The following series creates a debugfs directory for AMD IOMMUs,
constructs a framework for additional entries, an online README,
and a method for dumping device table entries. Data is reported
in a default concise mode, but a verbose mode is enabled via a
filesystem entry.
This is the first of three patch series that will expose a number
of IOMMU registers.
Changes since v2:
- Change lock type to a mutex
- Convert a #define to an inline
- Alphabetize #include files
- Remove unnecessary checks for pointers
- Use kstrtoint() instead of sscanf()
- Added comments
- Minor style fixes
Changes since v1:
- Correctly use CONFIG_AMD_IOMMU_DEBUG in Makefile and header file
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Gary R Hook (5):
iommu/amd - Add debugfs support
iommu/amd - Add a 'verbose' switch for IOMMU debugfs
iommu/amd - Add a README variable for the IOMMU debugfs
iommu/amd - Expose the active IOMMU device table entries
iommu/amd - Add a debugfs entry to specify a IOMMU device table entry
drivers/iommu/Kconfig | 7 +
drivers/iommu/Makefile | 1
drivers/iommu/amd_iommu_debugfs.c | 316 +++++++++++++++++++++++++++++++++++++
drivers/iommu/amd_iommu_init.c | 6 -
drivers/iommu/amd_iommu_proto.h | 7 +
drivers/iommu/amd_iommu_types.h | 3
6 files changed, 338 insertions(+), 2 deletions(-)
create mode 100644 drivers/iommu/amd_iommu_debugfs.c
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