• Ingo Molnar's avatar
    x86/fpu, crypto x86/camellia_aesni_avx2: Simplify the camellia_aesni_init() xfeature checks · 7bc371fa
    Ingo Molnar authored
    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: default avatarIngo Molnar <mingo@kernel.org>
    7bc371fa
camellia_aesni_avx2_glue.c 16.9 KB