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Diffstat (limited to 'arch/x86/kernel/cpu')
-rw-r--r--arch/x86/kernel/cpu/intel_cacheinfo.c70
1 files changed, 40 insertions, 30 deletions
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 1b889860eb73..2e8b323b34e4 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -129,7 +129,7 @@ struct _cpuid4_info {
union _cpuid4_leaf_ebx ebx;
union _cpuid4_leaf_ecx ecx;
unsigned long size;
- cpumask_t shared_cpu_map;
+ cpumask_t shared_cpu_map; /* future?: only cpus/node is needed */
};
unsigned short num_cache_leaves;
@@ -451,8 +451,8 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
}
/* pointer to _cpuid4_info array (for each cache leaf) */
-static struct _cpuid4_info *cpuid4_info[NR_CPUS];
-#define CPUID4_INFO_IDX(x,y) (&((cpuid4_info[x])[y]))
+static DEFINE_PER_CPU(struct _cpuid4_info *, cpuid4_info);
+#define CPUID4_INFO_IDX(x, y) (&((per_cpu(cpuid4_info, x))[y]))
#ifdef CONFIG_SMP
static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
@@ -474,7 +474,7 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
if (cpu_data(i).apicid >> index_msb ==
c->apicid >> index_msb) {
cpu_set(i, this_leaf->shared_cpu_map);
- if (i != cpu && cpuid4_info[i]) {
+ if (i != cpu && per_cpu(cpuid4_info, i)) {
sibling_leaf = CPUID4_INFO_IDX(i, index);
cpu_set(cpu, sibling_leaf->shared_cpu_map);
}
@@ -505,8 +505,8 @@ static void __cpuinit free_cache_attributes(unsigned int cpu)
for (i = 0; i < num_cache_leaves; i++)
cache_remove_shared_cpu_map(cpu, i);
- kfree(cpuid4_info[cpu]);
- cpuid4_info[cpu] = NULL;
+ kfree(per_cpu(cpuid4_info, cpu));
+ per_cpu(cpuid4_info, cpu) = NULL;
}
static int __cpuinit detect_cache_attributes(unsigned int cpu)
@@ -519,9 +519,9 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
if (num_cache_leaves == 0)
return -ENOENT;
- cpuid4_info[cpu] = kzalloc(
+ per_cpu(cpuid4_info, cpu) = kzalloc(
sizeof(struct _cpuid4_info) * num_cache_leaves, GFP_KERNEL);
- if (cpuid4_info[cpu] == NULL)
+ if (per_cpu(cpuid4_info, cpu) == NULL)
return -ENOMEM;
oldmask = current->cpus_allowed;
@@ -546,8 +546,8 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
out:
if (retval) {
- kfree(cpuid4_info[cpu]);
- cpuid4_info[cpu] = NULL;
+ kfree(per_cpu(cpuid4_info, cpu));
+ per_cpu(cpuid4_info, cpu) = NULL;
}
return retval;
@@ -561,7 +561,7 @@ out:
extern struct sysdev_class cpu_sysdev_class; /* from drivers/base/cpu.c */
/* pointer to kobject for cpuX/cache */
-static struct kobject * cache_kobject[NR_CPUS];
+static DEFINE_PER_CPU(struct kobject *, cache_kobject);
struct _index_kobject {
struct kobject kobj;
@@ -570,8 +570,8 @@ struct _index_kobject {
};
/* pointer to array of kobjects for cpuX/cache/indexY */
-static struct _index_kobject *index_kobject[NR_CPUS];
-#define INDEX_KOBJECT_PTR(x,y) (&((index_kobject[x])[y]))
+static DEFINE_PER_CPU(struct _index_kobject *, index_kobject);
+#define INDEX_KOBJECT_PTR(x, y) (&((per_cpu(index_kobject, x))[y]))
#define show_one_plus(file_name, object, val) \
static ssize_t show_##file_name \
@@ -593,9 +593,16 @@ static ssize_t show_size(struct _cpuid4_info *this_leaf, char *buf)
static ssize_t show_shared_cpu_map(struct _cpuid4_info *this_leaf, char *buf)
{
- char mask_str[NR_CPUS];
