This patch series modifies the existing perf_event_amd_iommu driver to support systems with multiple IOMMUs. It introduces new AMD IOMMU APIs, which will are used by the AMD IOMMU Perf driver to access performance counters in multiple IOMMUs.
In addition, this series should also fix current AMD IOMMU PMU driver initialization issue in some existing CZ platform. Changes from V1 (https://lkml.org/lkml/2015/12/22/535): * Update patch3 and 6 to use amd_iommus_present instead of introducing amd_iommu_cnt static variable since they are the same thing Suravee Suthikulpanit (6): perf/amd/iommu: Consolidate and move perf_event_amd_iommu header perf/amd/iommu: Modify functions to query max banks and counters iommu/amd: Introduce amd_iommu_get_num_iommus() perf/amd/iommu: Introduce data structure for tracking prev count. perf/amd/iommu: Introduce get_iommu_bnk_cnt_evt_idx perf/amd/iommu: Enable support for multiple IOMMUs arch/x86/kernel/cpu/perf_event_amd_iommu.c | 145 +++++++++++++++++++---------- arch/x86/kernel/cpu/perf_event_amd_iommu.h | 40 -------- drivers/iommu/amd_iommu_init.c | 117 +++++++++++++++++++---- drivers/iommu/amd_iommu_proto.h | 7 -- include/linux/perf/perf_event_amd_iommu.h | 43 +++++++++ 5 files changed, 239 insertions(+), 113 deletions(-) delete mode 100644 arch/x86/kernel/cpu/perf_event_amd_iommu.h create mode 100644 include/linux/perf/perf_event_amd_iommu.h -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
