introduce basic telemetry #6244
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| model | device_test | click_test | persistence_test |
|---|---|---|---|
| T2T1 |  test(all)  main(all)  |
 test(all)  main(all)  |
 test(all)  main(all)  |
| T3B1 |  test(all)  main(all)  |
 test(all)  main(all)  |
 test(all)  main(all)  |
| T3T1 |  test(all)  main(all)  |
 test(all)  main(all)  |
 test(all)  main(all)  |
| T3W1 |  test(all)  main(all)  |
 test(all)  main(all)  |
 test(all)  main(all)  |
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[no changelog]
…up RAM [no changelog]
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TychoVrahe
requested review from
cepetr and
kopecdav
and removed request for
matejcik,
obrusvit and
romanz
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This PR introduces basic telemetry for trezor devices.
Telemetry data is stored in backup ram, so with caveat that total battery loss or disconnection causes data loss, which is deemed acceptable.
To prevent unauthorized modification of the data, we limit kernel access to backup ram to only allow modification of specified records. Other records, like telemetry, can only be modified through designated smcalls.
Prodtest is modified to not contain functions for modifying backup ram data directly (in production=1 setting).
Finally, to prevent unauthorized modification through downgrading the FW, secmon downgrade protection is introduced, and monotonic versions are bumped so that no downgrades below this version is possible.