Add option to bypass default hardcoded kernelopts

[marmarek]

By default VM's kernelopts are only added to default hardcoded values. Right now, for Qubes 4.0, this hardcoded part is:

root=/dev/mapper/dmroot ro nomodeset console=hvc0 rd_NO_PLYMOUTH rd.plymouth=0 plymouth.enable=0

This is useful for Linux VMs (especially root=/dev/mapper/dmroot part), but for others it is either useless (Windows), or even harmful (Mirage OS). In some cases, even for Linux it needs some adjustments (nomodeset is harmful for GPU passthrough).

So, it would be useful to have an option to not prepend those options and use only what's set in kernelopts property. But it needs to be done carefully to not break existing installations - if in any case, root=/dev/mapper/dmroot (or other) would be unexpectedly removed, VM will not boot.
I think this can be done with no-default-kernelopts qvm-feature, which would be disabled by default.
Alternative approach would be to remove this hardcoded value from libvirt xml template and move to default kernelopts value, but that is more fragile:

• existing configurations with modified kernelopts will need to be converted
• such conversion needs to be done only once!
• kernelopts value will be quite long and easy to mess it up (either using qvm-prefs, or GUI settings, as it almost never will fit in that window)

[qubesos-bot]

Automated announcement from builder-github

The package qubes-core-dom0-4.0.35-1.fc25 has been pushed to the r4.0 testing repository for dom0.
To test this update, please install it with the following command:

sudo qubes-dom0-update --enablerepo=qubes-dom0-current-testing

Changes included in this update

[qubesos-bot]

Automated announcement from builder-github

The package qubes-core-dom0-4.0.37-1.fc25 has been pushed to the r4.0 stable repository for dom0.
To install this update, please use the standard update command:

sudo qubes-dom0-update

Or update dom0 via Qubes Manager.

Changes included in this update