[S] Change in coreboot[main]: cpu/intel/model_206ax: Allow turbo boost ratio limit configuration

[Anastasios Koutian (Code Review)]

Anastasios Koutian has posted comments on this change by Anastasios Koutian. ( https://review.coreboot.org/c/coreboot/+/83271?usp=email )

Change subject: cpu/intel/model_206ax: Allow turbo boost ratio limit configuration
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Patch Set 8:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/83271/comment/166666fb_951365d9?usp... :
PS8, Line 8:
> Can you elaborate?

Test 1: Set 1-core turbo ratio limit to 41x in devicetree. Compile and flash. `$ rdmsr 0x1ad` returns 0x0000000025252629 => turbo ratio limits are 37x/37x/38x/41x.
Test 2: Set 3-core turbo ratio limit to 41x in devicetree. Compile and flash. `$ rdmsr 0x1ad` returns 0x0000000025292627 => turbo ratio limits are 37x/41x/38x/39x.
Test 3: Set all turbo ratio limits to 41x in devicetree. Compile and flash. `$ rdmsr 0x1ad` returns 0x0000000029292929 => turbo ratio limits are 41x/41x/41x/41x

Also used Intel PCM to confirm single-core clock reaches 4.1 GHz under load.