From: Serge E. Hallyn <serge(a)hallyn.com>
Sent: Wednesday, October 14, 2020 10:58 AM
To: Roberts, William C <william.c.roberts(a)intel.com>
Cc: tpm2(a)lists.01.org; ryaharpe(a)cisco.com; scmoser(a)cisco.com; linux-
Subject: Re: QUEMU and TPM2 device emulation
On Wed, Oct 14, 2020 at 03:27:53PM +0000, Roberts, William C wrote:
> Has anyone ever setup a QUEMU instance with a virtualized TPM? I need
> to try and replicate an issue with the in-kernel Resource manager. My goal is to
use the integrated QUEMU support To bring up an emulated TPM device and it's
associated RM node @ /dev/tpmrm0.
> I am looking at:
> Which shows this command:
> qemu-system-x86_64 -display sdl -enable-kvm \
> -m 1024 -boot d -bios bios-256k.bin -boot menu=on \
> -chardev socket,id=chrtpm,path=/tmp/mytpm1/swtpm-sock \
> -tpmdev emulator,id=tpm0,chardev=chrtpm \
> -device tpm-tis,tpmdev=tpm0 test.img
> #> dmesg | grep -i tpm
> [ 0.711310] tpm_tis 00:06: 1.2 TPM (device=id 0x1, rev-id 1)
> I have a few questions around this that I cannot seem to dig up any
> 1. How to specify TPM2.0 device? The project
seems to indicate it would be
> 2. Does anyone know the minimum QUEMU version for this support? I
> looked in the CHANGELOG here, https://wiki.qemu.org/ChangeLog
version 2.8 to 5.2 and never saw anything Call out TPM 2.0 specifically.
2.11 should suffice.
> 3. Does anyone have or know of better documentation to set this up? If their
isn't better documentation, should we (read I) create it? This seems like a pretty
I'm not sure how relevant this is any more, but I did this about two years ago and
documented it at https://s3hh.wordpress.com/2018/06/03/tpm-2-0-in-qemu/
Thanks, yeah I stumbled into this, it was super helpful. I got it working and posted back
With my commands.