linux-kernel - Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v2)

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Message-ID: <20080416153731.GA17852@Krystal>
Date:	Wed, 16 Apr 2008 11:37:31 -0400
From:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Andi Kleen <andi@...stfloor.org>, akpm@...l.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Frank Ch. Eigler" <fche@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v2)

* Ingo Molnar (mingo@...e.hu) wrote:
> 
> * Ingo Molnar <mingo@...e.hu> wrote:
> 
> > thanks Mathieu, i've picked this up into x86.git for more testing.
> 
> ... but had to drop it due to missing PARAVIRT support which broke the 
> build. I guess on paravirt we could just initially define 
> INTERRUPT_RETURN_NMI_SAFE to iret, etc.?
> 

Yes, I was about to email you about this.

Would it be valid to execute a popf in PARAVIRT or should be have some
special support like the normal iret does ?

And yes, initially using iret for paravirt should just work, but it
would leave the NMI iret issue for paravirt.

Mathieu

> 	Ingo
> 

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
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