tests/functional: add hypervisor test for aarch64

This is a simple test case that runs an image with kvmtool and
kvm-unit-tests which can validate virtualisation works. This is useful
for exercising TCG but can also be applied to any nested virt setup
which is why it doesn't specify an accelerator.

Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20250725154517.3523095-7-alex.bennee@linaro.org>

2 files changed, 72 insertions, 0 deletions

diff --git a/tests/functional/meson.build b/tests/functional/meson.build
index 8bebcd4..ecf965a 100644
--- a/tests/functional/meson.build
+++ b/tests/functional/meson.build
@@ -89,6 +89,7 @@ tests_aarch64_system_thorough = [
   'aarch64_device_passthrough',
   'aarch64_hotplug_pci',
   'aarch64_imx8mp_evk',
+  'aarch64_kvm',
   'aarch64_raspi3',
   'aarch64_raspi4',
   'aarch64_replay',
diff --git a/tests/functional/test_aarch64_kvm.py b/tests/functional/test_aarch64_kvm.py
new file mode 100755
index 0000000..9fb9286
--- /dev/null
+++ b/tests/functional/test_aarch64_kvm.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+#
+# Functional test that runs subsets of kvm-unit-tests on Aarch64.
+# These can run on TCG and any accelerator supporting nested
+# virtualisation.
+#
+# Copyright (c) 2025 Linaro
+#
+# Author:
+#  Alex Bennée <alex.bennee@linaro.org>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+from qemu_test import Asset
+from qemu_test import exec_command_and_wait_for_pattern as ec_and_wait
+from qemu_test.linuxkernel import LinuxKernelTest
+
+
+class Aarch64VirtKVMTests(LinuxKernelTest):
+
+    ASSET_KVM_TEST_KERNEL = Asset(
+        'https://fileserver.linaro.org/s/HmjaxXXYHYSqbes/'
+        'download?path=%2F&files='
+        'image-with-kvm-tool-and-unit-tests.gz',
+        '34de4aaea90db5da42729e7d28b77f392c37a2f4da859f889a5234aaf0970696')
+
+    # make it easier to detect successful return to shell
+    PS1 = 'RES=[$?] # '
+    OK_CMD = 'RES=[0] # '
+
+    # base of tests
+    KUT_BASE = "/usr/share/kvm-unit-tests/"
+
+    def _launch_guest(self, kvm_mode="nvhe"):
+
+        self.set_machine('virt')
+        kernel_path = self.ASSET_KVM_TEST_KERNEL.fetch()
+
+        self.vm.set_console()
+        kernel_command_line = (self.KERNEL_COMMON_COMMAND_LINE +
+                               f"console=ttyAMA0 kvm-arm.mode={kvm_mode}")
+
+        self.vm.add_args("-cpu", "cortex-a72")
+        self.vm.add_args("-machine", "virt,gic-version=3,virtualization=on",
+                         '-kernel', kernel_path,
+                         '-append', kernel_command_line)
+        self.vm.add_args("-smp", "2", "-m", "320")
+
+        self.vm.launch()
+
+        self.wait_for_console_pattern('buildroot login:')
+        ec_and_wait(self, 'root', '#')
+        ec_and_wait(self, f"export PS1='{self.PS1}'", self.OK_CMD)
+
+    # this is just a smoketest, we don't run all the tests in the image
+    def _smoketest_kvm(self):
+        ec_and_wait(self, f"{self.KUT_BASE}/selftest-setup", self.OK_CMD)
+        ec_and_wait(self, f"{self.KUT_BASE}/selftest-smp", self.OK_CMD)
+        ec_and_wait(self, f"{self.KUT_BASE}/selftest-vectors-kernel", self.OK_CMD)
+        ec_and_wait(self, f"{self.KUT_BASE}/selftest-vectors-user", self.OK_CMD)
+
+    def test_aarch64_nvhe_selftest(self):
+        self._launch_guest("nvhe")
+        self._smoketest_kvm()
+
+    def test_aarch64_vhe_selftest(self):
+        self._launch_guest("vhe")
+        self._smoketest_kvm()
+
+if __name__ == '__main__':
+    LinuxKernelTest.main()