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Message-ID: <tip-514b2346df385fce61cefb940813207758648136@git.kernel.org>
Date: Wed, 13 Aug 2014 01:22:16 -0700
From: "tip-bot for Yan, Zheng" <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, eranian@...gle.com, hpa@...or.com,
mingo@...nel.org, torvalds@...ux-foundation.org,
peterz@...radead.org, acme@...nel.org, zheng.z.yan@...el.com,
tglx@...utronix.de
Subject: [tip:perf/core] perf/x86/uncore:
Declare some functions and variables
Commit-ID: 514b2346df385fce61cefb940813207758648136
Gitweb: http://git.kernel.org/tip/514b2346df385fce61cefb940813207758648136
Author: Yan, Zheng <zheng.z.yan@...el.com>
AuthorDate: Wed, 30 Jul 2014 15:22:12 +0800
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 13 Aug 2014 07:51:05 +0200
perf/x86/uncore: Declare some functions and variables
Prepare for moving hardware specific code to seperate files.
Signed-off-by: Yan, Zheng <zheng.z.yan@...el.com>
Signed-off-by: Peter Zijlstra <peterz@...radead.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: eranian@...gle.com
Cc: andi@...stfloor.org
Link: http://lkml.kernel.org/r/1406704935-27708-1-git-send-email-zheng.z.yan@intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/x86/kernel/cpu/perf_event_intel_uncore.c | 149 +++++++++++++-------------
arch/x86/kernel/cpu/perf_event_intel_uncore.h | 32 ++++--
2 files changed, 98 insertions(+), 83 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.c b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
index cfc6f9d..cfe2353 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.c
@@ -1,24 +1,33 @@
#include "perf_event_intel_uncore.h"
static struct intel_uncore_type *empty_uncore[] = { NULL, };
-static struct intel_uncore_type **msr_uncores = empty_uncore;
-static struct intel_uncore_type **pci_uncores = empty_uncore;
-/* pci bus to socket mapping */
-static int pcibus_to_physid[256] = { [0 ... 255] = -1, };
+struct intel_uncore_type **uncore_msr_uncores = empty_uncore;
+struct intel_uncore_type **uncore_pci_uncores = empty_uncore;
-static struct pci_dev *extra_pci_dev[UNCORE_SOCKET_MAX][UNCORE_EXTRA_PCI_DEV_MAX];
+static bool pcidrv_registered;
+struct pci_driver *uncore_pci_driver;
+/* pci bus to socket mapping */
+int uncore_pcibus_to_physid[256] = { [0 ... 255] = -1, };
+struct pci_dev *uncore_extra_pci_dev[UNCORE_SOCKET_MAX][UNCORE_EXTRA_PCI_DEV_MAX];
static DEFINE_RAW_SPINLOCK(uncore_box_lock);
-
/* mask of cpus that collect uncore events */
static cpumask_t uncore_cpu_mask;
/* constraint for the fixed counter */
-static struct event_constraint constraint_fixed =
+static struct event_constraint uncore_constraint_fixed =
EVENT_CONSTRAINT(~0ULL, 1 << UNCORE_PMC_IDX_FIXED, ~0ULL);
-static struct event_constraint constraint_empty =
+struct event_constraint uncore_constraint_empty =
EVENT_CONSTRAINT(0, 0, 0);
+ssize_t uncore_event_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ struct uncore_event_desc *event =
+ container_of(attr, struct uncore_event_desc, attr);
+ return sprintf(buf, "%s", event->config);
