/arch/powerpc/include/asm/mman.h

http://github.com/mirrors/linux · C Header · 54 lines · 40 code · 7 blank · 7 comment · 3 complexity · 67b09ae2bf1078ad6f621e11772d5d89 MD5 · raw file 

    

  1. /* SPDX-License-Identifier: GPL-2.0-or-later */
    2. 

  2. /*
    3. 

  3.  */
    4. 

  4. #ifndef _ASM_POWERPC_MMAN_H
    5. 

  5. #define _ASM_POWERPC_MMAN_H
    6. 

  6. 

  7. #include <uapi/asm/mman.h>
    8. 

  8. 

  9. #ifdef CONFIG_PPC64
    10. 

  10. 

  11. #include <asm/cputable.h>
    12. 

  12. #include <linux/mm.h>
    13. 

  13. #include <linux/pkeys.h>
    14. 

  14. #include <asm/cpu_has_feature.h>
    15. 

  15. 

  16. /*
    17. 

  17.  * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
    18. 

  18.  * here.  How important is the optimization?
    19. 

  19.  */
    20. 

  20. static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
    21. 

  21. 		unsigned long pkey)
    22. 

  22. {
    23. 

  23. #ifdef CONFIG_PPC_MEM_KEYS
    24. 

  24. 	return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
    25. 

  25. #else
    26. 

  26. 	return ((prot & PROT_SAO) ? VM_SAO : 0);
    27. 

  27. #endif
    28. 

  28. }
    29. 

  29. #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
    30. 

  30. 

  31. static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
    32. 

  32. {
    33. 

  33. #ifdef CONFIG_PPC_MEM_KEYS
    34. 

  34. 	return (vm_flags & VM_SAO) ?
    35. 

  35. 		__pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
    36. 

  36. 		__pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
    37. 

  37. #else
    38. 

  38. 	return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
    39. 

  39. #endif
    40. 

  40. }
    41. 

  41. #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
    42. 

  42. 

  43. static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
    44. 

  44. {
    45. 

  45. 	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
    46. 

  46. 		return false;
    47. 

  47. 	if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
    48. 

  48. 		return false;
    49. 

  49. 	return true;
    50. 

  50. }
    51. 

  51. #define arch_validate_prot arch_validate_prot
    52. 

  52. 

  53. #endif /* CONFIG_PPC64 */
    54. 

  54. #endif	/* _ASM_POWERPC_MMAN_H */
    55.