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/* Ignore unused weak functions which will have larger offsets */ 14#if defined(CONFIG_MPROFILE_KERNEL) || defined(CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY) 15#define FTRACE_MCOUNT_MAX_OFFSET 16 16#elif defined(CONFIG_PPC32) 17#define FTRACE_MCOUNT_MAX_OFFSET 8 18#endif 19 20#ifndef __ASSEMBLY__ 21extern void _mcount(void); 22 23unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip, 24 unsigned long sp); 25 26struct module; 27struct dyn_ftrace; 28struct dyn_arch_ftrace { 29 struct module *mod; 30}; 31 32#ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS 33#define ftrace_need_init_nop() (true) 34int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec); 35#define ftrace_init_nop ftrace_init_nop 36 37struct ftrace_regs { 38 struct pt_regs regs; 39}; 40 41static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs) 42{ 43 /* We clear regs.msr in ftrace_call */ 44 return fregs->regs.msr ? &fregs->regs : NULL; 45} 46 47static __always_inline void 48ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs, 49 unsigned long ip) 50{ 51 regs_set_return_ip(&fregs->regs, ip); 52} 53 54static __always_inline unsigned long 55ftrace_regs_get_instruction_pointer(struct ftrace_regs *fregs) 56{ 57 return instruction_pointer(&fregs->regs); 58} 59 60#define ftrace_regs_get_argument(fregs, n) \ 61 regs_get_kernel_argument(&(fregs)->regs, n) 62#define ftrace_regs_get_stack_pointer(fregs) \ 63 kernel_stack_pointer(&(fregs)->regs) 64#define ftrace_regs_return_value(fregs) \ 65 regs_return_value(&(fregs)->regs) 66#define ftrace_regs_set_return_value(fregs, ret) \ 67 regs_set_return_value(&(fregs)->regs, ret) 68#define ftrace_override_function_with_return(fregs) \ 69 override_function_with_return(&(fregs)->regs) 70#define ftrace_regs_query_register_offset(name) \ 71 regs_query_register_offset(name) 72 73struct ftrace_ops; 74 75#define ftrace_graph_func ftrace_graph_func 76void ftrace_graph_func(unsigned long ip, unsigned long parent_ip, 77 struct ftrace_ops *op, struct ftrace_regs *fregs); 78#endif 79#endif /* __ASSEMBLY__ */ 80 81#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS 82#define ARCH_SUPPORTS_FTRACE_OPS 1 83#endif 84#endif /* CONFIG_FUNCTION_TRACER */ 85 86#ifndef __ASSEMBLY__ 87#ifdef CONFIG_FTRACE_SYSCALLS 88/* 89 * Some syscall entry functions on powerpc start with "ppc_" (fork and clone, 90 * for instance) or ppc32_/ppc64_. We should also match the sys_ variant with 91 * those. 92 */ 93#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME 94static inline bool arch_syscall_match_sym_name(const char *sym, const char *name) 95{ 96 return !strcmp(sym, name) || 97 (!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) || 98 (!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) || 99 (!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) || 100 (!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4)); 101} 102#endif /* CONFIG_FTRACE_SYSCALLS */ 103 104#if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER) 105#include <asm/paca.h> 106 107static inline void this_cpu_disable_ftrace(void) 108{ 109 get_paca()->ftrace_enabled = 0; 110} 111 112static inline void this_cpu_enable_ftrace(void) 113{ 114 get_paca()->ftrace_enabled = 1; 115} 116 117/* Disable ftrace on this CPU if possible (may not be implemented) */ 118static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) 119{ 120 get_paca()->ftrace_enabled = ftrace_enabled; 121} 122 123static inline u8 this_cpu_get_ftrace_enabled(void) 124{ 125 return get_paca()->ftrace_enabled; 126} 127#else /* CONFIG_PPC64 */ 128static inline void this_cpu_disable_ftrace(void) { } 129static inline void this_cpu_enable_ftrace(void) { } 130static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { } 131static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; } 132#endif /* CONFIG_PPC64 */ 133 134#ifdef CONFIG_FUNCTION_TRACER 135extern unsigned int ftrace_tramp_text[], ftrace_tramp_init[]; 136void ftrace_free_init_tramp(void); 137unsigned long ftrace_call_adjust(unsigned long addr); 138#else 139static inline void ftrace_free_init_tramp(void) { } 140static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; } 141#endif 142#endif /* !__ASSEMBLY__ */ 143 144#endif /* _ASM_POWERPC_FTRACE */ 145