1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_S390X_COMPAT_H
3#define _ASM_S390X_COMPAT_H
4/*
5 * Architecture specific compatibility types
6 */
7#include <linux/types.h>
8#include <linux/sched.h>
9#include <linux/sched/task_stack.h>
10#include <linux/thread_info.h>
11#include <asm/ptrace.h>
12
13#define compat_mode_t	compat_mode_t
14typedef u16		compat_mode_t;
15
16#define __compat_uid_t	__compat_uid_t
17typedef u16		__compat_uid_t;
18typedef u16		__compat_gid_t;
19
20#define compat_dev_t	compat_dev_t
21typedef u16		compat_dev_t;
22
23#define compat_ipc_pid_t compat_ipc_pid_t
24typedef u16		 compat_ipc_pid_t;
25
26#define compat_statfs	compat_statfs
27
28#include <asm-generic/compat.h>
29
30#define __TYPE_IS_PTR(t) (!__builtin_types_compatible_p( \
31				typeof(0?(__force t)0:0ULL), u64))
32
33#define __SC_DELOUSE(t,v) ({ \
34	BUILD_BUG_ON(sizeof(t) > 4 && !__TYPE_IS_PTR(t)); \
35	(__force t)(__TYPE_IS_PTR(t) ? ((v) & 0x7fffffff) : (v)); \
36})
37
38#define PSW32_MASK_USER		0x0000FF00UL
39
40#define PSW32_USER_BITS (PSW32_MASK_DAT | PSW32_MASK_IO | PSW32_MASK_EXT | \
41			 PSW32_DEFAULT_KEY | PSW32_MASK_BASE | \
42			 PSW32_MASK_MCHECK | PSW32_MASK_PSTATE | \
43			 PSW32_ASC_PRIMARY)
44
45#define COMPAT_UTS_MACHINE	"s390\0\0\0\0"
46
47typedef u16		compat_nlink_t;
48
49typedef struct {
50	u32 mask;
51	u32 addr;
52} __aligned(8) psw_compat_t;
53
54typedef struct {
55	psw_compat_t psw;
56	u32 gprs[NUM_GPRS];
57	u32 acrs[NUM_ACRS];
58	u32 orig_gpr2;
59} s390_compat_regs;
60
61typedef struct {
62	u32 gprs_high[NUM_GPRS];
63} s390_compat_regs_high;
64
65struct compat_stat {
66	compat_dev_t	st_dev;
67	u16		__pad1;
68	compat_ino_t	st_ino;
69	compat_mode_t	st_mode;
70	compat_nlink_t	st_nlink;
71	__compat_uid_t	st_uid;
72	__compat_gid_t	st_gid;
73	compat_dev_t	st_rdev;
74	u16		__pad2;
75	u32		st_size;
76	u32		st_blksize;
77	u32		st_blocks;
78	u32		st_atime;
79	u32		st_atime_nsec;
80	u32		st_mtime;
81	u32		st_mtime_nsec;
82	u32		st_ctime;
83	u32		st_ctime_nsec;
84	u32		__unused4;
85	u32		__unused5;
86};
87
88struct compat_statfs {
89	u32		f_type;
90	u32		f_bsize;
91	u32		f_blocks;
92	u32		f_bfree;
93	u32		f_bavail;
94	u32		f_files;
95	u32		f_ffree;
96	compat_fsid_t	f_fsid;
97	u32		f_namelen;
98	u32		f_frsize;
99	u32		f_flags;
100	u32		f_spare[4];
101};
102
103struct compat_statfs64 {
104	u32		f_type;
105	u32		f_bsize;
106	u64		f_blocks;
107	u64		f_bfree;
108	u64		f_bavail;
109	u64		f_files;
110	u64		f_ffree;
111	compat_fsid_t	f_fsid;
112	u32		f_namelen;
113	u32		f_frsize;
114	u32		f_flags;
115	u32		f_spare[5];
116};
117
118/*
119 * A pointer passed in from user mode. This should not
120 * be used for syscall parameters, just declare them
121 * as pointers because the syscall entry code will have
122 * appropriately converted them already.
123 */
124
125static inline void __user *compat_ptr(compat_uptr_t uptr)
126{
127	return (void __user *)(unsigned long)(uptr & 0x7fffffffUL);
128}
129#define compat_ptr(uptr) compat_ptr(uptr)
130
131#ifdef CONFIG_COMPAT
132
133static inline int is_compat_task(void)
134{
135	return test_thread_flag(TIF_31BIT);
136}
137
138#endif
139
140#endif /* _ASM_S390X_COMPAT_H */
141