[PATCH 6/8] x86/pkeys: Add arch_pkeys_enabled()
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2018-05-08 15:00:05
Also in:
linux-mm, lkml
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
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> --- arch/x86/include/asm/pkeys.h | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/x86/include/asm/pkeys.h b/arch/x86/include/asm/pkeys.h
index 0e5f749158e4..c1957f8f7c1b 100644
--- a/arch/x86/include/asm/pkeys.h
+++ b/arch/x86/include/asm/pkeys.h@@ -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.
--
2.14.1