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

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Date:	Mon, 20 Jul 2015 07:13:30 +0200
From:	Juergen Gross <jgross@...e.com>
To:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	konrad.wilk@...cle.com, david.vrabel@...rix.com,
	boris.ostrovsky@...cle.com, linux-usb@...r.kernel.org,
	gregkh@...uxfoundation.org
Subject: Re: [Patch V4 0/3] xen, usb: support pvUSB frontend driver

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
>

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