Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 cacheinfo sysfs changes from Ingo Molnar:
"This tree converts the x86 cacheinfo sysfs code to use the generic
code in drivers/base/cacheinfo.c.
It's not intended to change the sysfs ABI:
'This patch neither alters any existing sysfs entries nor their
formating, however since the generic cacheinfo has switched to
use the device attributes instead of the traditional raw
kobjects, a directory named 'power' along with its standard
attributes are added similar to any other device'"
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu/cacheinfo: Fix cache_get_priv_group() for Intel processors
x86/cacheinfo: Move cacheinfo sysfs code to generic infrastructure
This commit is contained in:
Linus Torvalds
Коммит
b48488d109
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@ -7,16 +7,14 @@
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* Andi Kleen / Andreas Herrmann : CPUID4 emulation on AMD.
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/device.h>
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#include <linux/compiler.h>
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#include <linux/cacheinfo.h>
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#include <linux/cpu.h>
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#include <linux/sched.h>
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#include <linux/sysfs.h>
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#include <linux/pci.h>
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#include <asm/processor.h>
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#include <linux/smp.h>
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#include <asm/amd_nb.h>
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#include <asm/smp.h>
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@ -116,10 +114,10 @@ static const struct _cache_table cache_table[] =
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enum _cache_type {
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CACHE_TYPE_NULL = 0,
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CACHE_TYPE_DATA = 1,
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CACHE_TYPE_INST = 2,
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CACHE_TYPE_UNIFIED = 3
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CTYPE_NULL = 0,
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CTYPE_DATA = 1,
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CTYPE_INST = 2,
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CTYPE_UNIFIED = 3
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};
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union _cpuid4_leaf_eax {
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@ -159,11 +157,6 @@ struct _cpuid4_info_regs {
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struct amd_northbridge *nb;
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};
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struct _cpuid4_info {
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struct _cpuid4_info_regs base;
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DECLARE_BITMAP(shared_cpu_map, NR_CPUS);
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};
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unsigned short num_cache_leaves;
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/* AMD doesn't have CPUID4. Emulate it here to report the same
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@ -220,6 +213,13 @@ static const unsigned short assocs[] = {
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static const unsigned char levels[] = { 1, 1, 2, 3 };
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static const unsigned char types[] = { 1, 2, 3, 3 };
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static const enum cache_type cache_type_map[] = {
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[CTYPE_NULL] = CACHE_TYPE_NOCACHE,
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[CTYPE_DATA] = CACHE_TYPE_DATA,
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[CTYPE_INST] = CACHE_TYPE_INST,
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[CTYPE_UNIFIED] = CACHE_TYPE_UNIFIED,
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};
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static void
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amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
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union _cpuid4_leaf_ebx *ebx,
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@ -291,14 +291,8 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
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(ebx->split.ways_of_associativity + 1) - 1;
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}
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struct _cache_attr {
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struct attribute attr;
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ssize_t (*show)(struct _cpuid4_info *, char *, unsigned int);
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ssize_t (*store)(struct _cpuid4_info *, const char *, size_t count,
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unsigned int);
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};
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#if defined(CONFIG_AMD_NB) && defined(CONFIG_SYSFS)
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/*
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* L3 cache descriptors
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*/
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@ -325,20 +319,6 @@ static void amd_calc_l3_indices(struct amd_northbridge *nb)
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l3->indices = (max(max3(sc0, sc1, sc2), sc3) << 10) - 1;
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}
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static void amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf, int index)
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{
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int node;
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/* only for L3, and not in virtualized environments */
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if (index < 3)
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return;
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node = amd_get_nb_id(smp_processor_id());
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this_leaf->nb = node_to_amd_nb(node);
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if (this_leaf->nb && !this_leaf->nb->l3_cache.indices)
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amd_calc_l3_indices(this_leaf->nb);
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}
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/*
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* check whether a slot used for disabling an L3 index is occupied.
