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Linux/arch/x86/xen/suspend_pv.c

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  1 // SPDX-License-Identifier: GPL-2.0
  2 #include <linux/types.h>
  3 
  4 #include <asm/xen/hypercall.h>
  5 #include <asm/xen/page.h>
  6 
  7 #include <asm/fixmap.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 }
 49 

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