Hi all, This series aims to add debugfs support for Intel IOMMU. It exposes IOMMU registers, internal context and dumps individual table entries to help debug Intel IOMMUs.
The first patch does the ground work for the following patches by creating a new Kconfig option - INTEL_IOMMU_DEBUG. It also reorganizes some Intel IOMMU data structures. The next five patches add debugfs support for IOMMU context internals, extended context, register contents, PASID internals, and Interrupt remapping in that order. The information can be accessed in sysfs at '/sys/kernel/debug/intel_iommu/'. Regards, Sohil Changes since v2: - Added a macro for seq file operations based on recommendation by Andy Shevchenko. The marco can be moved to seq_file.h at a future point - Changed the debugfs file names to more relevant ones - Added information for MTRR registers in the regset file Changes since v1: - Fixed seq_printf formatting - Handled the case when Interrupt remapping is not enabled Gayatri Kammela (5): iommu/vt-d: Add debugfs support for Intel IOMMU internals iommu/vt-d: Add Intel IOMMU debugfs to show context internals iommu/vt-d: Add Intel IOMMU debugfs to show extended context internals iommu/vt-d: Add debugfs extension to show register contents iommu/vt-d: Add debugfs extension to show Pasid table contents Sohil Mehta (1): iommu/vt-d: Add debugfs support for Intel IOMMU Interrupt remapping drivers/iommu/Kconfig | 10 + drivers/iommu/Makefile | 1 + drivers/iommu/intel-iommu-debug.c | 417 ++++++++++++++++++++++++++++++++++++++ drivers/iommu/intel-iommu.c | 35 +--- drivers/iommu/intel-svm.c | 8 - include/linux/intel-iommu.h | 34 ++++ include/linux/intel-svm.h | 10 +- 7 files changed, 478 insertions(+), 37 deletions(-) create mode 100644 drivers/iommu/intel-iommu-debug.c -- 2.7.4
