Not able to netboot UEFI arm64 system with a GRUB.

[jorgesanjuan]

Hi,

I am trying to boot a UEFI ARM64 system on the net. My tftp server is an 
amd64 machine and the UEFI client is a arm64 machine. When I net-boot 
the arm64 system I can only see the GRUB's rescue shell and if I press 
'ls' I can only see the (hd0) device.

However, I've been trying to run the linux command on the GRUB's shell 
as follows:

grub>
grub> set net_default_server=192.168.255.1
grub> set root=(tftp,192.168.255.1)
grub> linux /fedora23Aarch64/vmlinuz
error: timeout: could not resolve hardware address.
grub>

# The tftp server root is in /var/lib/tftpboot and I have vmlinuz there 
for now.

When I do this, however, I can see some ARP requests/ replies on the 
server side, but the tftp connection never starts.

On the other hand, I've been using available arm64 GRUBs on different 
linux distros:

- Ubuntu: https://wiki.ubuntu.com/ARM/Server/Install/UEFI
- Fedora: (Grubaa64.efi) 
http://dl.fedoraproject.org/pub/fedora-secondary/releases/23/Server/aarch64/os/EFI/BOOT/

I then tried to create my own grub (maybe those grubs where not allowing 
tftp devices) to control all the modules I put on it but I couldn't make 
my own GRUB following this (3.2 chapter):

https://wiki.linaro.org/LEG/Engineering/Kernel/UEFI/UEFI_Network_Booting#GRUB

The error I got when doing make after ./autoconf and ./configure  is:

In file included from term/efi/serial.c:29:0:
../include/grub/serial.h:25:25: fatal error: grub/cpu/io.h: No such file 
or directory
 #include <grub/cpu/io.h>

(See attached file for more details).

Hopefully I can have this solved.

Thank you,
Jorge

grub_log
Description: Text document