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 #include <asm/firmware.h> 16 17 static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, 18 unsigned long pkey) 19 { 20 #ifdef CONFIG_PPC_MEM_KEYS 21 return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey)); 22 #else 23 return ((prot & PROT_SAO) ? VM_SAO : 0); 24 #endif 25 } 26 #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) 27 28 static inline bool arch_validate_prot(unsigned long prot, unsigned long addr) 29 { 30 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO)) 31 return false; 32 if (prot & PROT_SAO) { 33 if (!cpu_has_feature(CPU_FTR_SAO)) 34 return false; 35 if (firmware_has_feature(FW_FEATURE_LPAR) && 36 !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR)) 37 return false; 38 } 39 return true; 40 } 41 #define arch_validate_prot arch_validate_prot 42 43 #endif /* CONFIG_PPC64 */ 44 #endif /* _ASM_POWERPC_MMAN_H */ 45