+}
+
#define __BITS_VALUE(x, i, n) ((typeof(x))(((x) >> ((i) * (n))) & \
((1ULL << (n)) - 1)))
@@ -66,18 +75,12 @@ DEFINE_UNCORE_FORMAT_ATTR(mask_vnw, mask_vnw, "config2:3-4");
DEFINE_UNCORE_FORMAT_ATTR(mask0, mask0, "config2:0-31");
DEFINE_UNCORE_FORMAT_ATTR(mask1, mask1, "config2:32-63");
-static void uncore_pmu_start_hrtimer(struct intel_uncore_box *box);
-static void uncore_pmu_cancel_hrtimer(struct intel_uncore_box *box);
-static void uncore_perf_event_update(struct intel_uncore_box *box, struct perf_event *event);
-static void uncore_pmu_event_read(struct perf_event *event);
-
-static struct intel_uncore_pmu *uncore_event_to_pmu(struct perf_event *event)
+struct intel_uncore_pmu *uncore_event_to_pmu(struct perf_event *event)
{
return container_of(event->pmu, struct intel_uncore_pmu, pmu);
}
-static struct intel_uncore_box *
-uncore_pmu_to_box(struct intel_uncore_pmu *pmu, int cpu)
+struct intel_uncore_box *uncore_pmu_to_box(struct intel_uncore_pmu *pmu, int cpu)
{
struct intel_uncore_box *box;
@@ -98,7 +101,7 @@ uncore_pmu_to_box(struct intel_uncore_pmu *pmu, int cpu)
return *per_cpu_ptr(pmu->box, cpu);
}
-static struct intel_uncore_box *uncore_event_to_box(struct perf_event *event)
+struct intel_uncore_box *uncore_event_to_box(struct perf_event *event)
{
/*
* perf core schedules event on the basis of cpu, uncore events are
@@ -107,7 +110,7 @@ static struct intel_uncore_box *uncore_event_to_box(struct perf_event *event)
return uncore_pmu_to_box(uncore_event_to_pmu(event), smp_processor_id());
}
-static u64 uncore_msr_read_counter(struct intel_uncore_box *box, struct perf_event *event)
+u64 uncore_msr_read_counter(struct intel_uncore_box *box, struct perf_event *event)
{
u64 count;
@@ -119,7 +122,7 @@ static u64 uncore_msr_read_counter(struct intel_uncore_box *box, struct perf_eve
/*
* generic get constraint function for shared match/mask registers.
*/
-static struct event_constraint *
+struct event_constraint *
uncore_get_constraint(struct intel_uncore_box *box, struct perf_event *event)
{
struct intel_uncore_extra_reg *er;
@@ -154,10 +157,10 @@ uncore_get_constraint(struct intel_uncore_box *box, struct perf_event *event)
return NULL;
}
- return &constraint_empty;
+ return &uncore_constraint_empty;
}
-static void uncore_put_constraint(struct intel_uncore_box *box, struct perf_event *event)
+void uncore_put_constraint(struct intel_uncore_box *box, struct perf_event *event)
{
struct intel_uncore_extra_reg *er;
struct hw_perf_event_extra *reg1 = &event->hw.extra_reg;
@@ -178,7 +181,7 @@ static void uncore_put_constraint(struct intel_uncore_box *box, struct perf_even
reg1->alloc = 0;
}
-static u64 uncore_shared_reg_config(struct intel_uncore_box *box, int idx)
+u64 uncore_shared_reg_config(struct intel_uncore_box *box, int idx)
{
struct intel_uncore_extra_reg *er;
unsigned long flags;
@@ -627,7 +630,7 @@ fail:
if (alloc & (0x1 << i))
atomic_sub(1 << (i * 6), &er->ref);
}
- return &constraint_empty;
+ return &uncore_constraint_empty;
}
static u64 snbep_cbox_filter_mask(int fields)
