[PATCH v2 0/2] Base enablement of IOMMU debugfs support

[Gary R Hook]

These patches create a top-level function to create a debugfs directory
for the IOMMU, under which drivers may create and populate-specific
directories for their device internals.

Patch 1: general IOMMU enablement
Patch 2: basic AMD enablement to demonstrate linkage with patch 1

Introduce a new Kconfig parameter IOMMU_DEBUG to globally allow or
disallow debugfs code to be built.

Changes since v1:
 - Remove debug cruft
 - Remove cruft produced by design change
 - Change the lock to a mutex
 - Coding style fixes
 - Add a comment to document the framework

---

Gary R Hook (2):
      iommu - Enable debugfs exposure of the IOMMU
      iommu/amd: Add basic debugfs infrastructure for AMD IOMMU


 drivers/iommu/Kconfig             |   11 +++++++
 drivers/iommu/Makefile            |    2 +
 drivers/iommu/amd_iommu_debugfs.c |   45 +++++++++++++++++++++++++++++
 drivers/iommu/amd_iommu_init.c    |    7 +++-
 drivers/iommu/amd_iommu_proto.h   |    8 ++++-
 drivers/iommu/amd_iommu_types.h   |    3 ++
 drivers/iommu/iommu-debugfs.c     |   58 +++++++++++++++++++++++++++++++++++++
 include/linux/iommu.h             |    4 +++
 8 files changed, 135 insertions(+), 3 deletions(-)
 create mode 100644 drivers/iommu/amd_iommu_debugfs.c
 create mode 100644 drivers/iommu/iommu-debugfs.c

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