1#include <linux/types.h>
2#include <linux/tick.h>
3
4#include <xen/interface/xen.h>
5#include <xen/grant_table.h>
6#include <xen/events.h>
7
8#include <asm/xen/hypercall.h>
9#include <asm/xen/page.h>
10#include <asm/fixmap.h>
11
12#include "xen-ops.h"
13#include "mmu.h"
14
15static void xen_pv_pre_suspend(void)
16{
17	xen_mm_pin_all();
18
19	xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
20	xen_start_info->console.domU.mfn =
21		mfn_to_pfn(xen_start_info->console.domU.mfn);
22
23	BUG_ON(!irqs_disabled());
24
25	HYPERVISOR_shared_info = &xen_dummy_shared_info;
26	if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
27					 __pte_ma(0), 0))
28		BUG();
29}
30
31static void xen_hvm_post_suspend(int suspend_cancelled)
32{
33#ifdef CONFIG_XEN_PVHVM
34	int cpu;
35	if (!suspend_cancelled)
36	    xen_hvm_init_shared_info();
37	xen_callback_vector();
38	xen_unplug_emulated_devices();
39	if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
40		for_each_online_cpu(cpu) {
41			xen_setup_runstate_info(cpu);
42		}
43	}
44#endif
45}
46
47static void xen_pv_post_suspend(int suspend_cancelled)
48{
49	xen_build_mfn_list_list();
50
51	xen_setup_shared_info();
52
53	if (suspend_cancelled) {
54		xen_start_info->store_mfn =
55			pfn_to_mfn(xen_start_info->store_mfn);
56		xen_start_info->console.domU.mfn =
57			pfn_to_mfn(xen_start_info->console.domU.mfn);
58	} else {
59#ifdef CONFIG_SMP
60		BUG_ON(xen_cpu_initialized_map == NULL);
61		cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
62#endif
63		xen_vcpu_restore();
64	}
65
66	xen_mm_unpin_all();
67}
68
69void xen_arch_pre_suspend(void)
70{
71    if (xen_pv_domain())
72        xen_pv_pre_suspend();
73}
74
75void xen_arch_post_suspend(int cancelled)
76{
77    if (xen_pv_domain())
78        xen_pv_post_suspend(cancelled);
79    else
80        xen_hvm_post_suspend(cancelled);
81}
82
83static void xen_vcpu_notify_restore(void *data)
84{
85	/* Boot processor notified via generic timekeeping_resume() */
86	if (smp_processor_id() == 0)
87		return;
88
89	tick_resume_local();
90}
91
92static void xen_vcpu_notify_suspend(void *data)
93{
94	tick_suspend_local();
95}
96
97void xen_arch_resume(void)
98{
99	on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
100}
101
102void xen_arch_suspend(void)
103{
104	on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
105}
106