+++ /dev/null
-#include <linux/config.h>
-#include <linux/sysdev.h>
-#include <linux/cpu.h>
-#include <linux/smp.h>
-#include <linux/percpu.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/module.h>
-#include <linux/nodemask.h>
-#include <linux/cpumask.h>
-#include <linux/notifier.h>
-
-#include <asm/current.h>
-#include <asm/processor.h>
-#include <asm/cputable.h>
-#include <asm/firmware.h>
-#include <asm/hvcall.h>
-#include <asm/prom.h>
-#include <asm/systemcfg.h>
-#include <asm/paca.h>
-#include <asm/lppaca.h>
-#include <asm/machdep.h>
-#include <asm/smp.h>
-
-static DEFINE_PER_CPU(struct cpu, cpu_devices);
-
-/* SMT stuff */
-
-#ifdef CONFIG_PPC_MULTIPLATFORM
-/* default to snooze disabled */
-DEFINE_PER_CPU(unsigned long, smt_snooze_delay);
-
-static ssize_t store_smt_snooze_delay(struct sys_device *dev, const char *buf,
- size_t count)
-{
- struct cpu *cpu = container_of(dev, struct cpu, sysdev);
- ssize_t ret;
- unsigned long snooze;
-
- ret = sscanf(buf, "%lu", &snooze);
- if (ret != 1)
- return -EINVAL;
-
- per_cpu(smt_snooze_delay, cpu->sysdev.id) = snooze;
-
- return count;
-}
-
-static ssize_t show_smt_snooze_delay(struct sys_device *dev, char *buf)
-{
- struct cpu *cpu = container_of(dev, struct cpu, sysdev);
-
- return sprintf(buf, "%lu\n", per_cpu(smt_snooze_delay, cpu->sysdev.id));
-}
-
-static SYSDEV_ATTR(smt_snooze_delay, 0644, show_smt_snooze_delay,
- store_smt_snooze_delay);
-
-/* Only parse OF options if the matching cmdline option was not specified */
-static int smt_snooze_cmdline;
-
-static int __init smt_setup(void)
-{
- struct device_node *options;
- unsigned int *val;
- unsigned int cpu;
-
- if (!cpu_has_feature(CPU_FTR_SMT))
- return 1;
-
- options = find_path_device("/options");
- if (!options)
- return 1;
-
- val = (unsigned int *)get_property(options, "ibm,smt-snooze-delay",
- NULL);
- if (!smt_snooze_cmdline && val) {
- for_each_cpu(cpu)
- per_cpu(smt_snooze_delay, cpu) = *val;
- }
-
- return 1;
-}
-__initcall(smt_setup);
-
-static int __init setup_smt_snooze_delay(char *str)
-{
- unsigned int cpu;
- int snooze;
-
- if (!cpu_has_feature(CPU_FTR_SMT))
- return 1;
-
- smt_snooze_cmdline = 1;
-
- if (get_option(&str, &snooze)) {
- for_each_cpu(cpu)
- per_cpu(smt_snooze_delay, cpu) = snooze;
- }
-
- return 1;
-}
-__setup("smt-snooze-delay=", setup_smt_snooze_delay);
-
-#endif /* CONFIG_PPC_MULTIPLATFORM */
-
-/*
- * Enabling PMCs will slow partition context switch times so we only do
- * it the first time we write to the PMCs.
