[v4] LoongArch: Fix perf hardware breakpoints

[PATCH v4 0/6] LoongArch: Fix perf hardware breakpoints

Tiezhu Yang posted 6 patches 1 day, 6 hours ago

Diff against v1 v2 v3
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arch/loongarch/include/asm/hw_breakpoint.h |  8 +--
arch/loongarch/include/asm/loongarch.h     |  7 ++-
arch/loongarch/include/asm/processor.h     |  3 +
arch/loongarch/include/asm/switch_to.h     |  2 +-
arch/loongarch/kernel/hw_breakpoint.c      | 66 ++++++++++++++++++----
arch/loongarch/kernel/traps.c              | 12 ++--
6 files changed, 74 insertions(+), 24 deletions(-)

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[PATCH v4 0/6] LoongArch: Fix perf hardware breakpoints

Posted by Tiezhu Yang 1 day, 6 hours ago

v4:
  -- Do not modify thread_struct layout for hardware breakpoints

This series addresses severe functional degradations in standard
perf_event usage, including initialization failures and one-shot
triggering limitations.

Tiezhu Yang (6):
  LoongArch: Fix bitmask corruption in update_bp_registers()
  LoongArch: Remove redundant call in update_bp_registers()
  LoongArch: Fix architectural naming typo for CSR_FWPS_SKIP
  LoongArch: Only send SIGTRAP signal if necessary in do_watch()
  LoongArch: Fix perf hardware breakpoint failure via installation
  LoongArch: Fix one-shot limitation for perf hardware breakpoints

 arch/loongarch/include/asm/hw_breakpoint.h |  8 +--
 arch/loongarch/include/asm/loongarch.h     |  7 ++-
 arch/loongarch/include/asm/processor.h     |  3 +
 arch/loongarch/include/asm/switch_to.h     |  2 +-
 arch/loongarch/kernel/hw_breakpoint.c      | 66 ++++++++++++++++++----
 arch/loongarch/kernel/traps.c              | 12 ++--
 6 files changed, 74 insertions(+), 24 deletions(-)

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2.42.0