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420 lines
9.9 KiB
420 lines
9.9 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* This file contains NUMA specific variables and functions which can |
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* be split away from DISCONTIGMEM and are used on NUMA machines with |
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* contiguous memory. |
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* 2002/08/07 Erich Focht <[email protected]> |
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* Populate cpu entries in sysfs for non-numa systems as well |
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* Intel Corporation - Ashok Raj |
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* 02/27/2006 Zhang, Yanmin |
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* Populate cpu cache entries in sysfs for cpu cache info |
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*/ |
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#include <linux/cpu.h> |
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#include <linux/kernel.h> |
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#include <linux/mm.h> |
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#include <linux/node.h> |
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#include <linux/slab.h> |
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#include <linux/init.h> |
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#include <linux/memblock.h> |
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#include <linux/nodemask.h> |
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#include <linux/notifier.h> |
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#include <linux/export.h> |
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#include <asm/mmzone.h> |
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#include <asm/numa.h> |
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#include <asm/cpu.h> |
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static struct ia64_cpu *sysfs_cpus; |
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void arch_fix_phys_package_id(int num, u32 slot) |
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{ |
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#ifdef CONFIG_SMP |
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if (cpu_data(num)->socket_id == -1) |
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cpu_data(num)->socket_id = slot; |
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#endif |
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} |
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EXPORT_SYMBOL_GPL(arch_fix_phys_package_id); |
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#ifdef CONFIG_HOTPLUG_CPU |
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int __ref arch_register_cpu(int num) |
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{ |
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/* |
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* If CPEI can be re-targeted or if this is not |
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* CPEI target, then it is hotpluggable |
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*/ |
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if (can_cpei_retarget() || !is_cpu_cpei_target(num)) |
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sysfs_cpus[num].cpu.hotpluggable = 1; |
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map_cpu_to_node(num, node_cpuid[num].nid); |
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return register_cpu(&sysfs_cpus[num].cpu, num); |
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} |
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EXPORT_SYMBOL(arch_register_cpu); |
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void __ref arch_unregister_cpu(int num) |
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{ |
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unregister_cpu(&sysfs_cpus[num].cpu); |
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unmap_cpu_from_node(num, cpu_to_node(num)); |
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} |
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EXPORT_SYMBOL(arch_unregister_cpu); |
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#else |
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static int __init arch_register_cpu(int num) |
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{ |
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return register_cpu(&sysfs_cpus[num].cpu, num); |
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} |
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#endif /*CONFIG_HOTPLUG_CPU*/ |
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static int __init topology_init(void) |
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{ |
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int i, err = 0; |
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#ifdef CONFIG_NUMA |
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/* |
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* MCD - Do we want to register all ONLINE nodes, or all POSSIBLE nodes? |
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*/ |
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for_each_online_node(i) { |
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if ((err = register_one_node(i))) |
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goto out; |
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} |
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#endif |
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sysfs_cpus = kcalloc(NR_CPUS, sizeof(struct ia64_cpu), GFP_KERNEL); |
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if (!sysfs_cpus) |
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panic("kzalloc in topology_init failed - NR_CPUS too big?"); |
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for_each_present_cpu(i) { |
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if((err = arch_register_cpu(i))) |
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goto out; |
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} |
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out: |
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return err; |
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} |
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subsys_initcall(topology_init); |
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/* |
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* Export cpu cache information through sysfs |
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*/ |
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/* |
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* A bunch of string array to get pretty printing |
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*/ |
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static const char *cache_types[] = { |
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"", /* not used */ |
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"Instruction", |
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"Data", |
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"Unified" /* unified */ |
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}; |
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static const char *cache_mattrib[]={ |
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"WriteThrough", |
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"WriteBack", |
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"", /* reserved */ |
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"" /* reserved */ |
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}; |
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struct cache_info { |
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pal_cache_config_info_t cci; |
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cpumask_t shared_cpu_map; |
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int level; |
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int type; |
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struct kobject kobj; |
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}; |
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struct cpu_cache_info { |
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struct cache_info *cache_leaves; |
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int num_cache_leaves; |
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struct kobject kobj; |
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}; |
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static struct cpu_cache_info all_cpu_cache_info[NR_CPUS]; |
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#define LEAF_KOBJECT_PTR(x,y) (&all_cpu_cache_info[x].cache_leaves[y]) |
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#ifdef CONFIG_SMP |
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static void cache_shared_cpu_map_setup(unsigned int cpu, |
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struct cache_info * this_leaf) |
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{ |
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pal_cache_shared_info_t csi; |
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int num_shared, i = 0; |
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unsigned int j; |
