arch/x86/kernel/apic/probe_64.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2004 James Cleverdon, IBM.
   4  *
   5  * Generic APIC sub-arch probe layer.
   6  *
   7  * Hacked for x86-64 by James Cleverdon from i386 architecture code by
   8  * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
   9  * James Cleverdon.
  10  */
  11 #include <linux/thread_info.h>
  12 #include <asm/apic.h>
  13
  14 #include "local.h"
  15
  16 /* Select the appropriate APIC driver */
  17 void __init x86_64_probe_apic(void)
  18 {
  19         struct apic **drv;
  20
  21         enable_IR_x2apic();
  22
  23         for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
  24                 if ((*drv)->probe && (*drv)->probe()) {
  25                         apic_install_driver(*drv);
  26                         break;
  27                 }
  28         }
  29 }
  30
  31 int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
  32 {
  33         struct apic **drv;
  34
  35         for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
  36                 if ((*drv)->acpi_madt_oem_check(oem_id, oem_table_id)) {
  37                         apic_install_driver(*drv);
  38                         return 1;
  39                 }
  40         }
  41         return 0;
  42 }