[PATCH v6 07/11] powerpc/powernv: Core IMC events detection
From: Madhavan Srinivasan <hidden>
Date: 2017-04-03 14:57:46
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
From: Hemant Kumar <redacted> This patch adds support for detection of core IMC events along with the Nest IMC events. It adds a new domain IMC_DOMAIN_CORE and its determined with the help of the compatibility string "ibm,imc-counters-core" based on the IMC device tree. Signed-off-by: Anju T Sudhakar <redacted> Signed-off-by: Hemant Kumar <redacted> Signed-off-by: Madhavan Srinivasan <redacted> --- arch/powerpc/include/asm/imc-pmu.h | 2 ++ arch/powerpc/perf/imc-pmu.c | 3 +++ arch/powerpc/platforms/powernv/opal-imc.c | 18 ++++++++++++++++-- 3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/imc-pmu.h b/arch/powerpc/include/asm/imc-pmu.h
index e13f51047522..2c39603ff3e7 100644
--- a/arch/powerpc/include/asm/imc-pmu.h
+++ b/arch/powerpc/include/asm/imc-pmu.h@@ -26,6 +26,7 @@ #define IMC_DTB_COMPAT "ibm,opal-in-memory-counters" #define IMC_DTB_NEST_COMPAT "ibm,imc-counters-nest" +#define IMC_DTB_CORE_COMPAT "ibm,imc-counters-core" /* * Structure to hold per chip specific memory address
@@ -63,6 +64,7 @@ struct imc_pmu { * Domains for IMC PMUs */ #define IMC_DOMAIN_NEST 1 +#define IMC_DOMAIN_CORE 2 #define IMC_DOMAIN_UNKNOWN -1 int imc_get_domain(struct device_node *pmu_dev);
diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index b28835b861b3..728c67e139e0 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c@@ -19,8 +19,11 @@ struct perchip_nest_info nest_perchip_info[IMC_MAX_CHIPS]; struct imc_pmu *per_nest_pmu_arr[IMC_MAX_PMUS]; static cpumask_t nest_imc_cpumask; +struct imc_pmu *core_imc_pmu; + /* Needed for sanity check */ extern u64 nest_max_offset; +extern u64 core_max_offset; PMU_FORMAT_ATTR(event, "config:0-20"); static struct attribute *imc_format_attrs[] = {
diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c
index a98678266b0d..f6f63399ab06 100644
--- a/arch/powerpc/platforms/powernv/opal-imc.c
+++ b/arch/powerpc/platforms/powernv/opal-imc.c@@ -34,10 +34,12 @@ extern struct perchip_nest_info nest_perchip_info[IMC_MAX_CHIPS]; extern struct imc_pmu *per_nest_pmu_arr[IMC_MAX_PMUS]; +extern struct imc_pmu *core_imc_pmu; extern int init_imc_pmu(struct imc_events *events, int idx, struct imc_pmu *pmu_ptr); u64 nest_max_offset; +u64 core_max_offset; static int imc_event_info(char *name, struct imc_events *events) {
@@ -81,6 +83,10 @@ static void update_max_value(u32 value, int pmu_domain) if (nest_max_offset < value) nest_max_offset = value; break; + case IMC_DOMAIN_CORE: + if (core_max_offset < value) + core_max_offset = value; + break; default: /* Unknown domain, return */ return;
@@ -232,6 +238,8 @@ int imc_get_domain(struct device_node *pmu_dev) { if (of_device_is_compatible(pmu_dev, IMC_DTB_NEST_COMPAT)) return IMC_DOMAIN_NEST; + if (of_device_is_compatible(pmu_dev, IMC_DTB_CORE_COMPAT)) + return IMC_DOMAIN_CORE; else return IMC_DOMAIN_UNKNOWN; }
@@ -299,7 +307,10 @@ static int imc_pmu_create(struct device_node *parent, int pmu_index) goto free_pmu; /* Needed for hotplug/migration */ - per_nest_pmu_arr[pmu_index] = pmu_ptr; + if (pmu_ptr->domain == IMC_DOMAIN_CORE) + core_imc_pmu = pmu_ptr; + else if (pmu_ptr->domain == IMC_DOMAIN_NEST) + per_nest_pmu_arr[pmu_index] = pmu_ptr; /* * "events" property inside a PMU node contains the phandle value
@@ -355,7 +366,10 @@ static int imc_pmu_create(struct device_node *parent, int pmu_index) } /* Save the name to register it later */ - sprintf(buf, "nest_%s", (char *)pp->value); + if (pmu_ptr->domain == IMC_DOMAIN_NEST) + sprintf(buf, "nest_%s", (char *)pp->value); + else + sprintf(buf, "%s_imc", (char *)pp->value); pmu_ptr->pmu.name = (char *)buf; /*
--
2.7.4