- */
-
-static DEFINE_PER_CPU(char, pmcs_enabled);
-
-void ppc64_enable_pmcs(void)
-{
- /* Only need to enable them once */
- if (__get_cpu_var(pmcs_enabled))
- return;
-
- __get_cpu_var(pmcs_enabled) = 1;
-
- if (ppc_md.enable_pmcs)
- ppc_md.enable_pmcs();
-}
-EXPORT_SYMBOL(ppc64_enable_pmcs);
-
-/* 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;
-}
-
-#define SYSFS_PMCSETUP(NAME, ADDRESS) \
-static unsigned long read_##NAME(unsigned long junk) \
-{ \
- return mfspr(ADDRESS); \
-} \
-static unsigned long write_##NAME(unsigned long val) \
-{ \
- ppc64_enable_pmcs(); \
- mtspr(ADDRESS, val); \
- return 0; \
-} \
-static ssize_t show_##NAME(struct sys_device *dev, char *buf) \
-{ \
- struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
- unsigned long val = run_on_cpu(cpu->sysdev.id, read_##NAME, 0); \
- return sprintf(buf, "%lx\n", val); \
-} \
-static ssize_t __attribute_used__ \
- store_##NAME(struct sys_device *dev, const char *buf, size_t count) \
-{ \
- struct cpu *cpu = container_of(dev, struct cpu, sysdev); \
- unsigned long val; \
- int ret = sscanf(buf, "%lx", &val); \
- if (ret != 1) \
- return -EINVAL; \
- run_on_cpu(cpu->sysdev.id, write_##NAME, val); \
- return count; \
-}
-
-SYSFS_PMCSETUP(mmcr0, SPRN_MMCR0);
-SYSFS_PMCSETUP(mmcr1, SPRN_MMCR1);
-SYSFS_PMCSETUP(mmcra, SPRN_MMCRA);
-SYSFS_PMCSETUP(pmc1, SPRN_PMC1);
-SYSFS_PMCSETUP(pmc2, SPRN_PMC2);
-SYSFS_PMCSETUP(pmc3, SPRN_PMC3);
-SYSFS_PMCSETUP(pmc4, SPRN_PMC4);
-SYSFS_PMCSETUP(pmc5, SPRN_PMC5);
-SYSFS_PMCSETUP(pmc6, SPRN_PMC6);
-SYSFS_PMCSETUP(pmc7, SPRN_PMC7);
-SYSFS_PMCSETUP(pmc8, SPRN_PMC8);
-SYSFS_PMCSETUP(purr, SPRN_PURR);
-
-static SYSDEV_ATTR(mmcr0, 0600, show_mmcr0, store_mmcr0);
-static SYSDEV_ATTR(mmcr1, 0600, show_mmcr1, store_mmcr1);
-static SYSDEV_ATTR(mmcra, 0600, show_mmcra, store_mmcra);
-static SYSDEV_ATTR(pmc1, 0600, show_pmc1, store_pmc1);
-static SYSDEV_ATTR(pmc2, 0600, show_pmc2, store_pmc2);
-static SYSDEV_ATTR(pmc3, 0600, show_pmc3, store_pmc3);
-static SYSDEV_ATTR(pmc4, 0600, show_pmc4, store_pmc4);
-static SYSDEV_ATTR(pmc5, 0600, show_pmc5, store_pmc5);
-static SYSDEV_ATTR(pmc6, 0600, show_pmc6, store_pmc6);
-static SYSDEV_ATTR(pmc7, 0600, show_pmc7, store_pmc7);
-static SYSDEV_ATTR(pmc8, 0600, show_pmc8, store_pmc8);
-static SYSDEV_ATTR(purr, 0600, show_purr, NULL);
-
-static void register_cpu_online(unsigned int cpu)
-{
- struct cpu *c = &per_cpu(cpu_devices, cpu);
- struct sys_device *s = &c->sysdev;
-
-#ifndef CONFIG_PPC_ISERIES
- if (cpu_has_feature(CPU_FTR_SMT))
- sysdev_create_file(s, &attr_smt_snooze_delay);
-#endif
-
- /* PMC stuff */
-
- sysdev_create_file(s, &attr_mmcr0);
- sysdev_create_file(s, &attr_mmcr1);
-
- if (cpu_has_feature(CPU_FTR_MMCRA))
- sysdev_create_file(s, &attr_mmcra);
-
- if (cur_cpu_spec->num_pmcs >= 1)
- sysdev_create_file(s, &attr_pmc1);
- if (cur_cpu_spec->num_pmcs >= 2)
- sysdev_create_file(s, &attr_pmc2);
- if (cur_cpu_spec->num_pmcs >= 3)
- sysdev_create_file(s, &attr_pmc3);
- if (cur_cpu_spec->num_pmcs >= 4)
- sysdev_create_file(s, &attr_pmc4);
- if (cur_cpu_spec->num_pmcs >= 5)
- sysdev_create_file(s, &attr_pmc5);
- if (cur_cpu_spec->num_pmcs >= 6)
- sysdev_create_file(s, &attr_pmc6);
- if (cur_cpu_spec->num_pmcs >= 7)
- sysdev_create_file(s, &attr_pmc7);
- if (cur_cpu_spec->num_pmcs >= 8)
- sysdev_create_file(s, &attr_pmc8);
-
- if (cpu_has_feature(CPU_FTR_SMT))
