Hi everyone, 
I am having some trouble with the pre-launched VM and Zephyr in the hybrid scenario and I would be grateful for some advice.

Host Hardware: 
I attached the board configuration file 'my_board.xml'. Unfortunately, my board does not have a serial port. I'm using an m.2 to PCI-e adapter and a PCI-card with serial ports.
I added the TTYS_INFO in the board configuration file manually as I wasn't able to build ACRN without this information in the "my_board.xml" file.

Software Versions:
ACRN-Kernel: release_2.7
ACRN-HV: release_2.7
SOS: Ubuntu 18.04.6
I also tried to use version 2.6 of HV and Kernel but wasn't able to boot into the service VM.

Scenario
I use the default hybrid scenario. I attached the scenario file.

Problem description
When I start up my system I get a message "[21611179us][cpu=3][(null)][sev=3][seq=30]:failed to load VM 0 kernel module". Then the service VM boots. I attached the complete output of the ACRN-Shell.

Additional Information
I set up the bootloader as described in the documentation for the hybrid scenario. I attached both grub files "40_custom" and "grub". I also attached the "zephyr.elf" image. I tested the Zephyr image in a post-launched VM, so the Zephyr image shouldn't be the problem.

I really would appreciate any idea of what I can try to get the system running.

Thanks in advance

Best
Florian

Hi Florian,

The log shows your GRUB put the module at HPA 0, which ACRN doesn’t support. Please try GRUB of Ubuntu 20.04, or rebuild a new GRUB by yourself.

[21602370us][cpu=3][(null)][sev=3][seq=27]:Unsupported module: start at HPA 0, size 0x7e998

You can refer source code at acrn-hypervisor/hypervisor/boot/guest/vboot_info.c:

              /* GRUB might put module at address 0 or under 1MB in the case that the module size is less then 1MB

              * ACRN will not support these cases

              */

              if ((mod != NULL) && (mod->start == NULL)) {

                             pr_err("Unsupported module: start at HPA 0, size 0x%x .", mod->size);

                             mod = NULL;

              }

BR,

Victor

Hi Florian,

As Victor mentioned; please refer following guide to rebuild grub:

https://projectacrn.github.io/latest/tutorials/using_grub.html#installing-self-built-grub

And make sure below commit is included:

Thanks!

BR.

Fuzhong

Hi Florian,

The log shows your GRUB put the module at HPA 0, which ACRN doesn’t support. Please try GRUB of Ubuntu 20.04, or rebuild a new GRUB by yourself.

[21602370us][cpu=3][(null)][sev=3][seq=27]:Unsupported module: start at HPA 0, size 0x7e998

You can refer source code at acrn-hypervisor/hypervisor/boot/guest/vboot_info.c:

              /* GRUB might put module at address 0 or under 1MB in the case that the module size is less then 1MB

              * ACRN will not support these cases

              */

              if ((mod != NULL) && (mod->start == NULL)) {

                             pr_err("Unsupported module: start at HPA 0, size 0x%x .", mod->size);

                             mod = NULL;

              }

BR,

Victor

Hi Victor, 
Thanks for your help.
With an image larger than 1 MB and Ubuntu 20.04 everything works fine. 

Best regards,
Florian 

Hi Victor, 
Thanks for your help.
With an image larger than 1 MB and Ubuntu 20.04 everything works fine. 

Best regards,
Florian