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Linux/arch/x86/include/uapi/asm/mman.h

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  1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2 #ifndef _ASM_X86_MMAN_H
  3 #define _ASM_X86_MMAN_H
  4 
  5 #define MAP_32BIT       0x40            /* only give out 32bit addresses */
  6 
  7 #ifdef CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS
  8 /*
  9  * Take the 4 protection key bits out of the vma->vm_flags
 10  * value and turn them in to the bits that we can put in
 11  * to a pte.
 12  *
 13  * Only override these if Protection Keys are available
 14  * (which is only on 64-bit).
 15  */
 16 #define arch_vm_get_page_prot(vm_flags) __pgprot(       \
 17                 ((vm_flags) & VM_PKEY_BIT0 ? _PAGE_PKEY_BIT0 : 0) |     \
 18                 ((vm_flags) & VM_PKEY_BIT1 ? _PAGE_PKEY_BIT1 : 0) |     \
 19                 ((vm_flags) & VM_PKEY_BIT2 ? _PAGE_PKEY_BIT2 : 0) |     \
 20                 ((vm_flags) & VM_PKEY_BIT3 ? _PAGE_PKEY_BIT3 : 0))
 21 
 22 #define arch_calc_vm_prot_bits(prot, key) (             \
 23                 ((key) & 0x1 ? VM_PKEY_BIT0 : 0) |      \
 24                 ((key) & 0x2 ? VM_PKEY_BIT1 : 0) |      \
 25                 ((key) & 0x4 ? VM_PKEY_BIT2 : 0) |      \
 26                 ((key) & 0x8 ? VM_PKEY_BIT3 : 0))
 27 #endif
 28 
 29 #include <asm-generic/mman.h>
 30 
 31 #endif /* _ASM_X86_MMAN_H */
 32 

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