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* @l3: L3 cache descriptor
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@ -359,15 +339,13 @@ int amd_get_l3_disable_slot(struct amd_northbridge *nb, unsigned slot)
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return -1;
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}
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static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
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static ssize_t show_cache_disable(struct cacheinfo *this_leaf, char *buf,
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unsigned int slot)
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{
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int index;
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struct amd_northbridge *nb = this_leaf->priv;
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if (!this_leaf->base.nb || !amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
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return -EINVAL;
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index = amd_get_l3_disable_slot(this_leaf->base.nb, slot);
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index = amd_get_l3_disable_slot(nb, slot);
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if (index >= 0)
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return sprintf(buf, "%d\n", index);
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@ -376,9 +354,10 @@ static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
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#define SHOW_CACHE_DISABLE(slot) \
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static ssize_t \
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show_cache_disable_##slot(struct _cpuid4_info *this_leaf, char *buf, \
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unsigned int cpu) \
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cache_disable_##slot##_show(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct cacheinfo *this_leaf = dev_get_drvdata(dev); \
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return show_cache_disable(this_leaf, buf, slot); \
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}
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SHOW_CACHE_DISABLE(0)
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@ -446,25 +425,23 @@ int amd_set_l3_disable_slot(struct amd_northbridge *nb, int cpu, unsigned slot,
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return 0;
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}
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static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
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const char *buf, size_t count,
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unsigned int slot)
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static ssize_t store_cache_disable(struct cacheinfo *this_leaf,
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const char *buf, size_t count,
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unsigned int slot)
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{
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unsigned long val = 0;
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int cpu, err = 0;
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struct amd_northbridge *nb = this_leaf->priv;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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if (!this_leaf->base.nb || !amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
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return -EINVAL;
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cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
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cpu = cpumask_first(&this_leaf->shared_cpu_map);
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if (kstrtoul(buf, 10, &val) < 0)
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return -EINVAL;
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err = amd_set_l3_disable_slot(this_leaf->base.nb, cpu, slot, val);
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err = amd_set_l3_disable_slot(nb, cpu, slot, val);
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if (err) {
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if (err == -EEXIST)
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pr_warning("L3 slot %d in use/index already disabled!\n",
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@ -476,41 +453,36 @@ static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
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#define STORE_CACHE_DISABLE(slot) \
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static ssize_t \
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store_cache_disable_##slot(struct _cpuid4_info *this_leaf, \
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const char *buf, size_t count, \
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unsigned int cpu) \
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cache_disable_##slot##_store(struct device *dev, \
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struct device_attribute *attr, \
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const char *buf, size_t count) \
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{ \
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struct cacheinfo *this_leaf = dev_get_drvdata(dev); \
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return store_cache_disable(this_leaf, buf, count, slot); \
