linux-kernel - [PATCH 09/13] powerpc/perf: Add support for perf_arch

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Message-Id: <1472418058-28659-10-git-send-email-maddy@linux.vnet.ibm.com>
Date:   Mon, 29 Aug 2016 02:30:54 +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 09/13] powerpc/perf: Add support for perf_arch_regs for PPC970 processor

Add code to define support functions and registers mask for
PPC970 processor.

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/perf/ppc970-pmu.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/powerpc/perf/ppc970-pmu.c b/arch/powerpc/perf/ppc970-pmu.c
index 8b6a8a36fa38..0b3121335bf0 100644
--- a/arch/powerpc/perf/ppc970-pmu.c
+++ b/arch/powerpc/perf/ppc970-pmu.c
@@ -12,6 +12,7 @@
 #include <linux/perf_event.h>
 #include <asm/reg.h>
 #include <asm/cputable.h>
+#include <uapi/asm/perf_regs.h>
 
 /*
  * Bits in event code for PPC970
@@ -474,6 +475,26 @@ static int ppc970_cache_events[C(MAX)][C(OP_MAX)][C(RESULT_MAX)] = {
 	},
 };
 
+#define PPC970_ARCH_REGS_MASK	(PERF_ARCH_REG_PVR |\
+		PERF_ARCH_REG_PMC1 | PERF_ARCH_REG_PMC2 |\
+		PERF_ARCH_REG_PMC3 | PERF_ARCH_REG_PMC4 |\
+		PERF_ARCH_REG_PMC5 | PERF_ARCH_REG_PMC6 |\
+		PERF_ARCH_REG_MMCR0 | PERF_ARCH_REG_MMCR1 | PERF_ARCH_REG_MMCRA)
+
+static void ppc970_get_arch_regs(struct perf_arch_regs *regs)
+{
+	regs->regs[PERF_ARCH_REG_POWERPC_PVR] = mfspr(SPRN_PVR);
+	regs->regs[PERF_ARCH_REG_POWERPC_PMC1] = mfspr(SPRN_PMC1);
+	regs->regs[PERF_ARCH_REG_POWERPC_PMC2] = mfspr(SPRN_PMC2);
+	regs->regs[PERF_ARCH_REG_POWERPC_PMC3] = mfspr(SPRN_PMC3);
+	regs->regs[PERF_ARCH_REG_POWERPC_PMC4] = mfspr(SPRN_PMC4);
+	regs->regs[PERF_ARCH_REG_POWERPC_PMC5] = mfspr(SPRN_PMC5);
+	regs->regs[PERF_ARCH_REG_POWERPC_PMC6] = mfspr(SPRN_PMC6);
+	regs->regs[PERF_ARCH_REG_POWERPC_MMCR0] = mfspr(SPRN_MMCR0);
+	regs->regs[PERF_ARCH_REG_POWERPC_MMCR1] = mfspr(SPRN_MMCR1);
+	regs->regs[PERF_ARCH_REG_POWERPC_MMCRA] = mfspr(SPRN_MMCRA);
+}
+
 static struct power_pmu ppc970_pmu = {
 	.name			= "PPC970/FX/MP",
 	.n_counter		= 8,
@@ -488,6 +509,8 @@ static struct power_pmu ppc970_pmu = {
 	.generic_events		= ppc970_generic_events,
 	.cache_events		= &ppc970_cache_events,
 	.flags			= PPMU_NO_SIPR | PPMU_NO_CONT_SAMPLING,
+	.ar_mask		= PPC970_ARCH_REGS_MASK,
+	.get_arch_regs		= ppc970_get_arch_regs,
 };
 
 static int __init init_ppc970_pmu(void)
-- 
2.7.4