linux-kernel - Re: [PATCH 3/6] x86: Add support for the clwb instruction

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Date:	Tue, 11 Nov 2014 12:40:00 -0700
From:	Ross Zwisler <ross.zwisler@...ux.intel.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	linux-kernel@...r.kernel.org,
	H Peter Anvin <h.peter.anvin@...el.com>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	David Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org, x86@...nel.org
Subject: Re: [PATCH 3/6] x86: Add support for the clwb instruction

On Tue, 2014-11-11 at 20:19 +0100, Borislav Petkov wrote:
> On Tue, Nov 11, 2014 at 08:12:39PM +0100, Borislav Petkov wrote:
> > > +			 ".byte 0x66; xsaveopt %P0",
> > 
> > Huh, XSAVEOPT?!? Shouldn't that be CLWB??
> 
> Bah, the same opcodes, only 0x66 prefix makes it into CLWB. Could use a
> comment I guess.

Yep, it's weird, I know.  :)  I'll add a comment.

Thanks,
- Ross

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