arch/x86/xen/suspend.c

   1 #include <linux/types.h>
   2 #include <linux/clockchips.h>
   3
   4 #include <xen/interface/xen.h>
   5 #include <xen/grant_table.h>
   6 #include <xen/events.h>
   7
   8 #include <asm/xen/hypercall.h>
   9 #include <asm/xen/page.h>
  10 #include <asm/fixmap.h>
  11
  12 #include "xen-ops.h"
  13 #include "mmu.h"
  14
  15 void xen_pre_suspend(void)
  16 {
  17         xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
  18         xen_start_info->console.domU.mfn =
  19                 mfn_to_pfn(xen_start_info->console.domU.mfn);
  20
  21         BUG_ON(!irqs_disabled());
  22
  23         HYPERVISOR_shared_info = &xen_dummy_shared_info;
  24         if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
  25                                          __pte_ma(0), 0))
  26                 BUG();
  27 }
  28
  29 void xen_post_suspend(int suspend_cancelled)
  30 {
  31         xen_build_mfn_list_list();
  32
  33         xen_setup_shared_info();
  34
  35         if (suspend_cancelled) {
  36                 xen_start_info->store_mfn =
  37                         pfn_to_mfn(xen_start_info->store_mfn);
  38                 xen_start_info->console.domU.mfn =
  39                         pfn_to_mfn(xen_start_info->console.domU.mfn);
  40         } else {
  41 #ifdef CONFIG_SMP
  42                 BUG_ON(xen_cpu_initialized_map == NULL);
  43                 cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
  44 #endif
  45                 xen_vcpu_restore();
  46         }
  47
  48 }
  49
  50 static void xen_vcpu_notify_restore(void *data)
  51 {
  52         unsigned long reason = (unsigned long)data;
  53
  54         /* Boot processor notified via generic timekeeping_resume() */
  55         if ( smp_processor_id() == 0)
  56                 return;
  57
  58         clockevents_notify(reason, NULL);
  59 }
  60
  61 void xen_arch_resume(void)
  62 {
  63         on_each_cpu(xen_vcpu_notify_restore,
  64                     (void *)CLOCK_EVT_NOTIFY_RESUME, 1);
  65 }