Re: [opensuse-arm] openSUSE-Tumbleweed ARM JeOS-efi.armv7

On 24.01.18 17:43, Matwey V. Kornilov wrote:

2018-01-24 16:38 GMT+03:00 Alexander Graf :

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On 24.01.18 13:15, Matwey V. Kornilov wrote:

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Hi,

There is one more thing that is unclear to me now. As far as I understand there is no other way except FDT to provide hardware layout for armv7l kernel. Then, who is responsible for FDT loading? As far as I understand it is grub2 task to load FDT from the table at b1b621d5-f19c-41a5-.... And FDT is completely provided by UEFI firmware. In case of u-boot, dtb file is loaded from the disk by means of u-boot and placed into memory. What should happen here when OVMF is used? In theory, it has to be configured to generate FDT from QEMU config somehow, right? Or pass-through entire FDT from Qemu hypervisor?

It basically passes through the device tree that's generated by QEMU, yes. However, OVMF defaults changed a while back and it only exposes ACPI tables instead of DT in newer versions on AArch64 IIRC.

Maybe something went wrong and they changed them for armv7 as well by accident?

I use latest version of aarch32 OVMF firmware from openSUSE:Factory:ARM. Well, then, I suppose, I have to see appropriate EFI driver (FdtClientDxe ? ) in the driver list.

I don't think the fact that the driver is loaded tells you anything. I assume you can't boot the VM properly? Does grub see the DT table? lsefi in grub should show you iirc. If it doesn't show it, but instead shows ACPI tables, can you try to pass -no-acpi to QEMU? Alex -- To unsubscribe, e-mail: opensuse-arm+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-arm+owner@opensuse.org