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x86/perf/intel/uncore: Make the Intel uncore PMU driver modular 

By default, the uncore driver will be built into the kernel. If it is
configured as a module, the supported CPU model can be auto loaded.

This patch also cleans up the code of uncore_cpu_init() and
uncore_pci_init().

Based-on-a-patch-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/1458462817-2475-1-git-send-email-kan.liang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kan Liang 2016-03-20 01:33:36 -07:00 committed by Ingo Molnar
parent 84c48d8d01
commit e633c65a1d
5 changed files with 148 additions and 100 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/x86/Kconfig
View File

@ -160,10 +160,6 @@ config INSTRUCTION_DECODER
def_bool y
depends on KPROBES || PERF_EVENTS || UPROBES
config PERF_EVENTS_INTEL_UNCORE
def_bool y
depends on PERF_EVENTS && CPU_SUP_INTEL && PCI
config OUTPUT_FORMAT
string
default "elf32-i386" if X86_32
@ -1042,6 +1038,8 @@ config X86_THERMAL_VECTOR
def_bool y
depends on X86_MCE_INTEL
source "arch/x86/Kconfig.perf"
config X86_LEGACY_VM86
bool "Legacy VM86 support"
default n

11
arch/x86/Kconfig.perf Normal file
View File

@ -0,0 +1,11 @@
menu "Performance monitoring"
config PERF_EVENTS_INTEL_UNCORE
tristate "Intel uncore performance events"
depends on PERF_EVENTS && CPU_SUP_INTEL && PCI
default y
---help---
Include support for Intel uncore performance events. These are
available on NehalemEX and more modern processors.
endmenu

9
arch/x86/events/Makefile
View File

@ -6,9 +6,6 @@ obj-$(CONFIG_X86_LOCAL_APIC) += amd/ibs.o msr.o
ifdef CONFIG_AMD_IOMMU
obj-$(CONFIG_CPU_SUP_AMD) += amd/iommu.o
endif
obj-$(CONFIG_CPU_SUP_INTEL) += intel/core.o intel/bts.o intel/cqm.o
obj-$(CONFIG_CPU_SUP_INTEL) += intel/cstate.o intel/ds.o intel/knc.o
obj-$(CONFIG_CPU_SUP_INTEL) += intel/lbr.o intel/p4.o intel/p6.o intel/pt.o
obj-$(CONFIG_CPU_SUP_INTEL) += intel/rapl.o msr.o
obj-$(CONFIG_PERF_EVENTS_INTEL_UNCORE) += intel/uncore.o intel/uncore_nhmex.o
obj-$(CONFIG_PERF_EVENTS_INTEL_UNCORE) += intel/uncore_snb.o intel/uncore_snbep.o
obj-$(CONFIG_CPU_SUP_INTEL) += msr.o
obj-$(CONFIG_CPU_SUP_INTEL) += intel/

6
arch/x86/events/intel/Makefile Normal file
View File

@ -0,0 +1,6 @@
obj-$(CONFIG_CPU_SUP_INTEL) += core.o bts.o cqm.o
obj-$(CONFIG_CPU_SUP_INTEL) += cstate.o ds.o knc.o
obj-$(CONFIG_CPU_SUP_INTEL) += lbr.o p4.o p6.o pt.o
obj-$(CONFIG_CPU_SUP_INTEL) += rapl.o
obj-$(CONFIG_PERF_EVENTS_INTEL_UNCORE) += intel-uncore.o
intel-uncore-objs := uncore.o uncore_nhmex.o uncore_snb.o uncore_snbep.o

