[PATCH] tests/functional/ppc64: add pseries migration and powernv NVMe tests

[Aniket Sahu <asahu1x@linux.ibm.com>]

Add two new groups of functional tests that cover scenarios currently
missing from the ppc64 test suite:

1. pseries live migration (pseries machine type)
    - Extends the quick migration suite (already covering mac99) with
      tcp-localhost, UNIX socket, and exec (socat) migration tests for
      the pseries machine type.  This complements the existing
      test_ppc64_linux_migration test in test_pseries.py (which boots a
      full kernel) by providing lightweight no-boot migration smoke tests
      that run quickly.

2. PowerNV NVMe + network device boot (powernv machine type)
    - The existing do_test_ppc64_powernv() helper in test_powernv.py
      already boots a rootfs from NVMe for P8/P9/P10/P11.  This patch
      adds a complementary test that also verifies the e1000e network
      adapter and USB xHCI controller are probed successfully by Linux -
      previously these were present in the device args but no console
      check was made for them.
    - Adds test_powernv10_rainier() for the powernv10-rainier variant
      that models the IBM Rainier system board.

Signed-off-by: Aniket Sahu <asahu1x@linux.ibm.com>

diff --git a/tests/functional/ppc64/meson.build 
b/tests/functional/ppc64/meson.build
index cb3c745624..19c32c8b67 100644
--- a/tests/functional/ppc64/meson.build
+++ b/tests/functional/ppc64/meson.build
@@ -1,6 +1,8 @@
  # SPDX-License-Identifier: GPL-2.0-or-later

  test_ppc64_timeouts = {
+  'pseries_migrate' : 60,
+  'powernv_devices' : 480,
    'fadump' : 480,
    'hv' : 1000,
    'mac99' : 120,
@@ -14,12 +16,14 @@ test_ppc64_timeouts = {
  tests_ppc64_system_quick = [
    'migration',
    'vmstate',
+  'pseries_migrate',
  ]

