xen: suspend: pass extra hypercall argument via suspend_info struct

Signed-off-by: Ian Campbell <[e-mail]>
Reviewed-by: Konrad Rzeszutek Wilk <[e-mail]>

drivers/xen/manage.c

···
 
 struct suspend_info {
 	int cancelled;
+	unsigned long arg; /* extra hypercall argument */
 };
 
 #ifdef CONFIG_PM_SLEEP
···
 	 * or the domain was merely checkpointed, and 0 if it
 	 * is resuming in a new domain.
 	 */
-	si->cancelled = HYPERVISOR_suspend(0UL);
+	si->cancelled = HYPERVISOR_suspend(si->arg);
 
 	xen_hvm_post_suspend(si->cancelled);
 	gnttab_resume();
···
 	 * or the domain was merely checkpointed, and 0 if it
 	 * is resuming in a new domain.
 	 */
-	si->cancelled = HYPERVISOR_suspend(virt_to_mfn(xen_start_info));
+	si->cancelled = HYPERVISOR_suspend(si->arg);
 
 	xen_post_suspend(si->cancelled);
 	gnttab_resume();
···
 	}
 
 	si.cancelled = 1;
+
+	if (xen_hvm_domain())
+		si.arg = 0UL;
+	else
+		si.arg = virt_to_mfn(xen_start_info);
 
 	if (xen_hvm_domain())
 		err = stop_machine(xen_hvm_suspend, &si, cpumask_of(0));