216
arch/x86/events/intel/uncore.c
View File

@ -1,3 +1,4 @@
#include <asm/cpu_device_id.h>
#include "uncore.h"
static struct intel_uncore_type *empty_uncore[] = { NULL, };
@ -21,6 +22,8 @@ static struct event_constraint uncore_constraint_fixed =
struct event_constraint uncore_constraint_empty =
EVENT_CONSTRAINT(0, 0, 0);
MODULE_LICENSE("GPL");
static int uncore_pcibus_to_physid(struct pci_bus *bus)
{
struct pci2phy_map *map;
@ -754,7 +757,7 @@ static void uncore_pmu_unregister(struct intel_uncore_pmu *pmu)
pmu->registered = false;
}
static void __init __uncore_exit_boxes(struct intel_uncore_type *type, int cpu)
static void __uncore_exit_boxes(struct intel_uncore_type *type, int cpu)
{
struct intel_uncore_pmu *pmu = type->pmus;
struct intel_uncore_box *box;
@ -770,7 +773,7 @@ static void __init __uncore_exit_boxes(struct intel_uncore_type *type, int cpu)
}
}
static void __init uncore_exit_boxes(void *dummy)
static void uncore_exit_boxes(void *dummy)
{
struct intel_uncore_type **types;
@ -787,7 +790,7 @@ static void uncore_free_boxes(struct intel_uncore_pmu *pmu)
kfree(pmu->boxes);
}
static void __init uncore_type_exit(struct intel_uncore_type *type)
static void uncore_type_exit(struct intel_uncore_type *type)
{
struct intel_uncore_pmu *pmu = type->pmus;
int i;
@ -804,7 +807,7 @@ 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)
{
for (; *types; types++)
uncore_type_exit(*types);
@ -989,46 +992,6 @@ static int __init uncore_pci_init(void)
size_t size;
int ret;
switch (boot_cpu_data.x86_model) {
case 45: /* Sandy Bridge-EP */
ret = snbep_uncore_pci_init();
break;
case 62: /* Ivy Bridge-EP */
ret = ivbep_uncore_pci_init();
break;
case 63: /* Haswell-EP */
ret = hswep_uncore_pci_init();
break;
case 79: /* BDX-EP */
case 86: /* BDX-DE */
ret = bdx_uncore_pci_init();
break;
case 42: /* Sandy Bridge */
ret = snb_uncore_pci_init();
break;
case 58: /* Ivy Bridge */
ret = ivb_uncore_pci_init();
break;
case 60: /* Haswell */
case 69: /* Haswell Celeron */
ret = hsw_uncore_pci_init();
break;
case 61: /* Broadwell */
ret = bdw_uncore_pci_init();
break;
case 87: /* Knights Landing */
ret = knl_uncore_pci_init();
break;
case 94: /* SkyLake */
ret = skl_uncore_pci_init();
break;
default:
return -ENODEV;
}
if (ret)
return ret;
size = max_packages * sizeof(struct pci_extra_dev);
uncore_extra_pci_dev = kzalloc(size, GFP_KERNEL);
if (!uncore_extra_pci_dev) {
@ -1060,7 +1023,7 @@ err:
return ret;
}
static void __init uncore_pci_exit(void)
static void uncore_pci_exit(void)
{
if (pcidrv_registered) {
pcidrv_registered = false;
@ -1287,46 +1250,6 @@ static int __init uncore_cpu_init(void)
{
int ret;
switch (boot_cpu_data.x86_model) {
case 26: /* Nehalem */
case 30:
case 37: /* Westmere */
case 44:
nhm_uncore_cpu_init();
break;
case 42: /* Sandy Bridge */
case 58: /* Ivy Bridge */
case 60: /* Haswell */
case 69: /* Haswell */
case 70: /* Haswell */
case 61: /* Broadwell */
case 71: /* Broadwell */
snb_uncore_cpu_init();
break;
case 45: /* Sandy Bridge-EP */
snbep_uncore_cpu_init();
break;
case 46: /* Nehalem-EX */
case 47: /* Westmere-EX aka. Xeon E7 */
nhmex_uncore_cpu_init();
break;
case 62: /* Ivy Bridge-EP */
ivbep_uncore_cpu_init();
break;
case 63: /* Haswell-EP */
hswep_uncore_cpu_init();
break;
case 79: /* BDX-EP */
case 86: /* BDX-DE */
bdx_uncore_cpu_init();
break;
case 87: /* Knights Landing */
knl_uncore_cpu_init();
break;
default:
return -ENODEV;
}
ret = uncore_types_init(uncore_msr_uncores, true);
if (ret)
goto err;
@ -1376,11 +1299,105 @@ static int __init uncore_cpumask_init(bool msr)
return 0;
}
#define X86_UNCORE_MODEL_MATCH(model, init) \
{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (unsigned long)&init }
struct intel_uncore_init_fun {
void (*cpu_init)(void);
int (*pci_init)(void);
};
static const struct intel_uncore_init_fun nhm_uncore_init __initconst = {
.cpu_init = nhm_uncore_cpu_init,
};
static const struct intel_uncore_init_fun snb_uncore_init __initconst = {
