Snippet when booting with OpenSBI (which supports v0.2):
```
WARNING: WITNESS option enabled, expect reduced performance.
Preloaded elf64 kernel "kernel" at 0xffffffc0007cfb20.
SBI: OpenSBI v0.5
SBI Specification Version: 0.2
CPU(0): Unknown Implementer Unknown Processor
```
Booting with bbl:
```
WARNING: WITNESS option enabled, expect reduced performance.
Preloaded elf64 kernel "kernel" at 0xffffffc0007cfb20.
SBI: Unknown (Legacy) Implementation
SBI Specification Version: 0.1
CPU(0): Unknown Implementer Unknown Processor
```