linux-kernel - RE: [Question] Why should we check irq_fpu_usable before accessing using ASENI instructions.

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Message-ID: <BLU174-W51BF77DBFE75E197C07DB095F50@phx.gbl>
Date:	Fri, 18 Jul 2014 07:34:27 -0700
From:	justin mattock <justin.mattock@...mail.com>
To:	Guruswamy Basavaiah <guru2018@...il.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-x86_64@...r.kernel.org" <linux-x86_64@...r.kernel.org>
Subject: RE: [Question] Why should we check irq_fpu_usable before accessing
 using ASENI instructions.


 
> Date: Fri, 18 Jul 2014 13:57:15 +0530
> Subject: [Question] Why should we check irq_fpu_usable before accessing using ASENI instructions.
> From: guru2018@...il.com
> To: linux-x86_64@...r.kernel.org
> 
> Hello,
> I am new to assembly language programming.
> In Kernel we check irq_fpu_usable before using any of AESNI related
> instruction.
> 1) why should we check the FPU is available for using AESNI instructions ?
> 2) Will AESNI intructions make use of FPU ?
> 
> I tried searching the answer in internet, no where i found the answer.
> Could please come one answer in this list.
> 
> Guru
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resending due to kernel(s) html bounces..

 

anyways hopefully somebody can see this post and answer your questions!
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