.cpu_init = snb_uncore_cpu_init,
.pci_init = snb_uncore_pci_init,
};
static const struct intel_uncore_init_fun ivb_uncore_init __initconst = {
.cpu_init = snb_uncore_cpu_init,
.pci_init = ivb_uncore_pci_init,
};
static const struct intel_uncore_init_fun hsw_uncore_init __initconst = {
.cpu_init = snb_uncore_cpu_init,
.pci_init = hsw_uncore_pci_init,
};
static const struct intel_uncore_init_fun bdw_uncore_init __initconst = {
.cpu_init = snb_uncore_cpu_init,
.pci_init = bdw_uncore_pci_init,
};
static const struct intel_uncore_init_fun snbep_uncore_init __initconst = {
.cpu_init = snbep_uncore_cpu_init,
.pci_init = snbep_uncore_pci_init,
};
static const struct intel_uncore_init_fun nhmex_uncore_init __initconst = {
.cpu_init = nhmex_uncore_cpu_init,
};
static const struct intel_uncore_init_fun ivbep_uncore_init __initconst = {
.cpu_init = ivbep_uncore_cpu_init,
.pci_init = ivbep_uncore_pci_init,
};
static const struct intel_uncore_init_fun hswep_uncore_init __initconst = {
.cpu_init = hswep_uncore_cpu_init,
.pci_init = hswep_uncore_pci_init,
};
static const struct intel_uncore_init_fun bdx_uncore_init __initconst = {
.cpu_init = bdx_uncore_cpu_init,
.pci_init = bdx_uncore_pci_init,
};
static const struct intel_uncore_init_fun knl_uncore_init __initconst = {
.cpu_init = knl_uncore_cpu_init,
.pci_init = knl_uncore_pci_init,
};
static const struct intel_uncore_init_fun skl_uncore_init __initconst = {
.pci_init = skl_uncore_pci_init,
};
static const struct x86_cpu_id intel_uncore_match[] __initconst = {
X86_UNCORE_MODEL_MATCH(26, nhm_uncore_init), /* Nehalem */
X86_UNCORE_MODEL_MATCH(30, nhm_uncore_init),
X86_UNCORE_MODEL_MATCH(37, nhm_uncore_init), /* Westmere */
X86_UNCORE_MODEL_MATCH(44, nhm_uncore_init),
X86_UNCORE_MODEL_MATCH(42, snb_uncore_init), /* Sandy Bridge */
X86_UNCORE_MODEL_MATCH(58, ivb_uncore_init), /* Ivy Bridge */
X86_UNCORE_MODEL_MATCH(60, hsw_uncore_init), /* Haswell */
X86_UNCORE_MODEL_MATCH(69, hsw_uncore_init), /* Haswell Celeron */
X86_UNCORE_MODEL_MATCH(70, hsw_uncore_init), /* Haswell */
X86_UNCORE_MODEL_MATCH(61, bdw_uncore_init), /* Broadwell */
X86_UNCORE_MODEL_MATCH(71, bdw_uncore_init), /* Broadwell */
X86_UNCORE_MODEL_MATCH(45, snbep_uncore_init), /* Sandy Bridge-EP */
X86_UNCORE_MODEL_MATCH(46, nhmex_uncore_init), /* Nehalem-EX */
X86_UNCORE_MODEL_MATCH(47, nhmex_uncore_init), /* Westmere-EX aka. Xeon E7 */
X86_UNCORE_MODEL_MATCH(62, ivbep_uncore_init), /* Ivy Bridge-EP */
X86_UNCORE_MODEL_MATCH(63, hswep_uncore_init), /* Haswell-EP */
X86_UNCORE_MODEL_MATCH(79, bdx_uncore_init), /* BDX-EP */
X86_UNCORE_MODEL_MATCH(86, bdx_uncore_init), /* BDX-DE */
X86_UNCORE_MODEL_MATCH(87, knl_uncore_init), /* Knights Landing */
X86_UNCORE_MODEL_MATCH(94, skl_uncore_init), /* SkyLake */
{},
};
MODULE_DEVICE_TABLE(x86cpu, intel_uncore_match);
static int __init intel_uncore_init(void)
{
int pret, cret, ret;
const struct x86_cpu_id *id;
struct intel_uncore_init_fun *uncore_init;
int pret = 0, cret = 0, ret;
if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
id = x86_match_cpu(intel_uncore_match);
if (!id)
return -ENODEV;
if (cpu_has_hypervisor)
@ -1388,8 +1405,17 @@ static int __init intel_uncore_init(void)
max_packages = topology_max_packages();
pret = uncore_pci_init();
cret = uncore_cpu_init();
uncore_init = (struct intel_uncore_init_fun *)id->driver_data;
if (uncore_init->pci_init) {
pret = uncore_init->pci_init();
if (!pret)
pret = uncore_pci_init();
}
if (uncore_init->cpu_init) {
uncore_init->cpu_init();
cret = uncore_cpu_init();
}
if (cret && pret)
return -ENODEV;
@ -1409,4 +1435,14 @@ err:
cpu_notifier_register_done();
return ret;
}
device_initcall(intel_uncore_init);
module_init(intel_uncore_init);
static void __exit intel_uncore_exit(void)
{
cpu_notifier_register_begin();
__unregister_cpu_notifier(&uncore_cpu_nb);
uncore_types_exit(uncore_msr_uncores);
uncore_pci_exit();
cpu_notifier_register_done();
}
module_exit(intel_uncore_exit);