** Attachment added: "Ubuntu ppc64el kernel config for 5.10"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1904906/+attachment/5436110/+files/ppc64el-config.flavour.generic-5.10

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https://bugs.launchpad.net/bugs/1904906

Title:
  5.10 kernel fails to boot with secure boot disabled

Status in The Ubuntu-power-systems project:
  New
Status in linux package in Ubuntu:
  New

Bug description:
  Canonical requests to test the secure boot for the 5.10 kernel but
  kernel fails to boot with secure boot disabled.

  The 5.10 kernel can be found in:
  https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/bootstrap

  They can be installed by installing the linux-generic-wip package with
  this PPA enabled. As usual, they are only signed using a key specific to
  that PPA. This key can be retrieved from the signing tarballs for the
  kernels, e.g.:

  http://ppa.launchpad.net/canonical-kernel-
  
team/bootstrap/ubuntu/dists/hirsute/main/signed/linux-5.10-ppc64el/5.10.0-2.3/signed.tar.gz

  Our tester installed the 5.10 kernel via aptitude.
  If booting directly from the bootmenu, it stucks at:
  "kexec_core: Starting new kernel"

  If booting recovery kernel for 5.10.0, it proceeds farther and after 
kexec_core, it failed at: 
  "
  [    0.029830] LSM: Security Framework initializing
  [    0.029916] Yama: b
  "

  Two attempts with a different scenario; running with 5.8 kernel and boot via 
commandline for 5.10:
  kexec -l /boot/vmlinux-5.10.0-0-generic 
--initrd=/boot/initrd.img-5.10.0-0-generic 
--append="root=UUID=49d000cb-dba2-4d70-809e-38f2b31d0f09 ro quiet splash"
  kexec -e

  Both attempts also failed while rebooting, once with the same error as
  the error from booting with bootmenu; the other failure occurred a lot
  earlier.

  Wondering what new CONFIGs and/or features for the 5.10 kernel?

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