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readme: Add note about state of IME

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Tim Crawford 2020-07-14 09:59:22 -06:00 committed by Jeremy Soller
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10
README.md
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@ -103,6 +103,16 @@ cd firmware
SPIPI=<user@spipi> ./scripts/spipi-flash.sh <model>
```
## Intel Management Engine
The IME is present, but disabled. This is accomplished by [sending a HECI
command on boot][heci_disable], before RAM is initalized. This puts the IME in
a state similar to setting the HAP bit on earlier platforms. [me_cleaner] is
not used as it does not support IME version 14.0.
[heci_disable]: https://github.com/system76/coreboot/blob/f3ba5937e778105cb7e75de9a1d4adf54ea825e5/src/soc/intel/cannonlake/me.c#L186
[me_cleaner]:https://github.com/corna/me_cleaner
## Contents
- [apps](./apps) - Applications

10
README.md.in
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@ -102,3 +102,13 @@ cd firmware
```
SPIPI=<user@spipi> ./scripts/spipi-flash.sh <model>
```
## Intel Management Engine
The IME is present, but disabled. This is accomplished by [sending a HECI
command on boot][heci_disable], before RAM is initalized. This puts the IME in
a state similar to setting the HAP bit on earlier platforms. [me_cleaner] is
not used as it does not support IME version 14.0.
[heci_disable]: https://github.com/system76/coreboot/blob/f3ba5937e778105cb7e75de9a1d4adf54ea825e5/src/soc/intel/cannonlake/me.c#L186
[me_cleaner]:https://github.com/corna/me_cleaner