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.
7 #ifndef _ASM_POWERPC_MMAN_H
8 #define _ASM_POWERPC_MMAN_H
10 #include <uapi/asm/mman.h>
14 #include <asm/cputable.h>
16 #include <linux/pkeys.h>
17 #include <asm/cpu_has_feature.h>
20 * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
21 * here. How important is the optimization?
23 static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
26 #ifdef CONFIG_PPC_MEM_KEYS
27 return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
29 return ((prot & PROT_SAO) ? VM_SAO : 0);
32 #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
34 static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
36 #ifdef CONFIG_PPC_MEM_KEYS
37 return (vm_flags & VM_SAO) ?
38 __pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
39 __pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
41 return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
44 #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
46 static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
48 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
50 if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
54 #define arch_validate_prot arch_validate_prot
56 #endif /* CONFIG_PPC64 */
57 #endif /* _ASM_POWERPC_MMAN_H */