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_hvm_post_suspend(int suspend_cancelled)
  30 {
  31         int cpu;
  32         xen_hvm_init_shared_info();
  33         xen_callback_vector();
  34         xen_unplug_emulated_devices();
  35         if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
  36                 for_each_online_cpu(cpu) {
  37                         xen_setup_runstate_info(cpu);
  38                 }
  39         }
  40 }
  41
  42 void xen_post_suspend(int suspend_cancelled)
  43 {
  44         xen_build_mfn_list_list();
  45
  46         xen_setup_shared_info();
  47
  48         if (suspend_cancelled) {
  49                 xen_start_info->store_mfn =
  50                         pfn_to_mfn(xen_start_info->store_mfn);
  51                 xen_start_info->console.domU.mfn =
  52                         pfn_to_mfn(xen_start_info->console.domU.mfn);
  53         } else {
  54 #ifdef CONFIG_SMP
  55                 BUG_ON(xen_cpu_initialized_map == NULL);
  56                 cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
  57 #endif
  58                 xen_vcpu_restore();
  59         }
  60
  61 }
  62
  63 static void xen_vcpu_notify_restore(void *data)
  64 {
  65         unsigned long reason = (unsigned long)data;
  66
  67         /* Boot processor notified via generic timekeeping_resume() */
  68         if ( smp_processor_id() == 0)
  69                 return;
  70
  71         clockevents_notify(reason, NULL);
  72 }
  73
  74 void xen_arch_resume(void)
  75 {
  76         on_each_cpu(xen_vcpu_notify_restore,
  77                     (void *)CLOCK_EVT_NOTIFY_RESUME, 1);
  78 }