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

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

Madhavan Srinivasan
From: Anju T Sudhakar <[hidden email]>

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 <[hidden email]>
Signed-off-by: Hemant Kumar <[hidden email]>
Signed-off-by: Madhavan Srinivasan <[hidden email]>
---
 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

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