1 // SPDX-License-Identifier: GPL-2.0-only
32  * Hypervisor reports ADI capabilities of platform in "hwcap-list" property
33  * for "cpu" node. If the platform supports ADI, "hwcap-list" property
34  * contains the keyword "adp". If the platform supports ADI, "platform"
35  * node will contain "adp-blksz", "adp-nbits" and "ue-on-adp" properties
52 	prop = mdesc_get_property(hp, pn, "hwcap-list", &len);  in mdesc_adi_init()
57 	 * Look for "adp" keyword in hwcap-list which would indicate  in mdesc_adi_init()
64 		if (!strcmp(prop, "adp")) {  in mdesc_adi_init()
71 		len -= plen;  in mdesc_adi_init()
85 	val = (u64 *) mdesc_get_property(hp, pn, "adp-blksz", &len);  in mdesc_adi_init()
90 	val = (u64 *) mdesc_get_property(hp, pn, "adp-nbits", &len);  in mdesc_adi_init()
95 	val = (u64 *) mdesc_get_property(hp, pn, "ue-on-adp", &len);  in mdesc_adi_init()
104 	 * disable ADI support so we do not get unpredictable results  in mdesc_adi_init()
135 	if (mm->context.tag_store) {  in find_tag_store()
136 		tag_desc = mm->context.tag_store;  in find_tag_store()
137 		spin_lock_irqsave(&mm->context.tag_lock, flags);  in find_tag_store()
139 			if ((addr >= tag_desc->start) &&  in find_tag_store()
140 			    ((addr + PAGE_SIZE - 1) <= tag_desc->end))  in find_tag_store()
144 		spin_unlock_irqrestore(&mm->context.tag_lock, flags);  in find_tag_store()
169 	end_addr = addr + PAGE_SIZE - 1;  in alloc_tag_store()
174 	spin_lock_irqsave(&mm->context.tag_lock, flags);  in alloc_tag_store()
175 	if (mm->context.tag_store) {  in alloc_tag_store()
176 		tag_desc = mm->context.tag_store;  in alloc_tag_store()
184 			if (tag_desc->tag_users == 0) {  in alloc_tag_store()
188 				if ((addr >= tag_desc->start) &&  in alloc_tag_store()
189 				    (tag_desc->end >= (addr + PAGE_SIZE - 1))) {  in alloc_tag_store()
190 					tag_desc->tag_users++;  in alloc_tag_store()
194 			if ((tag_desc->start > end_addr) &&  in alloc_tag_store()
195 			    (tag_desc->start < hole_end))  in alloc_tag_store()
196 				hole_end = tag_desc->start;  in alloc_tag_store()
197 			if ((tag_desc->end < addr) &&  in alloc_tag_store()
198 			    (tag_desc->end > hole_start))  in alloc_tag_store()
199 				hole_start = tag_desc->end;  in alloc_tag_store()
205 		mm->context.tag_store = kzalloc(size, GFP_NOWAIT|__GFP_NOWARN);  in alloc_tag_store()
206 		if (mm->context.tag_store == NULL) {  in alloc_tag_store()
210 		tag_desc = mm->context.tag_store;  in alloc_tag_store()
212 			tag_desc->tag_users = 0;  in alloc_tag_store()
213 		open_desc = mm->context.tag_store;  in alloc_tag_store()
225 	tag_desc->tag_users = 1;  in alloc_tag_store()
239 	end_addr = addr + (size*2*adi_blksize()) - 1;  in alloc_tag_store()
243 		end_addr = addr + (size*2*adi_blksize()) - 1;  in alloc_tag_store()
258 		end_addr = hole_end - 1;  in alloc_tag_store()
259 		tmp_addr = end_addr - (size*2*adi_blksize()) + 1;  in alloc_tag_store()
265 			tmp_addr = end_addr - (size*2*adi_blksize()) - 1;  in alloc_tag_store()
280 		size = (end_addr + 1 - addr)/(2*adi_blksize());  in alloc_tag_store()
281 		size = (size + (PAGE_SIZE-adi_blksize()))/PAGE_SIZE;  in alloc_tag_store()
286 		tag_desc->tag_users = 0;  in alloc_tag_store()
290 	tag_desc->start = addr;  in alloc_tag_store()
291 	tag_desc->tags = tags;  in alloc_tag_store()
292 	tag_desc->end = end_addr;  in alloc_tag_store()
295 	spin_unlock_irqrestore(&mm->context.tag_lock, flags);  in alloc_tag_store()
304 	spin_lock_irqsave(&mm->context.tag_lock, flags);  in del_tag_store()
305 	tag_desc->tag_users--;  in del_tag_store()
306 	if (tag_desc->tag_users == 0) {  in del_tag_store()
307 		tag_desc->start = tag_desc->end = 0;  in del_tag_store()
312 		if (tag_desc != mm->context.tag_store) {  in del_tag_store()
313 			tags = tag_desc->tags;  in del_tag_store()
314 			tag_desc->tags = NULL;  in del_tag_store()
317 	spin_unlock_irqrestore(&mm->context.tag_lock, flags);  in del_tag_store()
322 	((tag_desc)->tags + ((addr - (tag_desc)->start)/(2*adi_blksize())))
379 		return -1;  in adi_save_tags()