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 <linux/pkeys.h> 17 #include <asm/cpu_has_feature.h> 18 19 /* 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? 22 */ 23 static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, 24 unsigned long pkey) 25 { 26 #ifdef CONFIG_PPC_MEM_KEYS 27 return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey)); 28 #else 29 return ((prot & PROT_SAO) ? VM_SAO : 0); 30 #endif 31 } 32 #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) 33 34 static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags) 35 { 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)); 40 #else 41 return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0); 42 #endif 43 } 44 #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags) 45 46 static inline bool arch_validate_prot(unsigned long prot) 47 { 48 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO)) 49 return false; 50 if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO)) 51 return false; 52 return true; 53 } 54 #define arch_validate_prot(prot) arch_validate_prot(prot) 55 56 #endif /* CONFIG_PPC64 */ 57 #endif /* _ASM_POWERPC_MMAN_H */ 58