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}
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STORE_CACHE_DISABLE(0)
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STORE_CACHE_DISABLE(1)
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static struct _cache_attr cache_disable_0 = __ATTR(cache_disable_0, 0644,
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show_cache_disable_0, store_cache_disable_0);
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static struct _cache_attr cache_disable_1 = __ATTR(cache_disable_1, 0644,
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show_cache_disable_1, store_cache_disable_1);
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static ssize_t
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show_subcaches(struct _cpuid4_info *this_leaf, char *buf, unsigned int cpu)
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static ssize_t subcaches_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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if (!this_leaf->base.nb || !amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
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return -EINVAL;
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struct cacheinfo *this_leaf = dev_get_drvdata(dev);
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int cpu = cpumask_first(&this_leaf->shared_cpu_map);
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return sprintf(buf, "%x\n", amd_get_subcaches(cpu));
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}
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static ssize_t
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store_subcaches(struct _cpuid4_info *this_leaf, const char *buf, size_t count,
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unsigned int cpu)
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static ssize_t subcaches_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct cacheinfo *this_leaf = dev_get_drvdata(dev);
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int cpu = cpumask_first(&this_leaf->shared_cpu_map);
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unsigned long val;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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if (!this_leaf->base.nb || !amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
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return -EINVAL;
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if (kstrtoul(buf, 16, &val) < 0)
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return -EINVAL;
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@ -520,9 +492,92 @@ store_subcaches(struct _cpuid4_info *this_leaf, const char *buf, size_t count,
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return count;
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}
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static struct _cache_attr subcaches =
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__ATTR(subcaches, 0644, show_subcaches, store_subcaches);
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static DEVICE_ATTR_RW(cache_disable_0);
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static DEVICE_ATTR_RW(cache_disable_1);
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static DEVICE_ATTR_RW(subcaches);
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static umode_t
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cache_private_attrs_is_visible(struct kobject *kobj,
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struct attribute *attr, int unused)
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{
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struct device *dev = kobj_to_dev(kobj);
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struct cacheinfo *this_leaf = dev_get_drvdata(dev);
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umode_t mode = attr->mode;
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if (!this_leaf->priv)
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return 0;
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if ((attr == &dev_attr_subcaches.attr) &&
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amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
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return mode;
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if ((attr == &dev_attr_cache_disable_0.attr ||
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attr == &dev_attr_cache_disable_1.attr) &&
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amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
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return mode;
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return 0;
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}
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static struct attribute_group cache_private_group = {
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.is_visible = cache_private_attrs_is_visible,
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};
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static void init_amd_l3_attrs(void)
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{
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int n = 1;
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static struct attribute **amd_l3_attrs;
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if (amd_l3_attrs) /* already initialized */
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return;
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if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
