1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_FTRACE 3 #define _ASM_POWERPC_FTRACE 4 5 #include <asm/types.h> 6 7 #ifdef CONFIG_FUNCTION_TRACER 8 #define MCOUNT_ADDR ((unsigned long)(_mcount)) 9 #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ 10 11 /* Ignore unused weak functions which will have larger offsets */ 12 #if defined(CONFIG_MPROFILE_KERNEL) || defined(CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY) 13 #define FTRACE_MCOUNT_MAX_OFFSET 16 14 #elif defined(CONFIG_PPC32) 15 #define FTRACE_MCOUNT_MAX_OFFSET 8 16 #endif 17 18 #ifndef __ASSEMBLY__ 19 extern void _mcount(void); 20 21 unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip, 22 unsigned long sp); 23 24 struct module; 25 struct dyn_ftrace; 26 struct dyn_arch_ftrace { 27 struct module *mod; 28 }; 29 30 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS 31 #define ftrace_need_init_nop() (true) 32 int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); 33 #define ftrace_init_nop ftrace_init_nop 34 35 #include <linux/ftrace_regs.h> 36 37 static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) 38 { 39 /* We clear regs.msr in ftrace_call */ 40 return arch_ftrace_regs(fregs)->regs.msr ? &arch_ftrace_regs(fregs)->regs : NULL; 41 } 42 43 static __always_inline void 44 ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs, 45 unsigned long ip) 46 { 47 regs_set_return_ip(&arch_ftrace_regs(fregs)->regs, ip); 48 } 49 50 struct ftrace_ops; 51 52 #define ftrace_graph_func ftrace_graph_func 53 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, 54 struct ftrace_ops *op, struct ftrace_regs *fregs); 55 #endif 56 #endif /* __ASSEMBLY__ */ 57 58 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 59 #define ARCH_SUPPORTS_FTRACE_OPS 1 60 #endif 61 #endif /* CONFIG_FUNCTION_TRACER */ 62 63 #ifndef __ASSEMBLY__ 64 #ifdef CONFIG_FTRACE_SYSCALLS 65 /* 66 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone, 67 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with 68 * those. 69 */ 70 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 71 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 72 { 73 return !strcmp(sym, name) || 74 (!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) || 75 (!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) || 76 (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) || 77 (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4)); 78 } 79 #endif /* CONFIG_FTRACE_SYSCALLS */ 80 81 #if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER) 82 #include <asm/paca.h> 83 84 static inline void this_cpu_disable_ftrace(void) 85 { 86 get_paca()->ftrace_enabled = 0; 87 } 88 89 static inline void this_cpu_enable_ftrace(void) 90 { 91 get_paca()->ftrace_enabled = 1; 92 } 93 94 /* Disable ftrace on this CPU if possible (may not be implemented) */ 95 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) 96 { 97 get_paca()->ftrace_enabled = ftrace_enabled; 98 } 99 100 static inline u8 this_cpu_get_ftrace_enabled(void) 101 { 102 return get_paca()->ftrace_enabled; 103 } 104 #else /* CONFIG_PPC64 */ 105 static inline void this_cpu_disable_ftrace(void) { } 106 static inline void this_cpu_enable_ftrace(void) { } 107 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { } 108 static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; } 109 #endif /* CONFIG_PPC64 */ 110 111 #ifdef CONFIG_FUNCTION_TRACER 112 extern unsigned int ftrace_tramp_text[], ftrace_tramp_init[]; 113 void ftrace_free_init_tramp(void); 114 unsigned long ftrace_call_adjust(unsigned long addr); 115 #else 116 static inline void ftrace_free_init_tramp(void) { } 117 static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; } 118 #endif 119 #endif /* !__ASSEMBLY__ */ 120 121 #endif /* _ASM_POWERPC_FTRACE */ 122