Issue #637 has been updated by Patrick Rudolph.
Likely yes, but BIOS_RESET_CPL can only be set after several MSRs / registers have been written, so enabling it earlier is not possible. ---------------------------------------- Bug #637: Sandybridge: C-States and Turbo not working in coreboot https://ticket.coreboot.org/issues/637#change-2265 * Author: Patrick Rudolph * Status: New * Priority: Normal * Category: chipset configuration * Target version: none * Start date: 2026-04-06 ---------------------------------------- Observations showed that in coreboot: - C-States are not working (asm("mwait"); has no effect) - Turbo states (core above P0 frequency) aren't working The P-state can be changed after BIOS_RESET_CPL, but it never goes into turbo mode. On Linux both are working fine. It would be nice to have both fixed as turbo states could reduce boot time when extracting the LZMA payload. Tests show that around 20msec of boottime improvements are possible, just for extracting the LZMA payload. Tested version: 654f32847428f36c92c19932bdfec9f3510bf384 -- You have received this notification because you have either subscribed to it, or are involved in it. To change your notification preferences, please click here: https://ticket.coreboot.org/my/account _______________________________________________ coreboot mailing list -- [email protected] To unsubscribe send an email to [email protected]