@@ -746,7 +749,7 @@ again:
config1 = snbep_pcu_alter_er(event, idx, false);
goto again;
}
- return &constraint_empty;
+ return &uncore_constraint_empty;
}
if (!uncore_box_is_fake(box)) {
@@ -841,7 +844,7 @@ static void snbep_qpi_enable_event(struct intel_uncore_box *box, struct perf_eve
if (reg1->idx != EXTRA_REG_NONE) {
int idx = box->pmu->pmu_idx + SNBEP_PCI_QPI_PORT0_FILTER;
- struct pci_dev *filter_pdev = extra_pci_dev[box->phys_id][idx];
+ struct pci_dev *filter_pdev = uncore_extra_pci_dev[box->phys_id][idx];
WARN_ON_ONCE(!filter_pdev);
if (filter_pdev) {
pci_write_config_dword(filter_pdev, reg1->reg,
@@ -1035,7 +1038,7 @@ static int snbep_pci2phy_map_init(int devid)
*/
for (i = 0; i < 8; i++) {
if (nodeid == ((config >> (3 * i)) & 0x7)) {
- pcibus_to_physid[bus] = i;
+ uncore_pcibus_to_physid[bus] = i;
break;
}
}
@@ -1048,10 +1051,10 @@ static int snbep_pci2phy_map_init(int devid)
*/
i = -1;
for (bus = 255; bus >= 0; bus--) {
- if (pcibus_to_physid[bus] >= 0)
- i = pcibus_to_physid[bus];
+ if (uncore_pcibus_to_physid[bus] >= 0)
+ i = uncore_pcibus_to_physid[bus];
else
- pcibus_to_physid[bus] = i;
+ uncore_pcibus_to_physid[bus] = i;
}
}
@@ -1939,7 +1942,7 @@ static int snb_pci2phy_map_init(int devid)
bus = dev->bus->number;
- pcibus_to_physid[bus] = 0;
+ uncore_pcibus_to_physid[bus] = 0;
pci_dev_put(dev);
@@ -2639,7 +2642,7 @@ fail:
nhmex_mbox_put_shared_reg(box, idx[0]);
if (alloc & 0x2)
nhmex_mbox_put_shared_reg(box, idx[1]);
- return &constraint_empty;
+ return &uncore_constraint_empty;
}
static void nhmex_mbox_put_constraint(struct intel_uncore_box *box, struct perf_event *event)
@@ -2963,7 +2966,7 @@ again:
}
return NULL;
}
- return &constraint_empty;
+ return &uncore_constraint_empty;
}
static void nhmex_rbox_put_constraint(struct intel_uncore_box *box, struct perf_event *event)
@@ -3140,7 +3143,7 @@ static void uncore_assign_hw_event(struct intel_uncore_box *box, struct perf_eve
hwc->event_base = uncore_perf_ctr(box, hwc->idx);
}
-static void uncore_perf_event_update(struct intel_uncore_box *box, struct perf_event *event)
+void uncore_perf_event_update(struct intel_uncore_box *box, struct perf_event *event)
{
u64 prev_count, new_count, delta;
int shift;
@@ -3201,14 +3204,14 @@ static enum hrtimer_restart uncore_pmu_hrtimer(struct hrtimer *hrtimer)
return HRTIMER_RESTART;
}
-static void uncore_pmu_start_hrtimer(struct intel_uncore_box *box)
+void uncore_pmu_start_hrtimer(struct intel_uncore_box *box)
{
__hrtimer_start_range_ns(&box->hrtimer,
ns_to_ktime(box->hrtimer_duration), 0,
HRTIMER_MODE_REL_PINNED, 0);
}
-static void uncore_pmu_cancel_hrtimer(struct intel_uncore_box *box)
+void uncore_pmu_cancel_hrtimer(struct intel_uncore_box *box)
{
hrtimer_cancel(&box->hrtimer);
}
@@ -3291,7 +3294,7 @@ uncore_get_event_constraint(struct intel_uncore_box *box, struct perf_event *eve
}
if (event->attr.config == UNCORE_FIXED_EVENT)
- return &constraint_fixed;
+ return &uncore_constraint_fixed;
if (type->constraints) {
for_each_event_constraint(c, type->constraints) {