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if (cpu_data(cpu)->threads_per_core <= 1 && |
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cpu_data(cpu)->cores_per_socket <= 1) { |
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cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); |
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return; |
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} |
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if (ia64_pal_cache_shared_info(this_leaf->level, |
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this_leaf->type, |
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0, |
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&csi) != PAL_STATUS_SUCCESS) |
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return; |
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num_shared = (int) csi.num_shared; |
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do { |
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for_each_possible_cpu(j) |
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if (cpu_data(cpu)->socket_id == cpu_data(j)->socket_id |
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&& cpu_data(j)->core_id == csi.log1_cid |
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&& cpu_data(j)->thread_id == csi.log1_tid) |
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cpumask_set_cpu(j, &this_leaf->shared_cpu_map); |
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i++; |
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} while (i < num_shared && |
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ia64_pal_cache_shared_info(this_leaf->level, |
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this_leaf->type, |
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i, |
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&csi) == PAL_STATUS_SUCCESS); |
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} |
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#else |
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static void cache_shared_cpu_map_setup(unsigned int cpu, |
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struct cache_info * this_leaf) |
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{ |
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cpumask_set_cpu(cpu, &this_leaf->shared_cpu_map); |
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return; |
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} |
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#endif |
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static ssize_t show_coherency_line_size(struct cache_info *this_leaf, |
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char *buf) |
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{ |
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return sprintf(buf, "%u\n", 1 << this_leaf->cci.pcci_line_size); |
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} |
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static ssize_t show_ways_of_associativity(struct cache_info *this_leaf, |
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char *buf) |
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{ |
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return sprintf(buf, "%u\n", this_leaf->cci.pcci_assoc); |
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} |
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static ssize_t show_attributes(struct cache_info *this_leaf, char *buf) |
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{ |
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return sprintf(buf, |
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"%s\n", |
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cache_mattrib[this_leaf->cci.pcci_cache_attr]); |
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} |
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static ssize_t show_size(struct cache_info *this_leaf, char *buf) |
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{ |
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return sprintf(buf, "%uK\n", this_leaf->cci.pcci_cache_size / 1024); |
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} |
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static ssize_t show_number_of_sets(struct cache_info *this_leaf, char *buf) |
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{ |
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unsigned number_of_sets = this_leaf->cci.pcci_cache_size; |
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number_of_sets /= this_leaf->cci.pcci_assoc; |
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number_of_sets /= 1 << this_leaf->cci.pcci_line_size; |
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return sprintf(buf, "%u\n", number_of_sets); |
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} |
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static ssize_t show_shared_cpu_map(struct cache_info *this_leaf, char *buf) |
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{ |
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cpumask_t shared_cpu_map; |
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cpumask_and(&shared_cpu_map, |
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&this_leaf->shared_cpu_map, cpu_online_mask); |
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return scnprintf(buf, PAGE_SIZE, "%*pb\n", |
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cpumask_pr_args(&shared_cpu_map)); |
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} |
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static ssize_t show_type(struct cache_info *this_leaf, char *buf) |
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{ |
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int type = this_leaf->type + this_leaf->cci.pcci_unified; |
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return sprintf(buf, "%s\n", cache_types[type]); |
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} |
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static ssize_t show_level(struct cache_info *this_leaf, char *buf) |
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{ |
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return sprintf(buf, "%u\n", this_leaf->level); |
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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 cache_info *, char *); |
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ssize_t (*store)(struct cache_info *, const char *, size_t count); |
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}; |
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#ifdef define_one_ro |
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#undef define_one_ro |
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#endif |
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#define define_one_ro(_name) \ |
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static struct cache_attr _name = \ |
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__ATTR(_name, 0444, show_##_name, NULL) |
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define_one_ro(level); |
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define_one_ro(type); |
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define_one_ro(coherency_line_size); |
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define_one_ro(ways_of_associativity); |
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define_one_ro(size); |
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define_one_ro(number_of_sets); |
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define_one_ro(shared_cpu_map); |
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define_one_ro(attributes); |
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static struct attribute * cache_default_attrs[] = { |
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&type.attr, |
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&level.attr, |
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&coherency_line_size.attr, |
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&ways_of_associativity.attr, |
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&attributes.attr, |
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&size.attr, |
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&number_of_sets.attr, |
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&shared_cpu_map.attr, |
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NULL |
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}; |
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#define to_object(k) container_of(k, struct cache_info, kobj) |
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#define to_attr(a) container_of(a, struct cache_attr, attr) |
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static ssize_t ia64_cache_show(struct kobject * kobj, struct attribute * attr, char * buf) |
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{ |
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struct cache_attr *fattr = to_attr(attr); |
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struct cache_info *this_leaf = to_object(kobj); |
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ssize_t ret; |
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ret = fattr->show ? fattr->show(this_leaf, buf) : 0; |
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return ret; |
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} |
