1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_FTRACE
3 #define _ASM_POWERPC_FTRACE
7 #ifdef CONFIG_FUNCTION_TRACER
8 #define MCOUNT_ADDR ((unsigned long)(_mcount))
9 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
11 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
14 extern void _mcount(void);
16 static inline unsigned long ftrace_call_adjust(unsigned long addr)
18 /* relocation of mcount call site is the same as the address */
22 unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
25 struct dyn_arch_ftrace {
29 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS
34 static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
36 /* We clear regs.msr in ftrace_call */
37 return fregs->regs.msr ? &fregs->regs : NULL;
40 static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs,
43 regs_set_return_ip(&fregs->regs, ip);
48 #define ftrace_graph_func ftrace_graph_func
49 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
50 struct ftrace_ops *op, struct ftrace_regs *fregs);
52 #endif /* __ASSEMBLY__ */
54 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
55 #define ARCH_SUPPORTS_FTRACE_OPS 1
57 #endif /* CONFIG_FUNCTION_TRACER */
60 #ifdef CONFIG_FTRACE_SYSCALLS
62 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone,
63 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with
66 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
67 #ifdef CONFIG_PPC64_ELF_ABI_V1
68 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
70 /* We need to skip past the initial dot, and the __se_sys alias */
71 return !strcmp(sym + 1, name) ||
72 (!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) ||
73 (!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) ||
74 (!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) ||
75 (!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4));
78 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
80 return !strcmp(sym, name) ||
81 (!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) ||
82 (!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) ||
83 (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) ||
84 (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4));
86 #endif /* CONFIG_PPC64_ELF_ABI_V1 */
87 #endif /* CONFIG_FTRACE_SYSCALLS */
89 #if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER)
92 static inline void this_cpu_disable_ftrace(void)
94 get_paca()->ftrace_enabled = 0;
97 static inline void this_cpu_enable_ftrace(void)
99 get_paca()->ftrace_enabled = 1;
102 /* Disable ftrace on this CPU if possible (may not be implemented) */
103 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled)
105 get_paca()->ftrace_enabled = ftrace_enabled;
108 static inline u8 this_cpu_get_ftrace_enabled(void)
110 return get_paca()->ftrace_enabled;
113 void ftrace_free_init_tramp(void);
114 #else /* CONFIG_PPC64 */
115 static inline void this_cpu_disable_ftrace(void) { }
116 static inline void this_cpu_enable_ftrace(void) { }
117 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { }
118 static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; }
119 static inline void ftrace_free_init_tramp(void) { }
120 #endif /* CONFIG_PPC64 */
121 #endif /* !__ASSEMBLY__ */
123 #endif /* _ASM_POWERPC_FTRACE */