Add a functional test, aarch64_hotplug_pci, to exercise PCI hotplug and
hot-unplug on arm64. Currently, the aarch64 'virt' machine uses the PCIe
native controller and does not support ACPI-based hotplugging. However,
since support is planned, this test sets 'acpi=force' and specifies an
EDK2 firmware image in advance. This is harmless and prepares for future
ACPI support.
Signed-off-by: Gustavo Romero <gustavo.rom...@linaro.org>
---
tests/functional/meson.build | 1 +
tests/functional/test_aarch64_hotplug_pci.py | 73 ++++++++++++++++++++
2 files changed, 74 insertions(+)
create mode 100755 tests/functional/test_aarch64_hotplug_pci.py
diff --git a/tests/functional/meson.build b/tests/functional/meson.build
index 52b4706cfe..2d68840fa2 100644
--- a/tests/functional/meson.build
+++ b/tests/functional/meson.build
@@ -83,6 +83,7 @@ tests_aarch64_system_quick = [
tests_aarch64_system_thorough = [
'aarch64_aspeed_ast2700',
'aarch64_aspeed_ast2700fc',
+ 'aarch64_hotplug_pci',
'aarch64_imx8mp_evk',
'aarch64_raspi3',
'aarch64_raspi4',
diff --git a/tests/functional/test_aarch64_hotplug_pci.py
b/tests/functional/test_aarch64_hotplug_pci.py
new file mode 100755
index 0000000000..031540ba22
--- /dev/null
+++ b/tests/functional/test_aarch64_hotplug_pci.py
@@ -0,0 +1,73 @@
+#!/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.rom...@linaro.org>
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later. See the COPYING file in the top-level directory.
+
+from os import path
+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/stable/main/installer-arm64/'
+ 'current/images/netboot/debian-installer/arm64/linux'),
+ '3821d4db56d42c6a4eac62f31846e35465940afd87746b4cfcdf5c9eca3117b2')
+
+ ASSET_INITRD = Asset(
+ ('https://ftp.debian.org/debian/dists/stable/main/installer-arm64/'
+ 'current/images/netboot/debian-installer/arm64/initrd.gz'),
+ '2583ec22b45265ad69e82f198674f53d4cd85be124fe012eedc2fd91156bc4b4')
+
+ def test_hotplug_pci(self):
+
+ self.vm.add_args('-m', '512M')
+ self.vm.add_args('-machine', 'type=virt')
+ self.vm.add_args('-cpu', 'cortex-a57')
+ self.vm.add_args('-append',
+ 'console=ttyAMA0,115200 acpi=force init=/bin/sh')
+ self.vm.add_args('-device',
+
'pcie-root-port,bus=pcie.0,chassis=1,slot=1,id=pcie.1')
+ self.vm.add_args('-bios', path.join(BUILD_DIR, '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 -l /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 -l /sys/class/net | wc -l',
+ '3')
+
+ self.vm.cmd('device_del', id='na')
+ exec_command_and_wait_for_pattern(self,
+ 'ls -l /sys/class/net | wc -l',
+ '2')
+
+if __name__ == '__main__':
+ LinuxKernelTest.main()
--
2.43.0
