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RE: [Xen-devel] x86-64 Xen development

To: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>, "Jerone Young" <jyoung5@xxxxxxxxxx>
Subject: RE: [Xen-devel] x86-64 Xen development
From: "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
Date: Thu, 3 Mar 2005 09:03:09 -0800
Cc: "xen-devel" <xen-devel@xxxxxxxxxxxxxxxxxxxxx>, <ian.pratt@xxxxxxxxxxxx>
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Thread-topic: [Xen-devel] x86-64 Xen development
Ian Pratt wrote:
>>      What is Intel's status on x86-64 work for Xen? Do require any
>> assistance on any remaining work to get Xen x86-64 enabled? We want
>> to have more public discussion on x86-64 Xen development.
> Jun,
> Please can you post the x86_64 dom0 domain builder so that Jerone can
> get to work on the user space builder.
> Are there any fixes we need to do to x86_64 xen? Have you an ETA on
> the dom0 checkin?


I'm shooting the next week, in a week or so. We've been making steady
progress despite _numerous_ minor issus/problems. Jerone, it would be
helpful if you take a look at 32-bit apps support (i.e. what does it
take for us to support those in xenolinux64) because we are not
proactively looking at the area at this point.

There are a couple of minor fixes required in the hypervisor. For
example, check_descriptor() in arch/x86/x86-64/mm.c needs to shift bits
when comparing the value.  
/* The guest can only safely be executed in ring 3. */
    if ( ((b & _SEGMENT_DPL) >> 13) !=  3) {
                goto bad;
I'll send patches this week.


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