Re: Fwd: PROBLEM: tpm_cpg can't request region with AMD/Dell fTPM
On Sat, Aug 11, 2018 at 5:42 AM, Tomas Winkler wrote: > What platform is this? This is not regular 0xfed4 address space. I > guess this is BYT or CHT. It's better to get dmideoce dump as well. Hello Tomas, Jarkko, all, I'm not sure what's up with that. I've updated the firmware to the latest version (with no fix, sadly), and re-dumped the ACPI tables. They now process correctly through isl v20180629. I've also saved the output of dmidecode for you. https://gist.github.com/hlieberman-gov/83fa708d41051bafccc553cf0147db4f Sincerely, -- Harlan Lieberman-Berg Defense Digital Service
nvs.c: Inappropriately maps TPM space on Dell Inspiron 11 3000
Hello maintainers, Crossing over from a thread in linux-integrity (), the fTPM on the Dell Inspiron 11 3000 reports its TPM registers inside ACPI NV space. This causes the TPM to fail to run as the address space has already been mapped by acpi/nvs.c prior to the TPM driver loading. In discussion with Jarkko and mjg, as well as contacts with the manufacturer, this appears to something that Linux should support, despite being arguably broken. Because the fTPM is part of the ODM BIOS, this isn't something that can realistically be fixed through firmware updates; it's going to be scattered across many different devices and many different manufacturers -- and because Windows already works around this particular brain-damage, there's not as much leverage that can be applied. The full ACPI dump and the output of dmidecode can be found at https://gist.github.com/hlieberman-gov/83fa708d41051bafccc553cf0147db4f. I have machines that are set-aside for testing, running both Windows 10 and Debian sid, and I'm happy to help test possible fixes. Sincerely, -- Harlan Lieberman-Berg Defense Digital Service
Re: Fwd: PROBLEM: tpm_cpg can't request region with AMD/Dell fTPM
Hello all, Just wanted to give you a quick update now that I got my hands on an OEM Windows version of the same machine. I can confirm that Windows is able to use the TPM to some extent; confirmation and some of the output of some of the TPM Powershell cmdlets is at https://gist.github.com/hlieberman-gov/915fda005e3297570e9e6e68e1708bc6 Sincerely, -- Harlan Lieberman-Berg Defense Digital Service
