+++ /dev/null
-/* sysfs.c: Toplogy sysfs support code for sparc64.
- *
- * Copyright (C) 2007 David S. Miller <davem@davemloft.net>
- */
-#include <linux/sysdev.h>
-#include <linux/cpu.h>
-#include <linux/smp.h>
-#include <linux/percpu.h>
-#include <linux/init.h>
-
-#include <asm/hypervisor.h>
-#include <asm/spitfire.h>
-
-static DEFINE_PER_CPU(struct hv_mmu_statistics, mmu_stats) __attribute__((aligned(64)));
-
-#define SHOW_MMUSTAT_ULONG(NAME) \
-static ssize_t show_##NAME(struct sys_device *dev, \
- struct sysdev_attribute *attr, char *buf) \
-{ \
- struct hv_mmu_statistics *p = &per_cpu(mmu_stats, dev->id); \
- return sprintf(buf, "%lu\n", p->NAME); \
-} \
-static SYSDEV_ATTR(NAME, 0444, show_##NAME, NULL)
-
-SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_8k_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_8k_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_64k_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_64k_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_4mb_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_4mb_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctx0_256mb_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctx0_256mb_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_8k_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_8k_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_64k_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_64k_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_4mb_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_4mb_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_hits_ctxnon0_256mb_tte);
-SHOW_MMUSTAT_ULONG(immu_tsb_ticks_ctxnon0_256mb_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_8k_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_8k_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_64k_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_64k_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_4mb_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_4mb_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctx0_256mb_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctx0_256mb_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_8k_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_8k_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_64k_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_64k_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_4mb_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_4mb_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_hits_ctxnon0_256mb_tte);
-SHOW_MMUSTAT_ULONG(dmmu_tsb_ticks_ctxnon0_256mb_tte);
-
-static struct attribute *mmu_stat_attrs[] = {
- &attr_immu_tsb_hits_ctx0_8k_tte.attr,
- &attr_immu_tsb_ticks_ctx0_8k_tte.attr,
- &attr_immu_tsb_hits_ctx0_64k_tte.attr,
- &attr_immu_tsb_ticks_ctx0_64k_tte.attr,
- &attr_immu_tsb_hits_ctx0_4mb_tte.attr,
- &attr_immu_tsb_ticks_ctx0_4mb_tte.attr,
- &attr_immu_tsb_hits_ctx0_256mb_tte.attr,
- &attr_immu_tsb_ticks_ctx0_256mb_tte.attr,
- &attr_immu_tsb_hits_ctxnon0_8k_tte.attr,
- &attr_immu_tsb_ticks_ctxnon0_8k_tte.attr,
