/*
* x86 SMP booting functions
*
- * (c) 1995 Alan Cox, Building #3 <alan@redhat.com>
+ * (c) 1995 Alan Cox, Building #3 <alan@lxorguk.ukuu.org.uk>
* (c) 1998, 1999, 2000 Ingo Molnar <mingo@redhat.com>
* Copyright 2001 Andi Kleen, SuSE Labs.
*
/* Last level cache ID of each logical CPU */
DEFINE_PER_CPU(u16, cpu_llc_id) = BAD_APICID;
-/* bitmap of online cpus */
-cpumask_t cpu_online_map __read_mostly;
-EXPORT_SYMBOL(cpu_online_map);
-
-cpumask_t cpu_callin_map;
-cpumask_t cpu_callout_map;
-cpumask_t cpu_possible_map;
-EXPORT_SYMBOL(cpu_possible_map);
-
/* representing HT siblings of each logical CPU */
DEFINE_PER_CPU(cpumask_t, cpu_sibling_map);
EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
static atomic_t init_deasserted;
-/* representing cpus for which sibling maps can be computed */
-static cpumask_t cpu_sibling_setup_map;
-
/* Set if we find a B stepping CPU */
static int __cpuinitdata smp_b_stepping;
static void map_cpu_to_node(int cpu, int node)
{
printk(KERN_INFO "Mapping cpu %d to node %d\n", cpu, node);
- cpu_set(cpu, node_to_cpumask_map[node]);
+ cpumask_set_cpu(cpu, &node_to_cpumask_map[node]);
cpu_to_node_map[cpu] = node;
}
printk(KERN_INFO "Unmapping cpu %d from all nodes\n", cpu);
for (node = 0; node < MAX_NUMNODES; node++)
- cpu_clear(cpu, node_to_cpumask_map[node]);
+ cpumask_clear_cpu(cpu, &node_to_cpumask_map[node]);
cpu_to_node_map[cpu] = 0;
}
#else /* !(CONFIG_NUMA && CONFIG_X86_32) */
*/
phys_id = read_apic_id();
cpuid = smp_processor_id();
- if (cpu_isset(cpuid, cpu_callin_map)) {
+ if (cpumask_test_cpu(cpuid, cpu_callin_mask)) {
panic("%s: phys CPU#%d, CPU#%d already present??\n", __func__,
phys_id, cpuid);
}
/*
* Has the boot CPU finished it's STARTUP sequence?
*/
- if (cpu_isset(cpuid, cpu_callout_map))
+ if (cpumask_test_cpu(cpuid, cpu_callout_mask))
break;
cpu_relax();
}
/*
* Allow the master to continue.
*/
- cpu_set(cpuid, cpu_callin_map);
+ cpumask_set_cpu(cpuid, cpu_callin_mask);
}
static int __cpuinitdata unsafe_smp;
ipi_call_lock();
lock_vector_lock();
__setup_vector_irq(smp_processor_id());
- cpu_set(smp_processor_id(), cpu_online_map);
+ set_cpu_online(smp_processor_id(), true);
unlock_vector_lock();
ipi_call_unlock();
per_cpu(cpu_state, smp_processor_id()) = CPU_ONLINE;
int i;
struct cpuinfo_x86 *c = &cpu_data(cpu);
- cpu_set(cpu, cpu_sibling_setup_map);
+ cpumask_set_cpu(cpu, cpu_sibling_setup_mask);
if (smp_num_siblings > 1) {
- for_each_cpu_mask_nr(i, cpu_sibling_setup_map) {
- if (c->phys_proc_id == cpu_data(i).phys_proc_id &&
- c->cpu_core_id == cpu_data(i).cpu_core_id) {
- cpu_set(i, per_cpu(cpu_sibling_map, cpu));
- cpu_set(cpu, per_cpu(cpu_sibling_map, i));
- cpu_set(i, per_cpu(cpu_core_map, cpu));
- cpu_set(cpu, per_cpu(cpu_core_map, i));
