i7z works incorrectly if UEFI Secure Boot enabled about i7z HOT 6 OPEN

Is there no other way around it, e.g. patching something minor in the i7z code?
Why do you have to write to read CPU frequency, actually?

It configures the performance counters, writing to IA32_PERF_GLOBAL_CTRL and IA32_FIXED_CTR_CTL - the former is probably a no-op but the latter is needed. I haven't quite figured out how it gets the values as the code is a bit convoluted to say the least but it definitely doesn't work if it can't write to IA32_FIXED_CTR_CTL

The code is all a bit of a mess anyway, no CPU newer than about 2015 is correctly detected and I suspect coverage before that is not 100%, it doesn't understand CPUs with more than 6 cores for reporting max turbo boost multipliers, there's loads of dead code just left but commented out. Needs a thorough clean up.

from i7z.

Hi,
do you solve this?

from i7z.

Did you try the custom msr-module?
https://github.com/intel/intel-cmt-cat/wiki/UEFI-Secure-Boot-Compatibility

from i7z.

Is there no other way around it, e.g. patching something minor in the i7z code? Why do you have to write to read CPU frequency, actually?

from i7z.

Probably there is nothing easier than this:
https://github.com/KastB/msr_no_lockdown

from i7z.

I have faced the problem when I disabled vmd on my Asus laptop.
it was working fine while vmd was active
(I've changed vmd status in Bios)

from i7z.