linux-kernel - Re: [patch 3/8] Allow a kernel to not be in ring 0.

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Message-ID: <44D41DEF.7040301@vmware.com>
Date:	Fri, 04 Aug 2006 21:26:23 -0700
From:	Zachary Amsden <zach@...are.com>
To:	Chuck Ebbert <76306.1226@...puserve.com>
Cc:	Jeremy Fitzhardinge <jeremy@...source.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	virtualization <virtualization@...ts.osdl.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [patch 3/8] Allow a kernel to not be in ring 0.

Chuck Ebbert wrote:
> In-Reply-To: <20060803002518.190834642@...source.com>
>
> On Wed, 02 Aug 2006 17:25:13 -0700, Jeremy Fitzhardinge wrote:
>
>   
>> We allow for the fact that the guest kernel may not run in ring 0.
>> This requires some abstraction in a few places when setting %cs or
>> checking privilege level (user vs kernel).
>>     
>
> I made some changes:
>
> a. Added some comments about the SEGMENT_IS_*_CODE() macros.
> b. Added a USER_RPL macro.  (You were comparing a value to a mask
>    in some places and to the magic number 3 in other places.)
> c. Changed the entry.S tests for LDT stack segment to use the macros.
>   

These changes look great.  Ack-ed.  I had some similar ones before that 
never made it from my tree, as I got carried away and tried to unify the 
user descriptor conversion functions... someday I'll get to it again.

Zach
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