linux-kernel - [PATCH v10 08/10] powerpc/powernv: Thread IMC events detection

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Message-Id: <1496953453-16903-1-git-send-email-maddy@linux.vnet.ibm.com>
Date:   Fri,  9 Jun 2017 01:54:13 +0530
From:   Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
To:     mpe@...erman.id.au
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        stewart@...ux.vnet.ibm.com, eranian@...gle.com,
        benh@...nel.crashing.org, paulus@...ba.org,
        sukadev@...ux.vnet.ibm.com, ego@...ux.vnet.ibm.com,
        mikey@...ling.org, dja@...ens.net, anton@...ba.org,
        Anju T Sudhakar <anju@...ux.vnet.ibm.com>,
        Hemant Kumar <hemant@...ux.vnet.ibm.com>,
        Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
Subject: [PATCH v10 08/10] powerpc/powernv: Thread IMC events detection

From: Anju T Sudhakar <anju@...ux.vnet.ibm.com>

Code to add support for detection of thread IMC events. It adds a new
domain IMC_DOMAIN_THREAD and it is determined with the help of the
"type" property in the imc device-tree.

Signed-off-by: Anju T Sudhakar <anju@...ux.vnet.ibm.com>
Signed-off-by: Hemant Kumar <hemant@...ux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@...ux.vnet.ibm.com>
---
 arch/powerpc/include/asm/imc-pmu.h        | 1 +
 arch/powerpc/include/asm/opal-api.h       | 1 +
 arch/powerpc/perf/imc-pmu.c               | 1 +
 arch/powerpc/platforms/powernv/opal-imc.c | 9 ++++++++-
 4 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/imc-pmu.h b/arch/powerpc/include/asm/imc-pmu.h
index 88bc7ef6cc1e..6659846c21ab 100644
--- a/arch/powerpc/include/asm/imc-pmu.h
+++ b/arch/powerpc/include/asm/imc-pmu.h
@@ -96,6 +96,7 @@ struct imc_pmu {
  */
 #define IMC_DOMAIN_NEST		1
 #define IMC_DOMAIN_CORE		2
+#define IMC_DOMAIN_THREAD	3
 
 extern struct imc_pmu *per_nest_pmu_arr[IMC_MAX_PMUS];
 extern struct imc_pmu *core_imc_pmu;
diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h
index 7a58617490cf..40a4df6e161b 100644
--- a/arch/powerpc/include/asm/opal-api.h
+++ b/arch/powerpc/include/asm/opal-api.h
@@ -1008,6 +1008,7 @@ enum {
 
 /* In-Memory Collection Counters Type */
 enum {
+	IMC_COUNTER_PER_THREAD		= 0x1,
 	IMC_COUNTER_PER_SUB_CORE	= 0x2,
 	IMC_COUNTER_PER_CORE		= 0x4,
 	IMC_COUNTER_PER_QUAD		= 0x8,
diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index cdee29b92945..e15a8df3d3b7 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c
@@ -21,6 +21,7 @@
 /* Needed for sanity check */
 extern u64 nest_max_offset;
 extern u64 core_max_offset;
+extern u64 thread_max_offset;
 
 struct imc_pmu *per_nest_pmu_arr[IMC_MAX_PMUS];
 static cpumask_t nest_imc_cpumask;
diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c
index a3f48866ec12..5fa008cb1b93 100644
--- a/arch/powerpc/platforms/powernv/opal-imc.c
+++ b/arch/powerpc/platforms/powernv/opal-imc.c
@@ -36,6 +36,7 @@
 
 u64 nest_max_offset;
 u64 core_max_offset;
+u64 thread_max_offset;
 
 static int imc_event_prop_update(char *name, struct imc_events *events)
 {
@@ -120,6 +121,10 @@ static void update_max_value(u32 value, int pmu_domain)
 		if (core_max_offset < value)
 			core_max_offset = value;
 		break;
+	case IMC_DOMAIN_THREAD:
+		if (thread_max_offset < value)
+			thread_max_offset = value;
+		break;
 	default:
 		/* Unknown domain, return */
 		return;
@@ -404,7 +409,7 @@ static int imc_get_mem_addr_nest(struct device_node *node,
 /*
  * imc_pmu_create : Takes the parent device which is the pmu unit, pmu_index
  *		    and domain as the inputs.
- * Allocates memory for the pmu, sets up its domain (NEST/CORE), and
+ * Allocates memory for the pmu, sets up its domain (NEST/CORE/THREAD), and
  * calls imc_events_setup() to allocate memory for the events supported
  * by this pmu. Assigns a name for the pmu.
  *
@@ -523,6 +528,8 @@ static int opal_imc_counters_probe(struct platform_device *pdev)
 			domain = IMC_DOMAIN_NEST;
 		else if (type == IMC_COUNTER_PER_CORE)
 			domain = IMC_DOMAIN_CORE;
+		else if (type == IMC_COUNTER_PER_THREAD)
+			domain = IMC_DOMAIN_THREAD;
 		else
 			continue;
 		if (!imc_pmu_create(imc_dev, pmu_count, domain))
-- 
2.7.4