perf/x86/amd: Add IOMMU Performance Counter resource management

Browse source

Add functionality to check the availability of the AMD IOMMU Performance
Counters and export this functionality to other core drivers, such as in this
case, a perf AMD IOMMU PMU.  This feature is not bound to any specific AMD
family/model other than the presence of the IOMMU with P-C enabled.

The AMD IOMMU P-C support static counting only at this time.

Signed-off-by: Steven Kinney <steven.kinney@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1370466709-3212-2-git-send-email-suravee.suthikulpanit@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

...

This commit is contained in:

Steven L Kinney 2013-06-05 16:11:48 -05:00 • committed by Ingo Molnar

parent ae0def05ed

commit 30861ddc9c

3 changed files with 150 additions and 12 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

140

drivers/iommu/amd_iommu_init.c

View file

7

drivers/iommu/amd_iommu_proto.h

View file

15

drivers/iommu/amd_iommu_types.h

View file