*/
-#include <linux/config.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/thread_info.h>
#include <linux/module.h>
-
#include <linux/delay.h>
#include <linux/mc146818rtc.h>
+#include <linux/smp.h>
+
#include <asm/mtrr.h>
#include <asm/pgalloc.h>
#include <asm/desc.h>
#include <asm/irq.h>
#include <asm/hw_irq.h>
#include <asm/numa.h>
+#include <asm/genapic.h>
/* Number of siblings per CPU package */
int smp_num_siblings = 1;
-/* Package ID of each logical CPU */
-u8 phys_proc_id[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
-/* core ID of each logical CPU */
-u8 cpu_core_id[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
+EXPORT_SYMBOL(smp_num_siblings);
+
+/* Last level cache ID of each logical CPU */
+u8 cpu_llc_id[NR_CPUS] __cpuinitdata = {[0 ... NR_CPUS-1] = BAD_APICID};
+EXPORT_SYMBOL(cpu_llc_id);
/* Bitmask of currently online CPUs */
cpumask_t cpu_online_map __read_mostly;
*/
cpumask_t cpu_callin_map;
cpumask_t cpu_callout_map;
+EXPORT_SYMBOL(cpu_callout_map);
cpumask_t cpu_possible_map;
EXPORT_SYMBOL(cpu_possible_map);
/* Per CPU bogomips and other parameters */
struct cpuinfo_x86 cpu_data[NR_CPUS] __cacheline_aligned;
+EXPORT_SYMBOL(cpu_data);
/* Set when the idlers are all forked */
int smp_threads_ready;
/* representing HT siblings of each logical CPU */
cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly;
+EXPORT_SYMBOL(cpu_sibling_map);
/* representing HT and core siblings of each logical CPU */
cpumask_t cpu_core_map[NR_CPUS] __read_mostly;
static __init int notscsync_setup(char *s)
{
notscsync = 1;
- return 0;
+ return 1;
}
__setup("notscsync", notscsync_setup);
cpu_set(cpuid, cpu_callin_map);
}
+/* maps the cpu to the sched domain representing multi-core */
+cpumask_t cpu_coregroup_map(int cpu)
+{
+ struct cpuinfo_x86 *c = cpu_data + cpu;
+ /*
+ * For perf, we return last level cache shared map.
+ * And for power savings, we return cpu_core_map
+ */
+ if (sched_mc_power_savings || sched_smt_power_savings)
+ return cpu_core_map[cpu];
+ else
+ return c->llc_shared_map;
+}
+
/* representing cpus for which sibling maps can be computed */
static cpumask_t cpu_sibling_setup_map;
if (smp_num_siblings > 1) {
for_each_cpu_mask(i, cpu_sibling_setup_map) {
- if (phys_proc_id[cpu] == phys_proc_id[i] &&
- cpu_core_id[cpu] == cpu_core_id[i]) {
+ if (c[cpu].phys_proc_id == c[i].phys_proc_id &&
+ c[cpu].cpu_core_id == c[i].cpu_core_id) {
cpu_set(i, cpu_sibling_map[cpu]);
cpu_set(cpu, cpu_sibling_map[i]);
cpu_set(i, cpu_core_map[cpu]);
cpu_set(cpu, cpu_core_map[i]);
+ cpu_set(i, c[cpu].llc_shared_map);
+ cpu_set(cpu, c[i].llc_shared_map);
}
}
} else {
cpu_set(cpu, cpu_sibling_map[cpu]);
}
+ cpu_set(cpu, c[cpu].llc_shared_map);
+
if (current_cpu_data.x86_max_cores == 1) {
cpu_core_map[cpu] = cpu_sibling_map[cpu];
c[cpu].booted_cores = 1;
}
for_each_cpu_mask(i, cpu_sibling_setup_map) {
- if (phys_proc_id[cpu] == phys_proc_id[i]) {
+ if (cpu_llc_id[cpu] != BAD_APICID &&
+ cpu_llc_id[cpu] == cpu_llc_id[i]) {
+ cpu_set(i, c[cpu].llc_shared_map);
+ cpu_set(cpu, c[i].llc_shared_map);
+ }
+ if (c[cpu].phys_proc_id == c[i].phys_proc_id) {
cpu_set(i, cpu_core_map[cpu]);
cpu_set(cpu, cpu_core_map[i]);
/*
* smp_call_function().