- sysdev_create_file(s, &attr_purr);
-}
-
-#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;
-
- BUG_ON(c->no_control);
-
-#ifndef CONFIG_PPC_ISERIES
- if (cpu_has_feature(CPU_FTR_SMT))
- sysdev_remove_file(s, &attr_smt_snooze_delay);
-#endif
-
- /* PMC stuff */
-
- sysdev_remove_file(s, &attr_mmcr0);
- sysdev_remove_file(s, &attr_mmcr1);
-
- if (cpu_has_feature(CPU_FTR_MMCRA))
- sysdev_remove_file(s, &attr_mmcra);
-
- if (cur_cpu_spec->num_pmcs >= 1)
- sysdev_remove_file(s, &attr_pmc1);
- if (cur_cpu_spec->num_pmcs >= 2)
- sysdev_remove_file(s, &attr_pmc2);
- if (cur_cpu_spec->num_pmcs >= 3)
- sysdev_remove_file(s, &attr_pmc3);
- if (cur_cpu_spec->num_pmcs >= 4)
- sysdev_remove_file(s, &attr_pmc4);
- if (cur_cpu_spec->num_pmcs >= 5)
- sysdev_remove_file(s, &attr_pmc5);
- if (cur_cpu_spec->num_pmcs >= 6)
- sysdev_remove_file(s, &attr_pmc6);
- if (cur_cpu_spec->num_pmcs >= 7)
- sysdev_remove_file(s, &attr_pmc7);
- if (cur_cpu_spec->num_pmcs >= 8)
- sysdev_remove_file(s, &attr_pmc8);
-
- if (cpu_has_feature(CPU_FTR_SMT))
- sysdev_remove_file(s, &attr_purr);
-}
-#endif /* CONFIG_HOTPLUG_CPU */
-
-static int __devinit sysfs_cpu_notify(struct notifier_block *self,
- unsigned long action, void *hcpu)
-{
- unsigned int cpu = (unsigned int)(long)hcpu;
-
- switch (action) {
- case CPU_ONLINE:
- register_cpu_online(cpu);
- break;
-#ifdef CONFIG_HOTPLUG_CPU
- case CPU_DEAD:
- unregister_cpu_online(cpu);
- break;
-#endif
- }
- return NOTIFY_OK;
-}
-
-static struct notifier_block __devinitdata sysfs_cpu_nb = {
- .notifier_call = sysfs_cpu_notify,
-};
-
-/* NUMA stuff */
-
-#ifdef CONFIG_NUMA
-static struct node node_devices[MAX_NUMNODES];
-
-static void register_nodes(void)
-{
- int i;
-
- for (i = 0; i < MAX_NUMNODES; i++) {
- if (node_online(i)) {
- int p_node = parent_node(i);
- struct node *parent = NULL;
-
- if (p_node != i)
- parent = &node_devices[p_node];
-
- register_node(&node_devices[i], i, parent);
- }
- }
-}
-#else
-static void register_nodes(void)
-{
- return;
-}
-#endif
-
-/* Only valid if CPU is present. */
-static ssize_t show_physical_id(struct sys_device *dev, char *buf)
-{
- struct cpu *cpu = container_of(dev, struct cpu, sysdev);
-
- return sprintf(buf, "%d\n", get_hard_smp_processor_id(cpu->sysdev.id));
-}
-static SYSDEV_ATTR(physical_id, 0444, show_physical_id, NULL);
-
-static int __init topology_init(void)
-{
- int cpu;
- struct node *parent = NULL;
-
- register_nodes();
-
- register_cpu_notifier(&sysfs_cpu_nb);
-
- for_each_cpu(cpu) {
- struct cpu *c = &per_cpu(cpu_devices, cpu);
-
-#ifdef CONFIG_NUMA
- /* The node to which a cpu belongs can't be known
- * until the cpu is made present.
- */
- parent = NULL;
- if (cpu_present(cpu))
- parent = &node_devices[cpu_to_node(cpu)];
-#endif
- /*
- * For now, we just see if the system supports making
- * the RTAS calls for CPU hotplug. But, there may be a
- * more comprehensive way to do this for an individual
- * CPU. For instance, the boot cpu might never be valid
- * for hotplugging.
- */
- if (!ppc_md.cpu_die)
- c->no_control = 1;
-
- if (cpu_online(cpu) || (c->no_control == 0)) {
- register_cpu(c, cpu, parent);
-
- sysdev_create_file(&c->sysdev, &attr_physical_id);
- }
-
- if (cpu_online(cpu))
- register_cpu_online(cpu);
- }
-
- return 0;
-}
-__initcall(topology_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff