Emulated TPM devices and snapshots of running VMs

[Milan Zamazal]

Milan Zamazal <mzamazal at redhat.com> writes:

> Hi,
>
> I would like to clarify how to make snapshots of running VMs with
> emulated TPM devices.  As far as I understand QEMU documentation, it's
> possible to make snapshots of running VMs with TPM, but it's important
> to retain the state of swtpm.  Does libvirt assist with that in any way
> or is it completely user's responsibility?  libvirt pauses the VM
> internally when making a snapshot, which should be the right moment to
> copy the swtpm data, but the user doesn't have control over it.  Is
> there a way to make a copy of swtpm data that is guaranteed to be
> consistent with the snapshot?

No idea?

> Thank you,
> Milan