1 // SPDX-License-Identifier: GPL-2.0-only
31 #include "papr-hvpipe.h"	/* hvpipe_migration_handler() */
51 #define PRRN_SCOPE -2
97 	is_platfac = of_node_is_type(dn, "ibm,platform-facilities") ||  in delete_dt_node()
98 		     of_node_is_type(pdn, "ibm,platform-facilities");  in delete_dt_node()
102 	 * The drivers that bind to nodes in the platform-facilities  in delete_dt_node()
126 	 * value is contained in the buffer and we need to call  in update_dt_property()
127 	 * ibm,update-properties again to get the rest of the value.  in update_dt_property()
138 		char *new_data = kzalloc(new_prop->length + vd, GFP_KERNEL);  in update_dt_property()
140 			return -ENOMEM;  in update_dt_property()
142 		memcpy(new_data, new_prop->value, new_prop->length);  in update_dt_property()
143 		memcpy(new_data + new_prop->length, value, vd);  in update_dt_property()
145 		kfree(new_prop->value);  in update_dt_property()
146 		new_prop->value = new_data;  in update_dt_property()
147 		new_prop->length += vd;  in update_dt_property()
151 			return -ENOMEM;  in update_dt_property()
153 		new_prop->name = kstrdup(name, GFP_KERNEL);  in update_dt_property()
154 		if (!new_prop->name) {  in update_dt_property()
156 			return -ENOMEM;  in update_dt_property()
159 		new_prop->length = vd;  in update_dt_property()
160 		new_prop->value = kzalloc(new_prop->length, GFP_KERNEL);  in update_dt_property()
161 		if (!new_prop->value) {  in update_dt_property()
162 			kfree(new_prop->name);  in update_dt_property()
164 			return -ENOMEM;  in update_dt_property()
167 		memcpy(new_prop->value, value, vd);  in update_dt_property()
193 		return -EINVAL;  in update_dt_node()
197 		return -ENOMEM;  in update_dt_node()
200 	upwa->phandle = cpu_to_be32(dn->phandle);  in update_dt_node()
209 		nprops = be32_to_cpu(upwa->nprops);  in update_dt_node()
211 		/* On the first call to ibm,update-properties for a node the  in update_dt_node()
220 			nprops--;  in update_dt_node()
271 		return -ENOENT;  in add_dt_node()
275 	 * necessary counterpart. We also know that a platform-facilities  in add_dt_node()
280 	if (of_node_is_type(dn, "ibm,platform-facilities")) {  in add_dt_node()
308 		return -ENOMEM;  in pseries_devicetree_update()
390 	/* Reinitialise system information for hv-24x7 */  in post_mobility_fixup()
409 		ret = -EINVAL;  in poll_vasi_state()
412 		ret = -EOPNOTSUPP;  in poll_vasi_state()
417 		ret = -EIO;  in poll_vasi_state()
429 	 * Wait for transition from H_VASI_ENABLED to  in wait_for_vasi_session_suspending()
441 			ret = -EIO;  in wait_for_vasi_session_suspending()
448 	 * ibm,suspend-me are also unimplemented, we'll recover then.  in wait_for_vasi_session_suspending()
450 	if (ret == -EOPNOTSUPP)  in wait_for_vasi_session_suspending()
464 	 * Wait for transition from H_VASI_RESUMED to H_VASI_COMPLETED.  in wait_for_vasi_session_completed()
472 		 * which is translate in EINVAL by poll_vasi_state().  in wait_for_vasi_session_completed()
474 		if (ret == -EINVAL || (!ret && state == H_VASI_COMPLETED)) {  in wait_for_vasi_session_completed()
535 	pr_info("calling ibm,suspend-me on CPU %i\n", smp_processor_id());  in do_suspend()
540 	 * before suspending in order to minimize the possibility of  in do_suspend()
541 	 * programming non-existent entries on the destination. If  in do_suspend()
542 	 * suspend fails, we restore it before returning. On success  in do_suspend()
550 		pr_err("ibm,suspend-me error: %d\n", status);  in do_suspend()
558  * struct pseries_suspend_info - State shared between CPUs for join/suspend.
559  * @counter: Threads are to increment this upon resuming from suspend
563  * @done: False if join/suspend is in progress. True if the operation is
574 	atomic_t *counter = &info->counter;  in do_join()
586 		 * All other CPUs are offline or in H_JOIN. This CPU  in do_join()
587 		 * attempts the suspend.  in do_join()
593 		 * The suspend is complete and this cpu has received a  in do_join()
599 		 * the load of info->done. It pairs with the barrier  in do_join()
600 		 * in the wakeup/prod path below.  in do_join()
603 		if (READ_ONCE(info->done) == false) {  in do_join()
613 		ret = -EIO;  in do_join()
621 		WRITE_ONCE(info->done, true);  in do_join()
623 		 * This barrier orders the store to info->done vs subsequent  in do_join()
625 		 * in the H_SUCCESS case above.  in do_join()
692 		 * in Suspending state, it's likely a transient  in pseries_suspend()
693 		 * condition related to some device in the partition  in pseries_suspend()
694 		 * and we can retry in the hope that the cause has  in pseries_suspend()
698 		 * for the suspend and avoid conditions which prevent  in pseries_suspend()
699 		 * the suspend from succeeding. For now, we have this  in pseries_suspend()
702 		pr_notice("Partition suspend attempt %u of %u error: %d\n",  in pseries_suspend()
711 				pr_notice("VASI state %lu after failed suspend\n",  in pseries_suspend()
715 		} else if (vasi_err != -EOPNOTSUPP) {  in pseries_suspend()
720 		pr_notice("Will retry partition suspend after %u ms\n",  in pseries_suspend()
761 		 * Wait until the memory transfer is complete, so that the user  in pseries_migrate_partition()
820 		return -ENOMEM;  in mobility_sysfs_init()