/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * s390x processor specific defines
 */
#ifndef SELFTEST_KVM_PROCESSOR_H
#define SELFTEST_KVM_PROCESSOR_H

#include <linux/compiler.h>

/* Bits in the region/segment table entry */
#define REGION_ENTRY_ORIGIN     ~0xfffUL /* region/segment table origin    */
#define REGION_ENTRY_PROTECT    0x200    /* region protection bit          */
#define REGION_ENTRY_NOEXEC     0x100    /* region no-execute bit          */
#define REGION_ENTRY_OFFSET     0xc0     /* region table offset            */
#define REGION_ENTRY_INVALID    0x20     /* invalid region table entry     */
#define REGION_ENTRY_TYPE       0x0c     /* region/segment table type mask */
#define REGION_ENTRY_LENGTH     0x03     /* region third length            */

/* Bits in the page table entry */
#define PAGE_INVALID    0x400           /* HW invalid bit    */
#define PAGE_PROTECT    0x200           /* HW read-only bit  */
#define PAGE_NOEXEC     0x100           /* HW no-execute bit */

/* Page size definitions */
#define PAGE_SHIFT 12
#define PAGE_SIZE BIT_ULL(PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE - 1))

/* Is there a portable way to do this? */
static inline void cpu_relax(void)
{
        barrier();
}

/* Get the instruction length */
static inline int insn_length(unsigned char code)
{
        return ((((int)code + 64) >> 7) + 1) << 1;
}

#endif