| #!/usr/bin/env python3 |
| # |
| # The test hotplugs a PCI device and checks it on a Linux guest. |
| # |
| # Copyright (c) 2025 Linaro Ltd. |
| # |
| # Author: |
| # Gustavo Romero <gustavo.romero@linaro.org> |
| # |
| # SPDX-License-Identifier: GPL-2.0-or-later |
| |
| from qemu_test import LinuxKernelTest, Asset, exec_command_and_wait_for_pattern |
| from qemu_test import BUILD_DIR |
| |
| class HotplugPCI(LinuxKernelTest): |
| |
| ASSET_KERNEL = Asset( |
| ('https://ftp.debian.org/debian/dists/bookworm/main/installer-arm64/' |
| '20230607+deb12u11/images/netboot/debian-installer/arm64/linux'), |
| 'd92a60392ce1e379ca198a1a820899f8f0d39a62d047c41ab79492f81541a9d9') |
| |
| ASSET_INITRD = Asset( |
| ('https://ftp.debian.org/debian/dists/bookworm/main/installer-arm64/' |
| '20230607+deb12u11/images/netboot/debian-installer/arm64/initrd.gz'), |
| '9f817f76951f3237bca8216bee35267bfb826815687f4b2fcdd5e6c2a917790c') |
| |
| def test_hotplug_pci(self): |
| |
| self.set_machine('virt') |
| |
| self.vm.add_args('-m', '512M', |
| '-cpu', 'cortex-a57', |
| '-append', |
| 'console=ttyAMA0,115200 init=/bin/sh', |
| '-device', |
| 'pcie-root-port,bus=pcie.0,chassis=1,slot=1,id=pcie.1', |
| '-bios', |
| self.build_file('pc-bios', 'edk2-aarch64-code.fd')) |
| |
| # BusyBox prompt |
| prompt = "~ #" |
| self.launch_kernel(self.ASSET_KERNEL.fetch(), |
| self.ASSET_INITRD.fetch(), |
| wait_for=prompt) |
| |
| # Check for initial state: 2 network adapters, lo and enp0s1. |
| exec_command_and_wait_for_pattern(self, |
| 'ls /sys/class/net | wc -l', |
| '2') |
| |
| # Hotplug one network adapter to the root port, i.e. pcie.1 bus. |
| self.vm.cmd('device_add', |
| driver='virtio-net-pci', |
| bus='pcie.1', |
| addr=0, |
| id='na') |
| # Wait for the kernel to recognize the new device. |
| self.wait_for_console_pattern('virtio-pci') |
| self.wait_for_console_pattern('virtio_net') |
| |
| # Check if there is a new network adapter. |
| exec_command_and_wait_for_pattern(self, |
| 'ls /sys/class/net | wc -l', |
| '3') |
| |
| self.vm.cmd('device_del', id='na') |
| exec_command_and_wait_for_pattern(self, |
| 'ls /sys/class/net | wc -l', |
| '2') |
| |
| if __name__ == '__main__': |
| LinuxKernelTest.main() |
