[PATCH 0/1][jammy/kinetic linux] Resolve synchronous exception on arm64

[Tim Gardner]

BugLink: https://bugs.launchpad.net/bugs/2023311

SRU Justification

[Impact]

MSFT has requested the inclusion of commit e8dfdf3162eb549d064b8c10b1564f7e8ee82591 ('arm64:
efi: Recover from synchronous exceptions occurring in firmware'). It looks generic enough to
apply to the master kernels.

Unlike x86, which has machinery to deal with page faults that occur during the execution of
EFI runtime services, arm64 has nothing like that, and a synchronous exception raised by
firmware code brings down the whole system.

[Test Plan]

This looks like a hard one to reproduce. Boot and regression testing should be sufficient.

[Regression Potential]

Firmware exceptions could still take down the system.

[Other Info]

SF: #00362062