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

Sounds awesome! I'll be looking into supporting 32-bit apps. I am also
getting the current tool ready for x86-64 to be able to lauch 64-bit

Supporting 32-bit apps (as well as 32bit domains) are going to require
an ioctl conversion layer as some syscall conversion stuff. Not 100%
sure yet on how things are going to be just yet. I'll figure something
out and get back to the list.

On Thu, 2005-03-03 at 09:03 -0800, Nakajima, Jun wrote:
> 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?
> Ian,
> 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.
> Jun
Jerone Young
Open Virtualization
IBM Linux Technology Center
512-838-1157 (T/L: 678-1157)

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