/* * livepatch.h - powerpc-specific Kernel Live Patching Core * * Copyright (C) 2015-2016, SUSE, IBM Corp. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */#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_LIVEPATCHstatic inline int klp_check_compiler_support(void){	return 0;} 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_locationstatic 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;}#elsestatic inline void klp_init_thread_info(struct task_struct *p) { }#endif /* CONFIG_LIVEPATCH */ #endif /* _ASM_POWERPC_LIVEPATCH_H */