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