Hi Martin, On Sun, Aug 13, 2023 at 11:27:57AM +0100, Martin Johnson wrote: > 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
After picking the fix from upstream into unstable, this is as well pending for bookworm and will land latest on the 12.2 point release. Regards, Salvatore
