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Diffstat (limited to 'arch/powerpc/include/asm/livepatch.h')
| -rw-r--r-- | arch/powerpc/include/asm/livepatch.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/livepatch.h b/arch/powerpc/include/asm/livepatch.h new file mode 100644 index 000000000..4a3d5d25f --- /dev/null +++ b/arch/powerpc/include/asm/livepatch.h @@ -0,0 +1,39 @@ +/* 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 */ |