- &attr_immu_tsb_hits_ctxnon0_64k_tte.attr,
- &attr_immu_tsb_ticks_ctxnon0_64k_tte.attr,
- &attr_immu_tsb_hits_ctxnon0_4mb_tte.attr,
- &attr_immu_tsb_ticks_ctxnon0_4mb_tte.attr,
- &attr_immu_tsb_hits_ctxnon0_256mb_tte.attr,
- &attr_immu_tsb_ticks_ctxnon0_256mb_tte.attr,
- &attr_dmmu_tsb_hits_ctx0_8k_tte.attr,
- &attr_dmmu_tsb_ticks_ctx0_8k_tte.attr,
- &attr_dmmu_tsb_hits_ctx0_64k_tte.attr,
- &attr_dmmu_tsb_ticks_ctx0_64k_tte.attr,
- &attr_dmmu_tsb_hits_ctx0_4mb_tte.attr,
- &attr_dmmu_tsb_ticks_ctx0_4mb_tte.attr,
- &attr_dmmu_tsb_hits_ctx0_256mb_tte.attr,
- &attr_dmmu_tsb_ticks_ctx0_256mb_tte.attr,
- &attr_dmmu_tsb_hits_ctxnon0_8k_tte.attr,
- &attr_dmmu_tsb_ticks_ctxnon0_8k_tte.attr,
- &attr_dmmu_tsb_hits_ctxnon0_64k_tte.attr,
- &attr_dmmu_tsb_ticks_ctxnon0_64k_tte.attr,
- &attr_dmmu_tsb_hits_ctxnon0_4mb_tte.attr,
- &attr_dmmu_tsb_ticks_ctxnon0_4mb_tte.attr,
- &attr_dmmu_tsb_hits_ctxnon0_256mb_tte.attr,
- &attr_dmmu_tsb_ticks_ctxnon0_256mb_tte.attr,
- NULL,
-};
-
-static struct attribute_group mmu_stat_group = {
- .attrs = mmu_stat_attrs,
- .name = "mmu_stats",
-};
-
-/* XXX convert to rusty's on_one_cpu */
-static unsigned long run_on_cpu(unsigned long cpu,
- unsigned long (*func)(unsigned long),
- unsigned long arg)
-{
- cpumask_t old_affinity = current->cpus_allowed;
- unsigned long ret;
-
- /* should return -EINVAL to userspace */
- if (set_cpus_allowed(current, cpumask_of_cpu(cpu)))
- return 0;
-
- ret = func(arg);
-
- set_cpus_allowed(current, old_affinity);
-
- return ret;
-}
-
-static unsigned long read_mmustat_enable(unsigned long junk)
-{
- unsigned long ra = 0;
-
- sun4v_mmustat_info(&ra);
-
- return ra != 0;
-}
-
-static unsigned long write_mmustat_enable(unsigned long val)
-{
- unsigned long ra, orig_ra;
-
- if (val)
- ra = __pa(&per_cpu(mmu_stats, smp_processor_id()));
- else
- ra = 0UL;
-
- return sun4v_mmustat_conf(ra, &orig_ra);
-}
-
-static ssize_t show_mmustat_enable(struct sys_device *s,
- struct sysdev_attribute *attr, char *buf)
-{
- unsigned long val = run_on_cpu(s->id, read_mmustat_enable, 0);
- return sprintf(buf, "%lx\n", val);
-}
-
-static ssize_t store_mmustat_enable(struct sys_device *s,
- struct sysdev_attribute *attr, const char *buf,
- size_t count)
-{
- unsigned long val, err;
- int ret = sscanf(buf, "%ld", &val);
-
- if (ret != 1)
- return -EINVAL;
-
- err = run_on_cpu(s->id, write_mmustat_enable, val);
- if (err)
- return -EIO;
-
- return count;
-}
-
-static SYSDEV_ATTR(mmustat_enable, 0644, show_mmustat_enable, store_mmustat_enable);
-
-static int mmu_stats_supported;
-
-static int register_mmu_stats(struct sys_device *s)
-{
- if (!mmu_stats_supported)
- return 0;
- sysdev_create_file(s, &attr_mmustat_enable);
- return sysfs_create_group(&s->kobj, &mmu_stat_group);
-}
-
-#ifdef CONFIG_HOTPLUG_CPU
-static void unregister_mmu_stats(struct sys_device *s)
-{
- if (!mmu_stats_supported)
- return;
- sysfs_remove_group(&s->kobj, &mmu_stat_group);
- sysdev_remove_file(s, &attr_mmustat_enable);
-}
-#endif
-
-#define SHOW_CPUDATA_ULONG_NAME(NAME, MEMBER) \
-static ssize_t show_##NAME(struct sys_device *dev, \
