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[Qemu-devel] [Bug 1615823] Re: Windows 10 reports no compatible TPM foun
From: |
Nelson Chan |
Subject: |
[Qemu-devel] [Bug 1615823] Re: Windows 10 reports no compatible TPM found yet device manager shows it? |
Date: |
Mon, 11 Sep 2017 20:23:06 -0000 |
My laptop has a TPM 1.2 chip made by IFX (dmesg: tpm_tis 00:07: 1.2 TPM
(device-id 0x1B, rev-id 16))
I couldn't get it to work in libvirt (I am running ubuntu 17.04) until I
upgraded my Windows 10 to version 1607. I needed to change the CPU to
"core2duo" first before I could apply the version 1607 patch (if you
don't do that, you can never apply the patch). After applying this
Windows patch, Windows can detect and use the TPM device assigned to it
successfully.
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https://bugs.launchpad.net/bugs/1615823
Title:
Windows 10 reports no compatible TPM found yet device manager shows
it?
Status in QEMU:
New
Bug description:
Ubuntu 16.04 with stock kvm, libvirt, ovmf
Qemu 2.5 installed from stock ubuntu ppa
Qemu 2.6.1 built from tarball.
Qemu 2.7.0-rc4 built from tarball.
Windows 10 guest reports a TPM device is installed and the driver
functional under Device Manager-->Security Devices. TPM Administrator
however advises no compatible TPM chip can be found.
Qemu 2.5 is buggy and prevents the guest loading the TPM driver, this
was addressed by
http://git.qemu.org/?p=qemu.git;a=commit;h=2b1c2e8e5f1990f0a201a8cbf9d366fca60f4aa8
Have tested the below cmd out on both qemu-2.6.1 and qemu-2.7.0-rc4,
both suffer the same problem. My TPM is most certainly compatible as
installing Win10Pro onto the same host as bare metal provides me the
desired and expected functionality aka Bitlocker and TPM Administrator
work.
sudo ./qemu-system-x86_64 \
-enable-kvm \
-machine q35 \
-cpu host \
-m 4096 \
-smp 4,sockets=1,cores=2,threads=2 \
-device i82801b11-bridge,id=pci.1,bus=pcie.0,addr=0x1e \
-device pci-bridge,chassis_nr=2,id=pci.2,bus=pci.1,addr=0x1 \
-device
qxl-vga,id=video0,ram_size=67108864,vram_size=67108864,vgamem_mb=16,bus=pcie.0,addr=0x2
\
-drive file=/usr/share/qemu/OVMF.fd,if=pflash,format=raw,unit=0,readonly=on \
-drive file=/mnt/120GB_SSD/wintpm_VARS.fd,if=pflash,format=raw,unit=1 \
-drive
file=/mnt/120GB_SSD/wintpm.qcow2,format=qcow2,if=none,id=drive-virtio-disk0 \
-device
virtio-blk-pci,scsi=off,bus=pci.2,addr=0x3,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=2
\
-drive file="/mnt/share/Filestorage/Images/Microsoft Windows 10 Pro
x64.iso",format=raw,if=none,media=cdrom,id=drive-sata0-0-0,readonly=on \
-device ide-cd,bus=ide.0,drive=drive-sata0-0-0,id=sata0-0-0 \
-drive
file=/mnt/share/Filestorage/Images/virtio-win-0.1.117.iso,format=raw,if=none,media=cdrom,id=drive-sata0-0-1,readonly=on
\
-device ide-cd,bus=ide.1,drive=drive-sata0-0-1,id=sata0-0-1 \
-tpmdev
passthrough,id=tpm-tpm0,path=/dev/tpm0,cancel-path=/sys/class/tpm/tpm0/device/cancel
\
-device tpm-tis,tpmdev=tpm-tpm0,id=tpm0
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