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Diffstat (limited to 'arch/x86/include/asm/pkeys.h')
-rw-r--r--arch/x86/include/asm/pkeys.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pkeys.h b/arch/x86/include/asm/pkeys.h
index 851c04b7a092..19b137f1b3be 100644
--- a/arch/x86/include/asm/pkeys.h
+++ b/arch/x86/include/asm/pkeys.h
@@ -9,6 +9,11 @@
extern int arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
unsigned long init_val);
+static inline bool arch_pkeys_enabled(void)
+{
+ return boot_cpu_has(X86_FEATURE_OSPKE);
+}
+
/*
* Try to dedicate one of the protection keys to be used as an
* execute-only protection key.
@@ -116,4 +121,12 @@ extern int __arch_set_user_pkey_access(struct task_struct *tsk, int pkey,
unsigned long init_val);
extern void copy_init_pkru_to_fpregs(void);
+static inline int vma_pkey(struct vm_area_struct *vma)
+{
+ unsigned long vma_pkey_mask = VM_PKEY_BIT0 | VM_PKEY_BIT1 |
+ VM_PKEY_BIT2 | VM_PKEY_BIT3;
+
+ return (vma->vm_flags & vma_pkey_mask) >> VM_PKEY_SHIFT;
+}
+
#endif /*_ASM_X86_PKEYS_H */