Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[linux-2.6-microblaze.git] / arch / powerpc / include / asm / compat.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_COMPAT_H
3 #define _ASM_POWERPC_COMPAT_H
4 #ifdef __KERNEL__
5 /*
6  * Architecture specific compatibility types
7  */
8 #include <linux/types.h>
9 #include <linux/sched.h>
10
11 #include <asm-generic/compat.h>
12
13 #define COMPAT_USER_HZ          100
14 #ifdef __BIG_ENDIAN__
15 #define COMPAT_UTS_MACHINE      "ppc\0\0"
16 #else
17 #define COMPAT_UTS_MACHINE      "ppcle\0\0"
18 #endif
19
20 typedef u32             __compat_uid_t;
21 typedef u32             __compat_gid_t;
22 typedef u32             __compat_uid32_t;
23 typedef u32             __compat_gid32_t;
24 typedef u32             compat_mode_t;
25 typedef u32             compat_dev_t;
26 typedef s16             compat_nlink_t;
27 typedef u16             compat_ipc_pid_t;
28 typedef u32             compat_caddr_t;
29 typedef __kernel_fsid_t compat_fsid_t;
30
31 struct compat_stat {
32         compat_dev_t    st_dev;
33         compat_ino_t    st_ino;
34         compat_mode_t   st_mode;
35         compat_nlink_t  st_nlink;
36         __compat_uid32_t        st_uid;
37         __compat_gid32_t        st_gid;
38         compat_dev_t    st_rdev;
39         compat_off_t    st_size;
40         compat_off_t    st_blksize;
41         compat_off_t    st_blocks;
42         old_time32_t    st_atime;
43         u32             st_atime_nsec;
44         old_time32_t    st_mtime;
45         u32             st_mtime_nsec;
46         old_time32_t    st_ctime;
47         u32             st_ctime_nsec;
48         u32             __unused4[2];
49 };
50
51 struct compat_flock {
52         short           l_type;
53         short           l_whence;
54         compat_off_t    l_start;
55         compat_off_t    l_len;
56         compat_pid_t    l_pid;
57 };
58
59 #define F_GETLK64       12      /*  using 'struct flock64' */
60 #define F_SETLK64       13
61 #define F_SETLKW64      14
62
63 struct compat_flock64 {
64         short           l_type;
65         short           l_whence;
66         compat_loff_t   l_start;
67         compat_loff_t   l_len;
68         compat_pid_t    l_pid;
69 };
70
71 struct compat_statfs {
72         int             f_type;
73         int             f_bsize;
74         int             f_blocks;
75         int             f_bfree;
76         int             f_bavail;
77         int             f_files;
78         int             f_ffree;
79         compat_fsid_t   f_fsid;
80         int             f_namelen;      /* SunOS ignores this field. */
81         int             f_frsize;
82         int             f_flags;
83         int             f_spare[4];
84 };
85
86 #define COMPAT_RLIM_INFINITY            0xffffffff
87
88 typedef u32             compat_old_sigset_t;
89
90 #define _COMPAT_NSIG            64
91 #define _COMPAT_NSIG_BPW        32
92
93 typedef u32             compat_sigset_word;
94
95 #define COMPAT_OFF_T_MAX        0x7fffffff
96
97 static inline void __user *arch_compat_alloc_user_space(long len)
98 {
99         struct pt_regs *regs = current->thread.regs;
100         unsigned long usp = regs->gpr[1];
101
102         /*
103          * We can't access below the stack pointer in the 32bit ABI and
104          * can access 288 bytes in the 64bit big-endian ABI,
105          * or 512 bytes with the new ELFv2 little-endian ABI.
106          */
107         if (!is_32bit_task())
108                 usp -= USER_REDZONE_SIZE;
109
110         return (void __user *) (usp - len);
111 }
112
113 /*
114  * ipc64_perm is actually 32/64bit clean but since the compat layer refers to
115  * it we may as well define it.
116  */
117 struct compat_ipc64_perm {
118         compat_key_t key;
119         __compat_uid_t uid;
120         __compat_gid_t gid;
121         __compat_uid_t cuid;
122         __compat_gid_t cgid;
123         compat_mode_t mode;
124         unsigned int seq;
125         unsigned int __pad2;
126         unsigned long __unused1;        /* yes they really are 64bit pads */
127         unsigned long __unused2;
128 };
129
130 struct compat_semid64_ds {
131         struct compat_ipc64_perm sem_perm;
132         unsigned int sem_otime_high;
133         unsigned int sem_otime;
134         unsigned int sem_ctime_high;
135         unsigned int sem_ctime;
136         compat_ulong_t sem_nsems;
137         compat_ulong_t __unused3;
138         compat_ulong_t __unused4;
139 };
140
141 struct compat_msqid64_ds {
142         struct compat_ipc64_perm msg_perm;
143         unsigned int msg_stime_high;
144         unsigned int msg_stime;
145         unsigned int msg_rtime_high;
146         unsigned int msg_rtime;
147         unsigned int msg_ctime_high;
148         unsigned int msg_ctime;
149         compat_ulong_t msg_cbytes;
150         compat_ulong_t msg_qnum;
151         compat_ulong_t msg_qbytes;
152         compat_pid_t msg_lspid;
153         compat_pid_t msg_lrpid;
154         compat_ulong_t __unused4;
155         compat_ulong_t __unused5;
156 };
157
158 struct compat_shmid64_ds {
159         struct compat_ipc64_perm shm_perm;
160         unsigned int shm_atime_high;
161         unsigned int shm_atime;
162         unsigned int shm_dtime_high;
163         unsigned int shm_dtime;
164         unsigned int shm_ctime_high;
165         unsigned int shm_ctime;
166         unsigned int __unused4;
167         compat_size_t shm_segsz;
168         compat_pid_t shm_cpid;
169         compat_pid_t shm_lpid;
170         compat_ulong_t shm_nattch;
171         compat_ulong_t __unused5;
172         compat_ulong_t __unused6;
173 };
174
175 static inline int is_compat_task(void)
176 {
177         return is_32bit_task();
178 }
179
180 #endif /* __KERNEL__ */
181 #endif /* _ASM_POWERPC_COMPAT_H */