Hello,

in oVirt 4.3.7 in "Edit VM" -> System -> Advanced parameters

I can choose

Bios Type:

Default

Q35 Chipset with Legacy BIOS

Q35 Chipset with UEFI BIOS

Q35 Chipset with SecureBoot

and

Custom Emulated Machine:

Use cluster default (pc-i440fx-rhel7.6.0)

...

q35

pc-q35-rhel7.3.0

pc-q35-rhel7.4.0

pc-q35-rhel7.5.0

pc-q35-rhel7.6.0

and I can apparently mix all possible values.

Any deeper information about implications?

What is the "Default" value for Bios Type?

Did anything change in 4.3.8 (eg official support for q35)?

I search also through official docs for RHV 4.3 (virtual mgmt guide, appendix A), but for example I don't find any reference to the "Bios Type" parameter and a vague reference to the "Custom Emulated Machine". Is there any more detailed link?

Thanks,

Gianluca