4 #include <linux/types.h>
5 #include <asm/ptrace.h>
9 * NULL is theoretically a valid place to put the bounds
10 * directory, so point this at an invalid address.
12 #define MPX_INVALID_BOUNDS_DIR ((void __user *)-1)
13 #define MPX_BNDCFG_ENABLE_FLAG 0x1
14 #define MPX_BD_ENTRY_VALID_FLAG 0x1
18 /* upper 28 bits [47:20] of the virtual address in 64-bit used to
19 * index into bounds directory (BD).
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
26 #define MPX_BT_ENTRY_OFFSET 17
27 #define MPX_BT_ENTRY_SHIFT 5
28 #define MPX_IGN_BITS 3
29 #define MPX_BD_ENTRY_TAIL 3
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
38 #define MPX_BD_ENTRY_TAIL 2
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))
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))
51 #define MPX_BNDCFG_ADDR_MASK (~((1UL<<MPX_BNDCFG_TAIL)-1))
52 #define MPX_BNDSTA_ERROR_CODE 0x3
54 #ifdef CONFIG_X86_INTEL_MPX
55 siginfo_t
*mpx_generate_siginfo(struct pt_regs
*regs
,
56 struct xsave_struct
*xsave_buf
);
57 int mpx_handle_bd_fault(struct xsave_struct
*xsave_buf
);
58 static inline int kernel_managing_mpx_tables(struct mm_struct
*mm
)
60 return (mm
->bd_addr
!= MPX_INVALID_BOUNDS_DIR
);
62 static inline void mpx_mm_init(struct mm_struct
*mm
)
65 * NULL is theoretically a valid place to put the bounds
66 * directory, so point this at an invalid address.
68 mm
->bd_addr
= MPX_INVALID_BOUNDS_DIR
;
71 static inline siginfo_t
*mpx_generate_siginfo(struct pt_regs
*regs
,
72 struct xsave_struct
*xsave_buf
)
76 static inline int mpx_handle_bd_fault(struct xsave_struct
*xsave_buf
)
80 static inline int kernel_managing_mpx_tables(struct mm_struct
*mm
)
84 static inline void mpx_mm_init(struct mm_struct
*mm
)
87 #endif /* CONFIG_X86_INTEL_MPX */
89 #endif /* _ASM_X86_MPX_H */
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