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):
[root@localhost ~]# 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
[root@localhost ~]# 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:
aik@fstn1:~$ lspci -s 0003:09:00.0
0003:09:00.0 USB controller: Texas Instruments TUSB73x0 SuperSpeed USB 3.0
xHCI Host Controller (rev 02)
aik@fstn1:~$ 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
