access-regs.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * Copyright IBM Corp. 1999, 2024
 4 */
 5
 6#ifndef __ASM_S390_ACCESS_REGS_H
 7#define __ASM_S390_ACCESS_REGS_H
 8
 9#include <linux/instrumented.h>
10#include <asm/sigcontext.h>
11
12struct access_regs {
13	unsigned int regs[NUM_ACRS];
14};
15
16static inline void save_access_regs(unsigned int *acrs)
17{
18	struct access_regs *regs = (struct access_regs *)acrs;
19
20	instrument_write(regs, sizeof(*regs));
21	asm volatile("stamy	0,15,%[regs]"
22		     : [regs] "=QS" (*regs)
23		     :
24		     : "memory");
25}
26
27static inline void restore_access_regs(unsigned int *acrs)
28{
29	struct access_regs *regs = (struct access_regs *)acrs;
30
31	instrument_read(regs, sizeof(*regs));
32	asm volatile("lamy	0,15,%[regs]"
33		     :
34		     : [regs] "QS" (*regs)
35		     : "memory");
36}
37
38#endif /* __ASM_S390_ACCESS_REGS_H */