linux/arch/s390/include/asm/compat.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390X_COMPAT_H
#define _ASM_S390X_COMPAT_H
/*
 * Architecture specific compatibility types
 */
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <linux/thread_info.h>

#define compat_mode_t	compat_mode_t
typedef u16		compat_mode_t;

#include <asm-generic/compat.h>

#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p( \
				typeof(0?(__force t)0:0ULL), u64))

#define __SC_DELOUSE(t,v) ({ \
	BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
	(__force t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
})

#define PSW32_MASK_PER		0x40000000UL
#define PSW32_MASK_DAT		0x04000000UL
#define PSW32_MASK_IO		0x02000000UL
#define PSW32_MASK_EXT		0x01000000UL
#define PSW32_MASK_KEY		0x00F00000UL
#define PSW32_MASK_BASE		0x00080000UL	/* Always one */
#define PSW32_MASK_MCHECK	0x00040000UL
#define PSW32_MASK_WAIT		0x00020000UL
#define PSW32_MASK_PSTATE	0x00010000UL
#define PSW32_MASK_ASC		0x0000C000UL
#define PSW32_MASK_CC		0x00003000UL
#define PSW32_MASK_PM		0x00000f00UL
#define PSW32_MASK_RI		0x00000080UL

#define PSW32_MASK_USER		0x0000FF00UL

#define PSW32_ADDR_AMODE	0x80000000UL
#define PSW32_ADDR_INSN		0x7FFFFFFFUL

#define PSW32_DEFAULT_KEY	(((u32) PAGE_DEFAULT_ACC) << 20)

#define PSW32_ASC_PRIMARY	0x00000000UL
#define PSW32_ASC_ACCREG	0x00004000UL
#define PSW32_ASC_SECONDARY	0x00008000UL
#define PSW32_ASC_HOME		0x0000C000UL

#define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \
			 PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \
			 PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
			 PSW32_ASC_PRIMARY)

#define COMPAT_USER_HZ		100
#define COMPAT_UTS_MACHINE	"s390\0\0\0\0"

typedef u16		__compat_uid_t;
typedef u16		__compat_gid_t;
typedef u16		compat_dev_t;
typedef u16		compat_nlink_t;
typedef u16		compat_ipc_pid_t;
typedef __kernel_fsid_t	compat_fsid_t;

typedef struct {
	u32 mask;
	u32 addr;
} __aligned(8) psw_compat_t;

typedef struct {
	psw_compat_t psw;
	u32 gprs[NUM_GPRS];
	u32 acrs[NUM_ACRS];
	u32 orig_gpr2;
} s390_compat_regs;

typedef struct {
	u32 gprs_high[NUM_GPRS];
} s390_compat_regs_high;

struct compat_stat {
	compat_dev_t	st_dev;
	u16		__pad1;
	compat_ino_t	st_ino;
	compat_mode_t	st_mode;
	compat_nlink_t	st_nlink;
	__compat_uid_t	st_uid;
	__compat_gid_t	st_gid;
	compat_dev_t	st_rdev;
	u16		__pad2;
	u32		st_size;
	u32		st_blksize;
	u32		st_blocks;
	u32		st_atime;
	u32		st_atime_nsec;
	u32		st_mtime;
	u32		st_mtime_nsec;
	u32		st_ctime;
	u32		st_ctime_nsec;
	u32		__unused4;
	u32		__unused5;
};

struct compat_flock {
	short		l_type;
	short		l_whence;
	compat_off_t	l_start;
	compat_off_t	l_len;
	compat_pid_t	l_pid;
};

#define F_GETLK64       12
#define F_SETLK64       13
#define F_SETLKW64      14    

struct compat_flock64 {
	short		l_type;
	short		l_whence;
	compat_loff_t	l_start;
	compat_loff_t	l_len;
	compat_pid_t	l_pid;
};

struct compat_statfs {
	u32		f_type;
	u32		f_bsize;
	u32		f_blocks;
	u32		f_bfree;
	u32		f_bavail;
	u32		f_files;
	u32		f_ffree;
	compat_fsid_t	f_fsid;
	u32		f_namelen;
	u32		f_frsize;
	u32		f_flags;
	u32		f_spare[4];
};

struct compat_statfs64 {
	u32		f_type;
	u32		f_bsize;
	u64		f_blocks;
	u64		f_bfree;
	u64		f_bavail;
	u64		f_files;
	u64		f_ffree;
	compat_fsid_t	f_fsid;
	u32		f_namelen;
	u32		f_frsize;
	u32		f_flags;
	u32		f_spare[4];
};

#define COMPAT_RLIM_INFINITY		0xffffffff

#define COMPAT_OFF_T_MAX	0x7fffffff

/*
 * A pointer passed in from user mode. This should not
 * be used for syscall parameters, just declare them
 * as pointers because the syscall entry code will have
 * appropriately converted them already.
 */

static inline void __user *compat_ptr(compat_uptr_t uptr)
{
	return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
}
#define compat_ptr(uptr) compat_ptr(uptr)

#ifdef CONFIG_COMPAT

static inline int is_compat_task(void)
{
	return test_thread_flag(TIF_31BIT);
}

static inline void __user *arch_compat_alloc_user_space(long len)
{
	unsigned long stack;

	stack = KSTK_ESP(current);
	if (is_compat_task())
		stack &= 0x7fffffffUL;
	return (void __user *) (stack - len);
}

#endif

struct compat_ipc64_perm {
	compat_key_t key;
	__compat_uid32_t uid;
	__compat_gid32_t gid;
	__compat_uid32_t cuid;
	__compat_gid32_t cgid;
	compat_mode_t mode;
	unsigned short __pad1;
	unsigned short seq;
	unsigned short __pad2;
	unsigned int __unused1;
	unsigned int __unused2;
};

struct compat_semid64_ds {
	struct compat_ipc64_perm sem_perm;
	compat_ulong_t sem_otime;
	compat_ulong_t sem_otime_high;
	compat_ulong_t sem_ctime;
	compat_ulong_t sem_ctime_high;
	compat_ulong_t sem_nsems;
	compat_ulong_t __unused1;
	compat_ulong_t __unused2;
};

struct compat_msqid64_ds {
	struct compat_ipc64_perm msg_perm;
	compat_ulong_t msg_stime;
	compat_ulong_t msg_stime_high;
	compat_ulong_t msg_rtime;
	compat_ulong_t msg_rtime_high;
	compat_ulong_t msg_ctime;
	compat_ulong_t msg_ctime_high;
	compat_ulong_t msg_cbytes;
	compat_ulong_t msg_qnum;
	compat_ulong_t msg_qbytes;
	compat_pid_t   msg_lspid;
	compat_pid_t   msg_lrpid;
	compat_ulong_t __unused1;
	compat_ulong_t __unused2;
};

struct compat_shmid64_ds {
	struct compat_ipc64_perm shm_perm;
	compat_size_t  shm_segsz;
	compat_ulong_t shm_atime;
	compat_ulong_t shm_atime_high;
	compat_ulong_t shm_dtime;
	compat_ulong_t shm_dtime_high;
	compat_ulong_t shm_ctime;
	compat_ulong_t shm_ctime_high;
	compat_pid_t   shm_cpid;
	compat_pid_t   shm_lpid;
	compat_ulong_t shm_nattch;
	compat_ulong_t __unused1;
	compat_ulong_t __unused2;
};
#endif /* _ASM_S390X_COMPAT_H */