1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2004-2005, IBM Corp.
48 	for (i = 0; i < image->nr_segments; i++)  in machine_kexec_prepare()
49 		if (image->segment[i].mem < __pa(_end))  in machine_kexec_prepare()
50 			return -ETXTBSY;  in machine_kexec_prepare()
54 		basep = of_get_property(node, "linux,tce-base", NULL);  in machine_kexec_prepare()
55 		sizep = of_get_property(node, "linux,tce-size", NULL);  in machine_kexec_prepare()
62 		for (i = 0; i < image->nr_segments; i++) {  in machine_kexec_prepare()
63 			begin = image->segment[i].mem;  in machine_kexec_prepare()
64 			end = begin + image->segment[i].memsz;  in machine_kexec_prepare()
68 				return -ETXTBSY;  in machine_kexec_prepare()
113 	long i, nr_segments = image->nr_segments;  in kexec_copy_flush()
117 	memcpy(ranges, image->segment, sizeof(ranges));  in kexec_copy_flush()
125 	copy_segments(image->head);  in kexec_copy_flush()
146 	get_paca()->kexec_state = KEXEC_STATE_IRQS_OFF;  in kexec_smp_down()
152 	 * Now every CPU has IRQs off, we can clear out any pending  in kexec_smp_down()
166 	int my_cpu, i, notified=-1;  in kexec_prepare_cpus_wait()
174 	 * start-cpu, but somehow that CPU doesn't write callin_cpu_map[] in  in kexec_prepare_cpus_wait()
176 	 * stuff, the secondary will start up (paca_ptrs[]->cpu_start was  in kexec_prepare_cpus_wait()
178 	 * If the platform supports smp_ops->take_timebase(), the secondary CPU  in kexec_prepare_cpus_wait()
180 	 * secondary will continue on and try to online itself/idle/etc. If it  in kexec_prepare_cpus_wait()
182 	 * possible-but-not-online-but-should-be CPUs and chaperone them into  in kexec_prepare_cpus_wait()
189 		while (paca_ptrs[i]->kexec_state < wait_state) {  in kexec_prepare_cpus_wait()
194 				       i, paca_ptrs[i]->hw_cpu_id, wait_state);  in kexec_prepare_cpus_wait()
204  * the device tree and assume primary threads are online and query secondary
206  * threads, they will be stuck.  However, we also online secondary threads as we
207  * may be using 'cede offline'.  In this case RTAS doesn't see the secondary
208  * threads as offline -- and again, these CPUs will be stuck.
210  * So, we online all CPUs that should be running, including secondary threads.
233 	get_paca()->kexec_state = KEXEC_STATE_IRQS_OFF;  in kexec_prepare_cpus()
257 	 * move the secondarys to us so that we can copy  in kexec_prepare_cpus()
258 	 * the new kernel 0-0x100 safely  in kexec_prepare_cpus()
277  * We need to make sure that this is 16384-byte aligned due to the
324 	current_thread_info()->flags = 0;  in default_machine_kexec()
325 	current_thread_info()->preempt_count = HARDIRQ_OFFSET;  in default_machine_kexec()
329 	 * non-static data.  in default_machine_kexec()
337 	if (is_secure_guest() && !(image->preserve_context ||  in default_machine_kexec()
338 				   image->type == KEXEC_TYPE_CRASH)) {  in default_machine_kexec()
350 	 * unregistered so there is not much we can do about it here.  in default_machine_kexec()
355 	 * using Radix page tables or we are not in an LPAR since we can  in default_machine_kexec()
358 	 * In an LPAR, we keep the MMU on otherwise we can't access beyond  in default_machine_kexec()
371 	 * a toc is easier in C, so pass in what we can.  in default_machine_kexec()
373 	kexec_sequence(&kexec_stack, image->start, image,  in default_machine_kexec()
374 		       page_address(image->control_code_page),  in default_machine_kexec()
385 	.name = "linux,htab-base",
391 	.name = "linux,htab-size",
402 		return -ENODEV;  in export_htab_values()
406 		return -ENODEV;  in export_htab_values()
408 	/* remove any stale properties so ours can be found */  in export_htab_values()