V2.2.0 work

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 70.93023% with 25 lines in your changes missing coverage. Please review.

Project coverage is 64.68%. Comparing base (00ed5d2) to head (66f3e41). Report is 9 commits behind head on master.

Files	Patch %	Lines
src/cm/cm_main.c	79.68%	13 Missing :warning:
src/drivers/virtio/virtio_serial.c	45.45%	12 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #43 +/- ## ========================================== - Coverage 64.75% 64.68% -0.08% ========================================== Files 58 58 Lines 2846 2891 +45 ========================================== + Hits 1843 1870 +27 - Misses 1003 1021 +18 ```

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