LXR linux/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#ifdef CONFIG_PPC64
  10
  11#include <asm/cputable.h>
  12#include <linux/mm.h>
  13#include <linux/pkeys.h>
  14#include <asm/cpu_has_feature.h>
  15
  16static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
  17                unsigned long pkey)
  18{
  19#ifdef CONFIG_PPC_MEM_KEYS
  20        return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
  21#else
  22        return ((prot & PROT_SAO) ? VM_SAO : 0);
  23#endif
  24}
  25#define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
  26
  27static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
  28{
  29#ifdef CONFIG_PPC_MEM_KEYS
  30        return (vm_flags & VM_SAO) ?
  31                __pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
  32                __pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
  33#else
  34        return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
  35#endif
  36}
  37#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
  38
  39static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
  40{
  41        if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
  42                return false;
  43        if (prot & PROT_SAO) {
  44                if (!cpu_has_feature(CPU_FTR_SAO))
  45                        return false;
  46                if (firmware_has_feature(FW_FEATURE_LPAR) &&
  47                    !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR))
  48                        return false;
  49        }
  50        return true;
  51}
  52#define arch_validate_prot arch_validate_prot
  53
  54#endif /* CONFIG_PPC64 */
  55#endif  /* _ASM_POWERPC_MMAN_H */
  56