- struct sysdev_attribute *attr, char *buf) \
-{ \
- cpuinfo_sparc *c = &cpu_data(dev->id); \
- return sprintf(buf, "%lu\n", c->MEMBER); \
-}
-
-#define SHOW_CPUDATA_UINT_NAME(NAME, MEMBER) \
-static ssize_t show_##NAME(struct sys_device *dev, \
- struct sysdev_attribute *attr, char *buf) \
-{ \
- cpuinfo_sparc *c = &cpu_data(dev->id); \
- return sprintf(buf, "%u\n", c->MEMBER); \
-}
-
-SHOW_CPUDATA_ULONG_NAME(clock_tick, clock_tick);
-SHOW_CPUDATA_UINT_NAME(l1_dcache_size, dcache_size);
-SHOW_CPUDATA_UINT_NAME(l1_dcache_line_size, dcache_line_size);
-SHOW_CPUDATA_UINT_NAME(l1_icache_size, icache_size);
-SHOW_CPUDATA_UINT_NAME(l1_icache_line_size, icache_line_size);
-SHOW_CPUDATA_UINT_NAME(l2_cache_size, ecache_size);
-SHOW_CPUDATA_UINT_NAME(l2_cache_line_size, ecache_line_size);
-
-static struct sysdev_attribute cpu_core_attrs[] = {
- _SYSDEV_ATTR(clock_tick, 0444, show_clock_tick, NULL),
- _SYSDEV_ATTR(l1_dcache_size, 0444, show_l1_dcache_size, NULL),
- _SYSDEV_ATTR(l1_dcache_line_size, 0444, show_l1_dcache_line_size, NULL),
- _SYSDEV_ATTR(l1_icache_size, 0444, show_l1_icache_size, NULL),
- _SYSDEV_ATTR(l1_icache_line_size, 0444, show_l1_icache_line_size, NULL),
- _SYSDEV_ATTR(l2_cache_size, 0444, show_l2_cache_size, NULL),
- _SYSDEV_ATTR(l2_cache_line_size, 0444, show_l2_cache_line_size, NULL),
-};
-
-static DEFINE_PER_CPU(struct cpu, cpu_devices);
-
-static void register_cpu_online(unsigned int cpu)
-{
- struct cpu *c = &per_cpu(cpu_devices, cpu);
- struct sys_device *s = &c->sysdev;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
- sysdev_create_file(s, &cpu_core_attrs[i]);
-
- register_mmu_stats(s);
-}
-
-#ifdef CONFIG_HOTPLUG_CPU
-static void unregister_cpu_online(unsigned int cpu)
-{
- struct cpu *c = &per_cpu(cpu_devices, cpu);
- struct sys_device *s = &c->sysdev;
- int i;
-
- unregister_mmu_stats(s);
- for (i = 0; i < ARRAY_SIZE(cpu_core_attrs); i++)
- sysdev_remove_file(s, &cpu_core_attrs[i]);
-}
-#endif
-
-static int __cpuinit sysfs_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned int)(long)hcpu;
-
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- register_cpu_online(cpu);
- break;
-#ifdef CONFIG_HOTPLUG_CPU
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- unregister_cpu_online(cpu);
- break;
-#endif
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
- .notifier_call = sysfs_cpu_notify,
-};
-
-static void __init check_mmu_stats(void)
-{
- unsigned long dummy1, err;
-
- if (tlb_type != hypervisor)
- return;
-
- err = sun4v_mmustat_info(&dummy1);
- if (!err)
- mmu_stats_supported = 1;
-}
-
-static void register_nodes(void)
-{
-#ifdef CONFIG_NUMA
- int i;
-
- for (i = 0; i < MAX_NUMNODES; i++)
- register_one_node(i);
-#endif
-}
-
-static int __init topology_init(void)
-{
- int cpu;
-
- register_nodes();
-
- check_mmu_stats();
-
- register_cpu_notifier(&sysfs_cpu_nb);
-
- for_each_possible_cpu(cpu) {
- struct cpu *c = &per_cpu(cpu_devices, cpu);
-
- register_cpu(c, cpu);
- if (cpu_online(cpu))
- register_cpu_online(cpu);
- }
-
- return 0;
-}
-
-subsys_initcall(topology_init);
git.samba.org / sfrench / cifs-2.6.git / blobdiff