Quellcode-Bibliothek suspend_pv.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>

#include <asm/xen/hypercall.h>
#include <asm/xen/page.h>

#include <asm/fixmap.h>

#include "xen-ops.h"

void xen_pv_pre_suspend(void)
{
 xen_mm_pin_all();

 xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
 xen_start_info->console.domU.mfn =
  mfn_to_pfn(xen_start_info->console.domU.mfn);

 BUG_ON(!irqs_disabled());

 HYPERVISOR_shared_info = &xen_dummy_shared_info;
 if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
      __pte_ma(0), 0))
  BUG();
}

void xen_pv_post_suspend(int suspend_cancelled)
{
 xen_build_mfn_list_list();
 set_fixmap(FIX_PARAVIRT_BOOTMAP, xen_start_info->shared_info);
 HYPERVISOR_shared_info = (void *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
 xen_setup_mfn_list_list();

 if (suspend_cancelled) {
  xen_start_info->store_mfn =
   pfn_to_mfn(xen_start_info->store_mfn);
  xen_start_info->console.domU.mfn =
   pfn_to_mfn(xen_start_info->console.domU.mfn);
 } else {
#ifdef CONFIG_SMP
  BUG_ON(xen_cpu_initialized_map == NULL);
  cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
#endif
  xen_vcpu_restore();
 }

 xen_mm_unpin_all();
}