[SRU][Q][PATCH 0/1] kernel crash on bootup for some arm64 machines (LP: #2129770)

[Edoardo Canepa]

BugLink: https://bugs.launchpad.net/bugs/2129770

[ Impact ]

Questing generic kernel will fail to boot on some arm64 machines.

[ Fix ]

Cherry pick upstream commit c35dd838666d47d ("KVM: arm64: Guard PMSCR_EL1
initialization with SPE presence check").

[ Test Plan ]

Compile and boot tested

[ Where problems could occur ]

This commit touches ARM_SPE, so tools utilizing this feature could show
undefined behavior.