arch/x86/xen/suspend_pv.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/types.h>
   3
   4 #include <asm/fixmap.h>
   5
   6 #include <asm/xen/hypercall.h>
   7 #include <asm/xen/page.h>
   8
   9 #include "xen-ops.h"
  10
  11 void xen_pv_pre_suspend(void)
  12 {
  13         xen_mm_pin_all();
  14
  15         xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
  16         xen_start_info->console.domU.mfn =
  17                 mfn_to_pfn(xen_start_info->console.domU.mfn);
  18
  19         BUG_ON(!irqs_disabled());
  20
  21         HYPERVISOR_shared_info = &xen_dummy_shared_info;
  22         if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
  23                                          __pte_ma(0), 0))
  24                 BUG();
  25 }
  26
  27 void xen_pv_post_suspend(int suspend_cancelled)
  28 {
  29         xen_build_mfn_list_list();
  30         set_fixmap(FIX_PARAVIRT_BOOTMAP, xen_start_info->shared_info);
  31         HYPERVISOR_shared_info = (void *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
  32         xen_setup_mfn_list_list();
  33
  34         if (suspend_cancelled) {
  35                 xen_start_info->store_mfn =
  36                         pfn_to_mfn(xen_start_info->store_mfn);
  37                 xen_start_info->console.domU.mfn =
  38                         pfn_to_mfn(xen_start_info->console.domU.mfn);
  39         } else {
  40 #ifdef CONFIG_SMP
  41                 BUG_ON(xen_cpu_initialized_map == NULL);
  42                 cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
  43 #endif
  44                 xen_vcpu_restore();
  45         }
  46
  47         xen_mm_unpin_all();
  48 }