linux/arch/x86/mach-generic/summit.c
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   1/*
   2 * APIC driver for the IBM "Summit" chipset.
   3 */
   4#define APIC_DEFINITION 1
   5#include <linux/threads.h>
   6#include <linux/cpumask.h>
   7#include <asm/mpspec.h>
   8#include <asm/genapic.h>
   9#include <asm/fixmap.h>
  10#include <asm/apicdef.h>
  11#include <linux/kernel.h>
  12#include <linux/string.h>
  13#include <linux/init.h>
  14#include <asm/summit/apicdef.h>
  15#include <linux/smp.h>
  16#include <asm/summit/apic.h>
  17#include <asm/summit/ipi.h>
  18#include <asm/summit/mpparse.h>
  19
  20static int probe_summit(void)
  21{
  22        /* probed later in mptable/ACPI hooks */
  23        return 0;
  24}
  25
  26static cpumask_t vector_allocation_domain(int cpu)
  27{
  28        /* Careful. Some cpus do not strictly honor the set of cpus
  29         * specified in the interrupt destination when using lowest
  30         * priority interrupt delivery mode.
  31         *
  32         * In particular there was a hyperthreading cpu observed to
  33         * deliver interrupts to the wrong hyperthread when only one
  34         * hyperthread was specified in the interrupt desitination.
  35         */
  36        cpumask_t domain = { { [0] = APIC_ALL_CPUS, } };
  37        return domain;
  38}
  39
  40struct genapic apic_summit = APIC_INIT("summit", probe_summit);
  41