Lu Baolu
4c0fa5bfca
iommu/vt-d: debugfs: Add support to show inv queue internals
Export invalidation queue internals of each iommu device through the
debugfs.
Example of such dump on a Skylake machine:
$ sudo cat /sys/kernel/debug/iommu/intel/invalidation_queue
Invalidation queue on IOMMU: dmar1
Base: 0x1672c9000 Head: 80 Tail: 80
Index qw0 qw1 status
0 0000000000000004 0000000000000000 0000000000000000
1 0000000200000025 00000001672be804 0000000000000000
2 0000000000000011 0000000000000000 0000000000000000
3 0000000200000025 00000001672be80c 0000000000000000
4 00000000000000d2 0000000000000000 0000000000000000
5 0000000200000025 00000001672be814 0000000000000000
6 0000000000000014 0000000000000000 0000000000000000
7 0000000200000025 00000001672be81c 0000000000000000
8 0000000000000014 0000000000000000 0000000000000000
9 0000000200000025 00000001672be824 0000000000000000
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20200516062101.29541-14-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2020-05-18 15:37:26 +02:00
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