1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
| #ifndef _GUARDED_STORAGE_H
| #define _GUARDED_STORAGE_H
|
| #include <linux/types.h>
|
| struct gs_cb {
| __u64 reserved;
| __u64 gsd;
| __u64 gssm;
| __u64 gs_epl_a;
| };
|
| struct gs_epl {
| __u8 pad1;
| union {
| __u8 gs_eam;
| struct {
| __u8 : 6;
| __u8 e : 1;
| __u8 b : 1;
| };
| };
| union {
| __u8 gs_eci;
| struct {
| __u8 tx : 1;
| __u8 cx : 1;
| __u8 : 5;
| __u8 in : 1;
| };
| };
| union {
| __u8 gs_eai;
| struct {
| __u8 : 1;
| __u8 t : 1;
| __u8 as : 2;
| __u8 ar : 4;
| };
| };
| __u32 pad2;
| __u64 gs_eha;
| __u64 gs_eia;
| __u64 gs_eoa;
| __u64 gs_eir;
| __u64 gs_era;
| };
|
| #define GS_ENABLE 0
| #define GS_DISABLE 1
| #define GS_SET_BC_CB 2
| #define GS_CLEAR_BC_CB 3
| #define GS_BROADCAST 4
|
| static inline void load_gs_cb(struct gs_cb *gs_cb)
| {
| asm volatile(".insn rxy,0xe3000000004d,0,%0" : : "Q" (*gs_cb));
| }
|
| static inline void store_gs_cb(struct gs_cb *gs_cb)
| {
| asm volatile(".insn rxy,0xe30000000049,0,%0" : : "Q" (*gs_cb));
| }
|
| static inline void save_gs_cb(struct gs_cb *gs_cb)
| {
| if (gs_cb)
| store_gs_cb(gs_cb);
| }
|
| static inline void restore_gs_cb(struct gs_cb *gs_cb)
| {
| if (gs_cb)
| load_gs_cb(gs_cb);
| }
|
| #endif /* _GUARDED_STORAGE_H */
|
|