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n += 2;
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if (amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
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n += 1;
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amd_l3_attrs = kcalloc(n, sizeof(*amd_l3_attrs), GFP_KERNEL);
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if (!amd_l3_attrs)
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return;
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n = 0;
|
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if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) {
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amd_l3_attrs[n++] = &dev_attr_cache_disable_0.attr;
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amd_l3_attrs[n++] = &dev_attr_cache_disable_1.attr;
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}
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if (amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
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amd_l3_attrs[n++] = &dev_attr_subcaches.attr;
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cache_private_group.attrs = amd_l3_attrs;
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}
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const struct attribute_group *
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cache_get_priv_group(struct cacheinfo *this_leaf)
|
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{
|
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struct amd_northbridge *nb = this_leaf->priv;
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|
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if (this_leaf->level < 3 || !nb)
|
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return NULL;
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|
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if (nb && nb->l3_cache.indices)
|
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init_amd_l3_attrs();
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|
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return &cache_private_group;
|
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}
|
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|
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static void amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf, int index)
|
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{
|
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int node;
|
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|
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/* only for L3, and not in virtualized environments */
|
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if (index < 3)
|
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return;
|
||||
|
||||
node = amd_get_nb_id(smp_processor_id());
|
||||
this_leaf->nb = node_to_amd_nb(node);
|
||||
if (this_leaf->nb && !this_leaf->nb->l3_cache.indices)
|
||||
amd_calc_l3_indices(this_leaf->nb);
|
||||
}
|
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#else
|
||||
#define amd_init_l3_cache(x, y)
|
||||
#endif /* CONFIG_AMD_NB && CONFIG_SYSFS */
|
||||
|
|
@ -546,7 +601,7 @@ cpuid4_cache_lookup_regs(int index, struct _cpuid4_info_regs *this_leaf)
|
|||
cpuid_count(4, index, &eax.full, &ebx.full, &ecx.full, &edx);
|
||||
}
|
||||
|
||||
if (eax.split.type == CACHE_TYPE_NULL)
|
||||
if (eax.split.type == CTYPE_NULL)
|
||||
return -EIO; /* better error ? */
|
||||
|
||||
this_leaf->eax = eax;
|
||||
|
|
@ -575,7 +630,7 @@ static int find_num_cache_leaves(struct cpuinfo_x86 *c)
|
|||
/* Do cpuid(op) loop to find out num_cache_leaves */
|
||||
cpuid_count(op, i, &eax, &ebx, &ecx, &edx);
|
||||
cache_eax.full = eax;
|
||||
} while (cache_eax.split.type != CACHE_TYPE_NULL);
|
||||
} while (cache_eax.split.type != CTYPE_NULL);
|
||||
return i;
|
||||
}
|
||||
|
||||
|
|
@ -626,9 +681,9 @@ unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c)
|
|||
|
||||
switch (this_leaf.eax.split.level) {
|
||||
case 1:
|
||||
if (this_leaf.eax.split.type == CACHE_TYPE_DATA)
|
||||
if (this_leaf.eax.split.type == CTYPE_DATA)
|
||||
new_l1d = this_leaf.size/1024;
|
||||
else if (this_leaf.eax.split.type == CACHE_TYPE_INST)
|
||||
else if (this_leaf.eax.split.type == CTYPE_INST)
|
||||
new_l1i = this_leaf.size/1024;
|
||||
break;
|
||||
case 2:
|
||||
|
|
@ -747,55 +802,52 @@ unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c)
|
|||
return l2;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SYSFS
|
||||
|
||||
/* pointer to _cpuid4_info array (for each cache leaf) */
|
||||
static DEFINE_PER_CPU(struct _cpuid4_info *, ici_cpuid4_info);
|
||||
#define CPUID4_INFO_IDX(x, y) (&((per_cpu(ici_cpuid4_info, x))[y]))
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
|
||||
static int cache_shared_amd_cpu_map_setup(unsigned int cpu, int index)
|
||||
static int __cache_amd_cpumap_setup(unsigned int cpu, int index,
|
||||
struct _cpuid4_info_regs *base)
|
||||
{
|
||||
struct _cpuid4_info *this_leaf;
|
||||
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
||||
struct cacheinfo *this_leaf;
|
||||
int i, sibling;
|
||||
|
||||
if (cpu_has_topoext) {
|
||||
unsigned int apicid, nshared, first, last;
|
||||
|
||||
if (!per_cpu(ici_cpuid4_info, cpu))
|
||||
return 0;
|
||||
|
||||
this_leaf = CPUID4_INFO_IDX(cpu, index);
|
||||
nshared = this_leaf->base.eax.split.num_threads_sharing + 1;
|
||||
this_leaf = this_cpu_ci->info_list + index;
|
||||
nshared = base->eax.split.num_threads_sharing + 1;
|
||||
apicid = cpu_data(cpu).apicid;
|
||||
first = apicid - (apicid % nshared);
|
||||
last = first + nshared - 1;
