Merge tag 'fbdev-v4.19' of https://github.com/bzolnier/linux
[linux-2.6-block.git] / 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 }