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 16 /* 17 * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits() 18 * here. How important is the optimization? 19 */ 20 static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, 21 unsigned long pkey) 22 { 23 #ifdef CONFIG_PPC_MEM_KEYS 24 return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey)); 25 #else 26 return ((prot & PROT_SAO) ? VM_SAO : 0); 27 #endif 28 } 29 #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) 30 31 static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags) 32 { 33 #ifdef CONFIG_PPC_MEM_KEYS 34 return (vm_flags & VM_SAO) ? 35 __pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) : 36 __pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags)); 37 #else 38 return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0); 39 #endif 40 } 41 #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags) 42 43 static inline bool arch_validate_prot(unsigned long prot, unsigned long addr) 44 { 45 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO)) 46 return false; 47 if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO)) 48 return false; 49 return true; 50 } 51 #define arch_validate_prot arch_validate_prot 52 53 #endif /* CONFIG_PPC64 */ 54 #endif /* _ASM_POWERPC_MMAN_H */ 55