1 #include <linux/types.h>
2 #include <linux/clockchips.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 
xen_arch_pre_suspend(void)15 void xen_arch_pre_suspend(void)
16 {
17 	xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
18 	xen_start_info->console.domU.mfn =
19 		mfn_to_pfn(xen_start_info->console.domU.mfn);
20 
21 	BUG_ON(!irqs_disabled());
22 
23 	HYPERVISOR_shared_info = &xen_dummy_shared_info;
24 	if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
25 					 __pte_ma(0), 0))
26 		BUG();
27 }
28 
xen_arch_hvm_post_suspend(int suspend_cancelled)29 void xen_arch_hvm_post_suspend(int suspend_cancelled)
30 {
31 #ifdef CONFIG_XEN_PVHVM
32 	int cpu;
33 	xen_hvm_init_shared_info();
34 	xen_callback_vector();
35 	xen_unplug_emulated_devices();
36 	if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
37 		for_each_online_cpu(cpu) {
38 			xen_setup_runstate_info(cpu);
39 		}
40 	}
41 #endif
42 }
43 
xen_arch_post_suspend(int suspend_cancelled)44 void xen_arch_post_suspend(int suspend_cancelled)
45 {
46 	xen_build_mfn_list_list();
47 
48 	xen_setup_shared_info();
49 
50 	if (suspend_cancelled) {
51 		xen_start_info->store_mfn =
52 			pfn_to_mfn(xen_start_info->store_mfn);
53 		xen_start_info->console.domU.mfn =
54 			pfn_to_mfn(xen_start_info->console.domU.mfn);
55 	} else {
56 #ifdef CONFIG_SMP
57 		BUG_ON(xen_cpu_initialized_map == NULL);
58 		cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
59 #endif
60 		xen_vcpu_restore();
61 	}
62 
63 }
64 
xen_vcpu_notify_restore(void * data)65 static void xen_vcpu_notify_restore(void *data)
66 {
67 	unsigned long reason = (unsigned long)data;
68 
69 	/* Boot processor notified via generic timekeeping_resume() */
70 	if ( smp_processor_id() == 0)
71 		return;
72 
73 	clockevents_notify(reason, NULL);
74 }
75 
xen_arch_resume(void)76 void xen_arch_resume(void)
77 {
78 	on_each_cpu(xen_vcpu_notify_restore,
79 		    (void *)CLOCK_EVT_NOTIFY_RESUME, 1);
80 }
81