Xen dom0 support for virt-what seems broken

[Daniele Palumbo <daniele@xxxxxxxxxxxx>]

Hi,

First, i'm new to this list.
Therefore, hi everyone once again.

I was upgrading on a Gentoo server virt-what from 1.18 to 1.21.
Suddenly, facter reported that 
is_virtual = true.

I've tracked this down to:
v1.18:
xen-lipi-1 ~ # /usr/libexec/virt-what-cpuid-helper

xen-lipi-1 ~ # virt-what
xen
xen-dom0
xen-lipi-1 ~ #

v1.21:
xen-lipi-4 ~ # /usr/libexec/virt-what-cpuid-helper
XenVMMXenVMM
xen-lipi-4 ~ # virt-what
xen
xen-hvm
xen-lipi-4 ~ #

This seems anyhow to be a change between v1.20 and v1.21 in virt-what-cpuid-helper.c:
[...]
+static int
+known_signature (const char *sig)
[...
+    strcmp (sig, "XenVMMXenVMM") == 0 ||
[...]

If we go back to virt-what.in:
[...]
# Check for Xen.

if [ "$cpuid" = "XenVMMXenVMM" ] &&
    ! echo "$dmi" | grep -q 'No SMBIOS nor DMI entry point found, sorry'; then
    echo xen; echo xen-hvm
    skip_qemu_kvm=true
[...]

Therefore the output will always be 
"""
xen
xen-hvm
"""

Which seems to not contain xen-dom0, so i would say that the problem is in virt-what.
If i'm wrong, and the problem is in facter, i would happily report a but there.

HTH,
Daniel