- cpumask_scnprintf(mask_str, NR_CPUS, this_leaf->shared_cpu_map);
- return sprintf(buf, "%s\n", mask_str);
+ int n = 0;
+ int len = cpumask_scnprintf_len(nr_cpu_ids);
+ char *mask_str = kmalloc(len, GFP_KERNEL);
+
+ if (mask_str) {
+ cpumask_scnprintf(mask_str, len, this_leaf->shared_cpu_map);
+ n = sprintf(buf, "%s\n", mask_str);
+ kfree(mask_str);
+ }
+ return n;
}
static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf) {
@@ -684,10 +691,10 @@ static struct kobj_type ktype_percpu_entry = {
static void __cpuinit cpuid4_cache_sysfs_exit(unsigned int cpu)
{
- kfree(cache_kobject[cpu]);
- kfree(index_kobject[cpu]);
- cache_kobject[cpu] = NULL;
- index_kobject[cpu] = NULL;
+ kfree(per_cpu(cache_kobject, cpu));
+ kfree(per_cpu(index_kobject, cpu));
+ per_cpu(cache_kobject, cpu) = NULL;
+ per_cpu(index_kobject, cpu) = NULL;
free_cache_attributes(cpu);
}
@@ -703,13 +710,14 @@ static int __cpuinit cpuid4_cache_sysfs_init(unsigned int cpu)
return err;
/* Allocate all required memory */
- cache_kobject[cpu] = kzalloc(sizeof(struct kobject), GFP_KERNEL);
- if (unlikely(cache_kobject[cpu] == NULL))
+ per_cpu(cache_kobject, cpu) =
+ kzalloc(sizeof(struct kobject), GFP_KERNEL);
+ if (unlikely(per_cpu(cache_kobject, cpu) == NULL))
goto err_out;
- index_kobject[cpu] = kzalloc(
+ per_cpu(index_kobject, cpu) = kzalloc(
sizeof(struct _index_kobject ) * num_cache_leaves, GFP_KERNEL);
- if (unlikely(index_kobject[cpu] == NULL))
+ if (unlikely(per_cpu(index_kobject, cpu) == NULL))
goto err_out;
return 0;
@@ -733,7 +741,8 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
if (unlikely(retval < 0))
return retval;
- retval = kobject_init_and_add(cache_kobject[cpu], &ktype_percpu_entry,
+ retval = kobject_init_and_add(per_cpu(cache_kobject, cpu),
+ &ktype_percpu_entry,
&sys_dev->kobj, "%s", "cache");
if (retval < 0) {
cpuid4_cache_sysfs_exit(cpu);
@@ -745,13 +754,14 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
this_object->cpu = cpu;
this_object->index = i;
retval = kobject_init_and_add(&(this_object->kobj),
- &ktype_cache, cache_kobject[cpu],
+ &ktype_cache,
+ per_cpu(cache_kobject, cpu),
"index%1lu", i);
if (unlikely(retval)) {
for (j = 0; j < i; j++) {
kobject_put(&(INDEX_KOBJECT_PTR(cpu,j)->kobj));
}
- kobject_put(cache_kobject[cpu]);
+ kobject_put(per_cpu(cache_kobject, cpu));
cpuid4_cache_sysfs_exit(cpu);
break;
}
@@ -760,7 +770,7 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
if (!retval)
cpu_set(cpu, cache_dev_map);
- kobject_uevent(cache_kobject[cpu], KOBJ_ADD);
+ kobject_uevent(per_cpu(cache_kobject, cpu), KOBJ_ADD);
return retval;
}
@@ -769,7 +779,7 @@ static void __cpuinit cache_remove_dev(struct sys_device * sys_dev)
unsigned int cpu = sys_dev->id;
unsigned long i;
- if (cpuid4_info[cpu] == NULL)
+ if (per_cpu(cpuid4_info, cpu) == NULL)
return;
if (!cpu_isset(cpu, cache_dev_map))
return;
@@ -777,7 +787,7 @@ static void __cpuinit cache_remove_dev(struct sys_device * sys_dev)
for (i = 0; i < num_cache_leaves; i++)
kobject_put(&(INDEX_KOBJECT_PTR(cpu,i)->kobj));
- kobject_put(cache_kobject[cpu]);
+ kobject_put(per_cpu(cache_kobject, cpu));
cpuid4_cache_sysfs_exit(cpu);
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-10 00:47:08 +0000