1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * livepatch.h - powerpc-specific Kernel Live Patching Core
 4 *
 5 * Copyright (C) 2015-2016, SUSE, IBM Corp.
 6 */
 7#ifndef _ASM_POWERPC_LIVEPATCH_H
 8#define _ASM_POWERPC_LIVEPATCH_H
 9
10#include <linux/sched.h>
 
11#include <linux/sched/task_stack.h>
12
13#ifdef CONFIG_LIVEPATCH_64
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
14static inline void klp_init_thread_info(struct task_struct *p)
15{
16	/* + 1 to account for STACK_END_MAGIC */
17	task_thread_info(p)->livepatch_sp = end_of_stack(p) + 1;
18}
19#else
20static inline void klp_init_thread_info(struct task_struct *p) { }
21#endif
22
23#endif /* _ASM_POWERPC_LIVEPATCH_H */

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