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On 02/22/2017 05:07 PM, i1w5d7gf38keg@tutanota.com wrote:

There is a Filter to stop booting when the CPUID is not in a list of
supported CPUs. This filter does not make sense in the real world usage.
For example socket 775:
When you enter a working cpu, then it boots. In some cases the coreboot
code didnt work with a CPU where it should. For example some Pentium-4
CPUs. Then it crashes even before raminit.
But when you add a CPU that "would" work but is not listed in the CPUID
lists from coreboot, the machine didnt boot. If you simply add the CPUID
to the list everything works fine.

In short: The only thing this CPUID list is doing is blocking
functionality and adding work (a list that have to be maintained).
Nothing else. If a CPU is not supported, it crashes after 4-5 lines of
logfile - even before the raminit. Thats before this CPUID list is been
checked.

Please remove those CPUID lists.

I would recommend the lists be retained. Presumably the individual(s)
that wrote the CPU / northbridge support code are aware of the CPUs that
the code is designed to work with, and using CPUs that were never
intended with that code does entail a certain amount of risk.
Individuals capable of mitigating this risk / verifying processor
functionality are also capable of modifying the CPUID list.

- --
Timothy Pearson
Raptor Engineering
+1 (415) 727-8645 (direct line)
+1 (512) 690-0200 (switchboard)
https://www.raptorengineering.com
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