  tests_ppc64_system_thorough = [
    'e500',
    'fadump',
    'hv',
+  'powernv_devices',
    'mac99',
    'openbsd',
    'powernv',
diff --git a/tests/functional/ppc64/test_powernv_devices.py 
b/tests/functional/ppc64/test_powernv_devices.py
new file mode 100644
index 0000000000..6135855612
--- /dev/null
+++ b/tests/functional/ppc64/test_powernv_devices.py
@@ -0,0 +1,151 @@
+#!/usr/bin/env python3
+#
+# Functional tests that boot Linux on powernv machines and explicitly
+# verify that PCIe-attached devices (NVMe, e1000e, xHCI USB) are
+# detected by the guest kernel.  Also covers the powernv10-rainier
+# board variant.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+from qemu_test import LinuxKernelTest, Asset
+
+
+class PowerNVDevicesTest(LinuxKernelTest):
+    """
+    Boot Linux on powernv variants and verify that PCIe devices are
+    detected by the guest.
+
+    The existing test_powernv.py::do_test_ppc64_powernv() attaches an
+    NVMe drive, an e1000e NIC, and an xHCI USB controller, but only
+    waits for the CPU-generation string and the init process. This
+    test adds explicit console pattern checks for each device so that
+    regressions in device enumeration or PCI/PCIe topology are caught.
+
+    An additional test covers powernv10-rainier (the IBM Rainier system
+    board variant) which has a slightly different PHB topology.
+    """
+
+    timeout = 480
+
+    ASSET_KERNEL = Asset(
+ ('https://github.com/legoater/qemu-ppc-boot/raw/refs/heads/main/'
+         'buildroot/qemu_ppc64le_powernv8-2025.02/vmlinux'),
+ '6fd29aff9ad4362511ea5d0acbb510667c7031928e97d64ec15bbc5daf4b8151')
+
+    ASSET_INITRD = Asset(
+ ('https://github.com/legoater/qemu-ppc-boot/raw/refs/heads/main/'
+         'buildroot/qemu_ppc64le_powernv8-2025.02/rootfs.ext2'),
+ 'aee2192b692077c4bde31cb56ce474424b358f17cec323d5c94af3970c9aada2')
+
+    def setUp(self):
+        super().setUp()
+        self.require_accelerator('tcg')
+
+    def _do_test_powernv_pcie_devices(self, machine):
+        """
+        Boot *machine* and verify NVMe, e1000e, and xHCI are detected.
+
+        Device topology (matches the existing do_test_ppc64_powernv 
helper):
+          pcie.2  → NVMe drive (boot device, rootfs)
+          bridge1 → e1000e NIC (addr 0x3)
+          bridge1 → nec-usb-xhci (addr 0x2)
+
+        Expected kernel log patterns checked:
+          * "nvme nvme0" — NVMe controller probe
+          * "e1000e"     — Intel e1000e NIC probe
+          * "xhci_hcd"   — USB xHCI host controller probe
+          * "Run /sbin/init as init process" — reached userland
+        """
+        kernel_path = self.ASSET_KERNEL.fetch()
+        initrd_path = self.ASSET_INITRD.fetch()
+
+        self.set_machine(machine)
+        self.vm.set_console()
+        self.vm.add_args(
+            '-kernel', kernel_path,
+            '-drive',
+ f'file={initrd_path},format=raw,if=none,id=drive0,readonly=on',
+            '-append', 'root=/dev/nvme0n1 console=tty0 console=hvc0',
+            '-device', 'pcie-pci-bridge,id=bridge1,bus=pcie.1,addr=0x0',
+            '-device', 'nvme,drive=drive0,bus=pcie.2,addr=0x0,serial=1234',
+            '-device', 'e1000e,bus=bridge1,addr=0x3',
+            '-device', 'nec-usb-xhci,bus=bridge1,addr=0x2',
+        )
+        self.vm.launch()
+
+        # NVMe controller should be detected first (it is the boot disk).
+        self.wait_for_console_pattern('nvme nvme0')
+
+        # e1000e NIC detection.
+        self.wait_for_console_pattern('e1000e')
+
+        # USB xHCI host controller detection.
+        self.wait_for_console_pattern('xhci_hcd')
+
+        # System reached userland — final sanity check.
+        self.wait_for_console_pattern('Run /sbin/init as init process')
+
+    def test_powernv8_pcie_devices(self):
+        """powernv8 (P8): NVMe + e1000e + xHCI detected."""
+        self._do_test_powernv_pcie_devices('powernv8')
+
+    def test_powernv9_pcie_devices(self):
+        """powernv9 (P9): NVMe + e1000e + xHCI detected."""
+        self._do_test_powernv_pcie_devices('powernv9')
+
+    def test_powernv10_pcie_devices(self):
+        """powernv10 (P10): NVMe + e1000e + xHCI detected."""
+        self._do_test_powernv_pcie_devices('powernv10')
+
+    def test_powernv11_pcie_devices(self):
+        """powernv11 (P11): NVMe + e1000e + xHCI detected."""
+        self._do_test_powernv_pcie_devices('powernv11')
+
+    def test_powernv10_rainier_pcie_devices(self):
+        """
+        powernv10-rainier: NVMe + e1000e + xHCI detected.
+
+        The Rainier board variant maps PCIe root ports slightly
+        differently from the default powernv10 topology.  Verify that
+        the same device set is enumerated successfully.
+        """
+        self._do_test_powernv_pcie_devices('powernv10-rainier')
+
+    def test_powernv9_hpt_pcie_devices(self):
+        """
+        powernv9 booted with disable_radix (HPT mode): verify devices.
+
+        Radix MMU is the default on P9.  Force the HPT (Hash Page Table)
+        MMU path to exercise an alternative translation code path while
+        still ensuring PCI devices are enumerated correctly.
+        """
+        kernel_path = self.ASSET_KERNEL.fetch()
+        initrd_path = self.ASSET_INITRD.fetch()
+
+        self.set_machine('powernv9')
+        self.vm.set_console()
+        self.vm.add_args(
+            '-kernel', kernel_path,
+            '-drive',
+ f'file={initrd_path},format=raw,if=none,id=drive0,readonly=on',
+            '-append',
+            'root=/dev/nvme0n1 console=tty0 console=hvc0 disable_radix',
+            '-device', 'pcie-pci-bridge,id=bridge1,bus=pcie.1,addr=0x0',
+            '-device', 'nvme,drive=drive0,bus=pcie.2,addr=0x0,serial=1234',
+            '-device', 'e1000e,bus=bridge1,addr=0x3',
+            '-device', 'nec-usb-xhci,bus=bridge1,addr=0x2',
+        )
+        self.vm.launch()
+
+        # HPT-specific boot message.
+        self.wait_for_console_pattern('hash-mmu: Initializing hash mmu')
+
+        # Device checks same as the radix path.
+        self.wait_for_console_pattern('nvme nvme0')
+        self.wait_for_console_pattern('e1000e')
+        self.wait_for_console_pattern('xhci_hcd')
+        self.wait_for_console_pattern('Run /sbin/init as init process')
+
+
+if __name__ == '__main__':
+    PowerNVDevicesTest.main()
diff --git a/tests/functional/ppc64/test_pseries_migrate.py 
b/tests/functional/ppc64/test_pseries_migrate.py
new file mode 100644
index 0000000000..0cb929e35f
--- /dev/null
+++ b/tests/functional/ppc64/test_pseries_migrate.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+#
+# Lightweight (no-boot) migration smoke tests for the pseries machine type.
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+from migration import MigrationTest
+
+
+class PseriesMigrationTest(MigrationTest):
+    """
+    Lightweight migration smoke tests for pseries.
+
+    No kernel is booted — QEMU is launched with -nodefaults and
+    immediately migrated so the tests run in a few seconds.  This
+    catches regressions in the pseries vmstate save/restore path
+    without the overhead of a full kernel boot.
+
+    These complement the existing test_ppc64_linux_migration test in
+    test_pseries.py which exercises migration mid-boot.
+    """
+
+    timeout = 60
+
+    def test_pseries_migration_with_tcp_localhost(self):
+        """Basic TCP-localhost migration for pseries."""
+        self.set_machine('pseries')
+        self.migration_with_tcp_localhost()
+
+    def test_pseries_migration_with_unix(self):
+        """UNIX socket migration for pseries."""
+        self.set_machine('pseries')
+        self.migration_with_unix()
+
+    def test_pseries_migration_with_exec(self):
+        """exec (socat) migration for pseries."""
+        self.set_machine('pseries')
+        self.migration_with_exec()
+
+    def test_powernv_migration_with_tcp_localhost(self):
+        """Basic TCP-localhost migration for powernv."""
+        self.set_machine('powernv')
+        self.migration_with_tcp_localhost()
+
+    def test_powernv_migration_with_unix(self):
+        """UNIX socket migration for powernv."""
+        self.set_machine('powernv')
+        self.migration_with_unix()
+
+    def test_powernv_migration_with_exec(self):
+        """exec (socat) migration for powernv."""
+        self.set_machine('powernv')
+        self.migration_with_exec()
+
+
+if __name__ == '__main__':
+    MigrationTest.main()
--
2.53.0