Re: [RFC 6/7] x86: Move kernel_fpu_using to asm/i387.h

From: H. Peter Anvin
Date: Wed Jun 17 2009 - 23:51:48 EST

Herbert Xu wrote:
> On Wed, Jun 17, 2009 at 10:06:44AM -0700, H. Peter Anvin wrote:
>> Huang: if I recall correctly, these functions were originally designed
>> to deal with the fact that VIA processors generate spurious #TS faults
>> due to broken design of the Padlock instructions. The AES and PCLMUL
>> instructions actually use SSE registers and so will require different
>> structure.
> No irq_ts_save was the one designed for the VIA, the Intel stuff
> does save the FPU state.

Ah, sorry, misremembered. Great! Will apply.


H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.

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