Re: Vanilla Linux 64-bit paravirt guest support

[Michael Abd-El-Malek <mabdelmalek@cmu.edu>]

Jeremy Fitzhardinge wrote:
> Michael Abd-El-Malek wrote:
>> Can someone tell me what the status of 64-bit paravirtualization 
>> support is in the vanilla Linux tree?  It seems that 2.6.24 only has 
>> 32-bit PV support.  And it seems that 2.6.25 will be getting 64-bit PV 
>> support.  Will it be complete?
> 
> No, 2.6.25 will not have 64-bit Xen support.  I'm hoping it will be 
> ready for .26.

Is 64-bit domU support available anywhere at the moment?  For example, what is 
the status of the git://git.et.redhat.com/xen-pvops-64.git tree?  I pulled that 
tree and tried building 64-bit Xen domU support (since this tree allows you to 
configure the kernel with that capability, unlike the vanilla Linux tree).  But 
compilation failed in enlighten.c because xen_smp_ops isn't defined in x86_64.

>> On a related note: is it possible to compile the PV network/block 
>> drivers for a HVM Linux guest with the newest kernels?  Compilation 
>> failed and a previous message on the list says that you can't do 
>> that.  The reason I'd want to do this is to let me run a 64-bit recent 
>> Linux kernel with PV drivers. 
> 
> No, we don't support that for the moment, though it would be a useful 
> thing to have.

Is there a reason this wouldn't work, or is it just "scripting changes" that 
need to be done?

Thanks,
Mike