qemu-system-x86_64: KVM_TDX_INIT_MEM_REGION failed Input/output error

[elodj]

Describe the support request
Attempting to start up TD created via a slightly modified create-td-image.sh. (modification fixes the virt "--os-variant ubuntu24.04 missing failure by using a pre downloaded iso file")

Qemu command

$ sudo /opt/qemu-tdx/bin/qemu-system-x86_64 -accel kvm \
 -name process=tdx,debug-threads=on \
 -m 16G \
 -vga none \
 -monitor pty \
 -nodefaults \
 -drive file=./tdx-guest-ubuntu-24.04-intel.qcow2,if=virtio,format=qcow2 \
 -monitor telnet:127.0.0.1:9072,server,nowait \
 -bios ~/dev/edk2/Build/IntelTdx/DEBUG_GCC5/FV/OVMF.fd \
 -object tdx-guest,sept-ve-disable=on,id=tdx \
 -cpu host,-kvm-steal-time,pmu=off,tsc-freq=1000000000 \
 -machine q35,hpet=off,kernel_irqchip=split,memory-encryption=tdx \
 -device virtio-net-pci,netdev=mynet0 \
 -netdev user,id=mynet0,net=10.0.2.0/24,dhcpstart=10.0.2.15,hostfwd=tcp::10059-:22 \
 -smp 4 \
 -chardev stdio,id=mux,mux=on,logfile=/tmp/vm_log_2024-05-10T0232.log \
 -device virtio-serial,romfile= \
 -device virtconsole,chardev=mux \
 -monitor chardev:mux \
 -serial chardev:mux \
 -nographic

Note: I use my own compilation of qemu.

$ /opt/qemu-tdx/bin/qemu-system-x86_64 --version
QEMU emulator version 8.1.0
Copyright (c) 2003-2023 Fabrice Bellard and the QEMU Project developers

Note: I use my own OVMF.fd built by edk2 package. According to instructions found here: Instruction-to-set-up-TDX-host-and-guest.

Error
When attempting to boot I get this error.

qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]
qemu-system-x86_64: warning: host doesn't support requested feature: CPUID.07H:EBX.intel-pt [bit 25]
qemu-system-x86_64: KVM_TDX_INIT_MEM_REGION failed Input/output error

What am I doing wrong?

[syncronize-issues-to-jira]

Thank you for reporting your feedback to us!

The internal ticket has been created: https://warthogs.atlassian.net/browse/PEK-1613.

This message was autogenerated

[frenchwr]

Hi @elodj ,

Note: I use my own compilation of qemu.

Was it extended in some way to support TDX? The setup instructions (see the README) in this repo install custom versions of qemu and libvirt (among several other packages) to support TDX on Ubuntu, if you are following some other process we will not be able to offer support.

[elodj]

Hi @frenchwr ,

Was it extended in some way to support TDX? The setup instructions (see the README) in this repo install custom versions of qemu and libvirt (among several other packages) to support TDX on Ubuntu, if you are following some other process we will not be able to offer support.

Yes, qemu installation has TDX support, source: git clone --branch tdx-qemu-next-2023.9.21-v8.1.0 https://github.com/intel/qemu-tdx, can update this if needed. Additionally functionality of qemu was verified in a custom NixOS TD solution.

I don't think libvirt was modified in any way. Version info:

$ virsh --version
9.0.0

Server host - os info:

$ hostnamectl | grep -E "Operating System:|Kernel:"
Operating System: Debian GNU/Linux 12 (bookworm)
          Kernel: Linux 6.6.0-rc2-dirty

Hosts setup follows instructions in the cannonical/tdx and intel/tdx-linux repos, including kernel patches. TDX services are verified and functional on the host.