@@ -3496,7 +3499,7 @@ static void uncore_pmu_event_del(struct perf_event *event, int flags)
event->hw.last_tag = ~0ULL;
}
-static void uncore_pmu_event_read(struct perf_event *event)
+void uncore_pmu_event_read(struct perf_event *event)
{
struct intel_uncore_box *box = uncore_event_to_box(event);
uncore_perf_event_update(box, event);
@@ -3758,9 +3761,6 @@ fail:
return ret;
}
-static struct pci_driver *uncore_pci_driver;
-static bool pcidrv_registered;
-
/*
* add a pci uncore device
*/
@@ -3771,17 +3771,18 @@ static int uncore_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id
struct intel_uncore_type *type;
int phys_id;
- phys_id = pcibus_to_physid[pdev->bus->number];
+ phys_id = uncore_pcibus_to_physid[pdev->bus->number];
if (phys_id < 0)
return -ENODEV;
if (UNCORE_PCI_DEV_TYPE(id->driver_data) == UNCORE_EXTRA_PCI_DEV) {
- extra_pci_dev[phys_id][UNCORE_PCI_DEV_IDX(id->driver_data)] = pdev;
+ int idx = UNCORE_PCI_DEV_IDX(id->driver_data);
+ uncore_extra_pci_dev[phys_id][idx] = pdev;
pci_set_drvdata(pdev, NULL);
return 0;
}
- type = pci_uncores[UNCORE_PCI_DEV_TYPE(id->driver_data)];
+ type = uncore_pci_uncores[UNCORE_PCI_DEV_TYPE(id->driver_data)];
box = uncore_alloc_box(type, NUMA_NO_NODE);
if (!box)
return -ENOMEM;
@@ -3813,13 +3814,13 @@ static void uncore_pci_remove(struct pci_dev *pdev)
{
struct intel_uncore_box *box = pci_get_drvdata(pdev);
struct intel_uncore_pmu *pmu;
- int i, cpu, phys_id = pcibus_to_physid[pdev->bus->number];
+ int i, cpu, phys_id = uncore_pcibus_to_physid[pdev->bus->number];
box = pci_get_drvdata(pdev);
if (!box) {
for (i = 0; i < UNCORE_EXTRA_PCI_DEV_MAX; i++) {
- if (extra_pci_dev[phys_id][i] == pdev) {
- extra_pci_dev[phys_id][i] = NULL;
+ if (uncore_extra_pci_dev[phys_id][i] == pdev) {
+ uncore_extra_pci_dev[phys_id][i] = NULL;
break;
}
}
@@ -3857,28 +3858,28 @@ static int __init uncore_pci_init(void)
ret = snbep_pci2phy_map_init(0x3ce0);
if (ret)
return ret;
- pci_uncores = snbep_pci_uncores;
+ uncore_pci_uncores = snbep_pci_uncores;
uncore_pci_driver = &snbep_uncore_pci_driver;
break;
case 62: /* IvyTown */
ret = snbep_pci2phy_map_init(0x0e1e);
if (ret)
return ret;
- pci_uncores = ivt_pci_uncores;
+ uncore_pci_uncores = ivt_pci_uncores;
uncore_pci_driver = &ivt_uncore_pci_driver;
break;
case 42: /* Sandy Bridge */
ret = snb_pci2phy_map_init(PCI_DEVICE_ID_INTEL_SNB_IMC);
if (ret)
return ret;
- pci_uncores = snb_pci_uncores;
+ uncore_pci_uncores = snb_pci_uncores;
uncore_pci_driver = &snb_uncore_pci_driver;
break;
case 58: /* Ivy Bridge */
ret = snb_pci2phy_map_init(PCI_DEVICE_ID_INTEL_IVB_IMC);
if (ret)
return ret;
- pci_uncores = snb_pci_uncores;
+ uncore_pci_uncores = snb_pci_uncores;
uncore_pci_driver = &ivb_uncore_pci_driver;
break;
case 60: /* Haswell */
@@ -3886,14 +3887,14 @@ static int __init uncore_pci_init(void)
ret = snb_pci2phy_map_init(PCI_DEVICE_ID_INTEL_HSW_IMC);
if (ret)
return ret;
- pci_uncores = snb_pci_uncores;
+ uncore_pci_uncores = snb_pci_uncores;
uncore_pci_driver = &hsw_uncore_pci_driver;
break;
default:
return 0;
}
- ret = uncore_types_init(pci_uncores);
