Initialization of device arm_gic failed: KVM with user space irqchip only works when the host kernel supports KVM_CAP_ARM_USER_IRQ

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hello.

I’ve recompiled the kernel on ubuntu (20.04,installed following this tutorial :

of my Jetson nano because I wanted to enable kvm. I’ve found this tutorial and I’ve completed until the end :

and I’ve enabled kvm with kernel 4.9.201-tegra,but when I try to virtualize something,like freebsd using virt-manager I get the following error :

Can’t complete installation ‘internal error: process exited while connecting to monitor: qemu-system-aarch64: Initialization of device arm_gic failed: KVM with user space irqchip only works when the host kernel supports KVM_CAP_ARM_USER_IRQ’

how to fix it ?

I’m using qemu version 4.2.1. Should I upgrade it ?

Should I apply these patches ?

thanks.

3

Hi, sorry that we haven’t done this so far.
Maybe you can wait for other users to share their experience, or try the patch as you mentioned.

4

thanks. I did that on the past just right here. I’d forgot how,but now I have remembered. It’s something like this :

git clone https://github.com/OE4T/linux-tegra-4.9.git

cd linux-tegra-4.9

git checkout oe4t-patches-l4t-r32.5

cp /proc/config.gz .

gunzip config.gz

mv config .config

make menuconfig —> (enable kvm)

make -j4

make -j4 modules_install

make -j4 Image

mv /boot/Image Image-kvm-old

cp arch/arm64/boot/Image /boot/Image

reboot

the dtb file to use is called : tegra210-p3448-0000-p3449-0000-a02.dtb and the extlinux.conf is something like this :

TIMEOUT 30
DEFAULT primary

MENU TITLE L4T boot options

LABEL primary
MENU LABEL primary kernel
LINUX /boot/Image-kvm
INITRD /boot/initrd
FDT /boot/tegra210-p3448-0000-p3449-0000-a02.dtb
APPEND ${cbootargs} quiet root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 console=ttyS0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0
6

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