Contributors: 8
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Peter Zijlstra |
40 |
27.40% |
1 |
10.00% |
| Jan Glauber |
33 |
22.60% |
1 |
10.00% |
| Ilya Leoshkevich |
31 |
21.23% |
1 |
10.00% |
| Heiko Carstens |
20 |
13.70% |
2 |
20.00% |
| Ingo Molnar |
12 |
8.22% |
2 |
20.00% |
| Anton Blanchard |
6 |
4.11% |
1 |
10.00% |
| Jason Baron |
3 |
2.05% |
1 |
10.00% |
| Greg Kroah-Hartman |
1 |
0.68% |
1 |
10.00% |
| Total |
146 |
|
10 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_JUMP_LABEL_H
#define _ASM_S390_JUMP_LABEL_H
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <linux/stringify.h>
#define JUMP_LABEL_NOP_SIZE 6
#define JUMP_LABEL_NOP_OFFSET 2
#if __GNUC__ < 9
#define JUMP_LABEL_STATIC_KEY_CONSTRAINT "X"
#else
#define JUMP_LABEL_STATIC_KEY_CONSTRAINT "jdd"
#endif
/*
* We use a brcl 0,2 instruction for jump labels at compile time so it
* can be easily distinguished from a hotpatch generated instruction.
*/
static inline bool arch_static_branch(struct static_key *key, bool branch)
{
asm_volatile_goto("0: brcl 0,"__stringify(JUMP_LABEL_NOP_OFFSET)"\n"
".pushsection __jump_table,\"aw\"\n"
".balign 8\n"
".long 0b-.,%l[label]-.\n"
".quad %0+%1-.\n"
".popsection\n"
: : JUMP_LABEL_STATIC_KEY_CONSTRAINT (key), "i" (branch) : : label);
return false;
label:
return true;
}
static inline bool arch_static_branch_jump(struct static_key *key, bool branch)
{
asm_volatile_goto("0: brcl 15,%l[label]\n"
".pushsection __jump_table,\"aw\"\n"
".balign 8\n"
".long 0b-.,%l[label]-.\n"
".quad %0+%1-.\n"
".popsection\n"
: : JUMP_LABEL_STATIC_KEY_CONSTRAINT (key), "i" (branch) : : label);
return false;
label:
return true;
}
#endif /* __ASSEMBLY__ */
#endif