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 arch_calc_vm_prot_bits(unsigned long prot,unsigned long pkey)16 static 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 arch_vm_get_page_prot(unsigned long vm_flags)27 static 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 arch_validate_prot(unsigned long prot,unsigned long addr)39 static 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