostbus=2,hostaddr=6,id=hostdev0这种方式优点在于Dev号是唯一的，如1.2节所示，每个层级的设备都是统一编号 libvirt xml方式这里效果和上面一样，但是不知道vendor和product的id是否是必须的？？？ 2.2. 根据Bus，Port来识别 qemu命令行方式 -device usb-host,hostbus=2,hostport=2.2,id=hostdev0 \这里要注意hostport的2.2，代表是Bus=02，Port2的Port2，或者是level2的Port2？？？ libvirt xml方式 赞不支持，需要开发 3.动态删除usb设备 3.1.列出qemu的虚拟usb设备 (qemu) info usb Device 0.2, Port 1, Speed 12 Mb/s, Product host:1.2, ID: hostdev0 Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub Device 0.4, Port 2.1, Speed 12 Mb/s, Product USB Mass Storage, ID: hostdev1
字段含义 ID: hostdev0这个就是qemu启动参数里面的id Device 0.2指的是guest里面看到的Dev 2 Port 1指的是Bus 01下面的Port1 Port 2.2指的是Bus 01下面的Port2，再下面的Port1 Product指的是产品名字，没任何意义 由此可见，真正是对host可见的只有ID，因此要删除一个设备，只能通过ID号 [root@192 usb-test]# lsusb -t /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=uhci_hcd/2p, 12M |__ Port 1: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 2: Dev 3, If 0, Class=Hub, Driver=hub/7p, 12M |__ Port 1: Dev 4, If 0, Class=Wireless, Driver=btusb, 12M |__ Port 1: Dev 4, If 1, Class=Wireless, Driver=btusb, 12M |__ Port 2: Dev 5, If 0, Class=Mass Storage, Driver=usb-storage, 12M /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/6p, 480M |__ Port 1: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 480M从host上U盘信息也可以看到，与图3-1显示的信息无关 3.2.删除指定设备 (qemu) device_del hostdev1 (qemu) info usb Device 0.2, Port 1, Speed 12 Mb/s, Product host:1.2, ID: hostdev0 Device 0.3, Port 2, Speed 12 Mb/s, Product QEMU USB Hub可以看到，ID为hostdev1的设备被删除了 -libvirt删除 [root@localhost usb-test]# virsh detach-device vm1-usb --file usb_2.0.xml 3.3.动态添加设备 [root@localhost usb-test]# virsh attach-device vm1-usb --file usb_2.0.xml Device attached successfully[1]USB device & USB controller & USB passthrough [2]Linux下，查看USB设备信息 [3]KVM usb passthrough配置 [4]虚机支持虚拟USB存储设备 [5]qemu: usb存储设备仿真 |
图3-1【本文地址】