processor.h

 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