riscv/kernel/patch.c

1 // SPDX-License-Identifier: GPL-2.0-only
16 #include <asm/patch.h>
39  * reg-a0) or BUILD_BUG_ON failed with "idx >= __end_of_fixed_addresses".
75 		return -EINVAL;  in __patch_insn_set()
121 		return -EINVAL;  in __patch_insn_write()
190 		size = min(len, PAGE_SIZE * 2 - offset_in_page(addr));  in patch_insn_set()
196 		len -= size;  in patch_insn_set()
221 	 * Copy the instructions to the destination address, two pages at a time  in patch_insn_write()
225 		size = min(len, PAGE_SIZE * 2 - offset_in_page(addr));  in patch_insn_write()
232 		len -= size;  in patch_insn_write()
253 	struct patch_insn *patch = data;  in patch_text_cb()  local
256 	if (atomic_inc_return(&patch->cpu_count) == num_online_cpus()) {  in patch_text_cb()
257 		ret = patch_insn_write(patch->addr, patch->insns, patch->len);  in patch_text_cb()
265 		atomic_inc_return_release(&patch->cpu_count);  in patch_text_cb()
267 		while (atomic_read(&patch->cpu_count) <= num_online_cpus())  in patch_text_cb()
280 	struct patch_insn patch = {  in patch_text()  local
297 	ret = stop_machine_cpuslocked(patch_text_cb, &patch, cpu_online_mask);  in patch_text()