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Date: Tue, 18 Mar 2014 16:56:44 +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 4/4] 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/Kconfig | 7 ++++
arch/x86/configs/i386_defconfig | 1 +
arch/x86/configs/x86_64_defconfig | 1 +
arch/x86/kernel/cpu/Makefile | 3 +-
arch/x86/kernel/cpu/perf_event_intel_uncore.c | 48 ++++++++++++++++++++++++---
5 files changed, 55 insertions(+), 5 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 0af5250..8e4e247 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1103,6 +1103,13 @@ config X86_CPUID
with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to
/dev/cpu/31/cpuid.
+config X86_INTEL_UNCORE
+ tristate "Intel uncore performance monitoring support"
+ depends on CPU_SUP_INTEL
+ ---help---
+ This adds a driver to access the Uncore performance monitoring Units
+ of Intel processors.
+
choice
prompt "High Memory Support"
default HIGHMEM64G if X86_NUMAQ
diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index a7fef26..15ad0c3 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -49,6 +49,7 @@ CONFIG_MICROCODE=y
CONFIG_MICROCODE_AMD=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
+CONFIG_X86_INTEL_UNCORE=y
CONFIG_HIGHPTE=y
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
# CONFIG_MTRR_SANITIZER is not set
diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
index c1119d4..cc55ed8 100644
--- a/arch/x86/configs/x86_64_defconfig
+++ b/arch/x86/configs/x86_64_defconfig
@@ -47,6 +47,7 @@ CONFIG_MICROCODE=y
CONFIG_MICROCODE_AMD=y
CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
+CONFIG_X86_INTEL_UNCORE=y
CONFIG_NUMA=y
CONFIG_X86_CHECK_BIOS_CORRUPTION=y
# CONFIG_MTRR_SANITIZER is not set
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 7fd54f0..434af30 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -36,7 +36,8 @@ 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_rapl.o
+obj-$(CONFIG_CPU_SUP_INTEL) += perf_event_intel_rapl.o
+obj-$(CONFIG_X86_INTEL_UNCORE) += perf_event_intel_uncore.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 618d502..fd5e883 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -3643,6 +3643,7 @@ 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,
@@ -3654,6 +3655,7 @@ 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;
}
@@ -3671,7 +3673,7 @@ 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;
@@ -3683,7 +3685,7 @@ 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++)
@@ -3910,7 +3912,7 @@ 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;
@@ -4293,4 +4295,42 @@ 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; msr_uncores[i]; i++) {
+ type = msr_uncores[i];
+ for (j = 0; j < type->num_boxes; j++) {
+ pmu = &type->pmus[j];
+ perf_pmu_unregister(&pmu->pmu);
+ }
+ }
+
+ for (i = 0; pci_uncores[i]; i++) {
+ type = 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(msr_uncores);
+}
+
+module_init(intel_uncore_init);
+module_exit(intel_uncore_exit);
+MODULE_DESCRIPTION("Intel Uncore Performance Monitoring driver");
+MODULE_LICENSE("GPL");
--
1.8.5.3
--
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