linux-kernel - Re: [PATCH] deal with interrupt shadow state for emulated instruction

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Message-ID: <49E4B4D4.1020903@zytor.com>
Date:	Tue, 14 Apr 2009 09:07:48 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Glauber Costa <glommer@...hat.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] deal with interrupt shadow state for emulated instruction

Avi Kivity wrote:
> 
> The comment about repeating 'mov ss' in the manual has that wonderful
> word in it, May.  That means we're perfectly allowed to ignore it and
> just set the flag unconditionally.
> 

Realistically, though, this should only be done for a limited number of
sequential instructions.

> I doubt we'll ever see a repeated 'mov ss', once is more than enough.

True enough, except maliciously.

	-hpa

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

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