linux-kernel - [PATCH 13/13] powerpc/perf: Add support to dump only arch

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Date:   Mon, 29 Aug 2016 02:30:58 +0530
From:   Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Cc:     Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Stephane Eranian <eranian@...il.com>,
        Russell King <linux@....linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Subject: [PATCH 13/13] powerpc/perf: Add support to dump only arch_regs

perf tool provides us an option to selective dump intr_regs.
Add arch_regs option to it.

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Stephane Eranian <eranian@...il.com>
Cc: Russell King <linux@....linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will.deacon@....com>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@...ux.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