From: "H. Peter Anvin" <hpa@zytor.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Ingo Molnar <mingo@elte.hu>, Huang Ying <ying.huang@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org
Subject: Re: [RFC 6/7] x86: Move kernel_fpu_using to asm/i387.h
Date: Wed, 17 Jun 2009 20:51:08 -0700 [thread overview]
Message-ID: <4A39B9AC.30807@zytor.com> (raw)
In-Reply-To: <20090618014858.GA1368@gondor.apana.org.au>
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.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-06-18 3:51 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-11 7:10 [RFC 6/7] x86: Move kernel_fpu_using to asm/i387.h Huang Ying
2009-06-11 7:10 ` Huang Ying
2009-06-17 16:46 ` Ingo Molnar
2009-06-17 17:06 ` H. Peter Anvin
2009-06-18 1:48 ` Herbert Xu
2009-06-18 3:51 ` H. Peter Anvin [this message]
2009-06-18 1:57 ` Huang Ying
2009-06-18 3:52 ` H. Peter Anvin
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