304103736b
save_access_regs() and restore_access_regs() are only available by including switch_to.h. This is done by a couple of C files, which have nothing to do with switch_to(), but only need these functions. Move both functions to a new header file and improve the implementation: - Get rid of typedef - Add memory access instrumentation support - Use long displacement instructions lamy/stamy instead of lam/stam - all current users end up with better code because of this Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
38 lines
806 B
C
38 lines
806 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 1999, 2024
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*/
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#ifndef __ASM_S390_ACCESS_REGS_H
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#define __ASM_S390_ACCESS_REGS_H
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#include <linux/instrumented.h>
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#include <asm/sigcontext.h>
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struct access_regs {
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unsigned int regs[NUM_ACRS];
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};
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static inline void save_access_regs(unsigned int *acrs)
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{
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struct access_regs *regs = (struct access_regs *)acrs;
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instrument_write(regs, sizeof(*regs));
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asm volatile("stamy 0,15,%[regs]"
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: [regs] "=QS" (*regs)
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:
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: "memory");
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}
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static inline void restore_access_regs(unsigned int *acrs)
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{
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struct access_regs *regs = (struct access_regs *)acrs;
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instrument_read(regs, sizeof(*regs));
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asm volatile("lamy 0,15,%[regs]"
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:
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: [regs] "QS" (*regs)
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: "memory");
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}
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#endif /* __ASM_S390_ACCESS_REGS_H */
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