Commit 494ed399 authored by Juergen Gross's avatar Juergen Gross Committed by Greg Kroah-Hartman
Browse files

usb: Introduce Xen pvUSB frontend (xen hcd) 



Introduces the Xen pvUSB frontend. With pvUSB it is possible for a Xen
domU to communicate with a USB device assigned to that domU. The
communication is all done via the pvUSB backend in a driver domain
(usually Dom0) which is owner of the physical device.

The pvUSB frontend is a USB hcd for a virtual USB host connector.

The code is taken from the pvUSB implementation in Xen done by Fujitsu
based on Linux kernel 2.6.18.

Changes from the original version are:
- port to upstream kernel
- put all code in just one source file
- move module to appropriate location in kernel tree
- adapt to Linux style guide
- minor code modifications to increase readability

Signed-off-by: default avatarJuergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20211123132048.5335-3-jgross@suse.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent bae9401d

drivers/usb/host/Kconfig

+11 −0
Original line number Diff line number Diff line
@@ -772,3 +772,14 @@ config USB_HCD_TEST_MODE 
	  This option is of interest only to developers who need to validate

	  their USB hardware designs.  It is not needed for normal use.  If

	  unsure, say N.



config USB_XEN_HCD

	tristate "Xen usb virtual host driver"

	depends on XEN

	select XEN_XENBUS_FRONTEND

	help

	  The Xen usb virtual host driver serves as a frontend driver enabling

	  a Xen guest system to access USB Devices passed through to the guest

	  by the Xen host (usually Dom0).

	  Only needed if the kernel is running in a Xen guest and generic

	  access to a USB device is needed.

drivers/usb/host/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -85,3 +85,4 @@ obj-$(CONFIG_USB_HCD_BCMA) += bcma-hcd.o 
obj-$(CONFIG_USB_HCD_SSB)	+= ssb-hcd.o

obj-$(CONFIG_USB_FOTG210_HCD)	+= fotg210-hcd.o

obj-$(CONFIG_USB_MAX3421_HCD)	+= max3421-hcd.o

obj-$(CONFIG_USB_XEN_HCD)	+= xen-hcd.o

drivers/usb/host/xen-hcd.c

0 → 100644
+1606 −0

File added.

Preview size limit exceeded, changes collapsed.