| Dave Hansen | 66d3757 | 2016-02-12 13:02:32 -0800 | [diff] [blame] | 1 | #ifndef _ASM_X86_PKEYS_H |
| 2 | #define _ASM_X86_PKEYS_H |
| 3 | |
| 4 | #define arch_max_pkey() (boot_cpu_has(X86_FEATURE_OSPKE) ? 16 : 1) |
| 5 | |
| Dave Hansen | 8459429 | 2016-02-12 13:02:36 -0800 | [diff] [blame] | 6 | extern int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, |
| 7 | unsigned long init_val); |
| 8 | |
| Dave Hansen | 62b5f7d | 2016-02-12 13:02:40 -0800 | [diff] [blame^] | 9 | /* |
| 10 | * Try to dedicate one of the protection keys to be used as an |
| 11 | * execute-only protection key. |
| 12 | */ |
| 13 | #define PKEY_DEDICATED_EXECUTE_ONLY 15 |
| 14 | extern int __execute_only_pkey(struct mm_struct *mm); |
| 15 | static inline int execute_only_pkey(struct mm_struct *mm) |
| 16 | { |
| 17 | if (!boot_cpu_has(X86_FEATURE_OSPKE)) |
| 18 | return 0; |
| 19 | |
| 20 | return __execute_only_pkey(mm); |
| 21 | } |
| 22 | |
| 23 | extern int __arch_override_mprotect_pkey(struct vm_area_struct *vma, |
| 24 | int prot, int pkey); |
| 25 | static inline int arch_override_mprotect_pkey(struct vm_area_struct *vma, |
| 26 | int prot, int pkey) |
| 27 | { |
| 28 | if (!boot_cpu_has(X86_FEATURE_OSPKE)) |
| 29 | return 0; |
| 30 | |
| 31 | return __arch_override_mprotect_pkey(vma, prot, pkey); |
| 32 | } |
| 33 | |
| Dave Hansen | 66d3757 | 2016-02-12 13:02:32 -0800 | [diff] [blame] | 34 | #endif /*_ASM_X86_PKEYS_H */ |