x86: Move kernel_fpu_using to irq_fpu_usable in asm/i387.h

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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: Huang Ying <ying.huang@intel.com>
CC: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Huang Ying 2009-08-31 13:11:54 +08:00 • committed by H. Peter Anvin

parent f6909f394c

commit ae4b688db2

2 changed files with 13 additions and 12 deletions

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17

arch/x86/crypto/aesni-intel_glue.c

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8

arch/x86/include/asm/i387.h

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