summaryrefslogtreecommitdiffstats
path: root/arch/x86/xen/suspend_pv.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/xen/suspend_pv.c')
-rw-r--r--arch/x86/xen/suspend_pv.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/x86/xen/suspend_pv.c b/arch/x86/xen/suspend_pv.c
new file mode 100644
index 0000000000..cae9660f4c
--- /dev/null
+++ b/arch/x86/xen/suspend_pv.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/types.h>
+
+#include <asm/xen/hypercall.h>
+#include <asm/xen/page.h>
+
+#include <asm/fixmap.h>
+
+#include "xen-ops.h"
+
+void xen_pv_pre_suspend(void)
+{
+ xen_mm_pin_all();
+
+ 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_pv_post_suspend(int suspend_cancelled)
+{
+ xen_build_mfn_list_list();
+ set_fixmap(FIX_PARAVIRT_BOOTMAP, xen_start_info->shared_info);
+ HYPERVISOR_shared_info = (void *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
+ xen_setup_mfn_list_list();
+
+ 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();
+ }
+
+ xen_mm_unpin_all();
+}