From: Suravee Suthikulpanit <suravee.suthikulpa...@amd.com>
This patch series modifies the existing IOMMU and Perf drivers to support
systems with multiple IOMMUs by allocating an amd_iommu PMU per IOMMU instance.
This allows users to specify performance events and filters separately for each
IOMMU.
This has been tested on the new family17h-based server w/ multiple IOMMUs.
Git branch containing this patch series is available here:
https://github.com/ssuthiku/linux.git perf-iommu-v9
Changes from V8 (https://lkml.org/lkml/2017/1/16/48)
* Rebase to v4.10
* Do not use hwc->idx as pmu index. Instead, include pointers
to struct amd_iommu in the perf_amd_iommu.
* Do not remove local64_cmpxchg() in perf_iommu_read().
* Fix incorrect bitfield when using GENMASK_ULL().
Changes from V7 (https://lkml.org/lkml/2017/1/9/917)
* Re-order patches to clean up first before introducing new stuff.
* Always use amd_iommu_get_num_iommus() to access amd_iommus_present
variable now.
* Fix Perf IOMMU sysfs attributes initialization.
* Miscellaneous clean up
Changes from V6 (https://lkml.org/lkml/2016/12/23/134)
* Renamed function parameters from devid to idx (per Joerg).
* Removed unnecessary function declarations from amd_iommu_proto.h
(per Joerg).
Changes from V5 (https://lkml.org/lkml/2016/2/23/370)
* Rebased onto v4.9.
* Remove the patch which consolidates function delclarations since
we have not yet agreed on the appropriate place for the new header file.
Thanks,
Suravee
Suravee Suthikulpanit (8):
perf/amd/iommu: Declare pr_fmt and remove unnecessary pr_debug
perf/amd/iommu: Clean up bitwise operations
perf/amd/iommu: Clean up perf_iommu_read()
iommu/amd: Introduce amd_iommu_get_num_iommus()
perf/amd/iommu: Modify functions to query max banks and counters
perf/amd/iommu: Modify amd_iommu_pc_get_set_reg_val() to allow
specifying IOMMU
perf/amd/iommu: Fix sysfs perf attribute groups
perf/amd/iommu: Enable support for multiple IOMMUs
arch/x86/events/amd/iommu.c | 258 +++++++++++++++++++---------------------
arch/x86/events/amd/iommu.h | 18 ++-
drivers/iommu/amd_iommu.c | 6 +-
drivers/iommu/amd_iommu_init.c | 104 +++++++++-------
drivers/iommu/amd_iommu_proto.h | 8 +-
drivers/iommu/amd_iommu_types.h | 3 -
6 files changed, 203 insertions(+), 194 deletions(-)
--
1.8.3.1
