Messages in this thread | | | Date | Sun, 30 Jul 2006 21:28:42 +0300 | From | Avi Kivity <> | Subject | Re: FP in kernelspace |
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Jan Engelhardt wrote: > > > kernel_fpu_begin(); > > c = d * 3.14; > > kernel_fpu_end(); > > static inline void kernel_fpu_begin() { > ... > preempt_disable(); > ... > } > Is the kernel allowed to clobber userspace's sse registers?
What about interrupt code?
xor.h at least appears to save the sse state before use.
-- Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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