[Bug 1975592] Re: Enable Nezha board

[Dimitri John Ledkov]

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https://bugs.launchpad.net/bugs/1975592

Title:
  Enable Nezha board

Status in linux-allwinner package in Ubuntu:
  Fix Released
Status in linux-riscv package in Ubuntu:
  New
Status in livecd-rootfs package in Ubuntu:
  New
Status in u-boot-nezha package in Ubuntu:
  New

Bug description:
  [Impact]
  integrate linux-allwinner patches into linux-riscv kernel

  [Test]
  * Newly built images should boot and work on both nezha and licheerv
  * Upgraded systems using old images should reboot and work on both nezha and licheerv
  * Once this migrates, mantic+ livecd-rootfs can be improved to use generic kernel

  [Implementation details]
  * linux[-image]-allwinner depends on new enough generic kernel with allwinner support pull request applied; and on an updated u-boot-nezha package

  * new enough u-boot-nezha package ensures that MMC driver is included
  in the initramfs, and triggers initramfs update at the end of the apt
  transaction

  * End result, nezha/licheerv systems switch from tracking allwinner
  kernel to tracking generic kernel with initrd that contains MMC driver
  which used to be built-in.

  [Regression potential]
  Ensure this new build of linux-riscv doesn't regress on existing supported systems (sifive & qemu)

  scope:
  linux-riscv https://lists.ubuntu.com/archives/kernel-team/2023-May/139655.html
  u-boot-nezha patch attached
  linux-meta-riscv patch attached

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