Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel...

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / smpboot.c

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index f6174d229024874d7adc7d443cf4ec20279d55ab..31869bf5fabd68a187fe36799a3cff7fa9b5f0a9 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -62,6 +62,7 @@
 #include <asm/mtrr.h>
 #include <asm/vmi.h>
 #include <asm/genapic.h>
+#include <asm/setup.h>
 #include <linux/mc146818rtc.h>
 
 #include <mach_apic.h>
@@ -101,14 +102,8 @@ EXPORT_SYMBOL(smp_num_siblings);
 /* 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);
@@ -534,7 +529,7 @@ 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" };
@@ -573,14 +568,13 @@ static inline void __inquire_remote_apic(int apicid)
        }
 }
 
-#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;
@@ -597,7 +591,7 @@ wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip)
         * 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);
@@ -612,11 +606,9 @@ wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip)
 
        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;
@@ -735,7 +727,6 @@ wakeup_secondary_cpu(int phys_apicid, unsigned long start_eip)
 
        return (send_status | accept_status);
 }
-#endif /* WAKE_SECONDARY_VIA_INIT */
 
 struct create_idle {
        struct work_struct work;
@@ -1084,8 +1075,10 @@ static int __init smp_sanity_check(unsigned max_cpus)
 #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);
        }
 
@@ -1261,6 +1254,15 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
        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
@@ -1273,7 +1275,7 @@ void __init native_smp_cpus_done(unsigned int max_cpus)
  *
  * 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
@@ -1286,9 +1288,17 @@ __init void prefill_possible_map(void)
        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;
+
+       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));
@@ -1353,7 +1363,7 @@ void cpu_disable_common(void)
        lock_vector_lock();
        remove_cpu_from_maps(cpu);
        unlock_vector_lock();
-       fixup_irqs(cpu_online_map);
+       fixup_irqs();
 }
 
 int native_cpu_disable(void)