Date: Sat, 3 Feb 2024 17:19:06 +0100 From: Andrea Cocito <andrea@cocito.eu> To: freebsd-hackers@freebsd.org Subject: TPM2 on AMD Rizen (fTPM) Message-ID: <E9C7F151-4948-4C59-A0A0-594E9F377189@cocito.eu>
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Hi, I’m trying to enable TPM support on a box in order to experiment a bit with it, but the driver does not seem to load and/or see the device. In the firmware the “fTPM” option has been enabled, tried both with SCM enabled and disabled, basically I tried all the possible firmware options combinations with no success. I have tpm_load=“YES” in /boot/loader.conf and also tried the hints suggested by the man page is /boot/device.hints No way to have the tpm? device(s) appear, the best I achieved so far on dmesg in a verbose boot is: … Preloaded elf obj module "/boot/kernel.old/geom_mirror.ko" at 0xffffffff8196d8c0. Preloaded elf obj module "/boot/kernel.old/tpm.ko" at 0xffffffff8196dfb0. … tpm0 failed to probe at iomem 0xfffffffffed40000-0xfffffffffed44fff on isa0 tpm1 failed to probe at iomem 0xfffffffffed40000-0xfffffffffed40fff on isa0 … I am all but an expert about TPM architecture (this is why I am willing to play with it), but as far as I understand AMD’s fTPM is a TPM2 built into the CPU, I have no idea on which bus it should be seen and how. So my questions are: - Is AMD’s fTPM supported at all by the driver? - Am I missing something very obvious? I have been digging around for information quite a bit, but there does not seem to be much information around. Hope I am hitting the correct list (accept my apologies if it is not). Thanks in advance for any advice.
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