This patch set add perf callchain(FP/DWARF) support for RISC-V.
It comes from the csky version callchain support with some
slight modifications. The patchset base on Linux 5.3-rc6.
Changes since v5:
- use walk_stackframe from stacktrace.c to handle
kernel callchain unwinding(fix invalid mem access)
Changes since v4:
- Add missing PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET
verified with extra CFLAGS(-Wall -Werror)
Changes since v3:
- Add more strict check for unwind_frame_kernel
- update for kernel 5.3
Changes since v2:
- fix inconsistent comment
- force to build kernel with -fno-omit-frame-pointer if perf
event is enabled
Changes since v1:
- simplify implementation and code convention
Cc: Paul Walmsley <paul.walms...@sifive.com>
Cc: Greentime Hu <green...@gmail.com>
Cc: Palmer Dabbelt <pal...@sifive.com>
Cc: linux-riscv <linux-ri...@lists.infradead.org>
Cc: Christoph Hellwig <h...@lst.de>
Cc: Guo Ren <guo...@kernel.org>
Mao Han (3):
riscv: Add perf callchain support
riscv: Add support for perf registers sampling
riscv: Add support for libdw
arch/riscv/Kconfig | 2 +
arch/riscv/Makefile | 3 +
arch/riscv/include/uapi/asm/perf_regs.h | 42 ++++++++++++
arch/riscv/kernel/Makefile | 4 +-
arch/riscv/kernel/perf_callchain.c | 95 ++++++++++++++++++++++++++
arch/riscv/kernel/perf_regs.c | 44 ++++++++++++
arch/riscv/kernel/stacktrace.c | 2 +-
tools/arch/riscv/include/uapi/asm/perf_regs.h | 42 ++++++++++++
tools/perf/Makefile.config | 6 +-
tools/perf/arch/riscv/Build | 1 +
tools/perf/arch/riscv/Makefile | 4 ++
tools/perf/arch/riscv/include/perf_regs.h | 96 +++++++++++++++++++++++++++
tools/perf/arch/riscv/util/Build | 2 +
tools/perf/arch/riscv/util/dwarf-regs.c | 72 ++++++++++++++++++++
tools/perf/arch/riscv/util/unwind-libdw.c | 57 ++++++++++++++++
15 files changed, 469 insertions(+), 3 deletions(-)
create mode 100644 arch/riscv/include/uapi/asm/perf_regs.h
create mode 100644 arch/riscv/kernel/perf_callchain.c
create mode 100644 arch/riscv/kernel/perf_regs.c
create mode 100644 tools/arch/riscv/include/uapi/asm/perf_regs.h
create mode 100644 tools/perf/arch/riscv/Build
create mode 100644 tools/perf/arch/riscv/Makefile
create mode 100644 tools/perf/arch/riscv/include/perf_regs.h
create mode 100644 tools/perf/arch/riscv/util/Build
create mode 100644 tools/perf/arch/riscv/util/dwarf-regs.c
create mode 100644 tools/perf/arch/riscv/util/unwind-libdw.c
--
2.7.4
