Public bug reported: arm64 is currently the only kernel architecture that does not support self-compressed kernel images, instead it states that "external" things should decompress the kernel image if it is so desired.
this hinders adoption of arm64, reduces feature parity with other architectures, and makes it harder to have optimal kernels on arm64. For example: - sd-boot stub as used in Ubuntu Core does not support uncompressing .vmlinuz section in https://systemd.io/BOOT_LOADER_SPECIFICATION/ type 2 binary - firmware on RaspberryPi doesn't support compressed kernel images, or only supports a subset of compression algorithms - vmlinuz can be booted directly as an EFI app which also doesn't support compression, or doesn't support all compression algorithms It would be extremely nice to be able to compress vmlinuz on arm64 with modern compression algorithms (zstd, lz4, xz) and be able to boot them the same way one can boot armhf / x86_64 kernels in EFI contexts. ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1968320 Title: Please support self-compressed kernel images on arm64 Status in linux package in Ubuntu: New Bug description: arm64 is currently the only kernel architecture that does not support self-compressed kernel images, instead it states that "external" things should decompress the kernel image if it is so desired. this hinders adoption of arm64, reduces feature parity with other architectures, and makes it harder to have optimal kernels on arm64. For example: - sd-boot stub as used in Ubuntu Core does not support uncompressing .vmlinuz section in https://systemd.io/BOOT_LOADER_SPECIFICATION/ type 2 binary - firmware on RaspberryPi doesn't support compressed kernel images, or only supports a subset of compression algorithms - vmlinuz can be booted directly as an EFI app which also doesn't support compression, or doesn't support all compression algorithms It would be extremely nice to be able to compress vmlinuz on arm64 with modern compression algorithms (zstd, lz4, xz) and be able to boot them the same way one can boot armhf / x86_64 kernels in EFI contexts. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1968320/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
