[Xen-devel] [PATCH for 4.6 00/13] xen/arm: Resync the SMMU driver with the Linux one

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hello,

The SMMU drivers has diverged from Linux. Having our own driver doesn't make
any benefits and make difficult to backport fixes and/or porting features such
as PCI.

With this series, the core of the SMMU drivers (i.e copied from Linux) is mostly
not modified. If it's the case a comment /* Xen: ... */ has been added
to explain why.

To make the change obvious the resync of the SMMU code is mode in several
step:
    1) Revert the current SMMU driver (patch #6)
    2) Import as it is the driver from Linux (patch #10)
    3) Apply 2 fixes useful to correctly use the SATA with the SMMU on
    calxeda. I don't know why Linux didn't yet applied (patch #11-12)
    4) Changes for Xen (patch #13)

I also took the opportunity of the resync to consolidate the iommu ops in
a single set. When I added the IOMMU set to handle device tree passthrough (
ops assign_dt_device and reassign_dt_device), I didn't think about
merging the ops with the PCI one. In fact Linux is using a single set
and have only few lines per driver specific to each set (PCI or device tree).

A branch is available with all the changes:
    git://xenbits.xen.org/people/julieng/xen-unstable.git branch smmu-rework

Sincerely yours,

Andreas Herrmann (2):
  xen/iommu: smmu: Check for duplicate stream IDs when registering
    master devices
  xen/iommu: smmu: Introduce automatic stream-id-masking

Julien Grall (11):
  xen/arm: gic-v2: Change the device name in DT_DEVICE_START
  xen/arm: vgic: Drop unecessary include asm/device.h
  xen: Introduce ACCESS_ONCE macro
  xen/dt: Extend dt_device_match to possibly store data
  xen/arm: device: Rename device_type into device_match
  xen/iommu: arm: Remove temporary the SMMU driver
  xen: Introduce a generic way to describe device
  xen/iommu: Consolidate device assignment ops into a single set
  xen/arm: Describe device supported by a driver with dt_match_node
  xen/iommu: arm: Import the SMMU driver from Linux
  xen/iommu: smmu: Add Xen specific code to be able to use the driver

 xen/arch/arm/device.c                       |   27 +-
 xen/arch/arm/domain_build.c                 |    2 +-
 xen/arch/arm/gic-v2.c                       |   15 +-
 xen/arch/arm/gic-v3.c                       |   10 +-
 xen/arch/arm/gic.c                          |    2 +-
 xen/arch/arm/platform.c                     |    2 +-
 xen/arch/arm/vgic-v2.c                      |    1 -
 xen/arch/arm/vgic-v3.c                      |    1 -
 xen/common/Makefile                         |    1 +
 xen/common/device.c                         |   21 +
 xen/common/device_tree.c                    |   13 +-
 xen/drivers/char/dt-uart.c                  |    4 +-
 xen/drivers/char/exynos4210-uart.c          |   10 +-
 xen/drivers/char/ns16550.c                  |   14 +-
 xen/drivers/char/omap-uart.c                |   10 +-
 xen/drivers/char/pl011.c                    |   10 +-
 xen/drivers/passthrough/amd/pci_amd_iommu.c |   14 +-
 xen/drivers/passthrough/arm/iommu.c         |    2 +-
 xen/drivers/passthrough/arm/smmu.c          | 4107 +++++++++++++++++----------
 xen/drivers/passthrough/device_tree.c       |    5 +-
 xen/drivers/passthrough/pci.c               |   22 +-
 xen/drivers/passthrough/vtd/iommu.c         |   19 +-
 xen/include/asm-arm/device.h                |   19 +-
 xen/include/asm-arm/gic.h                   |   15 +-
 xen/include/asm-x86/device.h                |   17 +
 xen/include/xen/compiler.h                  |   14 +
 xen/include/xen/device.h                    |   40 +
 xen/include/xen/device_tree.h               |   19 +-
 xen/include/xen/iommu.h                     |   18 +-
 xen/include/xen/pci.h                       |   12 +
 30 files changed, 2843 insertions(+), 1623 deletions(-)
 create mode 100644 xen/common/device.c
 create mode 100644 xen/include/asm-x86/device.h
 create mode 100644 xen/include/xen/device.h

-- 
2.1.3


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