/*
* 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.
*
#include <asm/mtrr.h>
#include <asm/vmi.h>
#include <asm/genapic.h>
+#include <asm/setup.h>
#include <linux/mc146818rtc.h>
#include <mach_apic.h>
/* 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);
/*
* Activate a secondary processor.
*/
-static void __cpuinit start_secondary(void *unused)
+notrace static void __cpuinit start_secondary(void *unused)
{
/*
* Don't put *anything* before cpu_init(), SMP booting is too
* fragile that we want to limit the things done here to the
* most necessary things.
*/
-#ifdef CONFIG_VMI
vmi_bringup();
-#endif
cpu_init();
preempt_disable();
smp_callin();
}
/* 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 &per_cpu(cpu_core_map, 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 bogocount - setting activated=1.\n");
}
-static inline void __inquire_remote_apic(int apicid)
+void __inquire_remote_apic(int apicid)
{
unsigned i, regs[] = { APIC_ID >> 4, APIC_LVR >> 4, APIC_SPIV >> 4 };
char *names[] = { "ID", "VERSION", "SPIV" };
}
}
-#ifdef WAKE_SECONDARY_VIA_NMI
/*
* Poke the other CPU in the eye via NMI to wake it up. Remember that the normal
* INIT, INIT, STARTUP sequence will reset the chip hard for us, and this
* won't ... remember to clear down the APIC, etc later.
*/
-static int __devinit
-wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip)
+int __devinit
+wakeup_secondary_cpu_via_nmi(int logical_apicid, unsigned long start_eip)
{
unsigned long send_status, accept_status = 0;
int maxlvt;
* Give the other CPU some time to accept the IPI.
*/
udelay(200);
- if (APIC_INTEGRATED(apic_version[phys_apicid])) {
+ if (APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) {
maxlvt = lapic_get_maxlvt();
if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */
apic_write(APIC_ESR, 0);
return (send_status | accept_status);
}
-#endif /* WAKE_SECONDARY_VIA_NMI */
-#ifdef WAKE_SECONDARY_VIA_INIT
-static int __devinit
-wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip)
+int __devinit
+wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip)
{
unsigned long send_status, accept_status = 0;
int maxlvt, num_starts, j;
return (send_status | accept_status);
}
-#endif /* WAKE_SECONDARY_VIA_INIT */
struct create_idle {
struct work_struct work;
#endif
if (!physid_isset(hard_smp_processor_id(), phys_cpu_present_map)) {
- printk(KERN_WARNING "weird, boot CPU (#%d) not listed"
- "by the BIOS.\n", hard_smp_processor_id());
+ printk(KERN_WARNING
+ "weird, boot CPU (#%d) not listed by the BIOS.\n",
+ hard_smp_processor_id());
+
physid_set(hard_smp_processor_id(), phys_cpu_present_map);
}
for_each_possible_cpu(i) {
c = &cpu_data(i);
/* mark all to hotplug */
- c->cpu_index = NR_CPUS;
+ c->cpu_index = nr_cpu_ids;
}
}
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));
lock_vector_lock();
remove_cpu_from_maps(cpu);
unlock_vector_lock();
- fixup_irqs(cpu_online_map);
+ fixup_irqs();
}
int native_cpu_disable(void)
projects / cascardo / linux.git / blobdiff