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 
xen_pv_pre_suspend(void)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 
xen_pv_post_suspend(int suspend_cancelled)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