[Xen-users] Nested Xen hypervisor installation problems

["David A. Van Arnem" <dvanarnem@xxxxxxxxx>]

Hello,

I'm working on setting up a nested Xen hypervisor and I'm having 
difficulty, and I'm hoping someone can help.
I am using the current version of Xen in the Fedora 20 repositories 
(4.3.2-6). I've been able to successfully set up the L0 dom0, and 
install an HVM L1 domU using virt-install (both are using Fedora 20).  
My virt-install command was:
virt-install --hvm --name <domU name> --ram 4096 --vcpus 2 -f 
/dev/fedora/<lv name> --network bridge=virbr0 --cdrom <path to Fedora 20 
live iso> --livecd
Without the hypervisor, L1 acts fine -- I can connect to the network 
through L0 using the bridge, I can vnc to the desktop, and xl info shows 
virt_caps as hvm.  However, once I install Xen through yum (again 
4.3.2-6) and reboot with the hypervisor, L1 "works" (i.e. boots) but I 
lose some functionality.  First, the desktop no longer starts, I lose 
networking, and virt_caps in xl info is blank.  I can still do a command 
line login using virt-viewer.
I'm new to virtualization with Xen, so I believe my problem may be due 
to missing some key step(s) during the installation of L1.  So, here are 
my questions:
1.  Can L1 be installed correctly for use with a nested hypervisor using 
virt-install, or do I need to use xl directly? If so, what do I need to 
be aware of when installing?
2.  I see from the Xen wiki that nested virtualization requires a couple 
extra parameters to the config file (hap=1 and nestedhvm=1). Is it 
possible to specify these options with virt-install, since it doesn't 
seem to use the config files that xl does?
3.  Can I expect to get the desktop and networking in a L1 hypervisor setup?

4.  Do I need Xen 4.4 or should Xen 4.3.2-6 work?

I am using an Intel CPU with virtualization support, so I believe this 
should be possible for me.  Please let me know what other information I 
need to provide, and thanks in advance!
David

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