1 // SPDX-License-Identifier: GPL-2.0-or-later
49 	acpi_mp_wake_mailbox->apic_id = apicid;  in acpi_mp_cpu_die()
50 	smp_store_release(&acpi_mp_wake_mailbox->command,  in acpi_mp_cpu_die()
55 	while (READ_ONCE(acpi_mp_wake_mailbox->command) && --timeout)  in acpi_mp_cpu_die()
93 			return -ENOMEM;  in init_transition_pgtable()
100 			return -ENOMEM;  in init_transition_pgtable()
107 			return -ENOMEM;  in init_transition_pgtable()
114 			return -ENOMEM;  in init_transition_pgtable()
137 		return -ENOMEM;  in acpi_mp_setup_reset()
146 			return -ENOMEM;  in acpi_mp_setup_reset()
154 		return -ENOMEM;  in acpi_mp_setup_reset()
159 		return -ENOMEM;  in acpi_mp_setup_reset()
176 		return -EOPNOTSUPP;  in acpi_wakeup_cpu()
200 	acpi_mp_wake_mailbox->apic_id	    = apicid;  in acpi_wakeup_cpu()
201 	acpi_mp_wake_mailbox->wakeup_vector = start_ip;  in acpi_wakeup_cpu()
202 	smp_store_release(&acpi_mp_wake_mailbox->command,  in acpi_wakeup_cpu()
206 	 * Wait for the CPU to wake up.  in acpi_wakeup_cpu()
208 	 * The CPU being woken up is essentially in a spin loop waiting to be  in acpi_wakeup_cpu()
209 	 * woken up. It should not take long for it wake up and acknowledge by  in acpi_wakeup_cpu()
210 	 * zeroing out ->command.  in acpi_wakeup_cpu()
213 	 * has to wait for a wake up acknowledgment. It also doesn't provide  in acpi_wakeup_cpu()
214 	 * a way to cancel a wake up request if it takes too long.  in acpi_wakeup_cpu()
217 	 * wake up secondary. It can postpone scheduling secondary vCPU  in acpi_wakeup_cpu()
218 	 * indefinitely. Giving up on wake up request and reporting error opens  in acpi_wakeup_cpu()
219 	 * possible attack vector for VMM: it can wake up a secondary CPU when  in acpi_wakeup_cpu()
220 	 * kernel doesn't expect it. Wait until positive result of the wake up  in acpi_wakeup_cpu()
223 	while (READ_ONCE(acpi_mp_wake_mailbox->command))  in acpi_wakeup_cpu()
242 	 * already and acpi_wakeup_cpu() uses the cached value to bring up the  in acpi_mp_disable_offlining()
248 	mp_wake->mailbox_address = 0;  in acpi_mp_disable_offlining()
265 		return -EINVAL;  in acpi_parse_mp_wake()
266 	if (end - (unsigned long)mp_wake < ACPI_MADT_MP_WAKEUP_SIZE_V0)  in acpi_parse_mp_wake()
267 		return -EINVAL;  in acpi_parse_mp_wake()
268 	if (mp_wake->header.length < ACPI_MADT_MP_WAKEUP_SIZE_V0)  in acpi_parse_mp_wake()
269 		return -EINVAL;  in acpi_parse_mp_wake()
271 	acpi_table_print_madt_entry(&header->common);  in acpi_parse_mp_wake()
273 	acpi_mp_wake_mailbox_paddr = mp_wake->mailbox_address;  in acpi_parse_mp_wake()
275 	if (mp_wake->version >= ACPI_MADT_MP_WAKEUP_VERSION_V1 &&  in acpi_parse_mp_wake()
276 	    mp_wake->header.length >= ACPI_MADT_MP_WAKEUP_SIZE_V1) {  in acpi_parse_mp_wake()
277 		if (acpi_mp_setup_reset(mp_wake->reset_vector)) {  in acpi_parse_mp_wake()