[PATCH v1 0/2] perf: RISC-V: fix SBI PMU masks for RV32

[Xixin Liu <liuxixin@kylinos.cn>]

Hi,

This series fixes two RV32 mask-width issues in the SBI PMU driver:

  1) Overflow status / restart tracking is u64 but used BIT(), which is
     an unsigned long shift and breaks for indices >= 32 on RV32
  2) The available-counter mask was a single unsigned long while
     iteration uses RISCV_MAX_COUNTERS (64), so RV32 can read past the
     object; store it as a DECLARE_BITMAP

Patches are independent. Please review.

Thanks,
Xixin Liu

---

Xixin Liu (2):
  perf: RISC-V: use BIT_ULL for u64 overflow masks
  perf: RISC-V: store available counter mask as bitmap

 drivers/perf/riscv_pmu_legacy.c |  5 +++--
 drivers/perf/riscv_pmu_sbi.c    | 35 ++++++++++++++++++++++------------
 include/linux/perf/riscv_pmu.h  |  2 +-
 3 files changed, 27 insertions(+), 15 deletions(-)

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2.43.0