Re: Enabling TPM emulation for Qemu Win10 guests

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Ulf Volmer writes:

On 12.09.21 19:21, Sam Varshavchik wrote:
If you're running a qemu VM with a Windows 10 guest (in F34) and you successfully enabled TPM emulation, I'd like to compare notes with you.

I used virt-manager to enable TPM 2.0, both TIS and CRB types:

<tpm model="tpm-tis">
<backend type="emulator" version="2.0"/>
<alias name="tpm0"/>
</tpm>

and

<tpm model="tpm-crb">
<backend type="emulator" version="2.0"/>
<alias name="tpm0"/>
</tpm>

My fully activated/licensed Windows 10 VM (21H1) refuses to recognize TPM. "Security Processor Troubleshooting" reports:

"Your device does not support this feature."

I've read multiple reports that this should work, so I must be missing something. Looking at a working qemu configuration in /etc/libvirt/qemu is the only thing I can think of.

I have a virtual 21H1 and the TPM2 device is shown in the device manager and also in the security settings (with vendor IBM). But I'm currently not using this feature on windows.

My libvirt settings are:

<tpm model='tpm-crb'>
  <backend type='emulator' version='2.0'/>
</tpm>

Well, that's what I showed what I had, above, except for the alias setting, which I can't imagine making any difference, but I'll try manually removing that.

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