|
||||
|
||||
for_each_online_cpu(i) {
|
||||
this_cpu_ci = get_cpu_cacheinfo(i);
|
||||
if (!this_cpu_ci->info_list)
|
||||
continue;
|
||||
|
||||
apicid = cpu_data(i).apicid;
|
||||
if ((apicid < first) || (apicid > last))
|
||||
continue;
|
||||
if (!per_cpu(ici_cpuid4_info, i))
|
||||
continue;
|
||||
this_leaf = CPUID4_INFO_IDX(i, index);
|
||||
|
||||
this_leaf = this_cpu_ci->info_list + index;
|
||||
|
||||
for_each_online_cpu(sibling) {
|
||||
apicid = cpu_data(sibling).apicid;
|
||||
if ((apicid < first) || (apicid > last))
|
||||
continue;
|
||||
set_bit(sibling, this_leaf->shared_cpu_map);
|
||||
cpumask_set_cpu(sibling,
|
||||
&this_leaf->shared_cpu_map);
|
||||
}
|
||||
}
|
||||
} else if (index == 3) {
|
||||
for_each_cpu(i, cpu_llc_shared_mask(cpu)) {
|
||||
if (!per_cpu(ici_cpuid4_info, i))
|
||||
this_cpu_ci = get_cpu_cacheinfo(i);
|
||||
if (!this_cpu_ci->info_list)
|
||||
continue;
|
||||
this_leaf = CPUID4_INFO_IDX(i, index);
|
||||
this_leaf = this_cpu_ci->info_list + index;
|
||||
for_each_cpu(sibling, cpu_llc_shared_mask(cpu)) {
|
||||
if (!cpu_online(sibling))
|
||||
continue;
|
||||
set_bit(sibling, this_leaf->shared_cpu_map);
|
||||
cpumask_set_cpu(sibling,
|
||||
&this_leaf->shared_cpu_map);
|
||||
}
|
||||
}
|
||||
} else
|
||||
|
|
@ -804,457 +856,86 @@ static int cache_shared_amd_cpu_map_setup(unsigned int cpu, int index)
|
|||
return 1;
|
||||
}
|
||||
|
||||
static void cache_shared_cpu_map_setup(unsigned int cpu, int index)
|
||||
static void __cache_cpumap_setup(unsigned int cpu, int index,
|
||||
struct _cpuid4_info_regs *base)
|
||||
{
|
||||
struct _cpuid4_info *this_leaf, *sibling_leaf;
|
||||
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
||||
struct cacheinfo *this_leaf, *sibling_leaf;
|
||||
unsigned long num_threads_sharing;
|
||||
int index_msb, i;
|
||||
struct cpuinfo_x86 *c = &cpu_data(cpu);
|
||||
|
||||
if (c->x86_vendor == X86_VENDOR_AMD) {
|
||||
if (cache_shared_amd_cpu_map_setup(cpu, index))
|
||||
if (__cache_amd_cpumap_setup(cpu, index, base))
|
||||
return;
|
||||
}
|
||||
|
||||
this_leaf = CPUID4_INFO_IDX(cpu, index);
|
||||
num_threads_sharing = 1 + this_leaf->base.eax.split.num_threads_sharing;
|
||||
this_leaf = this_cpu_ci->info_list + index;
|
||||
num_threads_sharing = 1 + base->eax.split.num_threads_sharing;
|
||||
|
||||
cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map);
|
||||
if (num_threads_sharing == 1)
|
||||
cpumask_set_cpu(cpu, to_cpumask(this_leaf->shared_cpu_map));
|
||||
else {
|
||||
index_msb = get_count_order(num_threads_sharing);
|
||||
return;
|
||||
|
||||
for_each_online_cpu(i) {
|
||||
if (cpu_data(i).apicid >> index_msb ==
|
||||
c->apicid >> index_msb) {
|
||||
cpumask_set_cpu(i,
|
||||
to_cpumask(this_leaf->shared_cpu_map));
|
||||
if (i != cpu && per_cpu(ici_cpuid4_info, i)) {
|
||||
sibling_leaf =
|
||||
CPUID4_INFO_IDX(i, index);
|
||||
cpumask_set_cpu(cpu, to_cpumask(
|
||||
sibling_leaf->shared_cpu_map));
|
||||
}
|
||||
}
|
||||
index_msb = get_count_order(num_threads_sharing);
|
||||
|
||||
for_each_online_cpu(i)
|
||||
if (cpu_data(i).apicid >> index_msb == c->apicid >> index_msb) {
|
||||
struct cpu_cacheinfo *sib_cpu_ci = get_cpu_cacheinfo(i);
|
||||
|
||||
if (i == cpu || !sib_cpu_ci->info_list)
|
||||
continue;/* skip if itself or no cacheinfo */
|
||||
sibling_leaf = sib_cpu_ci->info_list + index;
|
||||
cpumask_set_cpu(i, &this_leaf->shared_cpu_map);
|
||||
cpumask_set_cpu(cpu, &sibling_leaf->shared_cpu_map);
|
||||
}
|
||||
}
|
||||
}
|
||||
static void cache_remove_shared_cpu_map(unsigned int cpu, int index)
|
||||
{
|
||||
struct _cpuid4_info *this_leaf, *sibling_leaf;
|
||||
int sibling;
|
||||
|
||||
this_leaf = CPUID4_INFO_IDX(cpu, index);
|
||||
for_each_cpu(sibling, to_cpumask(this_leaf->shared_cpu_map)) {
|
||||
sibling_leaf = CPUID4_INFO_IDX(sibling, index);
|
||||
cpumask_clear_cpu(cpu,
|
||||
to_cpumask(sibling_leaf->shared_cpu_map));
|
||||
}
|
||||
}
|
||||
#else
|
||||
static void cache_shared_cpu_map_setup(unsigned int cpu, int index)
|
||||
{
|
||||
}
|
||||
|
||||
static void cache_remove_shared_cpu_map(unsigned int cpu, int index)
|
||||
static void ci_leaf_init(struct cacheinfo *this_leaf,
|
||||
struct _cpuid4_info_regs *base)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
static void free_cache_attributes(unsigned int cpu)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < num_cache_leaves; i++)
|
||||
cache_remove_shared_cpu_map(cpu, i);
|
||||
|
||||
kfree(per_cpu(ici_cpuid4_info, cpu));
|
||||
per_cpu(ici_cpuid4_info, cpu) = NULL;
|
||||
this_leaf->level = base->eax.split.level;
|
||||
this_leaf->type = cache_type_map[base->eax.split.type];
|
||||
this_leaf->coherency_line_size =
|
||||
base->ebx.split.coherency_line_size + 1;
|
||||
this_leaf->ways_of_associativity =
|
||||
base->ebx.split.ways_of_associativity + 1;
|
||||
this_leaf->size = base->size;
|
||||
this_leaf->number_of_sets = base->ecx.split.number_of_sets + 1;
|
||||
this_leaf->physical_line_partition =
|
||||
base->ebx.split.physical_line_partition + 1;
|
||||
this_leaf->priv = base->nb;
|
||||
}
|
||||
|
||||
static void get_cpu_leaves(void *_retval)
|
||||
static int __init_cache_level(unsigned int cpu)
|
||||
{
|
||||
int j, *retval = _retval, cpu = smp_processor_id();
|
||||
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
||||
|
||||
/* Do cpuid and store the results */
|
||||
for (j = 0; j < num_cache_leaves; j++) {
|
||||
struct _cpuid4_info *this_leaf = CPUID4_INFO_IDX(cpu, j);
|
||||
|
||||
*retval = cpuid4_cache_lookup_regs(j, &this_leaf->base);
|
||||
if (unlikely(*retval < 0)) {
|
||||
int i;
|
||||
|
||||
for (i = 0; i < j; i++)
|
||||
