linux-kernel - Re: [PATCH 18/25] [PATCH] turn priviled operations into macros in entry.S

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Date:	Wed, 8 Aug 2007 15:30:01 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	Glauber de Oliveira Costa <gcosta@...hat.com>,
	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
	rusty@...tcorp.com.au, mingo@...e.hu, chrisw@...s-sol.org,
	jeremy@...p.org, avi@...ranet.com, anthony@...emonkey.ws,
	virtualization@...ts.linux-foundation.org, lguest@...abs.org
Subject: Re: [PATCH 18/25] [PATCH] turn priviled operations into macros in entry.S

> If you were talking about the general iretq => INTERRUPT_RETURN, then the
> answer is "Yes, they are sufficient". The first version of lguest ran the
> guest kernel in ring 3 (using dual page tables for guest kernel and guest
> user).  The current version I'm pushing runs lguest in ring 1, and the
> entry.S code  worked for both.

How do you implement system calls then? 

-Andi
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