*/
lock_ipi_call_lock();
+ spin_lock(&vector_lock);
+ /* Setup the per cpu irq handling data structures */
+ __setup_vector_irq(smp_processor_id());
/*
* Allow the master to continue.
*/
cpu_set(smp_processor_id(), cpu_online_map);
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
+ spin_unlock(&vector_lock);
unlock_ipi_call_lock();
cpu_idle();
}
struct create_idle {
+ struct work_struct work;
struct task_struct *idle;
struct completion done;
int cpu;
};
-void do_fork_idle(void *_c_idle)
+void do_fork_idle(struct work_struct *work)
{
- struct create_idle *c_idle = _c_idle;
+ struct create_idle *c_idle =
+ container_of(work, struct create_idle, work);
c_idle->idle = fork_idle(c_idle->cpu);
complete(&c_idle->done);
int timeout;
unsigned long start_rip;
struct create_idle c_idle = {
+ .work = __WORK_INITIALIZER(c_idle.work, do_fork_idle),
.cpu = cpu,
- .done = COMPLETION_INITIALIZER(c_idle.done),
+ .done = COMPLETION_INITIALIZER_ONSTACK(c_idle.done),
};
- DECLARE_WORK(work, do_fork_idle, &c_idle);
/* allocate memory for gdts of secondary cpus. Hotplug is considered */
if (!cpu_gdt_descr[cpu].address &&
cpu, node);
}
+ alternatives_smp_switch(1);
c_idle.idle = get_idle_for_cpu(cpu);
* thread.
*/
if (!keventd_up() || current_is_keventd())
- work.func(work.data);
+ c_idle.work.func(&c_idle.work);
else {
- schedule_work(&work);
+ schedule_work(&c_idle.work);
wait_for_completion(&c_idle.done);
}
/*
* Switch from PIC to APIC mode.
*/
- connect_bsp_APIC();
setup_local_APIC();
if (GET_APIC_ID(apic_read(APIC_ID)) != boot_cpu_id) {
while (!cpu_isset(cpu, cpu_online_map))
cpu_relax();
+
+ if (num_online_cpus() > 8 && genapic == &apic_flat) {
+ printk(KERN_WARNING
+ "flat APIC routing can't be used with > 8 cpus\n");
+ BUG();
+ }
+
err = 0;
return err;
void __init smp_cpus_done(unsigned int max_cpus)
{
smp_cleanup_boot();
-
-#ifdef CONFIG_X86_IO_APIC
setup_ioapic_dest();
-#endif
-
check_nmi_watchdog();
+ time_init_gtod();
}
#ifdef CONFIG_HOTPLUG_CPU
cpu_clear(cpu, cpu_sibling_map[sibling]);
cpus_clear(cpu_sibling_map[cpu]);
cpus_clear(cpu_core_map[cpu]);
- phys_proc_id[cpu] = BAD_APICID;
- cpu_core_id[cpu] = BAD_APICID;
+ c[cpu].phys_proc_id = 0;
+ c[cpu].cpu_core_id = 0;
cpu_clear(cpu, cpu_sibling_setup_map);
}
if (cpu == 0)
return -EBUSY;
+ if (nmi_watchdog == NMI_LOCAL_APIC)
+ stop_apic_nmi_watchdog(NULL);
clear_local_APIC();
/*
local_irq_disable();
remove_siblinginfo(cpu);
+ spin_lock(&vector_lock);
/* It's now safe to remove this processor from the online map */
cpu_clear(cpu, cpu_online_map);
+ spin_unlock(&vector_lock);
remove_cpu_from_maps();
fixup_irqs(cpu_online_map);
return 0;
/* They ack this in play_dead by setting CPU_DEAD */
if (per_cpu(cpu_state, cpu) == CPU_DEAD) {
printk ("CPU %d is now offline\n", cpu);
+ if (1 == num_online_cpus())
+ alternatives_smp_switch(0);
return;
}
msleep(100);
printk(KERN_ERR "CPU %u didn't die...\n", cpu);
}
-__init int setup_additional_cpus(char *s)
+static __init int setup_additional_cpus(char *s)
{
- return get_option(&s, &additional_cpus);
+ return s && get_option(&s, &additional_cpus) ? 0 : -EINVAL;
}
-__setup("additional_cpus=", setup_additional_cpus);
+early_param("additional_cpus", setup_additional_cpus);
#else /* ... !CONFIG_HOTPLUG_CPU */
git://git.onelab.eu / linux-2.6.git / blobdiff