Ingo Molnar 5b07343034 x86/fpu: Introduce cpu_has_xfeatures(xfeatures_mask, feature_name) ... A lot of FPU using driver code is querying complex CPU features to be able to figure out whether a given set of xstate features is supported by the CPU or not. Introduce a simplified API function that can be used on any CPU type to get this information. Also add an error string return pointer, so that the driver can print a meaningful error message with a standardized feature name. Also mark xfeatures_mask as __read_only. Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>		2015-05-19 15:47:55 +02:00
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asm	x86/fpu: Introduce cpu_has_xfeatures(xfeatures_mask, feature_name)	2015-05-19 15:47:55 +02:00
uapi/asm	x86/fpu: Rename xsave.header::xstate_bv to 'xfeatures'	2015-05-19 15:47:35 +02:00