cache_remove_shared_cpu_map(cpu, i);
|
||||
break;
|
||||
}
|
||||
cache_shared_cpu_map_setup(cpu, j);
|
||||
}
|
||||
}
|
||||
|
||||
static int detect_cache_attributes(unsigned int cpu)
|
||||
{
|
||||
int retval;
|
||||
|
||||
if (num_cache_leaves == 0)
|
||||
if (!num_cache_leaves)
|
||||
return -ENOENT;
|
||||
|
||||
per_cpu(ici_cpuid4_info, cpu) = kzalloc(
|
||||
sizeof(struct _cpuid4_info) * num_cache_leaves, GFP_KERNEL);
|
||||
if (per_cpu(ici_cpuid4_info, cpu) == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
smp_call_function_single(cpu, get_cpu_leaves, &retval, true);
|
||||
if (retval) {
|
||||
kfree(per_cpu(ici_cpuid4_info, cpu));
|
||||
per_cpu(ici_cpuid4_info, cpu) = NULL;
|
||||
}
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
#include <linux/kobject.h>
|
||||
#include <linux/sysfs.h>
|
||||
#include <linux/cpu.h>
|
||||
|
||||
/* pointer to kobject for cpuX/cache */
|
||||
static DEFINE_PER_CPU(struct kobject *, ici_cache_kobject);
|
||||
|
||||
struct _index_kobject {
|
||||
struct kobject kobj;
|
||||
unsigned int cpu;
|
||||
unsigned short index;
|
||||
};
|
||||
|
||||
/* pointer to array of kobjects for cpuX/cache/indexY */
|
||||
static DEFINE_PER_CPU(struct _index_kobject *, ici_index_kobject);
|
||||
#define INDEX_KOBJECT_PTR(x, y) (&((per_cpu(ici_index_kobject, x))[y]))
|
||||
|
||||
#define show_one_plus(file_name, object, val) \
|
||||
static ssize_t show_##file_name(struct _cpuid4_info *this_leaf, char *buf, \
|
||||
unsigned int cpu) \
|
||||
{ \
|
||||
return sprintf(buf, "%lu\n", (unsigned long)this_leaf->object + val); \
|
||||
}
|
||||
|
||||
show_one_plus(level, base.eax.split.level, 0);
|
||||
show_one_plus(coherency_line_size, base.ebx.split.coherency_line_size, 1);
|
||||
show_one_plus(physical_line_partition, base.ebx.split.physical_line_partition, 1);
|
||||
show_one_plus(ways_of_associativity, base.ebx.split.ways_of_associativity, 1);
|
||||
show_one_plus(number_of_sets, base.ecx.split.number_of_sets, 1);
|
||||
|
||||
static ssize_t show_size(struct _cpuid4_info *this_leaf, char *buf,
|
||||
unsigned int cpu)
|
||||
{
|
||||
return sprintf(buf, "%luK\n", this_leaf->base.size / 1024);
|
||||
}
|
||||
|
||||
static ssize_t show_shared_cpu_map_func(struct _cpuid4_info *this_leaf,
|
||||
int type, char *buf)
|
||||
{
|
||||
const struct cpumask *mask = to_cpumask(this_leaf->shared_cpu_map);
|
||||
int ret;
|
||||
|
||||
if (type)
|
||||
ret = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
|
||||
cpumask_pr_args(mask));
|
||||
else
|
||||
ret = scnprintf(buf, PAGE_SIZE - 1, "%*pb",
|
||||
cpumask_pr_args(mask));
|
||||
buf[ret++] = '\n';
|
||||
buf[ret] = '\0';
|
||||
return ret;
|
||||
}
|
||||
|
||||
static inline ssize_t show_shared_cpu_map(struct _cpuid4_info *leaf, char *buf,
|
||||
unsigned int cpu)
|
||||
{
|
||||
return show_shared_cpu_map_func(leaf, 0, buf);
|
||||
}
|
||||
|
||||
static inline ssize_t show_shared_cpu_list(struct _cpuid4_info *leaf, char *buf,
|
||||
unsigned int cpu)
|
||||
{
|
||||
return show_shared_cpu_map_func(leaf, 1, buf);
|
||||
}
|
||||
|
||||
static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf,
|
||||
unsigned int cpu)
|
||||
{
|
||||
switch (this_leaf->base.eax.split.type) {
|
||||
case CACHE_TYPE_DATA:
|
||||
return sprintf(buf, "Data\n");
|
||||
case CACHE_TYPE_INST:
|
||||
return sprintf(buf, "Instruction\n");
|
||||
case CACHE_TYPE_UNIFIED:
|
||||
return sprintf(buf, "Unified\n");
|
||||
default:
|
||||
return sprintf(buf, "Unknown\n");
|
||||
}
|
||||
}
|
||||
|
||||
#define to_object(k) container_of(k, struct _index_kobject, kobj)
|
||||
#define to_attr(a) container_of(a, struct _cache_attr, attr)
|
||||
|
||||
#define define_one_ro(_name) \
|
||||
static struct _cache_attr _name = \
|
||||
__ATTR(_name, 0444, show_##_name, NULL)
|
||||
|
||||
define_one_ro(level);
|
||||
define_one_ro(type);
|
||||
define_one_ro(coherency_line_size);
|
||||
define_one_ro(physical_line_partition);
|
||||
define_one_ro(ways_of_associativity);
|
||||
define_one_ro(number_of_sets);
|
||||
define_one_ro(size);
|
||||
define_one_ro(shared_cpu_map);
|
||||
define_one_ro(shared_cpu_list);
|
||||
|
||||
static struct attribute *default_attrs[] = {
|
||||
&type.attr,
|
||||
&level.attr,
|
||||
&coherency_line_size.attr,
|
||||
&physical_line_partition.attr,
|
||||
&ways_of_associativity.attr,
|
||||
&number_of_sets.attr,
|
||||
&size.attr,
|
||||
&shared_cpu_map.attr,
|
||||
&shared_cpu_list.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
#ifdef CONFIG_AMD_NB
|
||||
static struct attribute **amd_l3_attrs(void)
|
||||
{
|
||||
static struct attribute **attrs;
|
||||
int n;
|
||||
|
||||
if (attrs)
|
||||
return attrs;
|
||||
|
||||
n = ARRAY_SIZE(default_attrs);
|
||||
|
||||
if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE))
|
||||
n += 2;
|
||||
|
||||
if (amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
|
||||
n += 1;
|
||||
|
||||
attrs = kzalloc(n * sizeof (struct attribute *), GFP_KERNEL);
|
||||
if (attrs == NULL)
|
||||
return attrs = default_attrs;
|
||||
|
||||
for (n = 0; default_attrs[n]; n++)
|
||||
attrs[n] = default_attrs[n];
|
||||
|
||||
if (amd_nb_has_feature(AMD_NB_L3_INDEX_DISABLE)) {
|
||||
attrs[n++] = &cache_disable_0.attr;
|
||||
attrs[n++] = &cache_disable_1.attr;
|
||||
}
|
||||
|
||||
if (amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
|
||||
attrs[n++] = &subcaches.attr;
|
||||
|
||||
return attrs;
|
||||
}
|
||||
#endif
|
||||
|
||||
static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
|
||||
{
|
||||
struct _cache_attr *fattr = to_attr(attr);
|
||||
struct _index_kobject *this_leaf = to_object(kobj);
|
||||
ssize_t ret;
|
||||
|
||||
ret = fattr->show ?
