1#include <linux/types.h>
2#include <linux/tick.h>
3
4#include <xen/xen.h>
5#include <xen/interface/xen.h>
6#include <xen/grant_table.h>
7#include <xen/events.h>
8
9#include <asm/xen/hypercall.h>
10#include <asm/xen/page.h>
11#include <asm/fixmap.h>
12
13#include "xen-ops.h"
14#include "mmu.h"
15#include "pmu.h"
16
17static void xen_pv_pre_suspend(void)
18{
19	xen_mm_pin_all();
20
21	xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
22	xen_start_info->console.domU.mfn =
23		mfn_to_pfn(xen_start_info->console.domU.mfn);
24
25	BUG_ON(!irqs_disabled());
26
27	HYPERVISOR_shared_info = &xen_dummy_shared_info;
28	if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
29					 __pte_ma(0), 0))
30		BUG();
31}
32
33static void xen_hvm_post_suspend(int suspend_cancelled)
34{
35#ifdef CONFIG_XEN_PVHVM
36	int cpu;
37	if (!suspend_cancelled)
38	    xen_hvm_init_shared_info();
39	xen_callback_vector();
40	xen_unplug_emulated_devices();
41	if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
42		for_each_online_cpu(cpu) {
43			xen_setup_runstate_info(cpu);
44		}
45	}
46#endif
47}
48
49static void xen_pv_post_suspend(int suspend_cancelled)
50{
51	xen_build_mfn_list_list();
52
53	xen_setup_shared_info();
54
55	if (suspend_cancelled) {
56		xen_start_info->store_mfn =
57			pfn_to_mfn(xen_start_info->store_mfn);
58		xen_start_info->console.domU.mfn =
59			pfn_to_mfn(xen_start_info->console.domU.mfn);
60	} else {
61#ifdef CONFIG_SMP
62		BUG_ON(xen_cpu_initialized_map == NULL);
63		cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
64#endif
65		xen_vcpu_restore();
66	}
67
68	xen_mm_unpin_all();
69}
70
71void xen_arch_pre_suspend(void)
72{
73	if (xen_pv_domain())
74		xen_pv_pre_suspend();
75}
76
77void xen_arch_post_suspend(int cancelled)
78{
79	if (xen_pv_domain())
80		xen_pv_post_suspend(cancelled);
81	else
82		xen_hvm_post_suspend(cancelled);
83}
84
85static void xen_vcpu_notify_restore(void *data)
86{
87	/* Boot processor notified via generic timekeeping_resume() */
88	if (smp_processor_id() == 0)
89		return;
90
91	tick_resume_local();
92}
93
94static void xen_vcpu_notify_suspend(void *data)
95{
96	tick_suspend_local();
97}
98
99void xen_arch_resume(void)
100{
101	int cpu;
102
103	on_each_cpu(xen_vcpu_notify_restore, NULL, 1);
104
105	for_each_online_cpu(cpu)
106		xen_pmu_init(cpu);
107}
108
109void xen_arch_suspend(void)
110{
111	int cpu;
112
113	for_each_online_cpu(cpu)
114		xen_pmu_finish(cpu);
115
116	on_each_cpu(xen_vcpu_notify_suspend, NULL, 1);
117}
118