| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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 <linux/pkeys.h> |
| 17 | #include <asm/cpu_has_feature.h> |
| 18 | |
| 19 | /* |
| 20 | * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits() |
| 21 | * here. How important is the optimization? |
| 22 | */ |
| 23 | static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot, |
| 24 | unsigned long pkey) |
| 25 | { |
| 26 | #ifdef CONFIG_PPC_MEM_KEYS |
| 27 | return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey)); |
| 28 | #else |
| 29 | return ((prot & PROT_SAO) ? VM_SAO : 0); |
| 30 | #endif |
| 31 | } |
| 32 | #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey) |
| 33 | |
| 34 | static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags) |
| 35 | { |
| 36 | #ifdef CONFIG_PPC_MEM_KEYS |
| 37 | return (vm_flags & VM_SAO) ? |
| 38 | __pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) : |
| 39 | __pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags)); |
| 40 | #else |
| 41 | return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0); |
| 42 | #endif |
| 43 | } |
| 44 | #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags) |
| 45 | |
| 46 | static inline bool arch_validate_prot(unsigned long prot, unsigned long addr) |
| 47 | { |
| 48 | if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO)) |
| 49 | return false; |
| 50 | if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO)) |
| 51 | return false; |
| 52 | return true; |
| 53 | } |
| 54 | #define arch_validate_prot arch_validate_prot |
| 55 | |
| 56 | #endif /* CONFIG_PPC64 */ |
| 57 | #endif /* _ASM_POWERPC_MMAN_H */ |