Re: [Patch V4 0/3] xen, usb: support pvUSB frontend driver

[Oleksandr Tyshchenko <oleksandr.tyshchenko@globallogic.com>]

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On Fri, Mar 18, 2016 at 10:32 AM, Juergen Gross <jgross@suse.com> wrote:

> Hi Oleksandr,

Hi Juergen.
Thank you for the quick answer.


>
> On 17/03/16 20:43, Oleksandr Tyshchenko wrote:
> > Hi Juergen, All.
> >
> > I would like to apply PVUSB drivers for using in our platform while
> > PVUSB stuff doesn't reach upstream.
> >
> > Unfortunately, I couldn't find more recent version of "kernel based"
> > backend driver in mailing list.
> > I have found it in v0 only.
> >
> > [Xen-devel] [PATCH 0/4] xen, usb: support pvUSB drivers
> > <
> http://lists.xenproject.org/archives/html/xen-devel/2015-02/msg03245.html>
> >
> > Can I use this frontend driver (v4) together with kernel based backend
> > driver (v0)?
> > Are they fully compatible with each other?
>
> I didn't send any further version as it was regarded to be better to
> provide such a backend via qemu (patches are being reviewed right now,
> I sent them last week).
>
I got it. I have found patch series for "qemu based" backed driver but our
target is a kernel based backend driver like blkback or netback.


> Regarding compatibility: should work. I've tested all possible
> combinations of frontends/backends with both my upstream variants
> you are referring to and the SUSE SLE variants which are kernel-xen
> specific and SUSE-only.
>
> You should be aware, however, that there might be some bugs in the
> v0 backend driver. It was tested by me only.
>
OK, I am going to test it. I will let you know if something doesn't work.


>
> > Thank you.
>
> You're welcome. :-)
>
>
> Juergen
>
> >
> > On Mon, Jul 20, 2015 at 8:13 AM, Juergen Gross <jgross@suse.com
> > <mailto:jgross@suse.com>> wrote:
> >
> >     Ping?
> >
> >
> >     On 06/23/2015 08:53 AM, Juergen Gross wrote:
> >
> >         This series adds XEN guest pvUSB support. With pvUSB it is
> >         possible to
> >         use physical USB devices from a XEN domain.
> >
> >         The support consists of a frontend in form of a virtual hcd
> >         driver in
> >         the unprivileged domU passing I/O-requests to the backend in a
> >         driver
> >         domain (usually Dom0). The backend is not part of this patch
> series,
> >         as it will be supported via qemu.
> >
> >         The code is taken (and adapted) from the original pvUSB
> >         implementation
> >         done for Linux 2.6 in 2008 by Fujitsu.
> >
> >         Normal operation of USB devices by adding and removing them
> >         dynamically
> >         to/from a domain has been tested using various USB devices (USB
> 1.1,
> >         2.0 and 3.0). The pvUSB backend for these tests was a SUSE SLES
> Dom0
> >         with a kernel based backend driver.
> >
> >         Changes in V4:
> >         - remove sysfs file from frontend, as it violated the "one value
> >         per file"
> >            rule and didn't serve any real purpose.
> >
> >         Changes in V3:
> >         - move frontend to drivers/usb/host and rename it to xen-hcd.
> >         - changed name prefixes in patch 1 to "xenusb" as requested by
> Greg
> >         - use __u<n> types rather than uint<n>_t as requested by Greg
> >
> >         Changes in V2:
> >         - removed backend, as it can be implemented in user land
> >         - added some access macros and definitions to the pvUSB interface
> >            description to make it independant from linux kernel USB
> >         internals
> >         - adapted frontend to newer kernel version and use new pvUSB
> >            interface macros
> >         - set port status in one chunk as suggested by Oliver Neukum
> >
> >
> >         Juergen Gross (3):
> >            usb: Add Xen pvUSB protocol description
> >            usb: Introduce Xen pvUSB frontend (xen hcd)
> >            xen: add Xen pvUSB maintainer
> >
> >           MAINTAINERS                      |    8 +
> >           drivers/usb/host/Kconfig         |   11 +
> >           drivers/usb/host/Makefile        |    1 +
> >           drivers/usb/host/xen-hcd.c       | 1594
> >         ++++++++++++++++++++++++++++++++++++++
> >           include/xen/interface/io/usbif.h |  252 ++++++
> >           5 files changed, 1866 insertions(+)
> >           create mode 100644 drivers/usb/host/xen-hcd.c
> >           create mode 100644 include/xen/interface/io/usbif.h
> >
> >
> >
> >     _______________________________________________
> >     Xen-devel mailing list
> >     Xen-devel@lists.xen.org <mailto:Xen-devel@lists.xen.org>
> >     http://lists.xen.org/xen-devel
> >
> >
> >
> >
> > --
> >
> > Oleksandr Tyshchenko | Embedded Dev
> > GlobalLogic
> > www.globallogic.com <http://www.globallogic.com/>
> > <http://www.globallogic.com/>
>
>


-- 

Oleksandr Tyshchenko | Embedded Dev
GlobalLogic
www.globallogic.com
<http://www.globallogic.com/>

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