Linux kernel image

[WeetHet]

Where could I take a linux kernel image for Apple Virtualisation?

[ghost]

Yeah, I'd like to know as well. Selecting Apple Virtualization makes the kernel a required field, is this intended? Where should I get a pre-built Kernel image?

[stan-kondrat]

I found some Information, but I didn't succeed to launch

https://developer.apple.com/documentation/virtualization/running_linux_in_a_virtual_machine

You may obtain a kernel image and the corresponding initial RAM disk image for a given release of the Fedora Linux distribution from https://download.fedoraproject.org/pub/fedora/linux/releases/<release>/Everything/<architecture>/os/images/pxeboot, where <release> is the Fedora release number and <architecture> is x86_64 for Intel Macs and aarch64 for Apple silicon Macs.

[19h]

You can download something like ubuntu, extract initrd (ramdisk) and vmlinuz from casper/initrd and caspter/vmlinuz, respectively. Then use vmlinuz as the kernel image and initrd as initial ramdisk, select the ubuntu distribution iso as boot image. It should run just fine.

[19h]

Unfortunately. this is easier said than done. The kernel and image need to be uncompressed. The scripts for decompressing kernels don't work on MacOS. It would be great if there was a straightforward tutorial on the steps to uncompress these files on an Apple Silicon device.

I don’t understand this. I literally am running Ubuntu on my M1 Max MBP (macOS Ventura) using these exact files. You can use 7z x ubuntu.iso to decompress the image and then use the files as specified above.

[ballo]

I tried to get a debian based distro running (parrotos) and failed miserably. I'm only trying this because QEMU USB passthrough support is broken. I tried using the initrd.img and vmlinuz files from an existing install. The utter lack of documentation or specifications as to what files to use in what format is frustrating.

I have zero interest in using Ubuntu (which is honestly more bloated than Microsoft Windows these days)

[ballo]

file says vmlinuz is a Linux kernel

[ktprograms]

Are both the initrd and vmlinuz not gzipped?

[ballo]

Correct

[pkpfr]

When I try, I just get a black screen on boot. As mentioned, a couple of paragraphs in the readme on the exact steps to take to get The latest Ubuntu running under Apple Virtualisation would be incredibly valuable.

…

On 13 Jun 2022, at 22:30, 19h ***@***.***> wrote:  Unfortunately. this is easier said than done. The kernel and image need to be uncompressed. The scripts for decompressing kernels don't work on MacOS. It would be great if there was a straightforward tutorial on the steps to uncompress these files on an Apple Silicon device. I don’t understand this. I literally am running Ubuntu on my M1 Max MBP (macOS Ventura) using these exact files. You can use 7z x ubuntu.iso to decompress the image and then use the files as specified above. — Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you commented.

[ktprograms]

Are you using x86_64? IIRC the x86_64 kernels aren't compressed whole, instead there's a decompressor built in.

[pkpfr]

No, I’m using an ARM64 Apple M1.

…

On 14 Jun 2022, at 08:37, ktprograms ***@***.***> wrote: Are you using x86_64? IIRC the x86_64 kernels aren't compressed whole, instead there's a decompressor built in. — Reply to this email directly, view it on GitHub <#3577 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AM6CA3C6U5JDANJA2N5KILLVO7O4JANCNFSM5NPIZ4BQ>. You are receiving this because you commented.

[pkpfr]

The ARM64 Ubuntu files are compressed with gzip (vmlinuz) and zstd (initrd). I have uncompressed both files and but it still starts with a blank window. There's another user with a similar problem, so I have added the console output to that issue. #4004 (comment).

[vincent-olivert-riera]

The ARM64 Ubuntu files are compressed with gzip (vmlinuz) and zstd (initrd). I have uncompressed both files and but it still starts with a blank window. There's another user with a similar problem, so I have added the console output to that issue. #4004 (comment).

Same problem here. I'm using the kernel and initrd (I have uncompressed it with gzip -d) from Debian:

Debian % file *
initrd: ASCII cpio archive (SVR4 with no CRC)
linux:  Linux kernel ARM64 boot executable Image, little-endian, 4K pages

The files were downloaded from here:

• https://deb.debian.org/debian/dists/bullseye/main/installer-arm64/current/images/netboot/debian-installer/arm64/linux
• https://deb.debian.org/debian/dists/bullseye/main/installer-arm64/current/images/netboot/debian-installer/arm64/initrd.gz

[sscarduzio]

Did anyone have luck booting any Linux distro in UTM on M1 with Apple Virtualization enabled?