|
||||
fattr->show(CPUID4_INFO_IDX(this_leaf->cpu, this_leaf->index),
|
||||
buf, this_leaf->cpu) :
|
||||
0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static ssize_t store(struct kobject *kobj, struct attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct _cache_attr *fattr = to_attr(attr);
|
||||
struct _index_kobject *this_leaf = to_object(kobj);
|
||||
ssize_t ret;
|
||||
|
||||
ret = fattr->store ?
|
||||
fattr->store(CPUID4_INFO_IDX(this_leaf->cpu, this_leaf->index),
|
||||
buf, count, this_leaf->cpu) :
|
||||
0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct sysfs_ops sysfs_ops = {
|
||||
.show = show,
|
||||
.store = store,
|
||||
};
|
||||
|
||||
static struct kobj_type ktype_cache = {
|
||||
.sysfs_ops = &sysfs_ops,
|
||||
.default_attrs = default_attrs,
|
||||
};
|
||||
|
||||
static struct kobj_type ktype_percpu_entry = {
|
||||
.sysfs_ops = &sysfs_ops,
|
||||
};
|
||||
|
||||
static void cpuid4_cache_sysfs_exit(unsigned int cpu)
|
||||
{
|
||||
kfree(per_cpu(ici_cache_kobject, cpu));
|
||||
kfree(per_cpu(ici_index_kobject, cpu));
|
||||
per_cpu(ici_cache_kobject, cpu) = NULL;
|
||||
per_cpu(ici_index_kobject, cpu) = NULL;
|
||||
free_cache_attributes(cpu);
|
||||
}
|
||||
|
||||
static int cpuid4_cache_sysfs_init(unsigned int cpu)
|
||||
{
|
||||
int err;
|
||||
|
||||
if (num_cache_leaves == 0)
|
||||
return -ENOENT;
|
||||
|
||||
err = detect_cache_attributes(cpu);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
/* Allocate all required memory */
|
||||
per_cpu(ici_cache_kobject, cpu) =
|
||||
kzalloc(sizeof(struct kobject), GFP_KERNEL);
|
||||
if (unlikely(per_cpu(ici_cache_kobject, cpu) == NULL))
|
||||
goto err_out;
|
||||
|
||||
per_cpu(ici_index_kobject, cpu) = kzalloc(
|
||||
sizeof(struct _index_kobject) * num_cache_leaves, GFP_KERNEL);
|
||||
if (unlikely(per_cpu(ici_index_kobject, cpu) == NULL))
|
||||
goto err_out;
|
||||
|
||||
return 0;
|
||||
|
||||
err_out:
|
||||
cpuid4_cache_sysfs_exit(cpu);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
static DECLARE_BITMAP(cache_dev_map, NR_CPUS);
|
||||
|
||||
/* Add/Remove cache interface for CPU device */
|
||||
static int cache_add_dev(struct device *dev)
|
||||
{
|
||||
unsigned int cpu = dev->id;
|
||||
unsigned long i, j;
|
||||
struct _index_kobject *this_object;
|
||||
struct _cpuid4_info *this_leaf;
|
||||
int retval;
|
||||
|
||||
retval = cpuid4_cache_sysfs_init(cpu);
|
||||
if (unlikely(retval < 0))
|
||||
return retval;
|
||||
|
||||
retval = kobject_init_and_add(per_cpu(ici_cache_kobject, cpu),
|
||||
&ktype_percpu_entry,
|
||||
&dev->kobj, "%s", "cache");
|
||||
if (retval < 0) {
|
||||
cpuid4_cache_sysfs_exit(cpu);
|
||||
return retval;
|
||||
}
|
||||
|
||||
for (i = 0; i < num_cache_leaves; i++) {
|
||||
this_object = INDEX_KOBJECT_PTR(cpu, i);
|
||||
this_object->cpu = cpu;
|
||||
this_object->index = i;
|
||||
|
||||
this_leaf = CPUID4_INFO_IDX(cpu, i);
|
||||
|
||||
ktype_cache.default_attrs = default_attrs;
|
||||
#ifdef CONFIG_AMD_NB
|
||||
if (this_leaf->base.nb)
|
||||
ktype_cache.default_attrs = amd_l3_attrs();
