[Bug 2073554] Re: Grub2 Support for KVM on PowerVM

[Frank Heimes]

Hi Mate, this is for Power10 systems.
For P10 systems, IBM's commercial hypervisor PowerVM was mandatory.
Just recently nested KVM on P10 was introduced (so KVM on top of PowerVM).
And this patch adds Radix support (and more) - without Radix any PowerVM KVM LPARs will fail to boot with grub.
(That's my understanding, also from the referenced mail thread.)

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https://bugs.launchpad.net/bugs/2073554

Title:
  Grub2 Support for KVM on PowerVM

Status in The Ubuntu-power-systems project:
  New
Status in grub2 package in Ubuntu:
  New

Bug description:
  AVNISH CHOUHAN 2024-06-24 05:57:01 CDT

  We have added required changes in grub2 to support KVM on Power. The
  patch is available in upstream grub. This patch adds support for
  Radix, Xive and Radix_gtse in Options vector5 which is required for
  KVM LPARs. KVM LPARs ONLY support Radix and not the Hash. Not enabling
  Radix on any PowerVM KVM LPARs will result in boot failure.

  https://lists.gnu.org/archive/html/grub-devel/2024-05/msg00209.html

  [reply] [?] Internal OnlyComment 3AVNISH CHOUHAN 2024-07-01 05:19:38 CDT
  Hi,

  Upstream commit :
  https://git.savannah.gnu.org/cgit/grub.git/commit/?id=fa36f6376087b81a4de05623a5cd871a8fa30b35

  Thank you,
  Avnish Chouhan

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