arch/powerpc/include/asm/mman.h

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public License
   4  * as published by the Free Software Foundation; either version
   5  * 2 of the License, or (at your option) any later version.
   6  */
   7 #ifndef _ASM_POWERPC_MMAN_H
   8 #define _ASM_POWERPC_MMAN_H
   9
  10 #include <uapi/asm/mman.h>
  11
  12 #ifdef CONFIG_PPC64
  13
  14 #include <asm/cputable.h>
  15 #include <linux/mm.h>
  16 #include <asm/cpu_has_feature.h>
  17
  18 /*
  19  * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
  20  * here.  How important is the optimization?
  21  */
  22 static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
  23                 unsigned long pkey)
  24 {
  25         return (prot & PROT_SAO) ? VM_SAO : 0;
  26 }
  27 #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
  28
  29 static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
  30 {
  31         return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
  32 }
  33 #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
  34
  35 static inline bool arch_validate_prot(unsigned long prot)
  36 {
  37         if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
  38                 return false;
  39         if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
  40                 return false;
  41         return true;
  42 }
  43 #define arch_validate_prot(prot) arch_validate_prot(prot)
  44
  45 #endif /* CONFIG_PPC64 */
  46 #endif  /* _ASM_POWERPC_MMAN_H */