arch/x86/xen/suspend.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/types.h>
   3 #include <linux/tick.h>
   4
   5 #include <xen/xen.h>
   6 #include <xen/interface/xen.h>
   7 #include <xen/grant_table.h>
   8 #include <xen/events.h>
   9
  10 #include <asm/xen/hypercall.h>
  11 #include <asm/xen/page.h>
  12 #include <asm/fixmap.h>
  13
  14 #include "xen-ops.h"
  15 #include "mmu.h"
  16 #include "pmu.h"
  17
  18 void xen_arch_pre_suspend(void)
  19 {
  20         if (xen_pv_domain())
  21                 xen_pv_pre_suspend();
  22 }
  23
  24 void xen_arch_post_suspend(int cancelled)
  25 {
  26         if (xen_pv_domain())
  27                 xen_pv_post_suspend(cancelled);
  28         else
  29                 xen_hvm_post_suspend(cancelled);
  30 }
  31
  32 static void xen_vcpu_notify_restore(void *data)
  33 {
  34         /* Boot processor notified via generic timekeeping_resume() */
  35         if (smp_processor_id() == 0)
  36                 return;
  37
  38         tick_resume_local();
  39 }
  40
  41 static void xen_vcpu_notify_suspend(void *data)
  42 {
  43         tick_suspend_local();
  44 }
  45
  46 void xen_arch_resume(void)
  47 {
  48         int cpu;
  49
  50         on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
  51
  52         for_each_online_cpu(cpu)
  53                 xen_pmu_init(cpu);
  54 }
  55
  56 void xen_arch_suspend(void)
  57 {
  58         int cpu;
  59
  60         for_each_online_cpu(cpu)
  61                 xen_pmu_finish(cpu);
  62
  63         on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
  64 }