[PATCH v1.1 0/7] iommu/riscv: Add HPM support for RISC-V IOMMU

[Lv Zheng]

Includes HPM support for RISC-V IOMMU. The HPM hardware mechnism can be
found in the recent announced SpacemiT SoCs (K3, V100), where T100
(SpacemiT distributed IOMMU) is shipped. 

The tested result can be found as follows:

 root at sdfirm:~# perf stat --timeout 5000 -a -e riscv_iommu_hpm_0/device_dir_walks,config1=0x20c0010000000000/ dmatest; sleep 1
 [  176.110211] dmatest: Started 1 threads using dma0chan0
 [  176.114933] dmatest: dma0chan0-copy0: summary 1 tests, 0 failures 394.94 iops 394 KB/s (0)
 
  Performance counter stats for 'system wide':
 
                  3      riscv_iommu_hpm_0/device_dir_walks,config1=0x20c0010000000000/                                   
 
        0.081056000 seconds time elapsed
 
 root at sdfirm:~# perf stat --timeout 5000 -a -e riscv_iommu_hpm_0/s_stage_walks,config1=0x20c0010000000000/ dmatest; sleep 1
 [   68.152992] dmatest: Started 1 threads using dma0chan0
 [   68.158071] dmatest: dma0chan0-copy0: summary 1 tests, 0 failures 401.92 iops 401 KB/s (0)
 
  Performance counter stats for 'system wide':
 
                  6      riscv_iommu_hpm_0/s_stage_walks,config1=0x20c0010000000000/                                   
 
        0.083192000 seconds time elapsed

Jingyu Li (3):
  iommu/riscv: Enable IOMMU DMA mapping support
  iommu/riscv: Fix WSI mode IRQ number handling
  iommu/riscv: Add HPM support for performance monitoring

Lv Zheng (4):
  dt-bindings: iommu: Add spacemit/t100 features
  spacemit/t100: Add vendor event support for RISC-V IOMMU HPM
  spacemit/t100: Add global filter support for RISC-V IOMMU HPM
  spacemit/t100: Add SpacemiT T100 IOATC HPM support

 .../bindings/iommu/riscv,iommu.yaml           |   60 +-
 drivers/iommu/Kconfig                         |    2 +-
 drivers/iommu/riscv/Kconfig                   |    9 +
 drivers/iommu/riscv/Makefile                  |    1 +
 drivers/iommu/riscv/iommu-bits.h              |   20 +-
 drivers/iommu/riscv/iommu-hpm.c               | 1135 +++++++++++++++++
 drivers/iommu/riscv/iommu-pci.c               |   13 +-
 drivers/iommu/riscv/iommu-platform.c          |   12 +-
 drivers/iommu/riscv/iommu.c                   |   25 +-
 drivers/iommu/riscv/iommu.h                   |   45 +-
 10 files changed, 1308 insertions(+), 14 deletions(-)
 create mode 100644 drivers/iommu/riscv/iommu-hpm.c

-- 
2.43.0

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