1. 02 Sep, 2009 1 commit
    • Huang Ying's avatar
      x86: Move kernel_fpu_using to irq_fpu_usable in asm/i387.h · ae4b688d
      Huang Ying authored
      This function measures whether the FPU/SSE state can be touched in
      interrupt context. If the interrupted code is in user space or has no
      valid FPU/SSE context (CR0.TS == 1), FPU/SSE state can be used in IRQ
      or soft_irq context too.
      
      This is used by AES-NI accelerated AES implementation and PCLMULQDQ
      accelerated GHASH implementation.
      
      v3:
       - Renamed to irq_fpu_usable to reflect the purpose of the function.
      
      v2:
       - Renamed to irq_is_fpu_using to reflect the real situation.
      Signed-off-by: default avatarHuang Ying <ying.huang@intel.com>
      CC: H. Peter Anvin <hpa@zytor.com>
      Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
      ae4b688d
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