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-v10 Changes from V9 (https://lkml.org/lkml/2017/2/7/105) * Since each IOMMU PMU in a system functions independently from one another, the amd_iommu_pc_init() function has been modified to allow certain IOMMU PMU initialization to fail w/o disabling the others (patch 9/9). * Define a static pmu (iommu_pmu), and stuct assignment directly. (per Boris) * Refactor code clean up into a separate patch (4/9) (per Boris) 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 Thanks, Suravee Suravee Suthikulpanit (9): 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: Clean up iommu_pc_get_set_reg() 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 | 259 +++++++++++++++++++--------------------- arch/x86/events/amd/iommu.h | 18 ++- drivers/iommu/amd_iommu.c | 6 +- drivers/iommu/amd_iommu_init.c | 101 +++++++++------- drivers/iommu/amd_iommu_proto.h | 8 +- drivers/iommu/amd_iommu_types.h | 3 - 6 files changed, 198 insertions(+), 197 deletions(-) -- 1.8.3.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu