This series adds XEN guest pvUSB support. With pvUSB it is possible to use physical USB devices from a XEN domain. Since V4 a lot of time (several years) has passed. This is a revived attempt to get the frontend into the kernel. 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 is 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) using the qemu based backend. Changes in V6: - add SPDX line to driver Changes in V5: - added interface documentation to patch 1 - frontend no longer trusts backend to return only sane values 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 | 1606 ++++++++++++++++++++++++++++++ include/xen/interface/io/usbif.h | 421 ++++++++ 5 files changed, 2047 insertions(+) create mode 100644 drivers/usb/host/xen-hcd.c create mode 100644 include/xen/interface/io/usbif.h -- 2.26.2
