Re: [Xen-users] Kernel types and xen caps : PV/HVM, 32/64 bit, PAE/non-PAE

[Evan Lavelle <sa212+xen@xxxxxxxxxxx>]

jd wrote:
> Hi
>    
> Is there a doc/wiki page which explains, the  kind of
> domu images/appliances/kernels can be run with what
> type of dom0 kernels(xen_caps).
>
> For example :
> -- Can a 32 bit, non-PAE domU run on 64 bit, PAE dom 0
> in PV mode ? (or HVM mode ?)
See entry 1.7 in the FAQ:

http://wiki.xensource.com/xenwiki/XenFaq

I don't think there's a "64-bit PAE" - you only get 32-bit, 32-bit PAE, 
and 64-bit.
> Are there any checks that can be done before doing the
> migration ?
>
> Is there any programmatic way (from python) to find
> out  if the kernel in a domU disk image is 32bit/64
> bit/PAE/non-PAE/PV/HVM ?i.e. can I generate xen_caps
> like string from the kernel ?
I don't know any Python, but the example config file starts with

import os, re
arch = os.uname()[4]
if re.search('64', arch):
    arch_libdir = 'lib64'
else:
    arch_libdir = 'lib'

which I think is what you want.

Evan

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