mirror of https://gitee.com/openkylin/linux.git
42 lines
1.1 KiB
C
42 lines
1.1 KiB
C
#ifndef _ASM_X86_PKEYS_H
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#define _ASM_X86_PKEYS_H
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#define PKEY_DEDICATED_EXECUTE_ONLY 15
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/*
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* Consider the PKEY_DEDICATED_EXECUTE_ONLY key unavailable.
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*/
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#define arch_max_pkey() (boot_cpu_has(X86_FEATURE_OSPKE) ? \
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PKEY_DEDICATED_EXECUTE_ONLY : 1)
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extern int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
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unsigned long init_val);
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/*
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* Try to dedicate one of the protection keys to be used as an
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* execute-only protection key.
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*/
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extern int __execute_only_pkey(struct mm_struct *mm);
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static inline int execute_only_pkey(struct mm_struct *mm)
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{
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if (!boot_cpu_has(X86_FEATURE_OSPKE))
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return 0;
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return __execute_only_pkey(mm);
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}
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extern int __arch_override_mprotect_pkey(struct vm_area_struct *vma,
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int prot, int pkey);
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static inline int arch_override_mprotect_pkey(struct vm_area_struct *vma,
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int prot, int pkey)
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{
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if (!boot_cpu_has(X86_FEATURE_OSPKE))
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return 0;
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return __arch_override_mprotect_pkey(vma, prot, pkey);
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}
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extern int __arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
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unsigned long init_val);
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#endif /*_ASM_X86_PKEYS_H */
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