add test to check quote generation via vsock

[hector-cao]

this test will contribute to verify the issue #252

the test that checks the issue is tests/test_guest_tdxattest.py::test_guest_tdxattest_vsock_wrong_qgs_addr
it currently fails and should succeed once the issue is resolved

QemuMachine created.
qemu-system-x86_64 -cpu host -smp 16,sockets=1 -accel kvm -nographic -nodefaults -no-user-config -m 2G -bios /usr/share/ovmf/OVMF.fd -object {'qom-type': 'tdx-guest', 'id': 'tdx', 'quote-generation-socket': {'type': 'vsock', 'cid': '3', 'port': '4050'}} -machine q35,kernel_irqchip=split,confidential-guest-support=tdx -drive file=/tmp/tdxtest-default-xc64ol1d/image.qcow2,if=none,id=virtio-disk0 -device virtio-blk-pci,drive=virtio-disk0 -pidfile /tmp/tdxtest-default-xc64ol1d/qemu.pid -monitor unix:/tmp/tdxtest-default-xc64ol1d/monitor.sock,server,nowait -qmp unix:/tmp/tdxtest-default-xc64ol1d/qmp.sock,server=on,wait=off -device virtio-net-pci,netdev=nic0_td -netdev user,id=nic0_td,hostfwd=tcp::55375-:22 -D /tmp/tdxtest-default-xc64ol1d/qemu-log.txt -chardev file,id=c1,path=/tmp/tdxtest-default-xc64ol1d/serial.log,signal=off -device isa-serial,chardev=c1 -device vhost-vsock-pci,guest-cid=10
Connecting ...
Connected ...

Failed to get the quote

FAILED

additional changes:

• enable the function enable_quote_socket to enable_qgs_addr to better match what it does, add an argument to allow the customization of the QGS address

Fixes : #252

[frenchwr]

LGTM

[hector-cao]

The fix has been brought in with the version 1.21-0ubuntu2.2 of the package libtdx-attest1

And now the test passes:

tests/test_guest_tdxattest.py::test_guest_tdxattest_vsock_wrong_qgs_addr 

QemuMachine created.
qemu-system-x86_64 -cpu host -smp 16,sockets=1 -accel kvm -nographic -nodefaults -no-user-config -m 2G -bios /usr/share/ovmf/OVMF.fd -object {'qom-type': 'tdx-guest', 'id': 'tdx', 'quote-generation-socket': {'type': 'vsock', 'cid': '3', 'port': '4050'}} -machine q35,kernel_irqchip=split,confidential-guest-support=tdx -drive file=/tmp/tdxtest-default-jut8td_v/image.qcow2,if=none,id=virtio-disk0 -device virtio-blk-pci,drive=virtio-disk0 -pidfile /tmp/tdxtest-default-jut8td_v/qemu.pid -monitor unix:/tmp/tdxtest-default-jut8td_v/monitor.sock,server,nowait -qmp unix:/tmp/tdxtest-default-jut8td_v/qmp.sock,server=on,wait=off -device virtio-net-pci,netdev=nic0_td -netdev user,id=nic0_td,hostfwd=tcp::46985-:22 -D /tmp/tdxtest-default-jut8td_v/qemu-log.txt -chardev file,id=c1,path=/tmp/tdxtest-default-jut8td_v/serial.log,signal=off -device isa-serial,chardev=c1 -device vhost-vsock-pci,guest-cid=10
Connecting ...
Connected ...
PASSED