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[Qemu-devel] USB pass through via usb-host
From: |
Alexey Kardashevskiy |
Subject: |
[Qemu-devel] USB pass through via usb-host |
Date: |
Fri, 12 Jun 2015 20:45:23 +1000 |
User-agent: |
Mozilla/5.0 (X11; Linux i686 on x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
Hi!
I am trying usb-host with the root hub like this:
-device nec-usb-xhci,id=id3 \
-device usb-host,id=id4,hostbus=1,hostaddr=1
In the guest I see emulated XHCI and 2 root hubs (and I see exactly the
same picture if I do not pass anytning via usb-host):
address@hidden ~]# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
address@hidden ~]# lspci
00:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller
(rev 03)
The questions are:
1. can we really pass a root hub to a guest? What is expected to happen
there? Should not I see 3 root hubs (2 from emulated XHCI and 3rd one from
usb-host)?
2. can we tell if the root hubs in the guest are emulated or from usb-host?
The questions are to understand what is supported/expected and what is not
rather than report a bug or something :)
Thanks!
This is my host:
address@hidden:~$ lspci -s 0003:09:00.0
0003:09:00.0 USB controller: Texas Instruments TUSB73x0 SuperSpeed USB 3.0
xHCI Host Controller (rev 02)
address@hidden:~$ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 007: ID 046b:ff10 American Megatrends, Inc. Virtual Keyboard
and Mouse
Bus 001 Device 009: ID 046b:ff31 American Megatrends, Inc.
Bus 001 Device 003: ID 046b:ff01 American Megatrends, Inc.
Bus 001 Device 011: ID 0fe6:8101 Kontron (Industrial Computer Source / ICS
Advent) DM9601 Fast Ethernet Adapter
Bus 001 Device 012: ID 136b:0001 STEC
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
--
Alexey
- [Qemu-devel] USB pass through via usb-host,
Alexey Kardashevskiy <=