x86/pkeys: Add arch_pkeys_enabled()



This will be used in future patches to check for arch support for
pkeys in generic code.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Dave Hansen <dave.hansen@intel.com>

parent 555934a7

arch/x86/include/asm/pkeys.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,11 @@
		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.