New Linux Patches For AMD i2c Bus Sharing With The PSP

[phoronix]

Phoronix: New Linux Patches For AMD i2c Bus Sharing With The PSP

The newest Linux hardware support patches for the kernel revolve around i2c bus sharing support for newer SoCs where the i2c bus is being shared by AMD's Platform Security Processor (PSP). This i2c controller is based on common DesignWare IP but new kernel code is being crafted for handling that bus sharing between the kernel and the PSP co-processor...

https://www.phoronix.com/scan.php?page=news_item&px=Linux-AMD-i2c-PSP-Sharing

[OneTimeShot]

Wow - software having access to the i2c bus without physically attaching jumper cables? What could possibly go wrong?

[Termy]

Wow - software having access to the i2c bus without physically attaching jumper cables? What could possibly go wrong?

i mean, it has its usecases...but yeah, it can be a really great idea: https://gitlab.freedesktop.org/drm/amd/-/issues/1470 ^^

[gpshead]

i mean, it has its usecases...but yeah, it can be a really great idea: https://gitlab.freedesktop.org/drm/amd/-/issues/1470 ^^

Not dissimilar to sharing issues with the off-die sensor bus chips such as https://bugzilla.kernel.org/show_bug.cgi?id=204807. BIOS SMM mode wants to monitor temperatures and fan speeds as does user software as does other embedded management/security-nightmare controllers...