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static const struct sysfs_ops cache_sysfs_ops = { |
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.show = ia64_cache_show |
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}; |
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static struct kobj_type cache_ktype = { |
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.sysfs_ops = &cache_sysfs_ops, |
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.default_attrs = cache_default_attrs, |
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}; |
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static struct kobj_type cache_ktype_percpu_entry = { |
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.sysfs_ops = &cache_sysfs_ops, |
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}; |
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static void cpu_cache_sysfs_exit(unsigned int cpu) |
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{ |
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kfree(all_cpu_cache_info[cpu].cache_leaves); |
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all_cpu_cache_info[cpu].cache_leaves = NULL; |
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all_cpu_cache_info[cpu].num_cache_leaves = 0; |
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memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); |
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return; |
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} |
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static int cpu_cache_sysfs_init(unsigned int cpu) |
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{ |
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unsigned long i, levels, unique_caches; |
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pal_cache_config_info_t cci; |
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int j; |
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long status; |
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struct cache_info *this_cache; |
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int num_cache_leaves = 0; |
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if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) { |
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printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status); |
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return -1; |
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} |
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this_cache=kcalloc(unique_caches, sizeof(struct cache_info), |
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GFP_KERNEL); |
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if (this_cache == NULL) |
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return -ENOMEM; |
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for (i=0; i < levels; i++) { |
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for (j=2; j >0 ; j--) { |
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if ((status=ia64_pal_cache_config_info(i,j, &cci)) != |
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PAL_STATUS_SUCCESS) |
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continue; |
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this_cache[num_cache_leaves].cci = cci; |
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this_cache[num_cache_leaves].level = i + 1; |
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this_cache[num_cache_leaves].type = j; |
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cache_shared_cpu_map_setup(cpu, |
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&this_cache[num_cache_leaves]); |
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num_cache_leaves ++; |
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} |
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} |
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all_cpu_cache_info[cpu].cache_leaves = this_cache; |
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all_cpu_cache_info[cpu].num_cache_leaves = num_cache_leaves; |
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memset(&all_cpu_cache_info[cpu].kobj, 0, sizeof(struct kobject)); |
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return 0; |
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} |
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/* Add cache interface for CPU device */ |
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static int cache_add_dev(unsigned int cpu) |
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{ |
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struct device *sys_dev = get_cpu_device(cpu); |
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unsigned long i, j; |
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struct cache_info *this_object; |
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int retval = 0; |
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if (all_cpu_cache_info[cpu].kobj.parent) |
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return 0; |
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retval = cpu_cache_sysfs_init(cpu); |
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if (unlikely(retval < 0)) |
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return retval; |
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retval = kobject_init_and_add(&all_cpu_cache_info[cpu].kobj, |
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&cache_ktype_percpu_entry, &sys_dev->kobj, |
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"%s", "cache"); |
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if (unlikely(retval < 0)) { |
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cpu_cache_sysfs_exit(cpu); |
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return retval; |
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} |
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for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) { |
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this_object = LEAF_KOBJECT_PTR(cpu,i); |
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retval = kobject_init_and_add(&(this_object->kobj), |
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&cache_ktype, |
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&all_cpu_cache_info[cpu].kobj, |
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"index%1lu", i); |
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if (unlikely(retval)) { |
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for (j = 0; j < i; j++) { |
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kobject_put(&(LEAF_KOBJECT_PTR(cpu,j)->kobj)); |
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} |
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kobject_put(&all_cpu_cache_info[cpu].kobj); |
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cpu_cache_sysfs_exit(cpu); |
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return retval; |
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} |
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kobject_uevent(&(this_object->kobj), KOBJ_ADD); |
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} |
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kobject_uevent(&all_cpu_cache_info[cpu].kobj, KOBJ_ADD); |
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return retval; |
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} |
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/* Remove cache interface for CPU device */ |
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static int cache_remove_dev(unsigned int cpu) |
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{ |
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unsigned long i; |
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for (i = 0; i < all_cpu_cache_info[cpu].num_cache_leaves; i++) |
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kobject_put(&(LEAF_KOBJECT_PTR(cpu,i)->kobj)); |
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if (all_cpu_cache_info[cpu].kobj.parent) { |
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kobject_put(&all_cpu_cache_info[cpu].kobj); |
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memset(&all_cpu_cache_info[cpu].kobj, |
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0, |
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sizeof(struct kobject)); |
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} |
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cpu_cache_sysfs_exit(cpu); |
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return 0; |
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} |
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static int __init cache_sysfs_init(void) |
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{ |
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int ret; |
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ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "ia64/topology:online", |
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cache_add_dev, cache_remove_dev); |
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WARN_ON(ret < 0); |
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return 0; |
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} |
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device_initcall(cache_sysfs_init);
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