Messages in this thread | | | From | Mao Han <> | Subject | [PATCH V7 0/2] riscv: Add perf callchain support | Date | Thu, 5 Sep 2019 11:46:34 +0800 |
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This patchset adds 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.
The patchset has some 'checkpatch.pl --strict' warnings: WARNING: Use #include <linux/perf_regs.h> instead of <asm/perf_regs.h> #141: FILE: tools/perf/arch/riscv/include/perf_regs.h:9: +#include <asm/perf_regs.h>
CHECK: Avoid CamelCase: <Dwfl_Thread> #329: FILE: tools/perf/arch/riscv/util/unwind-libdw.c:9: +bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
CHECK: Avoid CamelCase: <Dwarf_Word> #333: FILE: tools/perf/arch/riscv/util/unwind-libdw.c:13: + Dwarf_Word dwarf_regs[32]; As all the other Linux architectures use asm/perf_regs.h directly and get these camelcases, I didn't try to fix them.
Changes since v6: - add "WITH Linux-syscall-note" for uapi headers.
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
Signed-off-by: Mao Han <han_mao@c-sky.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Greentime Hu <green.hu@gmail.com> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: linux-riscv <linux-riscv@lists.infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Guo Ren <guoren@kernel.org>
Mao Han (2): riscv: Add support for perf registers sampling riscv: Add support for libdw
arch/riscv/Kconfig | 2 + arch/riscv/include/uapi/asm/perf_regs.h | 42 ++++++++++++ arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/perf_regs.c | 44 ++++++++++++ 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 ++++++++++++++++ 12 files changed, 368 insertions(+), 1 deletion(-) create mode 100644 arch/riscv/include/uapi/asm/perf_regs.h 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
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