[Bug 2143831] [NEW] linux-*: please enable CONFIG_KEXEC_HANDOVER and CONFIG_LIVEUPDATE

Public bug reported:

Please consider setting:

CONFIG_KEXEC_HANDOVER=y
CONFIG_LIVEUPDATE=y

KHO and LUO are new features available on amd64/arm64 that allow seleced
runtime state to survive a kexec reboot, added in v6.19.

One of the main use cases is letting VMMs quickly resume guests by
having their memory transition from one kernel to the next, but there
are many others planned, so enable the features at build time.

The feature is disabled at runtime by default unless the cmdline kho=on
is specified, so risk for general purpose usage should be very minimal.

https://docs.kernel.org/next/core-api/kho/index.html
https://docs.kernel.org/next/core-api/liveupdate.html

** Affects: linux (Ubuntu)
Importance: Undecided
Status: New

** Affects: linux-kvm (Ubuntu)
Importance: Undecided
Status: New

** Affects: linux-meta-azure (Ubuntu)
Importance: Undecided
Status: New

** Affects: linux-meta-kvm (Ubuntu)
Importance: Undecided
Status: New

** Affects: linux (Ubuntu Resolute)
Importance: Undecided
Status: New

** Affects: linux-kvm (Ubuntu Resolute)
Importance: Undecided
Status: New

** Affects: linux-meta-azure (Ubuntu Resolute)
Importance: Undecided
Status: New

** Affects: linux-meta-kvm (Ubuntu Resolute)
Importance: Undecided
Status: New

** Also affects: linux (Ubuntu Resolute)
Importance: Undecided
Status: New

** Also affects: linux-kvm (Ubuntu)
Importance: Undecided
Status: New

** Also affects: linux-meta-azure (Ubuntu)
Importance: Undecided
Status: New

** Also affects: linux-meta-kvm (Ubuntu)
Importance: Undecided
Status: New

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https://bugs.launchpad.net/bugs/2143831

Title:
linux-*: please enable CONFIG_KEXEC_HANDOVER and CONFIG_LIVEUPDATE

Status in linux package in Ubuntu:
New
Status in linux-kvm package in Ubuntu:
New
Status in linux-meta-azure package in Ubuntu:
New
Status in linux-meta-kvm package in Ubuntu:
New
Status in linux source package in Resolute:
New
Status in linux-kvm source package in Resolute:
New
Status in linux-meta-azure source package in Resolute:
New
Status in linux-meta-kvm source package in Resolute:
New

Bug description:
Please consider setting:

CONFIG_KEXEC_HANDOVER=y
CONFIG_LIVEUPDATE=y

KHO and LUO are new features available on amd64/arm64 that allow
seleced runtime state to survive a kexec reboot, added in v6.19.

One of the main use cases is letting VMMs quickly resume guests by
having their memory transition from one kernel to the next, but there
are many others planned, so enable the features at build time.

The feature is disabled at runtime by default unless the cmdline
kho=on is specified, so risk for general purpose usage should be very
minimal.

https://docs.kernel.org/next/core-api/kho/index.html
https://docs.kernel.org/next/core-api/liveupdate.html

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