diff options
Diffstat (limited to 'arch/powerpc/include/asm/jump_label.h')
| -rw-r--r-- | arch/powerpc/include/asm/jump_label.h | 48 |
1 files changed, 30 insertions, 18 deletions
diff --git a/arch/powerpc/include/asm/jump_label.h b/arch/powerpc/include/asm/jump_label.h index ae098c438f00..d4eaba459a0e 100644 --- a/arch/powerpc/include/asm/jump_label.h +++ b/arch/powerpc/include/asm/jump_label.h @@ -1,45 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ #ifndef _ASM_POWERPC_JUMP_LABEL_H #define _ASM_POWERPC_JUMP_LABEL_H /* * Copyright 2010 Michael Ellerman, IBM Corp. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. */ +#ifndef __ASSEMBLER__ #include <linux/types.h> #include <asm/feature-fixups.h> +#include <asm/asm-const.h> #define JUMP_ENTRY_TYPE stringify_in_c(FTR_ENTRY_LONG) #define JUMP_LABEL_NOP_SIZE 4 -static __always_inline bool arch_static_branch(struct static_key *key) +static __always_inline bool arch_static_branch(struct static_key *key, bool branch) { asm goto("1:\n\t" - "nop\n\t" + "nop # arch_static_branch\n\t" ".pushsection __jump_table, \"aw\"\n\t" - JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t" + ".long 1b - ., %l[l_yes] - .\n\t" + JUMP_ENTRY_TYPE "%c0 - .\n\t" ".popsection \n\t" - : : "i" (key) : : l_yes); + : : "i" (&((char *)key)[branch]) : : l_yes); + + return false; +l_yes: + return true; +} + +static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch) +{ + asm goto("1:\n\t" + "b %l[l_yes] # arch_static_branch_jump\n\t" + ".pushsection __jump_table, \"aw\"\n\t" + ".long 1b - ., %l[l_yes] - .\n\t" + JUMP_ENTRY_TYPE "%c0 - .\n\t" + ".popsection \n\t" + : : "i" (&((char *)key)[branch]) : : l_yes); + return false; l_yes: return true; } -#ifdef CONFIG_PPC64 -typedef u64 jump_label_t; #else -typedef u32 jump_label_t; +#define ARCH_STATIC_BRANCH(LABEL, KEY) \ +1098: nop; \ + .pushsection __jump_table, "aw"; \ + .long 1098b - ., LABEL - .; \ + FTR_ENTRY_LONG KEY - .; \ + .popsection #endif -struct jump_entry { - jump_label_t code; - jump_label_t target; - jump_label_t key; -}; - #endif /* _ASM_POWERPC_JUMP_LABEL_H */ |