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Date: Wed, 13 Aug 2014 16:49:14 +0800
From: "Yan, Zheng" <zheng.z.yan@...el.com>
To: linux-kernel@...r.kernel.org
Cc: a.p.zijlstra@...llo.nl, mingo@...nel.org, acme@...radead.org,
eranian@...gle.com, andi@...stfloor.org,
"Yan, Zheng" <zheng.z.yan@...el.com>
Subject: [PATCH] perf/x86/uncore: modularize Intel uncore driver
This patch adds support for building Intel uncore driver as module.
It adds clean-up code and config option for the Intel uncore driver.
Signed-off-by: Yan, Zheng <zheng.z.yan@...el.com>
---
arch/x86/kernel/cpu/Makefile | 6 ++--
arch/x86/kernel/cpu/perf_event_intel_uncore.c | 48 ++++++++++++++++++++++++---
init/Kconfig | 15 +++++++++
3 files changed, 63 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 7e1fd4e..2ef37fb 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -36,9 +36,11 @@ obj-$(CONFIG_CPU_SUP_AMD) += perf_event_amd_iommu.o
endif
obj-$(CONFIG_CPU_SUP_INTEL) += perf_event_p6.o perf_event_knc.o perf_event_p4.o
obj-$(CONFIG_CPU_SUP_INTEL) += perf_event_intel_lbr.o perf_event_intel_ds.o perf_event_intel.o
-obj-$(CONFIG_CPU_SUP_INTEL) += perf_event_intel_uncore.o perf_event_intel_uncore_snb.o
-obj-$(CONFIG_CPU_SUP_INTEL) += perf_event_intel_uncore_snbep.o perf_event_intel_uncore_nhmex.o
obj-$(CONFIG_CPU_SUP_INTEL) += perf_event_intel_rapl.o
+
+obj-$(CONFIG_PERF_X86_INTEL_UNCORE) += perf_x86_intel_uncore.o
+perf_x86_intel_uncore-y += perf_event_intel_uncore.o perf_event_intel_uncore_snb.o
+perf_x86_intel_uncore-y += perf_event_intel_uncore_snbep.o perf_event_intel_uncore_nhmex.o
endif
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index 4785ee8..81bee5f 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -667,6 +667,7 @@ static int __init uncore_pmu_register(struct intel_uncore_pmu *pmu)
if (!pmu->type->pmu) {
pmu->pmu = (struct pmu) {
+ .module = THIS_MODULE,
.attr_groups = pmu->type->attr_groups,
.task_ctx_nr = perf_invalid_context,
.event_init = uncore_pmu_event_init,
@@ -678,6 +679,7 @@ static int __init uncore_pmu_register(struct intel_uncore_pmu *pmu)
};
} else {
pmu->pmu = *pmu->type->pmu;
+ pmu->pmu.module = THIS_MODULE;
pmu->pmu.attr_groups = pmu->type->attr_groups;
}
@@ -695,7 +697,7 @@ static int __init uncore_pmu_register(struct intel_uncore_pmu *pmu)
return ret;
}
-static void __init uncore_type_exit(struct intel_uncore_type *type)
+static void uncore_type_exit(struct intel_uncore_type *type)
{
int i;
@@ -707,7 +709,7 @@ static void __init uncore_type_exit(struct intel_uncore_type *type)
type->events_group = NULL;
}
-static void __init uncore_types_exit(struct intel_uncore_type **types)
+static void uncore_types_exit(struct intel_uncore_type **types)
{
int i;
for (i = 0; types[i]; i++)
@@ -916,7 +918,7 @@ static int __init uncore_pci_init(void)
return ret;
}
-static void __init uncore_pci_exit(void)
+static void uncore_pci_exit(void)
{
if (pcidrv_registered) {
pcidrv_registered = false;
@@ -1287,4 +1289,42 @@ static int __init intel_uncore_init(void)
fail:
return ret;
}
-device_initcall(intel_uncore_init);
+
+static void __exit uncore_pmus_unregister(void)
+{
+ struct intel_uncore_pmu *pmu;
+ struct intel_uncore_type *type;
+ int i, j;
+
+ for (i = 0; uncore_msr_uncores[i]; i++) {
+ type = uncore_msr_uncores[i];
+ for (j = 0; j < type->num_boxes; j++) {
+ pmu = &type->pmus[j];
+ perf_pmu_unregister(&pmu->pmu);
+ }
+ }
+
+ for (i = 0; uncore_pci_uncores[i]; i++) {
+ type = uncore_pci_uncores[i];
+ for (j = 0; j < type->num_boxes; j++) {
+ pmu = &type->pmus[j];
+ perf_pmu_unregister(&pmu->pmu);
+ }
+ }
+}
+
+static void __exit intel_uncore_exit(void)
+{
+ uncore_pmus_unregister();
+
+ unregister_cpu_notifier(&uncore_cpu_nb);
+
+ uncore_pci_exit();
+
+ uncore_types_exit(uncore_msr_uncores);
+}
+
+module_init(intel_uncore_init);
+module_exit(intel_uncore_exit);
+MODULE_DESCRIPTION("Intel Uncore Performance Monitoring driver");
+MODULE_LICENSE("GPL");
diff --git a/init/Kconfig b/init/Kconfig
index 41066e4..6719207 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1553,6 +1553,21 @@ config PERF_EVENTS
Say Y if unsure.
+config PERF_X86_INTEL_UNCORE
+ default n
+ tristate "Intel uncore performance monitoring support"
+ depends on PERF_EVENTS && CPU_SUP_INTEL && PCI
+ help
+ This option allows kernel to access the Uncore performance
+ monitoring units of Intel processors. The Uncore in Intel
+ processors refers to subsystems in the physical processor
+ package that are shared by multiple processor cores. Some
+ of the subsystems in the uncore include the L3 cache, Intel
+ QuickPath Interconnect link logic, and integrated memory
+ controller.
+
+ Say N if unsure.
+
config DEBUG_PERF_USE_VMALLOC
default n
bool "Debug: use vmalloc to back perf mmap() buffers"
--
1.9.3
--
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