76222808fc
We originally added asm-prototypes.h in commit42f5b4cacd("powerpc: Introduce asm-prototypes.h"). It's purpose was for prototypes of C functions that are only called from asm, in order to fix sparse warnings about missing prototypes. A few months later Nick added a different use case in commit4efca4ed05("kbuild: modversions for EXPORT_SYMBOL() for asm") for C prototypes for exported asm functions. This is basically the inverse of our original usage. Since then we've added various prototypes to asm-prototypes.h for both reasons, meaning we now need to unstitch it all. Dispatch prototypes of C functions into relevant headers and keep only the prototypes for functions defined in assembly. For the time being, leave prom_init() there because moving it into asm/prom.h or asm/setup.h conflicts with drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowrom.o This will be fixed later by untaggling asm/pci.h and asm/prom.h or by renaming the function in shadowrom.c Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/62d46904eca74042097acf4cb12c175e3067f3d1.1646413435.git.christophe.leroy@csgroup.eu
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_FTRACE
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#define _ASM_POWERPC_FTRACE
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#include <asm/types.h>
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#ifdef CONFIG_FUNCTION_TRACER
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#define MCOUNT_ADDR ((unsigned long)(_mcount))
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#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
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#define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
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#ifndef __ASSEMBLY__
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extern void _mcount(void);
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static inline unsigned long ftrace_call_adjust(unsigned long addr)
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{
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/* relocation of mcount call site is the same as the address */
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return addr;
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}
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unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
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unsigned long sp);
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struct dyn_arch_ftrace {
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struct module *mod;
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};
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#ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS
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struct ftrace_regs {
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struct pt_regs regs;
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};
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static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
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{
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/* We clear regs.msr in ftrace_call */
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return fregs->regs.msr ? &fregs->regs : NULL;
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}
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static __always_inline void ftrace_instruction_pointer_set(struct ftrace_regs *fregs,
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unsigned long ip)
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{
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regs_set_return_ip(&fregs->regs, ip);
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}
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struct ftrace_ops;
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#define ftrace_graph_func ftrace_graph_func
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void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
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struct ftrace_ops *op, struct ftrace_regs *fregs);
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#endif
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#endif /* __ASSEMBLY__ */
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#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
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#define ARCH_SUPPORTS_FTRACE_OPS 1
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#endif
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#endif /* CONFIG_FUNCTION_TRACER */
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_FTRACE_SYSCALLS
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/*
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* Some syscall entry functions on powerpc start with "ppc_" (fork and clone,
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* for instance) or ppc32_/ppc64_. We should also match the sys_ variant with
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* those.
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*/
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#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
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#ifdef PPC64_ELF_ABI_v1
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static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
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{
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/* We need to skip past the initial dot, and the __se_sys alias */
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return !strcmp(sym + 1, name) ||
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(!strncmp(sym, ".__se_sys", 9) && !strcmp(sym + 6, name)) ||
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(!strncmp(sym, ".ppc_", 5) && !strcmp(sym + 5, name + 4)) ||
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(!strncmp(sym, ".ppc32_", 7) && !strcmp(sym + 7, name + 4)) ||
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(!strncmp(sym, ".ppc64_", 7) && !strcmp(sym + 7, name + 4));
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}
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#else
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static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
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{
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return !strcmp(sym, name) ||
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(!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) ||
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(!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) ||
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(!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) ||
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(!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4));
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}
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#endif /* PPC64_ELF_ABI_v1 */
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#endif /* CONFIG_FTRACE_SYSCALLS */
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#ifdef CONFIG_PPC64
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#include <asm/paca.h>
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static inline void this_cpu_disable_ftrace(void)
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{
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get_paca()->ftrace_enabled = 0;
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}
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static inline void this_cpu_enable_ftrace(void)
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{
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get_paca()->ftrace_enabled = 1;
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}
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/* Disable ftrace on this CPU if possible (may not be implemented) */
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static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled)
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{
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get_paca()->ftrace_enabled = ftrace_enabled;
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}
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static inline u8 this_cpu_get_ftrace_enabled(void)
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{
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return get_paca()->ftrace_enabled;
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}
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#else /* CONFIG_PPC64 */
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static inline void this_cpu_disable_ftrace(void) { }
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static inline void this_cpu_enable_ftrace(void) { }
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static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { }
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static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; }
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#endif /* CONFIG_PPC64 */
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_POWERPC_FTRACE */
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