Comment # 21 on bug 1184924 from Fabian Vogt

(In reply to Ivan Ivanov from comment #19)
> For SLE15-SP3 CONFIG_RANDOM_TRUST_BOOTLOADER option is enabled
> only for armv7h and arm64.
> 
> For 'stable' same option is enabled for all other arches except Arm :-)
>
> If we do same tests for non-Arm arches and they are passing then
> something in arch setup code is not Ok. If we don't do these tests
> then CONFIG_RANDOM_TRUST_BOOTLOADER is broken since inception.

The issue is basically that with CONFIG_RANDOM_TRUST_BOOTLOADER=y, the
kernel crashes if both EFI and the device tree provide randomness.

That means that only platforms which use a device tree and EFI can
actually run into this issue. x86 and s390x don't use a DT, ppc doesn't
use EFI and riscv isn't being tested by openQA so far. That leaves only
ARM, but as you found out that doesn't have
CONFIG_RANDOM_TRUST_BOOTLOADER=y in TW.