mirror of
https://github.com/torvalds/linux.git
synced 2026-06-04 20:46:48 +02:00
e4cf33ca48
Most architectures use pt_regs within ftrace_regs making a lot of the accessor functions just calls to the pt_regs internally. Instead of duplication this effort, use a HAVE_ARCH_FTRACE_REGS for architectures that have their own ftrace_regs that is not based on pt_regs and will define all the accessor functions, and for the architectures that just use pt_regs, it will leave it undefined, and the default accessor functions will be used. Note, this will also make it easier to add new accessor functions to ftrace_regs as it will mean having to touch less architectures. Cc: <linux-arch@vger.kernel.org> Cc: "x86@kernel.org" <x86@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: WANG Xuerui <kernel@xen0n.name> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Naveen N Rao <naveen@kernel.org> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Alexander Gordeev <agordeev@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@linux.ibm.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/20241010202114.2289f6fd@gandalf.local.home Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Acked-by: Heiko Carstens <hca@linux.ibm.com> # s390 Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> # powerpc Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_FTRACE
|
|
#define _ASM_POWERPC_FTRACE
|
|
|
|
#include <asm/types.h>
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
#define MCOUNT_ADDR ((unsigned long)(_mcount))
|
|
#define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */
|
|
|
|
/* Ignore unused weak functions which will have larger offsets */
|
|
#if defined(CONFIG_MPROFILE_KERNEL) || defined(CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY)
|
|
#define FTRACE_MCOUNT_MAX_OFFSET 16
|
|
#elif defined(CONFIG_PPC32)
|
|
#define FTRACE_MCOUNT_MAX_OFFSET 8
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
extern void _mcount(void);
|
|
|
|
unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip,
|
|
unsigned long sp);
|
|
|
|
struct module;
|
|
struct dyn_ftrace;
|
|
struct dyn_arch_ftrace {
|
|
struct module *mod;
|
|
};
|
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_ARGS
|
|
#define ftrace_need_init_nop() (true)
|
|
int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
|
|
#define ftrace_init_nop ftrace_init_nop
|
|
|
|
#include <linux/ftrace_regs.h>
|
|
|
|
static __always_inline struct pt_regs *arch_ftrace_get_regs(struct ftrace_regs *fregs)
|
|
{
|
|
/* We clear regs.msr in ftrace_call */
|
|
return arch_ftrace_regs(fregs)->regs.msr ? &arch_ftrace_regs(fregs)->regs : NULL;
|
|
}
|
|
|
|
static __always_inline void
|
|
ftrace_regs_set_instruction_pointer(struct ftrace_regs *fregs,
|
|
unsigned long ip)
|
|
{
|
|
regs_set_return_ip(&arch_ftrace_regs(fregs)->regs, ip);
|
|
}
|
|
|
|
struct ftrace_ops;
|
|
|
|
#define ftrace_graph_func ftrace_graph_func
|
|
void ftrace_graph_func(unsigned long ip, unsigned long parent_ip,
|
|
struct ftrace_ops *op, struct ftrace_regs *fregs);
|
|
#endif
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS
|
|
#define ARCH_SUPPORTS_FTRACE_OPS 1
|
|
#endif
|
|
#endif /* CONFIG_FUNCTION_TRACER */
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#ifdef CONFIG_FTRACE_SYSCALLS
|
|
/*
|
|
* Some syscall entry functions on powerpc start with "ppc_" (fork and clone,
|
|
* for instance) or ppc32_/ppc64_. We should also match the sys_ variant with
|
|
* those.
|
|
*/
|
|
#define ARCH_HAS_SYSCALL_MATCH_SYM_NAME
|
|
static inline bool arch_syscall_match_sym_name(const char *sym, const char *name)
|
|
{
|
|
return !strcmp(sym, name) ||
|
|
(!strncmp(sym, "__se_sys", 8) && !strcmp(sym + 5, name)) ||
|
|
(!strncmp(sym, "ppc_", 4) && !strcmp(sym + 4, name + 4)) ||
|
|
(!strncmp(sym, "ppc32_", 6) && !strcmp(sym + 6, name + 4)) ||
|
|
(!strncmp(sym, "ppc64_", 6) && !strcmp(sym + 6, name + 4));
|
|
}
|
|
#endif /* CONFIG_FTRACE_SYSCALLS */
|
|
|
|
#if defined(CONFIG_PPC64) && defined(CONFIG_FUNCTION_TRACER)
|
|
#include <asm/paca.h>
|
|
|
|
static inline void this_cpu_disable_ftrace(void)
|
|
{
|
|
get_paca()->ftrace_enabled = 0;
|
|
}
|
|
|
|
static inline void this_cpu_enable_ftrace(void)
|
|
{
|
|
get_paca()->ftrace_enabled = 1;
|
|
}
|
|
|
|
/* Disable ftrace on this CPU if possible (may not be implemented) */
|
|
static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled)
|
|
{
|
|
get_paca()->ftrace_enabled = ftrace_enabled;
|
|
}
|
|
|
|
static inline u8 this_cpu_get_ftrace_enabled(void)
|
|
{
|
|
return get_paca()->ftrace_enabled;
|
|
}
|
|
#else /* CONFIG_PPC64 */
|
|
static inline void this_cpu_disable_ftrace(void) { }
|
|
static inline void this_cpu_enable_ftrace(void) { }
|
|
static inline void this_cpu_set_ftrace_enabled(u8 ftrace_enabled) { }
|
|
static inline u8 this_cpu_get_ftrace_enabled(void) { return 1; }
|
|
#endif /* CONFIG_PPC64 */
|
|
|
|
#ifdef CONFIG_FUNCTION_TRACER
|
|
extern unsigned int ftrace_tramp_text[], ftrace_tramp_init[];
|
|
void ftrace_free_init_tramp(void);
|
|
unsigned long ftrace_call_adjust(unsigned long addr);
|
|
#else
|
|
static inline void ftrace_free_init_tramp(void) { }
|
|
static inline unsigned long ftrace_call_adjust(unsigned long addr) { return addr; }
|
|
#endif
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_POWERPC_FTRACE */
|