From 9d1fe3236a1d64ab687e16b4cbbaa1383352a2c1 Mon Sep 17 00:00:00 2001 From: Mike Travis Date: Tue, 8 Apr 2008 11:43:04 -0700 Subject: cpumask: add show cpu map functions * Add cpu_sysdev_class functions to display the following maps with cpulist_scnprintf(). cpu_online_map cpu_present_map cpu_possible_map * Small change to include/linux/sysdev.h to allow the attribute name and label to be different (to avoid collision with the "attr_online" entry for bringing cpus on- and off-line.) Cc: H. Peter Anvin Signed-off-by: Mike Travis Signed-off-by: Ingo Molnar --- drivers/base/cpu.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) (limited to 'drivers/base') diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 499b003f927..2c76afff3b1 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -102,6 +102,51 @@ static ssize_t show_crash_notes(struct sys_device *dev, char *buf) static SYSDEV_ATTR(crash_notes, 0400, show_crash_notes, NULL); #endif +/* + * Print cpu online, possible, present, and system maps + */ +static ssize_t print_cpus_map(char *buf, cpumask_t *map) +{ + int n = cpulist_scnprintf(buf, PAGE_SIZE-2, *map); + + buf[n++] = '\n'; + buf[n] = '\0'; + return n; +} + +#define print_cpus_func(type) \ +static ssize_t print_cpus_##type(struct sysdev_class *class, char *buf) \ +{ \ + return print_cpus_map(buf, &cpu_##type##_map); \ +} \ +struct sysdev_class_attribute attr_##type##_map = \ + _SYSDEV_CLASS_ATTR(type, 0444, print_cpus_##type, NULL) + +print_cpus_func(online); +print_cpus_func(possible); +print_cpus_func(present); + +struct sysdev_class_attribute *cpu_state_attr[] = { + &attr_online_map, + &attr_possible_map, + &attr_present_map, +}; + +static int cpu_states_init(void) +{ + int i; + int err = 0; + + for (i = 0; i < ARRAY_SIZE(cpu_state_attr); i++) { + int ret; + ret = sysdev_class_create_file(&cpu_sysdev_class, + cpu_state_attr[i]); + if (!err) + err = ret; + } + return err; +} + /* * register_cpu - Setup a sysfs device for a CPU. * @cpu - cpu->hotpluggable field set to 1 will generate a control file in @@ -147,6 +192,9 @@ int __init cpu_dev_init(void) int err; err = sysdev_class_register(&cpu_sysdev_class); + if (!err) + err = cpu_states_init(); + #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT) if (!err) err = sched_create_sysfs_power_savings_entries(&cpu_sysdev_class); -- cgit v1.2.3