arch/x86/mach-generic/bigsmp.c

   1 /*
   2  * APIC driver for "bigsmp" XAPIC machines with more than 8 virtual CPUs.
   3  * Drives the local APIC in "clustered mode".
   4  */
   5 #define APIC_DEFINITION 1
   6 #include <linux/threads.h>
   7 #include <linux/cpumask.h>
   8 #include <asm/smp.h>
   9 #include <asm/mpspec.h>
  10 #include <asm/genapic.h>
  11 #include <asm/fixmap.h>
  12 #include <asm/apicdef.h>
  13 #include <linux/kernel.h>
  14 #include <linux/smp.h>
  15 #include <linux/init.h>
  16 #include <linux/dmi.h>
  17 #include <asm/mach-bigsmp/mach_apic.h>
  18 #include <asm/mach-bigsmp/mach_apicdef.h>
  19 #include <asm/mach-bigsmp/mach_ipi.h>
  20 #include <asm/mach-default/mach_mpparse.h>
  21
  22 static int dmi_bigsmp; /* can be set by dmi scanners */
  23
  24 static int hp_ht_bigsmp(const struct dmi_system_id *d)
  25 {
  26 #ifdef CONFIG_X86_GENERICARCH
  27         printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
  28         dmi_bigsmp = 1;
  29 #endif
  30         return 0;
  31 }
  32
  33
  34 static const struct dmi_system_id bigsmp_dmi_table[] = {
  35         { hp_ht_bigsmp, "HP ProLiant DL760 G2", {
  36                 DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
  37                 DMI_MATCH(DMI_BIOS_VERSION, "P44-"),
  38         }},
  39
  40         { hp_ht_bigsmp, "HP ProLiant DL740", {
  41                 DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
  42                 DMI_MATCH(DMI_BIOS_VERSION, "P47-"),
  43          }},
  44          { }
  45 };
  46
  47
  48 static int probe_bigsmp(void)
  49 {
  50         if (def_to_bigsmp)
  51                 dmi_bigsmp = 1;
  52         else
  53                 dmi_check_system(bigsmp_dmi_table);
  54         return dmi_bigsmp;
  55 }
  56
  57 struct genapic apic_bigsmp = APIC_INIT("bigsmp", probe_bigsmp);