[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] Xen PVUSB work

On 16/08/13 23:34, Shakil k wrote:

Hi George,

Can you let me know the required work needed in the area of Âlibxl/xl PVUSBÂalso if you have any documents or suggestion, then please pass on to me.

There are two things that need work, actually:

* Linux kernel side of the PVUSB.Â

There is a PVUSB implimentation in SuSE's "classic Xen" kernel that some people have been able to use, but there are reports that it can be a bit flaky. There is no PVUSB kernel support in mainline Linux. There was an initial port some time ago (Konrad can point you to the tree), but it needs to be rebased, fixed, and upstreamed. If you have the time and inclination, this is probably the most critical part to getting PVUSB working for 4.4, as it's something the rest of us definitely don't have time to do.

* The toolstack side

Near the end of 4.3 we were developing a general interface for adding host USB devices. The interface was designed to be able to support either HVM or PV guests. It didn't make it in on time, but it's close to being done, and I fully expect that I can get it in for 4.4. The patch series I was working on would have implemented only HVM guests, it should be fairly easy to extend for PV guests.

I probably won't have time to work on it for about a month or so; if the kernel side isn't your cup of tea, you'd be welcome to pick up that patch series and try to get it in shape for submission, then add the necessary PV bits.

Patch series here:


Let me know if you do decide to go this route, and I can post the code which partially addresses those comments.

Information on steps required to initiate the PV USB connection given a working PVUSB front-end and back-end here:



Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.