libxl: error: libxl_create.c:720:libxl__domain_make: domain creation fail: Permission denied

[Mario Marietto <marietto2008@xxxxxxxxx>]

Hello to everyone.

I'm trying to boot Linux 6.1.y as Xen dom0 on the Chromebook xe303c12, aka Snow and configure and start a very basic domU guest,following the Chuck's tutorial,located here :

https://github.com/mobile-virt/u-boot-chromebook-xe303c12/tree/chromebook/xen#starting-a-domu-guest

What I did has been to carefully follow his instructions,but I haven't found a solution to fix this problem,yet :

# sudo xl create devuan.cfg -c

Parsing config from devuan.cfg libxl: 
error: libxl_create.c:720:libxl__domain_make: domain creation fail: Permission denied 
libxl: error: libxl_create.c:1309:initiate_domain_create: cannot make domain: -3

This is my devuan.cfg file :

kernel = '/Dati/xen/kernels/zImage-6.1.59-stb-xen-cbe+' 
memory = '512' 
name = 'Devuan' 
vcpus = '1' 
disk = [ '/Dati/xen/devuan.img,,xvda,w' ] 
extra = 'console=hvc0 root=/dev/xvda rw init=/sbin/init xen-fbfront.video=24,1024,768'

(I have tried also with root=/dev/xvda1 and root=/dev/xvda2,but leaving disk = [ '/Dati/xen/devuan.img,,xvda,w' ] and not xvda1 or 2)

I have no idea about the reason(s) I always get that error,but I don't think it is caused by a wrong creation of the devuan.img file. Can someone point me in the right direction to understand what could be wrong ? I haven't found any useful information on the internet.

This is bootxen.scr file where I have configured dom0_mem=768 :

mmc dev 1 
ext2load mmc 1:3 0x42000000 zImage-6.6.0-xen-iommu-dma-on-xen 
ext2load mmc 1:3 0x51000000 xen-4.17-armhf-armmp-0x51004000.ub 
ext2load mmc 1:3 0x5ffec000 exynos5250-snow.dtb 
fdt addr 0x5ffec000 
fdt resize 1024 
fdt set /chosen #address-cells <0x2> 
fdt set /chosen #size-cells <0x2>
fdt set /chosen xen,xen-bootargs "console=dtuart dtuart=serial0 dom0_mem=768M dom0_max_vcpus=2 bootscrub=0 vwfi=native sched=null"
fdt mknod /chosen dom0 
fdt set /chosen/dom0 compatible  "xen,linux-zimage" "xen,multiboot-module" "multiboot,module"
fdt set /chosen/dom0 reg <0x0 0x42000000 0x0 0x87C200 >
fdt set /chosen xen,dom0-bootargs "console=tty1 root=/dev/mmcblk1p4 rw rootwait clk_ignore_unused --no-log"
bootm 0x51000000 - 0x5ffec000

and I've rebooted the Chromebook using this command :

SMDK5250 # mmc dev 1 
SMDK5250 # ext2load mmc 1:3 0x50000000 bootxen.scr; source 0x50000000

This is the memory available on the machine after having booted the machine ready for xen :

# free -m

         total        used        free      shared  buff/cache   available
Mem:       741         329         108           7         332         412 
Swap:        0           0           0

I've found a similar error on this post,made on 2012 :

https://groups.google.com/g/qubes-devel/c/W1lM4ELuVVI

and according to what has been asked there,I want to post some further relevant informations to help you to help me to debug the problem :

xl dmesg : https://pastebin.ubuntu.com/p/YvtdCPwMWW/

dmesg : https://pastebin.ubuntu.com/p/9cNxCTXVrd/

mousepad xenstored-access.log : https://pastebin.ubuntu.com/p/RTPBG9nS8R/

mousepad xenstored.log : https://pastebin.ubuntu.com/p/T354ts33nP/

--

Mario.