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 v3:
- Remove superfluous calls to debugfs_initialized()
- Emit a warning exactly one time
- Change the Kconfig name to IOMMU_DEBUGFS
- Change the way debugfs modules are made
Changes since v2:
- Move a declaration to outside an ifdef
- Remove a spurious blank line
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 | 6 ++++
drivers/iommu/amd_iommu_debugfs.c | 42 ++++++++++++++++++++++++++++
drivers/iommu/amd_iommu_init.c | 6 +++-
drivers/iommu/amd_iommu_proto.h | 6 ++++
drivers/iommu/amd_iommu_types.h | 3 ++
drivers/iommu/iommu-debugfs.c | 55 +++++++++++++++++++++++++++++++++++++
include/linux/iommu.h | 4 +++
8 files changed, 131 insertions(+), 2 deletions(-)
create mode 100644 drivers/iommu/amd_iommu_debugfs.c
create mode 100644 drivers/iommu/iommu-debugfs.c
--
