arch/x86/kernel/apic/apic_common.c

   1 /*
   2  * Common functions shared between the various APIC flavours
   3  *
   4  * SPDX-License-Identifier: GPL-2.0
   5  */
   6 #include <linux/irq.h>
   7 #include <asm/apic.h>
   8
   9 u32 apic_default_calc_apicid(unsigned int cpu)
  10 {
  11         return per_cpu(x86_cpu_to_apicid, cpu);
  12 }
  13
  14 u32 apic_flat_calc_apicid(unsigned int cpu)
  15 {
  16         return 1U << cpu;
  17 }
  18
  19 bool default_check_apicid_used(physid_mask_t *map, int apicid)
  20 {
  21         return physid_isset(apicid, *map);
  22 }
  23
  24 void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
  25 {
  26         *retmap = *phys_map;
  27 }
  28
  29 int default_cpu_present_to_apicid(int mps_cpu)
  30 {
  31         if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
  32                 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
  33         else
  34                 return BAD_APICID;
  35 }
  36 EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
  37
  38 int default_check_phys_apicid_present(int phys_apicid)
  39 {
  40         return physid_isset(phys_apicid, phys_cpu_present_map);
  41 }
  42
  43 int default_apic_id_valid(u32 apicid)
  44 {
  45         return (apicid < 255);
  46 }