diff mbox series

tests/functional: Add PCI hotplug test for aarch64

Message ID 20250509232156.106465-1-gustavo.romero@linaro.org
State New
Headers show
Series tests/functional: Add PCI hotplug test for aarch64 | expand

Commit Message

Gustavo Romero May 9, 2025, 11:19 p.m. UTC 
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.romero@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 mbox series

Patch

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.romero@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()