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Subject[PATCH 13/13] powerpc/perf: Add support to dump only arch_regs
Date
perf tool provides us an option to selective dump intr_regs.
Add arch_regs option to it.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Stephane Eranian <eranian@gmail.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
---
arch/powerpc/include/uapi/asm/perf_regs.h | 1 +
arch/powerpc/perf/perf_regs.c | 3 +++
tools/arch/powerpc/include/uapi/asm/perf_regs.h | 1 +
tools/perf/arch/powerpc/include/perf_regs.h | 3 ++-
tools/perf/arch/powerpc/util/perf_regs.c | 1 +
5 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/uapi/asm/perf_regs.h b/arch/powerpc/include/uapi/asm/perf_regs.h
index e8f5553a61d1..cbf1c7521ea5 100644
--- a/arch/powerpc/include/uapi/asm/perf_regs.h
+++ b/arch/powerpc/include/uapi/asm/perf_regs.h
@@ -45,6 +45,7 @@ enum perf_event_powerpc_regs {
PERF_REG_POWERPC_TRAP,
PERF_REG_POWERPC_DAR,
PERF_REG_POWERPC_DSISR,
+ PERF_REG_POWERPC_ARCH_REGS,
PERF_REG_POWERPC_MAX,
};

diff --git a/arch/powerpc/perf/perf_regs.c b/arch/powerpc/perf/perf_regs.c
index d24a8a3668fa..eb51f47276ac 100644
--- a/arch/powerpc/perf/perf_regs.c
+++ b/arch/powerpc/perf/perf_regs.c
@@ -75,6 +75,9 @@ u64 perf_reg_value(struct pt_regs *regs, int idx)
if (WARN_ON_ONCE(idx >= PERF_REG_POWERPC_MAX))
return 0;

+ if (idx == PERF_REG_POWERPC_ARCH_REGS)
+ return perf_get_arch_regs_mask();
+
return regs_get_register(regs, pt_regs_offset[idx]);
}

diff --git a/tools/arch/powerpc/include/uapi/asm/perf_regs.h b/tools/arch/powerpc/include/uapi/asm/perf_regs.h
index bf249a27aa36..d4ae8458af3d 100644
--- a/tools/arch/powerpc/include/uapi/asm/perf_regs.h
+++ b/tools/arch/powerpc/include/uapi/asm/perf_regs.h
@@ -45,6 +45,7 @@ enum perf_event_powerpc_regs {
PERF_REG_POWERPC_TRAP,
PERF_REG_POWERPC_DAR,
PERF_REG_POWERPC_DSISR,
+ PERF_REG_POWERPC_ARCH_REGS,
PERF_REG_POWERPC_MAX,
};

diff --git a/tools/perf/arch/powerpc/include/perf_regs.h b/tools/perf/arch/powerpc/include/perf_regs.h
index 801de6def8da..699376afa77f 100644
--- a/tools/perf/arch/powerpc/include/perf_regs.h
+++ b/tools/perf/arch/powerpc/include/perf_regs.h
@@ -60,7 +60,8 @@ static const char *reg_names[] = {
[PERF_REG_POWERPC_SOFTE] = "softe",
[PERF_REG_POWERPC_TRAP] = "trap",
[PERF_REG_POWERPC_DAR] = "dar",
- [PERF_REG_POWERPC_DSISR] = "dsisr"
+ [PERF_REG_POWERPC_DSISR] = "dsisr",
+ [PERF_REG_POWERPC_ARCH_REGS] = "arch_regs"
};

static inline const char *perf_reg_name(int id)
diff --git a/tools/perf/arch/powerpc/util/perf_regs.c b/tools/perf/arch/powerpc/util/perf_regs.c
index a3c3e1ce6807..bd5afa8506e5 100644
--- a/tools/perf/arch/powerpc/util/perf_regs.c
+++ b/tools/perf/arch/powerpc/util/perf_regs.c
@@ -45,5 +45,6 @@ const struct sample_reg sample_reg_masks[] = {
SMPL_REG(trap, PERF_REG_POWERPC_TRAP),
SMPL_REG(dar, PERF_REG_POWERPC_DAR),
SMPL_REG(dsisr, PERF_REG_POWERPC_DSISR),
+ SMPL_REG(arch_regs, PERF_REG_POWERPC_ARCH_REGS),
SMPL_REG_END
};
--
2.7.4
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