| #!/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/trixie/main/installer-arm64/' | |
| '20250803/images/netboot/debian-installer/arm64/linux'), | |
| '93a6e4f9627d759375d28f863437a86a0659e125792a435f8e526dda006b7d5e') | |
| ASSET_INITRD = Asset( | |
| ('https://ftp.debian.org/debian/dists/trixie/main/installer-arm64/' | |
| '20250803/images/netboot/debian-installer/arm64/initrd.gz'), | |
| 'f6c78af7078ca67638ef3a50c926cd3c1485673243f8b37952e6bd854d6ba007') | |
| def test_hotplug_pci(self): | |
| self.set_machine('virt') | |
| self.require_accelerator('tcg') | |
| 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() |