linux-modules-extra-generic is not a package name; the packages are versioned
as linux-modules-extra-<ver>-generic. Install it after detecting the generic
kernel version.
The GitHub runner's Azure kernel has CONFIG_USB_HID disabled, so it cannot
enumerate the simulated HID keyboard over USB/IP. Install and boot the Ubuntu
generic kernel instead (which ships usbhid/hid-generic as modules and
usbip/cdc-acm in linux-modules-extra), bundle + load the full module chain
(hid, hid-generic, usbhid, usbip-core, vhci-hcd, cdc-acm) in the guest, and
restore the keyboard check as a gating assertion. Now both the CDC ACM serial
device and the HID keyboard are verified in CI.
The Azure kernel does not load zstd/xz/gzip-compressed modules via insmod, so
decompress them to plain .ko when bundling the initramfs. Also copy the usbip
client to both /usr/sbin and /usr/bin (and its real path), and log its presence
in the guest for diagnostics.
The GitHub runner uses an Azure kernel that does not ship the usbip /
cdc-acm modules by default; on Ubuntu those live in the separate
linux-modules-extra package. Install it and make the initramfs builder /
guest loader accept compressed kernel modules (.ko.zst, .ko.xz, .ko.gz).
Boot a real Linux inside QEMU and confirm that simulated USB/IP devices
work against a real kernel (vhci-hcd + cdc_acm):
- Add examples/demo.rs: a single server exporting a HID keyboard and a
CDC ACM serial device on port 3240.
- Add scripts/qemu/: build a minimal initramfs (host kernel + busybox +
usbip tool + demo server), boot it in QEMU, attach the simulated devices
over 127.0.0.1, and verify:
* the serial port emits 'a' (0x61) -> SERIAL_TEST
* the keyboard generates a KEY_1 input event -> KEYBOARD_TEST
- Add .github/workflows/qemu.yml to run this in CI (KVM when available,
TCG fallback otherwise), uploading the serial console log as an artefact.
