x86/fpu, crypto x86/cast6_avx: Simplify the cast6_init() xfeature checks
authorIngo Molnar <mingo@kernel.org>
Tue, 28 Apr 2015 08:11:24 +0000 (10:11 +0200)
committerIngo Molnar <mingo@kernel.org>
Tue, 19 May 2015 13:47:58 +0000 (15:47 +0200)
commit1debf7db2b9e156ecd69830244285b854e85a71c
tree6314e27334495a026bb4aeb8d550ec67bb05f1d1
parentc93b8a3963242e034a4d1ec87090c62bb25a575c
x86/fpu, crypto x86/cast6_avx: Simplify the cast6_init() xfeature checks

Use the new 'cpu_has_xfeatures()' function to query AVX CPU support.

This has the following advantages to the driver:

 - Decouples the driver from FPU internals: it's now only using <asm/fpu/api.h>.

 - Removes detection complexity from the driver, no more raw XGETBV instruction

 - Shrinks the code a bit.

 - Standardizes feature name error message printouts across drivers

There are also advantages to the x86 FPU code: once all drivers
are decoupled from internals we can move them out of common
headers and we'll also be able to remove xcr.h.

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>
arch/x86/crypto/cast6_avx_glue.c