[PATCH v7 00/11] Add Xue - console over USB 3 Debug Capability

[Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>]

This is integration of https://github.com/connojd/xue into mainline Xen.
This patch series includes several patches that I made in the process, some are
very loosely related.

The driver developed by Connor supports console via USB3 debug capability. The
capability is designed to operate mostly independently of normal XHCI driver,
so this patch series allows dom0 to drive standard USB3 controller part, while
Xen uses DbC for console output.

Changes since RFC:
 - move the driver to xue.c, remove non-Xen parts, remove now unneeded 
abstraction
 - adjust for Xen code style
 - build for x86 only
 - drop patch hidding the device from dom0
Changes since v1:
 - drop ehci patch - already applied
 - adjust for review comments from Jan (see changelogs in individual patches)
Changes since v2:
 - add runtime option to share (or not) the controller with dom0 or other 
domains
 - add RX support
 - several smaller changes according to review comments
Changes since v3:
 - put controller sharing behind experimental kconfig option
 - several other changes according to review comments
Changes since v4:
 - drop first 4 patches - already applied to staging
 - split dbgp=xhci into dbc=xhci
Changes since v5:
 - roll dbc=xhci back into dbgp=xhci, but make it work together with dbgp=ehci
Changes since v6:
 - reorder patches - put acked ones early (I've put acked IOMMU ones early too,
   even without VT-d, because they do make it work on AMD, and it's kind
   of required to get the console work with IOMMU enabled)
 - drop barriers patch (at least for now)
 - new patches for suspend support and console=ehci alias

Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: George Dunlap <george.dunlap@xxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Julien Grall <julien@xxxxxxx>
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Wei Liu <wl@xxxxxxx>
Cc: "Roger Pau Monné" <roger.pau@xxxxxxxxxx>
Cc: Paul Durrant <paul@xxxxxxx>
Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: Connor Davis <connojdavis@xxxxxxxxx>

Marek Marczykowski-Górecki (11):
  drivers/char: allow using both dbgp=xhci and dbgp=ehci
  IOMMU: add common API for device reserved memory
  IOMMU/AMD: wire common device reserved memory API
  drivers/char: mark DMA buffers as reserved for the XHCI
  drivers/char: add RX support to the XHCI driver
  drivers/char: fix handling cable re-plug in XHCI console driver
  drivers/char: allow driving the rest of XHCI by a domain while Xen uses DbC
  IOMMU/VT-d: wire common device reserved memory API
  console: support multiple serial console simultaneously
  drivers/char: suspend handling in XHCI console driver
  drivers/char: add console=ehci as an alias for console=dbgp

 docs/misc/xen-command-line.pandoc        |  30 +-
 xen/drivers/char/Kconfig                 |  11 +-
 xen/drivers/char/console.c               |  98 ++++--
 xen/drivers/char/ehci-dbgp.c             |  14 +-
 xen/drivers/char/serial.c                |  12 +-
 xen/drivers/char/xhci-dbc.c              | 392 +++++++++++++++++++++---
 xen/drivers/passthrough/amd/iommu_acpi.c |  21 +-
 xen/drivers/passthrough/iommu.c          |  46 +++-
 xen/drivers/passthrough/vtd/dmar.c       | 201 +++++++-----
 xen/include/xen/iommu.h                  |  14 +-
 xen/include/xen/serial.h                 |   4 +-
 11 files changed, 693 insertions(+), 150 deletions(-)

base-commit: 3007efadf74d6146a1c0ff1c2fbbae6b53ce7898
-- 
git-series 0.9.1