x86: change x86_64 native_smp_prepare_cpus to match i386

An APIC test is moved, and code is replaced by the mach-default
already defined function (smpboot_setup_io_apic).
setup_portio_remap() is added, but it is a nop in mach-default.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 10 insertions, 14 deletions

diff --git a/arch/x86/kernel/smpboot_64.c b/arch/x86/kernel/smpboot_64.c
index f4363a38d079..6679ac502160 100644
--- a/arch/x86/kernel/smpboot_64.c
+++ b/arch/x86/kernel/smpboot_64.c
@@ -71,6 +71,7 @@ int smp_threads_ready;
 cycles_t cacheflush_time;
 unsigned long cache_decay_ticks;
 
+static int boot_cpu_logical_apicid;
 /*
  * Fall back to non SMP mode after errors.
  *
@@ -167,7 +168,11 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
 {
         nmi_watchdog_default();
         smp_cpu_index_default();
+        cpu_callin_map = cpumask_of_cpu(0);
+        mb();
+
         current_cpu_data = boot_cpu_data;
+        boot_cpu_logical_apicid = logical_smp_processor_id();
         current_thread_info()->cpu = 0;  /* needed? */
         set_cpu_sibling_map(0);
 
@@ -177,6 +182,11 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
                 return;
         }
 
+        if (GET_APIC_ID(apic_read(APIC_ID)) != boot_cpu_physical_apicid) {
+                panic("Boot APIC ID in local APIC unexpected (%d vs %d)",
+                     GET_APIC_ID(apic_read(APIC_ID)), boot_cpu_physical_apicid);
+                /* Or can we switch back to PIC here? */
+        }
 
         /*
          * Switch from PIC to APIC mode.
@@ -190,20 +200,6 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
                 enable_IO_APIC();
         end_local_APIC_setup();
 
-        if (GET_APIC_ID(apic_read(APIC_ID)) != boot_cpu_physical_apicid) {
-                panic("Boot APIC ID in local APIC unexpected (%d vs %d)",
-                     GET_APIC_ID(apic_read(APIC_ID)), boot_cpu_physical_apicid);
-                /* Or can we switch back to PIC here? */
-        }
-
-        /*
-         * Now start the IO-APICs
-         */
-        if (!skip_ioapic_setup && nr_ioapics)
-                setup_IO_APIC();
-        else
-                nr_ioapics = 0;
-
         /*
          * Set up local APIC timer on boot CPU.
          */