Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Emil Renner Berthing |
78 |
53.06% |
1 |
16.67% |
| Alice Ryhl |
28 |
19.05% |
1 |
16.67% |
| George Guo |
21 |
14.29% |
1 |
16.67% |
| Linus Torvalds |
13 |
8.84% |
1 |
16.67% |
| JiSheng Zhang |
4 |
2.72% |
1 |
16.67% |
| Samuel Holland |
3 |
2.04% |
1 |
16.67% |
| Total |
147 |
|
6 |
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2020 Emil Renner Berthing
*
* Based on arch/arm64/include/asm/jump_label.h
*/
#ifndef __ASM_JUMP_LABEL_H
#define __ASM_JUMP_LABEL_H
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <asm/asm.h>
#define HAVE_JUMP_LABEL_BATCH
#define JUMP_LABEL_NOP_SIZE 4
#define JUMP_TABLE_ENTRY(key, label) \
".pushsection __jump_table, \"aw\" \n\t" \
".align " RISCV_LGPTR " \n\t" \
".long 1b - ., " label " - . \n\t" \
"" RISCV_PTR " " key " - . \n\t" \
".popsection \n\t"
/* This macro is also expanded on the Rust side. */
#define ARCH_STATIC_BRANCH_ASM(key, label) \
" .align 2 \n\t" \
" .option push \n\t" \
" .option norelax \n\t" \
" .option norvc \n\t" \
"1: nop \n\t" \
" .option pop \n\t" \
JUMP_TABLE_ENTRY(key, label)
static __always_inline bool arch_static_branch(struct static_key * const key,
const bool branch)
{
asm goto(
ARCH_STATIC_BRANCH_ASM("%0", "%l[label]")
: : "i"(&((char *)key)[branch]) : : label);
return false;
label:
return true;
}
#define ARCH_STATIC_BRANCH_JUMP_ASM(key, label) \
" .align 2 \n\t" \
" .option push \n\t" \
" .option norelax \n\t" \
" .option norvc \n\t" \
"1: j " label " \n\t" \
" .option pop \n\t" \
JUMP_TABLE_ENTRY(key, label)
static __always_inline bool arch_static_branch_jump(struct static_key * const key,
const bool branch)
{
asm goto(
ARCH_STATIC_BRANCH_JUMP_ASM("%0", "%l[label]")
: : "i"(&((char *)key)[branch]) : : label);
return false;
label:
return true;
}
#endif /* __ASSEMBLY__ */
#endif /* __ASM_JUMP_LABEL_H */