+ ret = uncore_types_init(uncore_pci_uncores);
if (ret)
return ret;
@@ -3904,7 +3905,7 @@ static int __init uncore_pci_init(void)
if (ret == 0)
pcidrv_registered = true;
else
- uncore_types_exit(pci_uncores);
+ uncore_types_exit(uncore_pci_uncores);
return ret;
}
@@ -3914,7 +3915,7 @@ static void __init uncore_pci_exit(void)
if (pcidrv_registered) {
pcidrv_registered = false;
pci_unregister_driver(uncore_pci_driver);
- uncore_types_exit(pci_uncores);
+ uncore_types_exit(uncore_pci_uncores);
}
}
@@ -3940,8 +3941,8 @@ static void uncore_cpu_dying(int cpu)
struct intel_uncore_box *box;
int i, j;
- for (i = 0; msr_uncores[i]; i++) {
- type = msr_uncores[i];
+ 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];
box = *per_cpu_ptr(pmu->box, cpu);
@@ -3961,8 +3962,8 @@ static int uncore_cpu_starting(int cpu)
phys_id = topology_physical_package_id(cpu);
- for (i = 0; msr_uncores[i]; i++) {
- type = msr_uncores[i];
+ 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];
box = *per_cpu_ptr(pmu->box, cpu);
@@ -4002,8 +4003,8 @@ static int uncore_cpu_prepare(int cpu, int phys_id)
struct intel_uncore_box *box;
int i, j;
- for (i = 0; msr_uncores[i]; i++) {
- type = msr_uncores[i];
+ 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];
if (pmu->func_id < 0)
@@ -4083,8 +4084,8 @@ static void uncore_event_exit_cpu(int cpu)
if (target >= 0)
cpumask_set_cpu(target, &uncore_cpu_mask);
- uncore_change_context(msr_uncores, cpu, target);
- uncore_change_context(pci_uncores, cpu, target);
+ uncore_change_context(uncore_msr_uncores, cpu, target);
+ uncore_change_context(uncore_pci_uncores, cpu, target);
}
static void uncore_event_init_cpu(int cpu)
@@ -4099,8 +4100,8 @@ static void uncore_event_init_cpu(int cpu)
cpumask_set_cpu(cpu, &uncore_cpu_mask);
- uncore_change_context(msr_uncores, -1, cpu);
- uncore_change_context(pci_uncores, -1, cpu);
+ uncore_change_context(uncore_msr_uncores, -1, cpu);
+ uncore_change_context(uncore_pci_uncores, -1, cpu);
}
static int uncore_cpu_notifier(struct notifier_block *self,
@@ -4168,18 +4169,18 @@ static int __init uncore_cpu_init(void)
case 30:
case 37: /* Westmere */
case 44:
- msr_uncores = nhm_msr_uncores;
+ uncore_msr_uncores = nhm_msr_uncores;
break;
case 42: /* Sandy Bridge */
case 58: /* Ivy Bridge */
if (snb_uncore_cbox.num_boxes > max_cores)
snb_uncore_cbox.num_boxes = max_cores;
- msr_uncores = snb_msr_uncores;
+ uncore_msr_uncores = snb_msr_uncores;
break;
case 45: /* Sandy Bridge-EP */
if (snbep_uncore_cbox.num_boxes > max_cores)
snbep_uncore_cbox.num_boxes = max_cores;
- msr_uncores = snbep_msr_uncores;
+ uncore_msr_uncores = snbep_msr_uncores;
break;
case 46: /* Nehalem-EX */
uncore_nhmex = true;
@@ -4188,19 +4189,19 @@ static int __init uncore_cpu_init(void)
nhmex_uncore_mbox.event_descs = wsmex_uncore_mbox_events;
if (nhmex_uncore_cbox.num_boxes > max_cores)
nhmex_uncore_cbox.num_boxes = max_cores;
- msr_uncores = nhmex_msr_uncores;
+ uncore_msr_uncores = nhmex_msr_uncores;
break;
case 62: /* IvyTown */
if (ivt_uncore_cbox.num_boxes > max_cores)
