This patchset extend the perf sample regs infrastructure to include architecture specific regs. Current perf_sample_regs_intr exports only registers in the pt_regs to perf.data using PERF_SAMPLE_REGS_INTR sample type. But sometimes we end up looking for or prefer raw register values at the interrupt during debug.
This patchset extends the perf_regs to include arch specific struct, and makes perf_sample_regs_intr in kernel/event/core.c as __weak__ function. This way, an arch specific implementation of perf_sample_regs_intr() can update the arch specific data to the perf_regs. First patch defines a new structure arch_misc_reg and updates the same in the struct perf_regs. Patch also modifies the perf_reg_value() and perf_output_sample_regs() to take perf_regs parameter instead of pt_regs. Second patch updates struct arch_misc_reg for arch/powerpc with pmu registers and adds offsetof macro for the same. It extends perf_reg_value() to use reg idx to decide on struct to return value from. Third patch adds arch specific perf_sample_regs_intr() in arch/powerpc to hook up the arch_misc_regs to perf_regs. This patchset depends on the recent posting by Anju T in [email protected] to enable PERF_SAMPLE_REGS_INTR support in arch/powerpc. https://patchwork.ozlabs.org/patch/539242/ https://patchwork.ozlabs.org/patch/539243/ https://patchwork.ozlabs.org/patch/539244/ Would appreciate comments and feedback. Signed-off-by: Madhavan Srinivasan <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Russell King <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Sukadev Bhattiprolu <[email protected]> Madhavan Srinivasan (3): perf/core: extend perf_regs to include arch specific regs perf/powerpc: update macros and add regs to arch_misc_reg struct perf/powerpc: Functions to update arch_misc_regs arch/arm/include/asm/ptrace.h | 2 ++ arch/arm/kernel/perf_regs.c | 4 +++- arch/arm64/include/asm/ptrace.h | 2 ++ arch/arm64/kernel/perf_regs.c | 4 +++- arch/powerpc/include/uapi/asm/perf_regs.h | 10 ++++++++++ arch/powerpc/include/uapi/asm/ptrace.h | 11 +++++++++++ arch/powerpc/perf/core-book3s.c | 29 +++++++++++++++++++++++++++++ arch/powerpc/perf/perf_regs.c | 28 ++++++++++++++++++++++++++-- arch/x86/include/asm/ptrace.h | 2 ++ arch/x86/kernel/perf_regs.c | 4 +++- include/linux/perf_regs.h | 5 +++-- kernel/events/core.c | 8 ++++---- tools/perf/arch/powerpc/include/perf_regs.h | 16 ++++++++++++++++ 13 files changed, 114 insertions(+), 11 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
