| /* |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #ifndef _ASM_POWERPC_MMAN_H |
| #define _ASM_POWERPC_MMAN_H |
| |
| #include <uapi/asm/mman.h> |
| |
| #ifdef CONFIG_PPC64 |
| |
| #include <asm/cputable.h> |
| #include <linux/mm.h> |
| #include <asm/cpu_has_feature.h> |
| |
| /* |
| * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits() |
| * here. How important is the optimization? |
| */ |
| static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, |
| unsigned long pkey) |
| { |
| return (prot & PROT_SAO) ? VM_SAO : 0; |
| } |
| #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) |
| |
| static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags) |
| { |
| return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0); |
| } |
| #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags) |
| |
| static inline bool arch_validate_prot(unsigned long prot) |
| { |
| if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO)) |
| return false; |
| if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO)) |
| return false; |
| return true; |
| } |
| #define arch_validate_prot(prot) arch_validate_prot(prot) |
| |
| #endif /* CONFIG_PPC64 */ |
| #endif /* _ASM_POWERPC_MMAN_H */ |