- cpu_set(i, c->llc_shared_map);
- cpu_set(cpu, cpu_data(i).llc_shared_map);
+ for_each_cpu(i, cpu_sibling_setup_mask) {
+ struct cpuinfo_x86 *o = &cpu_data(i);
+
+ if (c->phys_proc_id == o->phys_proc_id &&
+ c->cpu_core_id == o->cpu_core_id) {
+ cpumask_set_cpu(i, cpu_sibling_mask(cpu));
+ cpumask_set_cpu(cpu, cpu_sibling_mask(i));
+ cpumask_set_cpu(i, cpu_core_mask(cpu));
+ cpumask_set_cpu(cpu, cpu_core_mask(i));
+ cpumask_set_cpu(i, &c->llc_shared_map);
+ cpumask_set_cpu(cpu, &o->llc_shared_map);
}
}
} else {
- cpu_set(cpu, per_cpu(cpu_sibling_map, cpu));
+ cpumask_set_cpu(cpu, cpu_sibling_mask(cpu));
}
- cpu_set(cpu, c->llc_shared_map);
+ cpumask_set_cpu(cpu, &c->llc_shared_map);
if (current_cpu_data.x86_max_cores == 1) {
- per_cpu(cpu_core_map, cpu) = per_cpu(cpu_sibling_map, cpu);
+ cpumask_copy(cpu_core_mask(cpu), cpu_sibling_mask(cpu));
c->booted_cores = 1;
return;
}
- for_each_cpu_mask_nr(i, cpu_sibling_setup_map) {
+ for_each_cpu(i, cpu_sibling_setup_mask) {
if (per_cpu(cpu_llc_id, cpu) != BAD_APICID &&
per_cpu(cpu_llc_id, cpu) == per_cpu(cpu_llc_id, i)) {
- cpu_set(i, c->llc_shared_map);
- cpu_set(cpu, cpu_data(i).llc_shared_map);
+ cpumask_set_cpu(i, &c->llc_shared_map);
+ cpumask_set_cpu(cpu, &cpu_data(i).llc_shared_map);
}
if (c->phys_proc_id == cpu_data(i).phys_proc_id) {
- cpu_set(i, per_cpu(cpu_core_map, cpu));
- cpu_set(cpu, per_cpu(cpu_core_map, i));
+ cpumask_set_cpu(i, cpu_core_mask(cpu));
+ cpumask_set_cpu(cpu, cpu_core_mask(i));
/*
* Does this new cpu bringup a new core?
*/
- if (cpus_weight(per_cpu(cpu_sibling_map, cpu)) == 1) {
+ if (cpumask_weight(cpu_sibling_mask(cpu)) == 1) {
/*
* for each core in package, increment
* the booted_cores for this new cpu
*/
- if (first_cpu(per_cpu(cpu_sibling_map, i)) == i)
+ if (cpumask_first(cpu_sibling_mask(i)) == i)
c->booted_cores++;
/*
* increment the core count for all
}
/* maps the cpu to the sched domain representing multi-core */
-cpumask_t cpu_coregroup_map(int cpu)
+const struct cpumask *cpu_coregroup_mask(int cpu)
{
struct cpuinfo_x86 *c = &cpu_data(cpu);
/*
* And for power savings, we return cpu_core_map
*/
if (sched_mc_power_savings || sched_smt_power_savings)
- return per_cpu(cpu_core_map, cpu);
+ return cpu_core_mask(cpu);
else
- return c->llc_shared_map;
+ return &c->llc_shared_map;
+}
+
+cpumask_t cpu_coregroup_map(int cpu)
+{
+ return *cpu_coregroup_mask(cpu);
}
static void impress_friends(void)
*/
pr_debug("Before bogomips.\n");
for_each_possible_cpu(cpu)
- if (cpu_isset(cpu, cpu_callout_map))
+ if (cpumask_test_cpu(cpu, cpu_callout_mask))
bogosum += cpu_data(cpu).loops_per_jiffy;
printk(KERN_INFO
"Total of %d processors activated (%lu.%02lu BogoMIPS).\n",
* allow APs to start initializing.
