| #ifndef _ASM_X86_MPX_H |
| #define _ASM_X86_MPX_H |
| |
| #include <linux/types.h> |
| #include <linux/mm_types.h> |
| |
| #include <asm/ptrace.h> |
| #include <asm/insn.h> |
| |
| /* |
| * NULL is theoretically a valid place to put the bounds |
| * directory, so point this at an invalid address. |
| */ |
| #define MPX_INVALID_BOUNDS_DIR ((void __user *)-1) |
| #define MPX_BNDCFG_ENABLE_FLAG 0x1 |
| #define MPX_BD_ENTRY_VALID_FLAG 0x1 |
| |
| /* |
| * The upper 28 bits [47:20] of the virtual address in 64-bit |
| * are used to index into bounds directory (BD). |
| * |
| * The directory is 2G (2^31) in size, and with 8-byte entries |
| * it has 2^28 entries. |
| */ |
| #define MPX_BD_SIZE_BYTES_64 (1UL<<31) |
| #define MPX_BD_ENTRY_BYTES_64 8 |
| #define MPX_BD_NR_ENTRIES_64 (MPX_BD_SIZE_BYTES_64/MPX_BD_ENTRY_BYTES_64) |
| |
| /* |
| * The 32-bit directory is 4MB (2^22) in size, and with 4-byte |
| * entries it has 2^20 entries. |
| */ |
| #define MPX_BD_SIZE_BYTES_32 (1UL<<22) |
| #define MPX_BD_ENTRY_BYTES_32 4 |
| #define MPX_BD_NR_ENTRIES_32 (MPX_BD_SIZE_BYTES_32/MPX_BD_ENTRY_BYTES_32) |
| |
| /* |
| * A 64-bit table is 4MB total in size, and an entry is |
| * 4 64-bit pointers in size. |
| */ |
| #define MPX_BT_SIZE_BYTES_64 (1UL<<22) |
| #define MPX_BT_ENTRY_BYTES_64 32 |
| #define MPX_BT_NR_ENTRIES_64 (MPX_BT_SIZE_BYTES_64/MPX_BT_ENTRY_BYTES_64) |
| |
| /* |
| * A 32-bit table is 16kB total in size, and an entry is |
| * 4 32-bit pointers in size. |
| */ |
| #define MPX_BT_SIZE_BYTES_32 (1UL<<14) |
| #define MPX_BT_ENTRY_BYTES_32 16 |
| #define MPX_BT_NR_ENTRIES_32 (MPX_BT_SIZE_BYTES_32/MPX_BT_ENTRY_BYTES_32) |
| |
| #define MPX_BNDSTA_TAIL 2 |
| #define MPX_BNDCFG_TAIL 12 |
| #define MPX_BNDSTA_ADDR_MASK (~((1UL<<MPX_BNDSTA_TAIL)-1)) |
| #define MPX_BNDCFG_ADDR_MASK (~((1UL<<MPX_BNDCFG_TAIL)-1)) |
| #define MPX_BNDSTA_ERROR_CODE 0x3 |
| |
| #ifdef CONFIG_X86_INTEL_MPX |
| siginfo_t *mpx_generate_siginfo(struct pt_regs *regs); |
| int mpx_handle_bd_fault(void); |
| static inline int kernel_managing_mpx_tables(struct mm_struct *mm) |
| { |
| return (mm->context.bd_addr != MPX_INVALID_BOUNDS_DIR); |
| } |
| static inline void mpx_mm_init(struct mm_struct *mm) |
| { |
| /* |
| * NULL is theoretically a valid place to put the bounds |
| * directory, so point this at an invalid address. |
| */ |
| mm->context.bd_addr = MPX_INVALID_BOUNDS_DIR; |
| } |
| void mpx_notify_unmap(struct mm_struct *mm, struct vm_area_struct *vma, |
| unsigned long start, unsigned long end); |
| #else |
| static inline siginfo_t *mpx_generate_siginfo(struct pt_regs *regs) |
| { |
| return NULL; |
| } |
| static inline int mpx_handle_bd_fault(void) |
| { |
| return -EINVAL; |
| } |
| static inline int kernel_managing_mpx_tables(struct mm_struct *mm) |
| { |
| return 0; |
| } |
| static inline void mpx_mm_init(struct mm_struct *mm) |
| { |
| } |
| static inline void mpx_notify_unmap(struct mm_struct *mm, |
| struct vm_area_struct *vma, |
| unsigned long start, unsigned long end) |
| { |
| } |
| #endif /* CONFIG_X86_INTEL_MPX */ |
| |
| #endif /* _ASM_X86_MPX_H */ |