Hello, thanks for your contribution. Is there any chance to have the option to disable efficient or performance cores in the next firmware, for example on NovaCustom NV41 laptop? I also saw another way to disable efficient or performance cores without needing to reboot, using taskset but I did not try it yet: https://unix.stackexchange.com/questions/686459/disable-intel-alder-lake-eff... The option in the BIOS could still be useful to have a default configuration.
On Sat, 18 Mar 2023 at 06:01, Felix Singer felixsinger@posteo.net wrote:
Hi everybody,
I have created a patch which adds Kconfig and runtime options for both of these settings.
https://review.coreboot.org/c/coreboot/+/73790
Let me know your opinion.
Felix
On Thu, 2023-03-02 at 11:27 +0100, Michał Żygowski wrote:
On 1.03.2023 18:58, baptx wrote:
For people who use the 12th generation of Intel Core processors, they may want to disable efficient-cores in the BIOS to improve performance ( https://www.reddit.com/r/intel/comments/thp7jh/disabling_the_efficie ncy_cores_to_get_performance/ < https://www.reddit.com/r/intel/comments/thp7jh/disabling_the_effici ency_cores_to_get_performance/>), is it supported by coreboot or Dasharo?
Some people may also want to disable performance-cores instead to save more battery ( https://www.reddit.com/r/overclocking/comments/x0xu1c/can_you_disabl e_performance_cores_to_force_an/ < https://www.reddit.com/r/overclocking/comments/x0xu1c/can_you_disab le_performance_cores_to_force_an/>), is it supported also?
Intel FSP, which is used to initialize the Intel silicon in coreboot is capable of disabling E and P cores. It is a matter of telling FSP to do it. But I assume you expect a runtime option in the firmware setup, so the answer is no, neither Dasharo nor coreboot supports it at the moment. Currently, the only way to achieve it is a custom coreboot build.
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