ivt_uncore_cbox.num_boxes = max_cores;
- msr_uncores = ivt_msr_uncores;
+ uncore_msr_uncores = ivt_msr_uncores;
break;
default:
return 0;
}
- ret = uncore_types_init(msr_uncores);
+ ret = uncore_types_init(uncore_msr_uncores);
if (ret)
return ret;
@@ -4213,16 +4214,16 @@ static int __init uncore_pmus_register(void)
struct intel_uncore_type *type;
int i, j;
- for (i = 0; msr_uncores[i]; i++) {
- type = msr_uncores[i];
+ 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];
uncore_pmu_register(pmu);
}
}
- for (i = 0; pci_uncores[i]; i++) {
- type = pci_uncores[i];
+ 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];
uncore_pmu_register(pmu);
diff --git a/arch/x86/kernel/cpu/perf_event_intel_uncore.h b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
index 90236f0..e5b5fd7 100644
--- a/arch/x86/kernel/cpu/perf_event_intel_uncore.h
+++ b/arch/x86/kernel/cpu/perf_event_intel_uncore.h
@@ -505,6 +505,9 @@ struct uncore_event_desc {
const char *config;
};
+ssize_t uncore_event_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf);
+
#define INTEL_UNCORE_EVENT_DESC(_name, _config) \
{ \
.attr = __ATTR(_name, 0444, uncore_event_show, NULL), \
@@ -522,15 +525,6 @@ static ssize_t __uncore_##_var##_show(struct kobject *kobj, \
static struct kobj_attribute format_attr_##_var = \
__ATTR(_name, 0444, __uncore_##_var##_show, NULL)
-
-static ssize_t uncore_event_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- struct uncore_event_desc *event =
- container_of(attr, struct uncore_event_desc, attr);
- return sprintf(buf, "%s", event->config);
-}
-
static inline unsigned uncore_pci_box_ctl(struct intel_uncore_box *box)
{
return box->pmu->type->box_ctl;
@@ -694,3 +688,23 @@ static inline bool uncore_box_is_fake(struct intel_uncore_box *box)
{
return (box->phys_id < 0);
}
+
+struct intel_uncore_pmu *uncore_event_to_pmu(struct perf_event *event);
+struct intel_uncore_box *uncore_pmu_to_box(struct intel_uncore_pmu *pmu, int cpu);
+struct intel_uncore_box *uncore_event_to_box(struct perf_event *event);
+u64 uncore_msr_read_counter(struct intel_uncore_box *box, struct perf_event *event);
+void uncore_pmu_start_hrtimer(struct intel_uncore_box *box);
+void uncore_pmu_cancel_hrtimer(struct intel_uncore_box *box);
+void uncore_pmu_event_read(struct perf_event *event);
+void uncore_perf_event_update(struct intel_uncore_box *box, struct perf_event *event);
+struct event_constraint *
+uncore_get_constraint(struct intel_uncore_box *box, struct perf_event *event);
+void uncore_put_constraint(struct intel_uncore_box *box, struct perf_event *event);
+u64 uncore_shared_reg_config(struct intel_uncore_box *box, int idx);
+
+extern struct intel_uncore_type **uncore_msr_uncores;
+extern struct intel_uncore_type **uncore_pci_uncores;
+extern struct pci_driver *uncore_pci_driver;
+extern int uncore_pcibus_to_physid[256];
+extern struct pci_dev *uncore_extra_pci_dev[UNCORE_SOCKET_MAX][UNCORE_EXTRA_PCI_DEV_MAX];
+extern struct event_constraint uncore_constraint_empty;
--
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