#ifndef _ASM_X86_MPX_H #define _ASM_X86_MPX_H #include #include #include /* * 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 #ifdef CONFIG_X86_64 /* upper 28 bits [47:20] of the virtual address in 64-bit used to * index into bounds directory (BD). */ #define MPX_BD_ENTRY_OFFSET 28 #define MPX_BD_ENTRY_SHIFT 3 /* bits [19:3] of the virtual address in 64-bit used to index into * bounds table (BT). */ #define MPX_BT_ENTRY_OFFSET 17 #define MPX_BT_ENTRY_SHIFT 5 #define MPX_IGN_BITS 3 #define MPX_BD_ENTRY_TAIL 3 #else #define MPX_BD_ENTRY_OFFSET 20 #define MPX_BD_ENTRY_SHIFT 2 #define MPX_BT_ENTRY_OFFSET 10 #define MPX_BT_ENTRY_SHIFT 4 #define MPX_IGN_BITS 2 #define MPX_BD_ENTRY_TAIL 2 #endif #define MPX_BD_SIZE_BYTES (1UL<<(MPX_BD_ENTRY_OFFSET+MPX_BD_ENTRY_SHIFT)) #define MPX_BT_SIZE_BYTES (1UL<<(MPX_BT_ENTRY_OFFSET+MPX_BT_ENTRY_SHIFT)) #define MPX_BNDSTA_TAIL 2 #define MPX_BNDCFG_TAIL 12 #define MPX_BNDSTA_ADDR_MASK (~((1UL<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->bd_addr = MPX_INVALID_BOUNDS_DIR; } #else static inline siginfo_t *mpx_generate_siginfo(struct pt_regs *regs, struct xsave_struct *xsave_buf) { return NULL; } static inline int mpx_handle_bd_fault(struct xsave_struct *xsave_buf) { 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) { } #endif /* CONFIG_X86_INTEL_MPX */ #endif /* _ASM_X86_MPX_H */