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 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 12 13 #ifndef __ASSEMBLY__ 14 extern void _mcount(void); 15 16 static inline unsigned long ftrace_call_adjust(unsigned long addr) 17 { 18 /* relocation of mcount call site is the same as the address */ 19 return addr; 20 } 21 22 struct dyn_arch_ftrace { 23 struct module *mod; 24 }; 25 26 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS 27 struct ftrace_regs { 28 struct pt_regs regs; 29 }; 30 31 static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) 32 { 33 return &fregs->regs; 34 } 35 36 static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs, 37 unsigned long ip) 38 { 39 regs_set_return_ip(&fregs->regs, ip); 40 } 41 42 struct ftrace_ops; 43 44 #define ftrace_graph_func ftrace_graph_func 45 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, 46 struct ftrace_ops *op, struct ftrace_regs *fregs); 47 #endif 48 #endif /* __ASSEMBLY__ */ 49 50 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 51 #define ARCH_SUPPORTS_FTRACE_OPS 1 52 #endif 53 #endif /* CONFIG_FUNCTION_TRACER */ 54 55 #ifndef __ASSEMBLY__ 56 #ifdef CONFIG_FTRACE_SYSCALLS 57 /* 58 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone, 59 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with 60 * those. 61 */ 62 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 63 #ifdef PPC64_ELF_ABI_v1 64 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 65 { 66 /* We need to skip past the initial dot, and the __se_sys alias */ 67 return !strcmp(sym + 1, name) || 68 (!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) || 69 (!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) || 70 (!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) || 71 (!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4)); 72 } 73 #else 74 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 75 { 76 return !strcmp(sym, name) || 77 (!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) || 78 (!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) || 79 (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) || 80 (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4)); 81 } 82 #endif /* PPC64_ELF_ABI_v1 */ 83 #endif /* CONFIG_FTRACE_SYSCALLS */ 84 85 #ifdef CONFIG_PPC64 86 #include <asm/paca.h> 87 88 static inline void this_cpu_disable_ftrace(void) 89 { 90 get_paca()->ftrace_enabled = 0; 91 } 92 93 static inline void this_cpu_enable_ftrace(void) 94 { 95 get_paca()->ftrace_enabled = 1; 96 } 97 98 /* Disable ftrace on this CPU if possible (may not be implemented) */ 99 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) 100 { 101 get_paca()->ftrace_enabled = ftrace_enabled; 102 } 103 104 static inline u8 this_cpu_get_ftrace_enabled(void) 105 { 106 return get_paca()->ftrace_enabled; 107 } 108 109 #else /* CONFIG_PPC64 */ 110 static inline void this_cpu_disable_ftrace(void) { } 111 static inline void this_cpu_enable_ftrace(void) { } 112 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { } 113 static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; } 114 #endif /* CONFIG_PPC64 */ 115 #endif /* !__ASSEMBLY__ */ 116 117 #endif /* _ASM_POWERPC_FTRACE */ 118