[LXY1226]

emm... There has a correct configuration
kernel Image: ubuntu-21.04-server-cloudimg-arm64-vmlinuz-generic
initrd: ubuntu-21.04-server-cloudimg-arm64-initrd-generic
kernel param: console=hvc0

after downloaded, mv ubuntu-21.04-server-cloudimg-arm64-vmlinuz-generic ubuntu-21.04-server-cloudimg-arm64-vmlinuz-generic.gz && gunzip ubuntu-21.04-server-cloudimg-arm64-vmlinuz-generic.gz, then it should works.

also alpine linux is working too.
iso: alpine-virt-3.16.0-aarch64.iso # I'm in China, so change it to your closer mirror
unpack it, gunzip boot/vmlinux, and it should work with same kernel param

[tleerai]

Receiving error:

No root device specified. Boot arguments must include a root= parameter

[Sitin]

For 22.04 here is the root folder for downloads https://cloud-images.ubuntu.com/releases/22.04/release/unpacked/

[Sitin]

This setup gives me a minimal Ubuntu OS. At the moment stuck on booting with iso image with Ubuntu Server. Any suggestions?

[Sitin]

Kernel and ramdisk for 22.04 can be found here: https://cloud-images.ubuntu.com/releases/22.04/release/unpacked/.

mkdir -p ~/Downloads/ubuntu-utm
cd ~/Downloads/ubuntu-utm

# For kerken
curl https://cloud-images.ubuntu.com/releases/22.04/release/unpacked/ubuntu-22.04-server-cloudimg-arm64-vmlinuz-generic -o ubuntu-22.04-server-cloudimg-arm64-vmlinuz-generic.gz
gunzip ubuntu-22.04-server-cloudimg-arm64-vmlinuz-generic.gz

# For ramdisk
curl https://cloud-images.ubuntu.com/releases/22.04/release/unpacked/ubuntu-22.04-server-cloudimg-arm64-initrd-generic -o ubuntu-22.04-server-cloudimg-arm64-initrd-generic

Boot params: console=hvc0 rd.break=initqueue

I was able to boot "something". Will create a gist and HOWTO one there will be any success.

[testn]

Did anyone find a working instruction for this?

[rebooting]

thanks folks for the hints on how to set up the VM!

using @LXY1226 's instructions, I've managed to boot the Ubuntu cloud image.
Main points:

• you need to figure out what is your image's device name ( /dev/vda , or /dev/vdb for example, usually just /dev/vda if you only have a disk image configured)
• the boot uses raw disk, you need to use the raw image ( e.g. download and untar this https://cloud-images.ubuntu.com/jammy/current/jammy-server-cloudimg-arm64.tar.gz
• boot params console=hvc0 root=/dev/vda or console=hvc0 root=/dev/vdb depending on your device name and order

that's the least number of steps to see it boot up to the OS.

You will need a cloud init iso to configure the user for login ( and update packages)

I've documented it here, let me know if it's useful.

https://workinginavirtualspace.blogspot.com/2022/11/using-umt-to-create-virtual-machines.html

[Sheorath]

Works very well, documentation could be a bit better

For People who are lost with the boot.iso (seed.iso):
https://www.how2shout.com/linux/install-ubuntu-20-04-22-04-cloud-image-minimal-on-virtualbox/#3_Download_SeedISO_file

[chrispreee]

Enormous thanks LXY1226 and rebooting

Has anyone got ubuntu-desktop to work on Apple Hypervisor? It installed but boots into CLI (I presume due to a graphics issue).

[ktprograms]

GUI Linux with Apple Virtualization.framework is only available on macOS 13. With macOS 13, Apple Virtualization.framework also supports EFI/ISO boot, so you don't need to extract the kernel image.

[XavierFilipe]

I'm using fedora 38 arm64, and i would like to compile upstream kernel linux (from source) to use on UTM (M1 Pro), I tried this:

make localmodconfig

make LLVM=1 -j 4

sudo make modules_install
sudo make install
sudo grub2-mkconfig -o /boot/grub2/grub.cfg

but it doesn't work, it crashes on startup, even if you enable loglevel=7 it doesn't show the logs.

What kernel flags are needed to run Linux on UTM?
I defined CONFIG_EFI_STUB=y in my .config.

Which compression method should be used?

[XavierFilipe]

https://docs.getutm.app/guest-support/linux/

If you are building your own kernel, make sure to include the following options:

CONFIG_VIRTIO
CONFIG_VIRTIO_RING
CONFIG_VIRTIO_PCI
CONFIG_VIRTIO_BALLOON
CONFIG_VIRTIO_BLK for storage devices
CONFIG_VIRTIO_CONSOLE for console devices
CONFIG_VIRTIO_NET for networking
CONFIG_DRM_VIRTIO_GPU for graphical output
CONFIG_NET_9P, CONFIG_NET_9P_VIRTIO, CONFIG_9P_FS, CONFIG_9P_FS_POSIX_ACL for VirtFS directory sharing
CONFIG_VIRTIO_FS for VirtioFS directory sharing

this worked for me.