Re: [PATCH V10 2/4] perf/powerpc: add support for sampling intr machine state
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2016-01-20 10:40:30
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On Mon, 2016-01-11 at 15:58 +0530, Anju T wrote:
quoted hunk ↗ jump to hunk
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 9a7057e..c4ce60d 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig@@ -119,6 +119,7 @@ config PPC select GENERIC_ATOMIC64 if PPC32 select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select HAVE_PERF_EVENTS + select HAVE_PERF_REGS select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_HW_BREAKPOINT if PERF_EVENTS && PPC_BOOK3S_64 select ARCH_WANT_IPC_PARSE_VERSIONdiff --git a/arch/powerpc/perf/perf_regs.c b/arch/powerpc/perf/perf_regs.c new file mode 100644 index 0000000..d32581763 --- /dev/null +++ b/arch/powerpc/perf/perf_regs.c
...
+
+u64 perf_reg_abi(struct task_struct *task)
+{
+ return PERF_SAMPLE_REGS_ABI_64;What is this value used for exactly? It seems like on 32-bit kernels we should be returning PERF_SAMPLE_REGS_ABI_32.
+}
+
+void perf_get_regs_user(struct perf_regs *regs_user,
+ struct pt_regs *regs,
+ struct pt_regs *regs_user_copy)
+{
+ regs_user->regs = task_pt_regs(current);
+ regs_user->abi = perf_reg_abi(current);
+}cheers