How do you test heads with QEMU?

[itay-grudev]

Kyle Ranking told me that when playing with heads one option to test is to simulate it with QEMU and some of you are using it. That will be much more convenient than re-flashing every time, but when I tried setting it up I couldn't.

Do you have a script or can you provide the qemu command with all the args and options you use?

[ThatLurker]

Is this what your looking for https://github.com/osresearch/heads-wiki/blob/master/Emulating-Heads.md

[tlaurion]

@itay-grudev : I think make run does it, but wasn't able to simply test it.

Emulating Heads needs to be updated. Heads doesn't include Xen anymore since kexec got fixed.

[itay-grudev]

I'm compiling the qemu-coreboot image right now. Will give feedback later today.

[tlaurion]

if anyone knows how to play around qemu in docker, that would be aweome to share.
I innocently tried here, without success.

[tlaurion]

Another Heads issue directs to bypass coreboot booting and instruct to boot kernel and initrd, which unfortunately misses the point of measuring coreboot.

[tlaurion]

@itay-grudev how were your tests? :)

[itay-grudev]

make run fails with:

❯ make run
qemu-system-x86_64 \
	--machine q35 \
	--serial /dev/tty \
	--bios /home/ito/Projects/heads/build/qemu-coreboot/coreboot.rom \
; stty sane
qemu-system-x86_64: Initialization of device e1000e failed: failed to find romfile "efi-e1000e.rom"

[paulmenzel]

On 02/15/19 11:52, Itay Grudev wrote: `make run` fails with: ``` ❯ make run qemu-system-x86_64 \ --machine q35 \ --serial /dev/tty \ --bios /home/ito/Projects/heads/build/qemu-coreboot/coreboot.rom \ ; stty sane qemu-system-x86_64: Initialization of device e1000e failed: failed to find romfile "efi-e1000e.rom" ```

As a workaround, please add `-nic none` to that call, and check, if it fixes the issue. Otherwise, you need to find the option ROM somewhere.

[itay-grudev]

Thanks. I was able to get it working with:

diff --git a/boards/qemu-coreboot/qemu-coreboot.config b/boards/qemu-coreboot/qemu-coreboot.config
index 9427a2a..a0520fe 100644
--- a/boards/qemu-coreboot/qemu-coreboot.config
+++ b/boards/qemu-coreboot/qemu-coreboot.config
@@ -42,4 +42,5 @@ run:
                --machine q35 \
                --serial /dev/tty \
                --bios $(build)/$(BOARD)/coreboot.rom \
+               -nic none \
        ; stty sane

[itay-grudev]

Do you know how can I get the GUI working? I am currently getting:

Error: Can't find usable screen

It's probably some QEMU option, I just can't find it.

[tlaurion]

FYI: debian-9 can install qemu tools in a TemplateVM, fedora-29 can't for the moment. It will be fixed in QubesOS 4.1.

I gave up a long time ago trying to build Heads in debian templates, and CI based on ubuntu are currently failing @osresearch.

[tlaurion]

Do you know how can I get the GUI working? I am currently getting:

Error: Can't find usable screen

It's probably some QEMU option, I just can't find it.

@itay-grudev : https://github.com/flammit/heads/tree/qemu-gui-init
Ping me back if that works. That should probably merged in master too.

[itay-grudev]

Yep. That works. I realised that some of the settings were missing, but didn't replicate them exactly. And that PR did it. Thanks a lot. I will close this and vote on your #527 PR.

@tlaurion Should we also create a PR with -nic none (diff above)?