aboutsummaryrefslogblamecommitdiffstats
path: root/arch/x86/xen/suspend.c
blob: 45329c8c226e4c4070f16a791b300265a0bf472b (plain) (tree)
1
2
3
4
5
6
7
8
9
                        
                             






                              
                       



                    
                               












                                                                           
                                                     
 
                       
                

                                   
                                      




                                                     
      

 
                                                 
 

                                  

                                






                                                                     

                                                                       
      
                                   

         

 










                                                                      

                          

                                                        
 
#include <linux/types.h>
#include <linux/clockchips.h>

#include <xen/interface/xen.h>
#include <xen/grant_table.h>
#include <xen/events.h>

#include <asm/xen/hypercall.h>
#include <asm/xen/page.h>
#include <asm/fixmap.h>

#include "xen-ops.h"
#include "mmu.h"

void xen_arch_pre_suspend(void)
{
	xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
	xen_start_info->console.domU.mfn =
		mfn_to_pfn(xen_start_info->console.domU.mfn);

	BUG_ON(!irqs_disabled());

	HYPERVISOR_shared_info = &xen_dummy_shared_info;
	if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
					 __pte_ma(0), 0))
		BUG();
}

void xen_arch_hvm_post_suspend(int suspend_cancelled)
{
#ifdef CONFIG_XEN_PVHVM
	int cpu;
	xen_hvm_init_shared_info();
	xen_callback_vector();
	xen_unplug_emulated_devices();
	if (xen_feature(XENFEAT_hvm_safe_pvclock)) {
		for_each_online_cpu(cpu) {
			xen_setup_runstate_info(cpu);
		}
	}
#endif
}

void xen_arch_post_suspend(int suspend_cancelled)
{
	xen_build_mfn_list_list();

	xen_setup_shared_info();

	if (suspend_cancelled) {
		xen_start_info->store_mfn =
			pfn_to_mfn(xen_start_info->store_mfn);
		xen_start_info->console.domU.mfn =
			pfn_to_mfn(xen_start_info->console.domU.mfn);
	} else {
#ifdef CONFIG_SMP
		BUG_ON(xen_cpu_initialized_map == NULL);
		cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
#endif
		xen_vcpu_restore();
	}

}

static void xen_vcpu_notify_restore(void *data)
{
	unsigned long reason = (unsigned long)data;

	/* Boot processor notified via generic timekeeping_resume() */
	if ( smp_processor_id() == 0)
		return;

	clockevents_notify(reason, NULL);
}

void xen_arch_resume(void)
{
	on_each_cpu(xen_vcpu_notify_restore,
		    (void *)CLOCK_EVT_NOTIFY_RESUME, 1);
}