arch/powerpc/include/asm/mman.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  */
   4 #ifndef _ASM_POWERPC_MMAN_H
   5 #define _ASM_POWERPC_MMAN_H
   6
   7 #include <uapi/asm/mman.h>
   8
   9 #if defined(CONFIG_PPC64) && !defined(BUILD_VDSO)
  10
  11 #include <asm/cputable.h>
  12 #include <linux/mm.h>
  13 #include <linux/pkeys.h>
  14 #include <asm/cpu_has_feature.h>
  15 #include <asm/firmware.h>
  16
  17 static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
  18                 unsigned long pkey)
  19 {
  20 #ifdef CONFIG_PPC_MEM_KEYS
  21         return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
  22 #else
  23         return ((prot & PROT_SAO) ? VM_SAO : 0);
  24 #endif
  25 }
  26 #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
  27
  28 static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
  29 {
  30         if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
  31                 return false;
  32         if (prot & PROT_SAO) {
  33                 if (!cpu_has_feature(CPU_FTR_SAO))
  34                         return false;
  35                 if (firmware_has_feature(FW_FEATURE_LPAR) &&
  36                     !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR))
  37                         return false;
  38         }
  39         return true;
  40 }
  41 #define arch_validate_prot arch_validate_prot
  42
  43 #endif /* CONFIG_PPC64 */
  44 #endif  /* _ASM_POWERPC_MMAN_H */