*/
pr_debug("Before Callout %d.\n", cpu);
- cpu_set(cpu, cpu_callout_map);
+ cpumask_set_cpu(cpu, cpu_callout_mask);
pr_debug("After Callout %d.\n", cpu);
/*
* Wait 5s total for a response
*/
for (timeout = 0; timeout < 50000; timeout++) {
- if (cpu_isset(cpu, cpu_callin_map))
+ if (cpumask_test_cpu(cpu, cpu_callin_mask))
break; /* It has booted */
udelay(100);
}
- if (cpu_isset(cpu, cpu_callin_map)) {
+ if (cpumask_test_cpu(cpu, cpu_callin_mask)) {
/* number CPUs logically, starting from 1 (BSP is 0) */
pr_debug("OK.\n");
printk(KERN_INFO "CPU%d: ", cpu);
if (boot_error) {
/* Try to put things back the way they were before ... */
numa_remove_cpu(cpu); /* was set by numa_add_cpu */
- cpu_clear(cpu, cpu_callout_map); /* was set by do_boot_cpu() */
- cpu_clear(cpu, cpu_initialized); /* was set by cpu_init() */
- cpu_clear(cpu, cpu_present_map);
+
+ /* was set by do_boot_cpu() */
+ cpumask_clear_cpu(cpu, cpu_callout_mask);
+
+ /* was set by cpu_init() */
+ cpumask_clear_cpu(cpu, cpu_initialized_mask);
+
+ set_cpu_present(cpu, false);
per_cpu(x86_cpu_to_apicid, cpu) = BAD_APICID;
}
/*
* Already booted CPU?
*/
- if (cpu_isset(cpu, cpu_callin_map)) {
+ if (cpumask_test_cpu(cpu, cpu_callin_mask)) {
pr_debug("do_boot_cpu %d Already started\n", cpu);
return -ENOSYS;
}
*/
static __init void disable_smp(void)
{
- cpu_present_map = cpumask_of_cpu(0);
- cpu_possible_map = cpumask_of_cpu(0);
+ /* use the read/write pointers to the present and possible maps */
+ cpumask_copy(&cpu_present_map, cpumask_of(0));
+ cpumask_copy(&cpu_possible_map, cpumask_of(0));
smpboot_clear_io_apic_irqs();
if (smp_found_config)
else
physid_set_mask_of_physid(0, &phys_cpu_present_map);
map_cpu_to_logical_apicid();
- cpu_set(0, per_cpu(cpu_sibling_map, 0));
- cpu_set(0, per_cpu(cpu_core_map, 0));
+ cpumask_set_cpu(0, cpu_sibling_mask(0));
+ cpumask_set_cpu(0, cpu_core_mask(0));
}
/*
nr = 0;
for_each_present_cpu(cpu) {
if (nr >= 8)
- cpu_clear(cpu, cpu_present_map);
+ set_cpu_present(cpu, false);
nr++;
}
nr = 0;
for_each_possible_cpu(cpu) {
if (nr >= 8)
- cpu_clear(cpu, cpu_possible_map);
+ set_cpu_possible(cpu, false);
nr++;
}
for_each_possible_cpu(i) {
c = &cpu_data(i);
/* mark all to hotplug */
- c->cpu_index = NR_CPUS;
+ c->cpu_index = nr_cpu_ids;
}
}
preempt_disable();
smp_cpu_index_default();
current_cpu_data = boot_cpu_data;
- cpu_callin_map = cpumask_of_cpu(0);
+ cpumask_copy(cpu_callin_mask, cpumask_of(0));
mb();
/*
* Setup boot CPU information
init_gdt(me);
#endif
switch_to_new_gdt();
- /* already set me in cpu_online_map in boot_cpu_init() */
- cpu_set(me, cpu_callout_map);
+ /* already set me in cpu_online_mask in boot_cpu_init() */
+ cpumask_set_cpu(me, cpu_callout_mask);
per_cpu(cpu_state, me) = CPU_ONLINE;
}
check_nmi_watchdog();
}
+static int __initdata setup_possible_cpus = -1;
+static int __init _setup_possible_cpus(char *str)
+{
+ get_option(&str, &setup_possible_cpus);
+ return 0;
+}
+early_param("possible_cpus", _setup_possible_cpus);
+
+
/*
* cpu_possible_map should be static, it cannot change as cpu's
* are onlined, or offlined. The reason is per-cpu data-structures
*
* Three ways to find out the number of additional hotplug CPUs:
* - If the BIOS specified disabled CPUs in ACPI/mptables use that.
