xen detection broken

[stbuehler]

Using PVHVM (but was also broken with PV, just don't have the data anymore). Using packages from debian stable.

I know about #15, tried patching it locally - usually the output is Unknown, sometimes it picks Xen PV. When I tried fixing the sort locally the output is always Unknown.

Maybe http://www.brendangregg.com/blog/2014-05-09/xen-feature-detection.html is useful.

Bit 11 (0x800) in /sys/hypervisor/properties/features marks dom0 vs domU (when /sys/hypervisor/type is xen).

Intel(R) Xeon(R) CPU E5-2609 0 @ 2.40GHz

# imvirt -d
[...]
$VAR1 = {
          'Xen HVM 4.8' => '0.447761194029851',
          'Xen PV' => '0.537313432835821',
          'Physical' => '0.0149253731343284'
        };
[...]

# /usr/lib/imvirt/hvm
XenVMMXenVMM
# /usr/lib/imvirt/xen
HVM 4.8
# cat /sys/hypervisor/type
xen
# cat /sys/hypervisor/properties/features
00002705
# dmesg | grep 'Xen HVM'
[    0.000000] DMI: Xen HVM domU, BIOS 4.8.3-pre 11/25/2017
[    0.000000] Booting paravirtualized kernel on Xen HVM
[    0.000000] xen:events: Xen HVM callback vector for event delivery is enabled

Intel(R) Xeon(R) CPU E3-1220 V2 @ 3.10GHz

# imvirt -d
[...]
$VAR1 = {
          'Xen PV' => '0.556701030927835',
          'Physical' => '0.0103092783505155',
          'Xen HVM 4.8' => '0.43298969072165'
        };
[...]

# /usr/lib/imvirt/hvm 
XenVMMXenVMM
# /usr/lib/imvirt/xen
HVM 4.8
# cat /sys/hypervisor/type
xen
# cat /sys/hypervisor/properties/features
00002705
# dmesg | grep 'Xen HVM'
[    0.000000] DMI: Xen HVM domU, BIOS 4.8.3-pre 11/25/2017
[    0.000000] Booting paravirtualized kernel on Xen HVM
[    0.000000] xen:events: Xen HVM callback vector for event delivery is enabled