linux-kernel - Re: [PATCH 0/9] KVM: Make the instruction emulator aware of Nested Virtualization

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Message-ID: <18726.1291060870@localhost>
Date:	Mon, 29 Nov 2010 15:01:10 -0500
From:	Valdis.Kletnieks@...edu
To:	Joerg Roedel <joro@...tes.org>
Cc:	"Roedel, Joerg" <Joerg.Roedel@....com>,
	Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/9] KVM: Make the instruction emulator aware of Nested Virtualization

On Mon, 29 Nov 2010 19:32:12 +0100, Joerg Roedel said:
> On Mon, Nov 29, 2010 at 12:23:38PM -0500, Valdis.Kletnieks@...edu wrote:
> > (Sorry for late reply...)
> > 
> > On Thu, 25 Nov 2010 17:23:13 +0100, "Roedel, Joerg" said:
> > > On Thu, Nov 25, 2010 at 10:17:53AM -0500, Avi Kivity wrote:
> > > > On 11/25/2010 03:13 PM, Roedel, Joerg wrote:
> > > > What about things like adding instructions and forgetting to add the 
> > > > corresponding svm.c code?
> > > Cannot happen. Every instruction that can be intercepted with SVM is
> > > already handled in this patch-set.
> > 
> > Call us back when Intel releases the i9 and i11 with new instructions
> > that need intercept handling. ;)
> 
> How does that affect SVM?

It will quite possibly include instructions that can be intercepted with SVM
that are not in this patch set.  At which point Joerg's comment can apply - it
will be possible to add it in one place and forget to add it in the svm.c code.


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