Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...

[powerpc.git] / arch / x86_64 / kernel / smpboot.c

diff --git a/arch/x86_64/kernel/smpboot.c b/arch/x86_64/kernel/smpboot.c
index 4fb34b5..c4e59bb 100644 (file)
--- a/arch/x86_64/kernel/smpboot.c
+++ b/arch/x86_64/kernel/smpboot.c
@@ -44,7 +44,6 @@
 #include <linux/mm.h>
 #include <linux/kernel_stat.h>
 #include <linux/smp_lock.h>
-#include <linux/irq.h>
 #include <linux/bootmem.h>
 #include <linux/thread_info.h>
 #include <linux/module.h>
@@ -58,14 +57,14 @@
 #include <asm/tlbflush.h>
 #include <asm/proto.h>
 #include <asm/nmi.h>
+#include <asm/irq.h>
+#include <asm/hw_irq.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 };
 u8 cpu_core_id[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID };
-EXPORT_SYMBOL(phys_proc_id);
-EXPORT_SYMBOL(cpu_core_id);
 
 /* Bitmask of currently online CPUs */
 cpumask_t cpu_online_map __read_mostly;
@@ -413,8 +412,13 @@ void __cpuinit smp_callin(void)
 
        /*
         * Get our bogomips.
+        *
+        * Need to enable IRQs because it can take longer and then
+        * the NMI watchdog might kill us.
         */
+       local_irq_enable();
        calibrate_delay();
+       local_irq_disable();
        Dprintk("Stack at about %p\n",&cpuid);
 
        disable_APIC_timer();
@@ -468,6 +472,7 @@ void __cpuinit start_secondary(void)
         * things done here to the most necessary things.
         */
        cpu_init();
+       preempt_disable();
        smp_callin();
 
        /* otherwise gcc will move up the smp_processor_id before the cpu_init */
@@ -540,8 +545,8 @@ static void inquire_remote_apic(int apicid)
                 */
                apic_wait_icr_idle();
 
-               apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
-               apic_write_around(APIC_ICR, APIC_DM_REMRD | regs[i]);
+               apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(apicid));
+               apic_write(APIC_ICR, APIC_DM_REMRD | regs[i]);
 
                timeout = 0;
                do {
@@ -574,12 +579,12 @@ static int __cpuinit wakeup_secondary_via_INIT(int phys_apicid, unsigned int sta
        /*
         * Turn INIT on target chip
         */
-       apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid));
+       apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid));
 
        /*
         * Send IPI
         */
-       apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_INT_ASSERT
+       apic_write(APIC_ICR, APIC_INT_LEVELTRIG | APIC_INT_ASSERT
                                | APIC_DM_INIT);
 
        Dprintk("Waiting for send to finish...\n");
@@ -595,10 +600,10 @@ static int __cpuinit wakeup_secondary_via_INIT(int phys_apicid, unsigned int sta
        Dprintk("Deasserting INIT.\n");
 
        /* Target chip */
-       apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid));
+       apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid));
 
        /* Send IPI */
-       apic_write_around(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT);
+       apic_write(APIC_ICR, APIC_INT_LEVELTRIG | APIC_DM_INIT);
 
        Dprintk("Waiting for send to finish...\n");
        timeout = 0;
@@ -610,16 +615,7 @@ static int __cpuinit wakeup_secondary_via_INIT(int phys_apicid, unsigned int sta
 
        atomic_set(&init_deasserted, 1);
 
-       /*
-        * Should we send STARTUP IPIs ?
-        *
-        * Determine this based on the APIC version.
-        * If we don't have an integrated APIC, don't send the STARTUP IPIs.
-        */
-       if (APIC_INTEGRATED(apic_version[phys_apicid]))
-               num_starts = 2;
-       else
-               num_starts = 0;
+       num_starts = 2;
 
        /*
         * Run STARTUP IPI loop.
@@ -640,12 +636,11 @@ static int __cpuinit wakeup_secondary_via_INIT(int phys_apicid, unsigned int sta
                 */
 
                /* Target chip */
-               apic_write_around(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid));
+               apic_write(APIC_ICR2, SET_APIC_DEST_FIELD(phys_apicid));
 
                /* Boot on the stack */
                /* Kick the second */
-               apic_write_around(APIC_ICR, APIC_DM_STARTUP
-                                       | (start_rip >> 12));
+               apic_write(APIC_ICR, APIC_DM_STARTUP | (start_rip >> 12));
 
                /*
                 * Give the other CPU some time to accept the IPI.
@@ -864,17 +859,6 @@ static __cpuinit void smp_cleanup_boot(void)
         * Reset trampoline flag
         */
        *((volatile int *) phys_to_virt(0x467)) = 0;
-
-#ifndef CONFIG_HOTPLUG_CPU
-       /*
-        * Free pages reserved for SMP bootup.
-        * When you add hotplug CPU support later remove this
-        * Note there is more work to be done for later CPU bootup.
-        */
-
-       free_page((unsigned long) __va(PAGE_SIZE));
-       free_page((unsigned long) __va(SMP_TRAMPOLINE_BASE));
-#endif
 }
 
 /*
@@ -907,7 +891,7 @@ static __init void disable_smp(void)
  * those NR_CPUS, hence cpu_possible_map represents entire NR_CPUS range.
  * - Ashok Raj
  */
-static void prefill_possible_map(void)
+__init void prefill_possible_map(void)
 {
        int i;
        for (i = 0; i < NR_CPUS; i++)
@@ -982,10 +966,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
        current_cpu_data = boot_cpu_data;
        current_thread_info()->cpu = 0;  /* needed? */
 
-#ifdef CONFIG_HOTPLUG_CPU
-       prefill_possible_map();
-#endif
-
        if (smp_sanity_check(max_cpus) < 0) {
                printk(KERN_INFO "SMP disabled\n");
                disable_smp();