arch/x86/kernel/cpu/centaur_64.c

   1 #include <linux/init.h>
   2 #include <linux/smp.h>
   3
   4 #include <asm/cpufeature.h>
   5 #include <asm/processor.h>
   6
   7 #include "cpu.h"
   8
   9 static void __cpuinit early_init_centaur(struct cpuinfo_x86 *c)
  10 {
  11         if (c->x86 == 0x6 && c->x86_model >= 0xf)
  12                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
  13
  14         set_cpu_cap(c, X86_FEATURE_SYSENTER32);
  15 }
  16
  17 static void __cpuinit init_centaur(struct cpuinfo_x86 *c)
  18 {
  19         early_init_centaur(c);
  20
  21         if (c->x86 == 0x6 && c->x86_model >= 0xf) {
  22                 c->x86_cache_alignment = c->x86_clflush_size * 2;
  23                 set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
  24                 set_cpu_cap(c, X86_FEATURE_REP_GOOD);
  25         }
  26         set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);
  27 }
  28
  29 static struct cpu_dev centaur_cpu_dev __cpuinitdata = {
  30         .c_vendor       = "Centaur",
  31         .c_ident        = { "CentaurHauls" },
  32         .c_early_init   = early_init_centaur,
  33         .c_init         = init_centaur,
  34         .c_x86_vendor   = X86_VENDOR_CENTAUR,
  35 };
  36
  37 cpu_dev_register(centaur_cpu_dev);
  38