Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * s390x processor specific defines
4 */
5#ifndef SELFTEST_KVM_PROCESSOR_H
6#define SELFTEST_KVM_PROCESSOR_H
7
8#include <linux/compiler.h>
9
10/* Bits in the region/segment table entry */
11#define REGION_ENTRY_ORIGIN ~0xfffUL /* region/segment table origin */
12#define REGION_ENTRY_PROTECT 0x200 /* region protection bit */
13#define REGION_ENTRY_NOEXEC 0x100 /* region no-execute bit */
14#define REGION_ENTRY_OFFSET 0xc0 /* region table offset */
15#define REGION_ENTRY_INVALID 0x20 /* invalid region table entry */
16#define REGION_ENTRY_TYPE 0x0c /* region/segment table type mask */
17#define REGION_ENTRY_LENGTH 0x03 /* region third length */
18
19/* Bits in the page table entry */
20#define PAGE_INVALID 0x400 /* HW invalid bit */
21#define PAGE_PROTECT 0x200 /* HW read-only bit */
22#define PAGE_NOEXEC 0x100 /* HW no-execute bit */
23
24/* Page size definitions */
25#define PAGE_SHIFT 12
26#define PAGE_SIZE BIT_ULL(PAGE_SHIFT)
27#define PAGE_MASK (~(PAGE_SIZE - 1))
28
29/* Is there a portable way to do this? */
30static inline void cpu_relax(void)
31{
32 barrier();
33}
34
35/* Get the instruction length */
36static inline int insn_length(unsigned char code)
37{
38 return ((((int)code + 64) >> 7) + 1) << 1;
39}
40
41#endif