LXR linux/arch/x86/xen/suspend.c

   1#include <linux/types.h>
   2#include <linux/tick.h>
   3
   4#include <xen/xen.h>
   5#include <xen/interface/xen.h>
   6#include <xen/grant_table.h>
   7#include <xen/events.h>
   8
   9#include <asm/xen/hypercall.h>
  10#include <asm/xen/page.h>
  11#include <asm/fixmap.h>
  12
  13#include "xen-ops.h"
  14#include "mmu.h"
  15#include "pmu.h"
  16
  17static void xen_pv_pre_suspend(void)
  18{
  19        xen_mm_pin_all();
  20
  21        xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
  22        xen_start_info->console.domU.mfn =
  23                mfn_to_pfn(xen_start_info->console.domU.mfn);
  24
  25        BUG_ON(!irqs_disabled());
  26
  27        HYPERVISOR_shared_info = &xen_dummy_shared_info;
  28        if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
  29                                         __pte_ma(0), 0))
  30                BUG();
  31}
  32
  33static void xen_hvm_post_suspend(int suspend_cancelled)
  34{
  35#ifdef CONFIG_XEN_PVHVM
  36        int cpu;
  37        if (!suspend_cancelled)
  38            xen_hvm_init_shared_info();
  39        xen_callback_vector();
  40        xen_unplug_emulated_devices();
  41        if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
  42                for_each_online_cpu(cpu) {
  43                        xen_setup_runstate_info(cpu);
  44                }
  45        }
  46#endif
  47}
  48
  49static void xen_pv_post_suspend(int suspend_cancelled)
  50{
  51        xen_build_mfn_list_list();
  52
  53        xen_setup_shared_info();
  54
  55        if (suspend_cancelled) {
  56                xen_start_info->store_mfn =
  57                        pfn_to_mfn(xen_start_info->store_mfn);
  58                xen_start_info->console.domU.mfn =
  59                        pfn_to_mfn(xen_start_info->console.domU.mfn);
  60        } else {
  61#ifdef CONFIG_SMP
  62                BUG_ON(xen_cpu_initialized_map == NULL);
  63                cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
  64#endif
  65                xen_vcpu_restore();
  66        }
  67
  68        xen_mm_unpin_all();
  69}
  70
  71void xen_arch_pre_suspend(void)
  72{
  73        if (xen_pv_domain())
  74                xen_pv_pre_suspend();
  75}
  76
  77void xen_arch_post_suspend(int cancelled)
  78{
  79        if (xen_pv_domain())
  80                xen_pv_post_suspend(cancelled);
  81        else
  82                xen_hvm_post_suspend(cancelled);
  83}
  84
  85static void xen_vcpu_notify_restore(void *data)
  86{
  87        /* Boot processor notified via generic timekeeping_resume() */
  88        if (smp_processor_id() == 0)
  89                return;
  90
  91        tick_resume_local();
  92}
  93
  94static void xen_vcpu_notify_suspend(void *data)
  95{
  96        tick_suspend_local();
  97}
  98
  99void xen_arch_resume(void)
 100{
 101        int cpu;
 102
 103        on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
 104
 105        for_each_online_cpu(cpu)
 106                xen_pmu_init(cpu);
 107}
 108
 109void xen_arch_suspend(void)
 110{
 111        int cpu;
 112
 113        for_each_online_cpu(cpu)
 114                xen_pmu_finish(cpu);
 115
 116        on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
 117}
 118