| /* SPDX-License-Identifier: GPL-2.0-or-later */ | |
| /* | |
| * livepatch.h - powerpc-specific Kernel Live Patching Core | |
| * | |
| * Copyright (C) 2015-2016, SUSE, IBM Corp. | |
| */ | |
| #ifndef _ASM_POWERPC_LIVEPATCH_H | |
| #define _ASM_POWERPC_LIVEPATCH_H | |
| #include <linux/module.h> | |
| #include <linux/ftrace.h> | |
| #include <linux/sched/task_stack.h> | |
| #ifdef CONFIG_LIVEPATCH | |
| static inline void klp_arch_set_pc(struct pt_regs *regs, unsigned long ip) | |
| { | |
| regs->nip = ip; | |
| } | |
| #define klp_get_ftrace_location klp_get_ftrace_location | |
| static inline unsigned long klp_get_ftrace_location(unsigned long faddr) | |
| { | |
| /* | |
| * Live patch works only with -mprofile-kernel on PPC. In this case, | |
| * the ftrace location is always within the first 16 bytes. | |
| */ | |
| return ftrace_location_range(faddr, faddr + 16); | |
| } | |
| static inline void klp_init_thread_info(struct task_struct *p) | |
| { | |
| /* + 1 to account for STACK_END_MAGIC */ | |
| task_thread_info(p)->livepatch_sp = end_of_stack(p) + 1; | |
| } | |
| #else | |
| static inline void klp_init_thread_info(struct task_struct *p) { } | |
| #endif /* CONFIG_LIVEPATCH */ | |
| #endif /* _ASM_POWERPC_LIVEPATCH_H */ |