Issue #576 has been updated by Nicholas Chin.
Possible fix here: https://review.coreboot.org/c/coreboot/+/90884 https://review.coreboot.org/c/coreboot/+/90885 Still needs testing and verification, and extension to other affected platforms. It seems that the SBI method doesn't work on Skylake, though the PCR method does. ---------------------------------------- Bug #576: GPIO locking is broken on Kaby Lake and possibly other platforms https://ticket.coreboot.org/issues/576#change-2210 * Author: Mate Kukri * Status: New * Priority: Normal * Target version: none * Start date: 2025-01-30 ---------------------------------------- Many supported Kaby Lake boards (and possibly newer platforms as well) are vulnerable to [TPM GPIO reset attacks](https://mkukri.xyz/2024/06/01/tpm-gpio-fail.html). Trying to fix this by marking the affected GPIOs as locked in gpio.h and even also selecting `SOC_INTEL_COMMON_BLOCK_SMM_LOCK_GPIO_PADS` does not work. This was discovered last year and briefly discussed on #coreboot, but it came up again on the Heads matrix group in relation to supporting the TPM on the in-progress ThinkPad T480 port. -- 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]
