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| author | Michael Ellerman <mpe@ellerman.id.au> | 2018-04-13 23:54:36 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-05-09 11:51:28 +1000 |
| commit | 3f36c94239658a79a4deeb84a2e0ebf005f083fc (patch) | |
| tree | 937ffb0918f11333454e4f9f2e9458580275fa52 /arch/x86/include/asm/pkeys.h | |
| parent | 555934a71bb479ce109722807b374f2d98aefe89 (diff) | |
| download | linux-0-day-3f36c94239658a79a4deeb84a2e0ebf005f083fc.tar.gz linux-0-day-3f36c94239658a79a4deeb84a2e0ebf005f083fc.tar.xz | |
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>
Diffstat (limited to 'arch/x86/include/asm/pkeys.h')
| -rw-r--r-- | arch/x86/include/asm/pkeys.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pkeys.h b/arch/x86/include/asm/pkeys.h index 0e5f749158e45..c1957f8f7c1be 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. |