** Description changed:

- Tested on bionic GA 4.15.0-70-generic 4.15.0-71-generic
- and also HWE 5.0.0-37-generic 5.3.0-23-generic
+ [Impact]
+ 4.15.0-71-generic can not boot on several arm64 machine e.g. ThunderX2, 
Kunpeng 920 and CN88xx.
  
- Only 4.15.0-71-generic can not boot on Cavium ThunderX2
+ [Test Case]
+ Boot kernel with earlycon. See if kernel oops while booting.
  
- On console nothing after EFI messages.
- 
- Loading Linux 4.15.0-71-generic ...
- Loading initial ramdisk ...
- EFI stub: Booting Linux Kernel...
- EFI stub: EFI_RNG_PROTOCOL unavailable, no randomness supplied
- EFI stub: Using DTB from configuration table
- EFI stub: Exiting boot services and installing virtual address map...
+ [Regression Risk]
+ TBD

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https://bugs.launchpad.net/bugs/1852723

Title:
  [Regression] Bionic kernel 4.15.0-71.80 can not boot on ThunderX2

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Bionic:
  Confirmed

Bug description:
  [Impact]
  4.15.0-71-generic can not boot on several arm64 machine e.g. ThunderX2, 
Kunpeng 920 and CN88xx.

  [Test Case]
  Boot kernel with earlycon. See if kernel oops while booting.

  [Regression Risk]
  TBD

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