x86/xen/suspend_pv.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include <linux/types.h>
0003
0004 #include <asm/xen/hypercall.h>
0005 #include <asm/xen/page.h>
0006
0007 #include <asm/fixmap.h>
0008
0009 #include "xen-ops.h"
0010
0011 void xen_pv_pre_suspend(void)
0012 {
0013     xen_mm_pin_all();
0014
0015     xen_start_info->store_mfn = mfn_to_pfn(xen_start_info->store_mfn);
0016     xen_start_info->console.domU.mfn =
0017         mfn_to_pfn(xen_start_info->console.domU.mfn);
0018
0019     BUG_ON(!irqs_disabled());
0020
0021     HYPERVISOR_shared_info = &xen_dummy_shared_info;
0022     if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
0023                      __pte_ma(0), 0))
0024         BUG();
0025 }
0026
0027 void xen_pv_post_suspend(int suspend_cancelled)
0028 {
0029     xen_build_mfn_list_list();
0030     set_fixmap(FIX_PARAVIRT_BOOTMAP, xen_start_info->shared_info);
0031     HYPERVISOR_shared_info = (void *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
0032     xen_setup_mfn_list_list();
0033
0034     if (suspend_cancelled) {
0035         xen_start_info->store_mfn =
0036             pfn_to_mfn(xen_start_info->store_mfn);
0037         xen_start_info->console.domU.mfn =
0038             pfn_to_mfn(xen_start_info->console.domU.mfn);
0039     } else {
0040 #ifdef CONFIG_SMP
0041         BUG_ON(xen_cpu_initialized_map == NULL);
0042         cpumask_copy(xen_cpu_initialized_map, cpu_online_mask);
0043 #endif
0044         xen_vcpu_restore();
0045     }
0046
0047     xen_mm_unpin_all();
0048 }