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 /* We clear regs.msr in ftrace_call */ 34 return fregs->regs.msr ? &fregs->regs : NULL; 35 } 36 37 static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs, 38 unsigned long ip) 39 { 40 regs_set_return_ip(&fregs->regs, ip); 41 } 42 43 struct ftrace_ops; 44 45 #define ftrace_graph_func ftrace_graph_func 46 void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, 47 struct ftrace_ops *op, struct ftrace_regs *fregs); 48 #endif 49 #endif /* __ASSEMBLY__ */ 50 51 #ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 52 #define ARCH_SUPPORTS_FTRACE_OPS 1 53 #endif 54 #endif /* CONFIG_FUNCTION_TRACER */ 55 56 #ifndef __ASSEMBLY__ 57 #ifdef CONFIG_FTRACE_SYSCALLS 58 /* 59 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone, 60 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with 61 * those. 62 */ 63 #define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 64 #ifdef PPC64_ELF_ABI_v1 65 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 66 { 67 /* We need to skip past the initial dot, and the __se_sys alias */ 68 return !strcmp(sym + 1, name) || 69 (!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) || 70 (!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) || 71 (!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) || 72 (!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4)); 73 } 74 #else 75 static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 76 { 77 return !strcmp(sym, name) || 78 (!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) || 79 (!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) || 80 (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) || 81 (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4)); 82 } 83 #endif /* PPC64_ELF_ABI_v1 */ 84 #endif /* CONFIG_FTRACE_SYSCALLS */ 85 86 #ifdef CONFIG_PPC64 87 #include <asm/paca.h> 88 89 static inline void this_cpu_disable_ftrace(void) 90 { 91 get_paca()->ftrace_enabled = 0; 92 } 93 94 static inline void this_cpu_enable_ftrace(void) 95 { 96 get_paca()->ftrace_enabled = 1; 97 } 98 99 /* Disable ftrace on this CPU if possible (may not be implemented) */ 100 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) 101 { 102 get_paca()->ftrace_enabled = ftrace_enabled; 103 } 104 105 static inline u8 this_cpu_get_ftrace_enabled(void) 106 { 107 return get_paca()->ftrace_enabled; 108 } 109 110 #else /* CONFIG_PPC64 */ 111 static inline void this_cpu_disable_ftrace(void) { } 112 static inline void this_cpu_enable_ftrace(void) { } 113 static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { } 114 static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; } 115 #endif /* CONFIG_PPC64 */ 116 #endif /* !__ASSEMBLY__ */ 117 118 #endif /* _ASM_POWERPC_FTRACE */ 119