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| author | Huang Ying <ying.huang@intel.com> | 2009-08-31 13:11:54 +0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-09-01 21:39:15 -0700 |
| commit | ae4b688db2432baad379f73fdcac13ec24f603d5 (patch) | |
| tree | e367ad761a6835fffeb25694f3308e9315d7ef3c /arch/x86/math-emu/div_small.S | |
| parent | f6909f394c2d4a0a71320797df72d54c49c5927e (diff) | |
| download | op-kernel-dev-ae4b688db2432baad379f73fdcac13ec24f603d5.zip op-kernel-dev-ae4b688db2432baad379f73fdcac13ec24f603d5.tar.gz | |
x86: Move kernel_fpu_using to irq_fpu_usable in asm/i387.h
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>
Diffstat (limited to 'arch/x86/math-emu/div_small.S')
0 files changed, 0 insertions, 0 deletions
