/* 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 */