[RFC PATCH 0/2] Introduce support for hardware break/watchpoints

[Himanshu Chauhan]

This patchset adds support of hardware breakpoints and watchpoints
in RISC-V architecture. The framework is built on top of perf subsystem and
SBI debug trigger extension.

Currently following features are not supported and are in works:
 - Ptrace support
 - Single stepping
 - Virtualization of debug triggers

The SBI debug trigger extension proposal (Draft v6) can be found at:
https://lists.riscv.org/g/sig-hypervisors/message/361

The Sdtrig ISA is part of RISC-V debug specification which can be
found at:
https://github.com/riscv/riscv-debug-spec

Himanshu Chauhan (2):
  riscv: Add SBI debug trigger extension and function ids
  riscv: Introduce support for hardware break/watchpoints

 arch/riscv/Kconfig                     |   1 +
 arch/riscv/include/asm/hw_breakpoint.h | 327 ++++++++++++
 arch/riscv/include/asm/kdebug.h        |   3 +-
 arch/riscv/include/asm/sbi.h           |  31 ++
 arch/riscv/kernel/Makefile             |   1 +
 arch/riscv/kernel/hw_breakpoint.c      | 659 +++++++++++++++++++++++++
 arch/riscv/kernel/traps.c              |   6 +
 7 files changed, 1027 insertions(+), 1 deletion(-)
 create mode 100644 arch/riscv/include/asm/hw_breakpoint.h
 create mode 100644 arch/riscv/kernel/hw_breakpoint.c

-- 
2.34.1