[PATCH v4 6/7] tests/functional/riscv64: Add boot test for Milk-V Duo board

Add a functional boot test for the Milk-V Duo board to validate the
end-to-end boot flow.

$ ./build/run ./tests/functional/riscv64/test_milkv_duo.py
TAP version 13
ok 1 test_milkv_duo.MilkvDuoMachine.test_riscv64_milkv_duo
1..1

Signed-off-by: Kuan-Wei Chiu <[email protected]>
---
 MAINTAINERS                                |  1 +
 tests/functional/riscv64/meson.build       |  1 +
 tests/functional/riscv64/test_milkv_duo.py | 50 ++++++++++++++++++++++
 3 files changed, 52 insertions(+)
 create mode 100755 tests/functional/riscv64/test_milkv_duo.py

diff --git a/MAINTAINERS b/MAINTAINERS
index 245eb7bb58..3f79334c59 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1861,6 +1861,7 @@ F: hw/riscv/milkv_duo.c
 F: include/hw/char/dw8250.h
 F: include/hw/misc/cv1800b_clk.h
 F: include/hw/riscv/cv1800b.h
+F: tests/functional/riscv64/test_milkv_duo.py
 F: tests/qtest/milkv-duo-test.c
 
 RX Machines
diff --git a/tests/functional/riscv64/meson.build b/tests/functional/riscv64/meson.build
index d1a3e6c2bf..8a4f1d00f9 100644
--- a/tests/functional/riscv64/meson.build
+++ b/tests/functional/riscv64/meson.build
@@ -18,4 +18,5 @@ tests_riscv64_system_thorough = [
   'sifive_u',
   'tt_atlantis',
   'tuxrun',
+  'milkv_duo',
 ]
diff --git a/tests/functional/riscv64/test_milkv_duo.py b/tests/functional/riscv64/test_milkv_duo.py
new file mode 100755
index 0000000000..aff247e61f
--- /dev/null
+++ b/tests/functional/riscv64/test_milkv_duo.py
@@ -0,0 +1,50 @@
+#!/usr/bin/env python3
+#
+# Functional test that boots a Linux kernel on a Milk-V Duo machine
+#
+# Copyright (c) 2026 Kuan-Wei Chiu <[email protected]>
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+from qemu_test import LinuxKernelTest, Asset
+from qemu_test import wait_for_console_pattern
+
+class MilkvDuoMachine(LinuxKernelTest):
+
+    timeout = 120
+
+    ASSET_KERNEL = Asset(
+        'https://github.com/visitorckw/milkv-duo-qemu-assets/releases/download/v1.0/Image',
+        '3f157ecfcb86d28bfcff9fd3c1a43f60a8513b1919739fdc9a4d946aba35b2af'
+    )
+    ASSET_DTB = Asset(
+        'https://github.com/visitorckw/milkv-duo-qemu-assets/releases/download/v1.0/cv1800b-milkv-duo.dtb',
+        '2a5d165f64c4b2d55bba282b2974941ab223f6f5220c2e7721e35ab81311c098'
+    )
+    ASSET_ROOTFS = Asset(
+        'https://github.com/visitorckw/milkv-duo-qemu-assets/releases/download/v1.0/rootfs.ext4',
+        '9e7de9222ab4a79d1291866453aa47cd67a543216df6159bf9b42d055240a676'
+    )
+
+    def test_riscv64_milkv_duo(self):
+        self.set_machine('milkv-duo')
+
+        kernel_path = self.ASSET_KERNEL.fetch()
+        dtb_path = self.ASSET_DTB.fetch()
+        rootfs_path = self.ASSET_ROOTFS.fetch()
+
+        self.vm.set_console()
+        self.vm.add_args('-bios', 'default',
+                         '-kernel', kernel_path,
+                         '-dtb', dtb_path,
+                         '-drive', f'file={rootfs_path},format=raw,id=sd-card,snapshot=on',
+                         '-device', 'sd-card,drive=sd-card',
+                         '-append', 'console=ttyS0,115200 root=/dev/mmcblk0 rootwait earlycon')
+
+        self.vm.launch()
+
+        wait_for_console_pattern(self, 'Booting Linux on hartid')
+        wait_for_console_pattern(self, 'Run /sbin/init as init process')
+
+if __name__ == '__main__':
+    LinuxKernelTest.main()
-- 
2.55.0.766.g2966f0265a-goog