- * - The user can overwrite it with additional_cpus=NUM
+ * - The user can overwrite it with possible_cpus=NUM
* - Otherwise don't reserve additional CPUs.
* We do this because additional CPUs waste a lot of memory.
* -AK
if (!num_processors)
num_processors = 1;
- possible = num_processors + disabled_cpus;
- if (possible > NR_CPUS)
- possible = NR_CPUS;
+ if (setup_possible_cpus == -1)
+ possible = num_processors + disabled_cpus;
+ else
+ possible = setup_possible_cpus;
+
+ total_cpus = max_t(int, possible, num_processors + disabled_cpus);
+
+ if (possible > CONFIG_NR_CPUS) {
+ printk(KERN_WARNING
+ "%d Processors exceeds NR_CPUS limit of %d\n",
+ possible, CONFIG_NR_CPUS);
+ possible = CONFIG_NR_CPUS;
+ }
printk(KERN_INFO "SMP: Allowing %d CPUs, %d hotplug CPUs\n",
possible, max_t(int, possible - num_processors, 0));
for (i = 0; i < possible; i++)
- cpu_set(i, cpu_possible_map);
+ set_cpu_possible(i, true);
nr_cpu_ids = possible;
}
int sibling;
struct cpuinfo_x86 *c = &cpu_data(cpu);
- for_each_cpu_mask_nr(sibling, per_cpu(cpu_core_map, cpu)) {
- cpu_clear(cpu, per_cpu(cpu_core_map, sibling));
+ for_each_cpu(sibling, cpu_core_mask(cpu)) {
+ cpumask_clear_cpu(cpu, cpu_core_mask(sibling));
/*/
* last thread sibling in this cpu core going down
*/
- if (cpus_weight(per_cpu(cpu_sibling_map, cpu)) == 1)
+ if (cpumask_weight(cpu_sibling_mask(cpu)) == 1)
cpu_data(sibling).booted_cores--;
}
- for_each_cpu_mask_nr(sibling, per_cpu(cpu_sibling_map, cpu))
- cpu_clear(cpu, per_cpu(cpu_sibling_map, sibling));
- cpus_clear(per_cpu(cpu_sibling_map, cpu));
- cpus_clear(per_cpu(cpu_core_map, cpu));
+ for_each_cpu(sibling, cpu_sibling_mask(cpu))
+ cpumask_clear_cpu(cpu, cpu_sibling_mask(sibling));
+ cpumask_clear(cpu_sibling_mask(cpu));
+ cpumask_clear(cpu_core_mask(cpu));
c->phys_proc_id = 0;
c->cpu_core_id = 0;
- cpu_clear(cpu, cpu_sibling_setup_map);
+ cpumask_clear_cpu(cpu, cpu_sibling_setup_mask);
}
static void __ref remove_cpu_from_maps(int cpu)
{
- cpu_clear(cpu, cpu_online_map);
- cpu_clear(cpu, cpu_callout_map);
- cpu_clear(cpu, cpu_callin_map);
+ set_cpu_online(cpu, false);
+ cpumask_clear_cpu(cpu, cpu_callout_mask);
+ cpumask_clear_cpu(cpu, cpu_callin_mask);
/* was set by cpu_init() */
- cpu_clear(cpu, cpu_initialized);
+ cpumask_clear_cpu(cpu, cpu_initialized_mask);
numa_remove_cpu(cpu);
}
lock_vector_lock();
remove_cpu_from_maps(cpu);
unlock_vector_lock();
- fixup_irqs(cpu_online_map);
+ fixup_irqs();
}
int native_cpu_disable(void)
git.samba.org / sfrench / cifs-2.6.git / blobdiff