Package: linux-image Version: 6.1.0-11-amd64
When latest Debian kernel is installed it is causing a problem with KVM virtual machine and the current version of QEMU on Bookworm. This is when swtpm is used to provide an emulated TPM for the guest OS. The guest OS is windows 11. swtpm does not receive commands from the host OS, something has been broken in KVM side I suspect this could be caused by recent CPU security patches or patches to KVM itself.
The guest OS reports a code 10 on the TPM driver, and the TPM device is unusable. Trying a slightly older kernel the TPM is working as expected.
I also noticed the same issue with vanilla kernels built from kernel.org for example kernel-6.1.44 and kernel-6.1.45 has this issue and kernel 6.1.42 does not. So its some recent patch is likely causing it.
I have two AMD64 machines with Ryzen processors and both exhibit this issue, I hope that it should be easily reproducible with a Ryzen CPU.
One Machine has this CPU: AMD Ryzen 9 3950X 16-Core Processor The other machine has this CPU: AMD Ryzen 7 1800X 8-Core Processor Kind Regards, Martin Johnson.
