#yocto on 2022-09-10 — irc logs at libera.irclog.whitequark.org

2022-04-06 11:28 ndec changed the topic of #yocto to: "Welcome to the Yocto Project | Learn more: https://www.yoctoproject.org | Join us or Speak at Yocto Project Summit (2022.05) May 17 - 19, more: https://yoctoproject.org/summit | Join the community: https://www.yoctoproject.org/community | IRC logs available at https://www.yoctoproject.org/irc/ | Having difficulty on the list or with someone on the list, contact YP community mgr ndec"

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09:25 <dwagenk> Trick question: anyone know how to use runqemu e.g. for the qemux86-64 machine with an emulated TPM??

09:25 <dwagenk> https://git.yoctoproject.org/poky/tree/meta/recipes-devtools/qemu/qemu/0002-chardev-connect-socket-to-a-spawned-command.patch#n27

09:25 <dwagenk> I spent some time figuring it out how to do it manually with swtpm, patched runqemu to also support it and only afterwards found a path to qemu in the poky repo that adds support for running a command before starting the emulation that describes how to use it for an emulated TPM in the patch message.

09:38 <mrybczyn[m]> dwagenk: search for the meta-ledge-secure layer. They do exactly that. There's s need of qemu configuration file.

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09:59 <dwagenk> <mrybczyn[m]> "dwagenk: search for the meta-..." <- From what I see they have the arm secure world in qemu and that provides a TPM `QB_MACHINE = "-machine virt,secure=on"`.

09:59 <dwagenk> I've got a x86-64 device and corresponding qemu config. That seems to be different in that the qemu machine doesn't provide a TPM, but a virtual one can be attached to it via sockets.

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10:01 <dwagenk> Nevertheless that layer is a good inspiration, thanks for the tipp! Their modifications to build wic images with direct loading of the kernel (no grub or systemdboot) implements what I've got planned as my next todo...

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10:26 <PhoenixMage> Can I create a bbappend for a kernel bb file to add a COMPATIBLE_MACHINE?

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10:50 <mrybczyn[m]> dwagenk: they had it at some point for x86 too. Le me search in other repositories. I know that it was working for x86 too

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