|
||||
#endif
|
||||
retval = kobject_init_and_add(&(this_object->kobj),
|
||||
&ktype_cache,
|
||||
per_cpu(ici_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(per_cpu(ici_cache_kobject, cpu));
|
||||
cpuid4_cache_sysfs_exit(cpu);
|
||||
return retval;
|
||||
}
|
||||
kobject_uevent(&(this_object->kobj), KOBJ_ADD);
|
||||
}
|
||||
cpumask_set_cpu(cpu, to_cpumask(cache_dev_map));
|
||||
|
||||
kobject_uevent(per_cpu(ici_cache_kobject, cpu), KOBJ_ADD);
|
||||
if (!this_cpu_ci)
|
||||
return -EINVAL;
|
||||
this_cpu_ci->num_levels = 3;
|
||||
this_cpu_ci->num_leaves = num_cache_leaves;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void cache_remove_dev(struct device *dev)
|
||||
static int __populate_cache_leaves(unsigned int cpu)
|
||||
{
|
||||
unsigned int cpu = dev->id;
|
||||
unsigned long i;
|
||||
unsigned int idx, ret;
|
||||
struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu);
|
||||
struct cacheinfo *this_leaf = this_cpu_ci->info_list;
|
||||
struct _cpuid4_info_regs id4_regs = {};
|
||||
|
||||
if (per_cpu(ici_cpuid4_info, cpu) == NULL)
|
||||
return;
|
||||
if (!cpumask_test_cpu(cpu, to_cpumask(cache_dev_map)))
|
||||
return;
|
||||
cpumask_clear_cpu(cpu, to_cpumask(cache_dev_map));
|
||||
|
||||
for (i = 0; i < num_cache_leaves; i++)
|
||||
kobject_put(&(INDEX_KOBJECT_PTR(cpu, i)->kobj));
|
||||
kobject_put(per_cpu(ici_cache_kobject, cpu));
|
||||
cpuid4_cache_sysfs_exit(cpu);
|
||||
}
|
||||
|
||||
static int cacheinfo_cpu_callback(struct notifier_block *nfb,
|
||||
unsigned long action, void *hcpu)
|
||||
{
|
||||
unsigned int cpu = (unsigned long)hcpu;
|
||||
struct device *dev;
|
||||
|
||||
dev = get_cpu_device(cpu);
|
||||
switch (action) {
|
||||
case CPU_ONLINE:
|
||||
case CPU_ONLINE_FROZEN:
|
||||
cache_add_dev(dev);
|
||||
break;
|
||||
case CPU_DEAD:
|
||||
case CPU_DEAD_FROZEN:
|
||||
cache_remove_dev(dev);
|
||||
break;
|
||||
for (idx = 0; idx < this_cpu_ci->num_leaves; idx++) {
|
||||
ret = cpuid4_cache_lookup_regs(idx, &id4_regs);
|
||||
if (ret)
|
||||
return ret;
|
||||
ci_leaf_init(this_leaf++, &id4_regs);
|
||||
__cache_cpumap_setup(cpu, idx, &id4_regs);
|
||||
}
|
||||
return NOTIFY_OK;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct notifier_block cacheinfo_cpu_notifier = {
|
||||
.notifier_call = cacheinfo_cpu_callback,
|
||||
};
|
||||
|
||||
static int __init cache_sysfs_init(void)
|
||||
{
|
||||
int i, err = 0;
|
||||
|
||||
if (num_cache_leaves == 0)
|
||||
return 0;
|
||||
|
||||
cpu_notifier_register_begin();
|
||||
for_each_online_cpu(i) {
|
||||
struct device *dev = get_cpu_device(i);
|
||||
|
||||
err = cache_add_dev(dev);
|
||||
if (err)
|
||||
goto out;
|
||||
}
|
||||
__register_hotcpu_notifier(&cacheinfo_cpu_notifier);
|
||||
|
||||
out:
|
||||
cpu_notifier_register_done();
|
||||
return err;
|
||||
}
|
||||
|
||||
device_initcall(cache_sysfs_init);
|
||||
|
||||
#endif
|
||||
DEFINE_SMP_CALL_CACHE_FUNCTION(init_cache_level)
|
||||
DEFINE_SMP_CALL_CACHE_FUNCTION(populate_cache_leaves)
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче