You posted the same message on the libvirt-user list, which would have been sufficient for this query. For the record, it was answered there https://www.redhat.com/archives/libvirt-users/2020-January/msg00003.html Regards, Jim On 12/30/19 8:30 AM, Arthur Borsboom wrote:

Hello,

I am trying to get TPM 2.0 pass through to work with Xen and libvirt, but I can't get it to work. According to the following sites both Xen and libirt have TPM 2.0 support.

https://wiki.xen.org/wiki/Virtual_Trusted_Platform_Module_(vTPM) https://libvirt.org/formatdomain.html#elementsTpm

However, when I add a TPM device to a VM (by virt-manager), the VM guest XML does contain the TPM configuration, but the VM guest (linux) does not show any TPM device. Also, when looking in /var/log/libvirt/libxl/vmguest.log there is no mention of tpm in the (converted libvirt XML to libxl) vm structure.

Is this because libvirt only supports TPM with QEMU? If so, are there any development plans for TPM support with XEN? Is there a workaround for the time being?

Best regards, Arthur Borsboom.

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