Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * livepatch.h - powerpc-specific Kernel Live Patching Core
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2015-2016, SUSE, IBM Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #ifndef _ASM_POWERPC_LIVEPATCH_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #define _ASM_POWERPC_LIVEPATCH_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/ftrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/sched/task_stack.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #ifdef CONFIG_LIVEPATCH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) static inline void klp_arch_set_pc(struct pt_regs *regs, unsigned long ip)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	regs->nip = ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define klp_get_ftrace_location klp_get_ftrace_location
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static inline unsigned long klp_get_ftrace_location(unsigned long faddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	 * Live patch works only with -mprofile-kernel on PPC. In this case,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	 * the ftrace location is always within the first 16 bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	return ftrace_location_range(faddr, faddr + 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static inline void klp_init_thread_info(struct task_struct *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	/* + 1 to account for STACK_END_MAGIC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	task_thread_info(p)->livepatch_sp = end_of_stack(p) + 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static inline void klp_init_thread_info(struct task_struct *p) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #endif /* CONFIG_LIVEPATCH */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #endif /* _ASM_POWERPC_LIVEPATCH_H */