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         xen_save_time_memory_area();
  21
  22         if (xen_pv_domain())
  23                 xen_pv_pre_suspend();
  24 }
  25
  26 void xen_arch_post_suspend(int cancelled)
  27 {
  28         if (xen_pv_domain())
  29                 xen_pv_post_suspend(cancelled);
  30         else
  31                 xen_hvm_post_suspend(cancelled);
  32
  33         xen_restore_time_memory_area();
  34 }
  35
  36 static void xen_vcpu_notify_restore(void *data)
  37 {
  38         /* Boot processor notified via generic timekeeping_resume() */
  39         if (smp_processor_id() == 0)
  40                 return;
  41
  42         tick_resume_local();
  43 }
  44
  45 static void xen_vcpu_notify_suspend(void *data)
  46 {
  47         tick_suspend_local();
  48 }
  49
  50 void xen_arch_resume(void)
  51 {
  52         int cpu;
  53
  54         on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
  55
  56         for_each_online_cpu(cpu)
  57                 xen_pmu_init(cpu);
  58 }
  59
  60 void xen_arch_suspend(void)
  61 {
  62         int cpu;
  63
  64         for_each_online_cpu(cpu)
  65                 xen_pmu_finish(cpu);
  66
  67         on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
  68 }