linux-kernel - Re: [PATCH 2/5] x86, mpx: hook #BR exception handler to allocate bound tables

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Date:	Fri, 17 Jan 2014 19:23:21 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ren Qiaowei <qiaowei.ren@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] x86, mpx: hook #BR exception handler to allocate
 bound tables

On Fri, Jan 17, 2014 at 09:30:45AM -0800, H. Peter Anvin wrote:
> Yes. It would take some serious effort to get BOUND or MPX
> instructions into the kernel -- you'd have to put them in inline
> assembly, and BOUND doesn't even exist in 64-bit mode.

Which reminds me - we will have to explicitly turn off any compiler
switches that utilize MPX insns so that they don't get issued when
building the kernel. Provided there will be compiler support, that is.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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