kexec not working in xen domU?

[Phillip Susi]

Phillip Susi writes:

> I tried with -s and it didn't help.  So far I tried it originally on my
> Ubuntu 20.04 amazon vps, then on my debian testing ( linux 5.9.0 ) on my
> local xen server.  I'll try building the latest upstream kernel and
> kexec tomorrow.

Built the latest kexec-tools and linux kernel from git today and get
the same results.  Is there a minimum version of xen required for this
to work?  I have no idea what Amazon is running but my server has 4.9.