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1 | #ifndef _ASM_X86_MPX_H |
2 | #define _ASM_X86_MPX_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | #include <asm/ptrace.h> | |
fcc7ffd6 | 6 | #include <asm/insn.h> |
57319d80 | 7 | |
fe3d197f DH |
8 | /* |
9 | * NULL is theoretically a valid place to put the bounds | |
10 | * directory, so point this at an invalid address. | |
11 | */ | |
12 | #define MPX_INVALID_BOUNDS_DIR ((void __user *)-1) | |
13 | #define MPX_BNDCFG_ENABLE_FLAG 0x1 | |
14 | #define MPX_BD_ENTRY_VALID_FLAG 0x1 | |
15 | ||
57319d80 QR |
16 | #ifdef CONFIG_X86_64 |
17 | ||
18 | /* upper 28 bits [47:20] of the virtual address in 64-bit used to | |
19 | * index into bounds directory (BD). | |
20 | */ | |
21 | #define MPX_BD_ENTRY_OFFSET 28 | |
22 | #define MPX_BD_ENTRY_SHIFT 3 | |
23 | /* bits [19:3] of the virtual address in 64-bit used to index into | |
24 | * bounds table (BT). | |
25 | */ | |
26 | #define MPX_BT_ENTRY_OFFSET 17 | |
27 | #define MPX_BT_ENTRY_SHIFT 5 | |
28 | #define MPX_IGN_BITS 3 | |
fe3d197f | 29 | #define MPX_BD_ENTRY_TAIL 3 |
57319d80 QR |
30 | |
31 | #else | |
32 | ||
33 | #define MPX_BD_ENTRY_OFFSET 20 | |
34 | #define MPX_BD_ENTRY_SHIFT 2 | |
35 | #define MPX_BT_ENTRY_OFFSET 10 | |
36 | #define MPX_BT_ENTRY_SHIFT 4 | |
37 | #define MPX_IGN_BITS 2 | |
fe3d197f | 38 | #define MPX_BD_ENTRY_TAIL 2 |
57319d80 QR |
39 | |
40 | #endif | |
41 | ||
42 | #define MPX_BD_SIZE_BYTES (1UL<<(MPX_BD_ENTRY_OFFSET+MPX_BD_ENTRY_SHIFT)) | |
43 | #define MPX_BT_SIZE_BYTES (1UL<<(MPX_BT_ENTRY_OFFSET+MPX_BT_ENTRY_SHIFT)) | |
44 | ||
fe3d197f DH |
45 | #define MPX_BNDSTA_TAIL 2 |
46 | #define MPX_BNDCFG_TAIL 12 | |
47 | #define MPX_BNDSTA_ADDR_MASK (~((1UL<<MPX_BNDSTA_TAIL)-1)) | |
48 | #define MPX_BNDCFG_ADDR_MASK (~((1UL<<MPX_BNDCFG_TAIL)-1)) | |
49 | #define MPX_BT_ADDR_MASK (~((1UL<<MPX_BD_ENTRY_TAIL)-1)) | |
50 | ||
51 | #define MPX_BNDCFG_ADDR_MASK (~((1UL<<MPX_BNDCFG_TAIL)-1)) | |
57319d80 QR |
52 | #define MPX_BNDSTA_ERROR_CODE 0x3 |
53 | ||
1de4fa14 DH |
54 | #define MPX_BD_ENTRY_MASK ((1<<MPX_BD_ENTRY_OFFSET)-1) |
55 | #define MPX_BT_ENTRY_MASK ((1<<MPX_BT_ENTRY_OFFSET)-1) | |
56 | #define MPX_GET_BD_ENTRY_OFFSET(addr) ((((addr)>>(MPX_BT_ENTRY_OFFSET+ \ | |
57 | MPX_IGN_BITS)) & MPX_BD_ENTRY_MASK) << MPX_BD_ENTRY_SHIFT) | |
58 | #define MPX_GET_BT_ENTRY_OFFSET(addr) ((((addr)>>MPX_IGN_BITS) & \ | |
59 | MPX_BT_ENTRY_MASK) << MPX_BT_ENTRY_SHIFT) | |
60 | ||
fcc7ffd6 DH |
61 | #ifdef CONFIG_X86_INTEL_MPX |
62 | siginfo_t *mpx_generate_siginfo(struct pt_regs *regs, | |
63 | struct xsave_struct *xsave_buf); | |
fe3d197f DH |
64 | int mpx_handle_bd_fault(struct xsave_struct *xsave_buf); |
65 | static inline int kernel_managing_mpx_tables(struct mm_struct *mm) | |
66 | { | |
67 | return (mm->bd_addr != MPX_INVALID_BOUNDS_DIR); | |
68 | } | |
69 | static inline void mpx_mm_init(struct mm_struct *mm) | |
70 | { | |
71 | /* | |
72 | * NULL is theoretically a valid place to put the bounds | |
73 | * directory, so point this at an invalid address. | |
74 | */ | |
75 | mm->bd_addr = MPX_INVALID_BOUNDS_DIR; | |
76 | } | |
1de4fa14 DH |
77 | void mpx_notify_unmap(struct mm_struct *mm, struct vm_area_struct *vma, |
78 | unsigned long start, unsigned long end); | |
fcc7ffd6 DH |
79 | #else |
80 | static inline siginfo_t *mpx_generate_siginfo(struct pt_regs *regs, | |
81 | struct xsave_struct *xsave_buf) | |
82 | { | |
83 | return NULL; | |
84 | } | |
fe3d197f DH |
85 | static inline int mpx_handle_bd_fault(struct xsave_struct *xsave_buf) |
86 | { | |
87 | return -EINVAL; | |
88 | } | |
89 | static inline int kernel_managing_mpx_tables(struct mm_struct *mm) | |
90 | { | |
91 | return 0; | |
92 | } | |
93 | static inline void mpx_mm_init(struct mm_struct *mm) | |
94 | { | |
95 | } | |
1de4fa14 DH |
96 | static inline void mpx_notify_unmap(struct mm_struct *mm, |
97 | struct vm_area_struct *vma, | |
98 | unsigned long start, unsigned long end) | |
99 | { | |
100 | } | |
fcc7ffd6 DH |
101 | #endif /* CONFIG_X86_INTEL_MPX */ |
102 | ||
57319d80 | 103 | #endif /* _ASM_X86_MPX_H */ |