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/mpspec.h>
   9 #include <asm/genapic.h>
  10 #include <asm/fixmap.h>
  11 #include <asm/apicdef.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/dmi.h>
  15 #include <asm/bigsmp/apicdef.h>
  16 #include <linux/smp.h>
  17 #include <asm/bigsmp/apic.h>
  18 #include <asm/bigsmp/ipi.h>
  19 #include <asm/mach-default/mach_mpparse.h>
  20
  21 static int dmi_bigsmp; /* can be set by dmi scanners */
  22
  23 static int hp_ht_bigsmp(const struct dmi_system_id *d)
  24 {
  25         printk(KERN_NOTICE "%s detected: force use of apic=bigsmp\n", d->ident);
  26         dmi_bigsmp = 1;
  27         return 0;
  28 }
  29
  30
  31 static const struct dmi_system_id bigsmp_dmi_table[] = {
  32         { hp_ht_bigsmp, "HP ProLiant DL760 G2",
  33         { DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
  34         DMI_MATCH(DMI_BIOS_VERSION, "P44-"),}
  35         },
  36
  37         { hp_ht_bigsmp, "HP ProLiant DL740",
  38         { DMI_MATCH(DMI_BIOS_VENDOR, "HP"),
  39         DMI_MATCH(DMI_BIOS_VERSION, "P47-"),}
  40         },
  41          { }
  42 };
  43
  44 static cpumask_t vector_allocation_domain(int cpu)
  45 {
  46         return cpumask_of_cpu(cpu);
  47 }
  48
  49 static int probe_bigsmp(void)
  50 {
  51         if (def_to_bigsmp)
  52                 dmi_bigsmp = 1;
  53         else
  54                 dmi_check_system(bigsmp_dmi_table);
  55         return dmi_bigsmp;
  56 }
  57
  58 struct genapic apic_bigsmp = APIC_INIT("bigsmp", probe_bigsmp);