[SeaBIOS] vTPM 2.0 is recognized as vTPM 1.2 on the Win 10 virtual machine with seabios

[Marc-André Lureau]

Hi

On Thu, Aug 23, 2018 at 9:29 AM 汤福 <tangfu at gohighsec.com> wrote:
>
> Hi，
>    I am sorry, I bothered you. Still vTPM 2.0 for win 10 problem， I downloaded the latest qemu source from git, the version is V3.0.50. I think this is the latest code of qemu upstream. I also downloaded seabios upstream and bulid it with tpm2 support.  Unfortunately, I tried both passthrough and emulator, and I didn’t get the expected results.
>
>    For emulator， I did it like this：
>    #mkdir /tmp/mytpm2/
>    #chown tss:root /tmp/mytpm2
>    #swtpm_setup --tpmstate /tmp/mytpm2 --create-ek-cert --create-platform-cert --allow-signing --tpm2
>    #swtpm socket --tpmstate dir=/tmp/mytpm2   --ctrl type=unixio,path=/tmp/mytpm2/swtpm-sock   --log level=20 --tpm2
>
>    No errors occurred, suggesting that the certificate was also generated successfully.Then I created a blank img file named win10.img，and install win10  virtual machine as follows：
>    #qemu-system-x86_64 -display sdl -enable-kvm -cdrom win10.iso -serial stdio -m 2048 -boot d -bios bios.bin   -boot menu=on  -chardev socket,id=chrtpm,path=/tmp/mytpm2/swtpm-sock -tpmdev emulator,id=tpm0,chardev=chrtpm -device tpm-crb,tpmdev=tpm0 win10-ovmf.img
>    Enter the system when the system is successfully installed，I found that the TPM 2.0 device was not found in the System Device Manager. If I replace -device tpm-crb with -device tpm-tis and reboot the system，The TPM device can be found in the device manager.But the vTPM 2.0 is recognized as vTPM 1.2.
>
>    I also tried passthrough mode， The result is the same as emulator. So, what could be the problem?
>

Try with OVMF. According to some technical docs, it seems Windows
requires UEFI & CRB for TPM 2. That's also what testing suggestsTry.
We are able to pass most WLK TPM tests with this setup.

>
>
> > -----原始邮件-----
> > 发件人: "Kevin O'Connor" <kevin at koconnor.net>
> > 发送时间: 2018-08-21 12:08:59 (星期二)
> > 收件人: "汤福" <tangfu at gohighsec.com>
> > 抄送: seabios at seabios.org
> > 主题: Re: [SeaBIOS] vTPM 2.0 is recognized as vTPM 1.2 on the Win 10 virtual machine with seabios
> >
> > On Mon, Aug 13, 2018 at 04:45:43PM +0800, 汤福 wrote:
> > > Hi,
> > >
> > > I want to use the vTPM in a qemu Windows image. Unfortunately, it didn't work.
> > > First, the equipment:
> > > TPM 2.0 hardware
> > > CentOS 7.2
> > > Qemu v2.10.2
> > > SeaBIOS 1.11.0
> > > libtpm and so on
> >
> > If you retry with the latest SeaBIOS code from the master branch, does
> > the problem still exist?
> >
> > See:
> > https://mail.coreboot.org/pipermail/seabios/2018-August/012384.html
> >
> > -Kevin
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-- 
Marc-André Lureau