[PATCH v5] kunit: qemu_configs: Add MIPS configurations

[PATCH v5] kunit: qemu_configs: Add MIPS configurations

[Thomas Weißschuh]

Add basic support to run various MIPS variants via kunit_tool using the
virtualized malta platform.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Reviewed-by: David Gow <davidgow@google.com>
---
Changes in v5:
- Rebase on v6.17-rc1
- Drop alreayd applied patch to MIPS core code and related CCs
- Link to v4: https://lore.kernel.org/r/20250611-kunit-mips-v4-0-1d8997fb2ae4@linutronix.de

Changes in v4:
- Rebase on v6.16-rc1
- Pick up reviews from David
- Clarify that GIC page is linked to vDSO
- Link to v3: https://lore.kernel.org/r/20250415-kunit-mips-v3-0-4ec2461b5a7e@linutronix.de

Changes in v3:
- Also skip VDSO_RANDOMIZE_SIZE adjustment for kthreads
- Link to v2: https://lore.kernel.org/r/20250414-kunit-mips-v2-0-4cf01e1a29e6@linutronix.de

Changes in v2:
- Fix usercopy kunit test by handling ABI-less tasks in stack_top()
- Drop change to mm initialization.
  The broken test is not built by default anymore.
- Link to v1: https://lore.kernel.org/r/20250212-kunit-mips-v1-0-eb49c9d76615@linutronix.de
---
 tools/testing/kunit/qemu_configs/mips.py     | 18 ++++++++++++++++++
 tools/testing/kunit/qemu_configs/mips64.py   | 19 +++++++++++++++++++
 tools/testing/kunit/qemu_configs/mips64el.py | 19 +++++++++++++++++++
 tools/testing/kunit/qemu_configs/mipsel.py   | 18 ++++++++++++++++++
 4 files changed, 74 insertions(+)

diff --git a/tools/testing/kunit/qemu_configs/mips.py b/tools/testing/kunit/qemu_configs/mips.py
new file mode 100644
index 0000000000000000000000000000000000000000..8899ac157b30bd2ee847eacd5b90fe6ad4e5fb04
--- /dev/null
+++ b/tools/testing/kunit/qemu_configs/mips.py
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0
+
+from ..qemu_config import QemuArchParams
+
+QEMU_ARCH = QemuArchParams(linux_arch='mips',
+                           kconfig='''
+CONFIG_32BIT=y
+CONFIG_CPU_BIG_ENDIAN=y
+CONFIG_MIPS_MALTA=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SYSCON=y
+''',
+                           qemu_arch='mips',
+                           kernel_path='vmlinuz',
+                           kernel_command_line='console=ttyS0',
+                           extra_qemu_params=['-M', 'malta'])
diff --git a/tools/testing/kunit/qemu_configs/mips64.py b/tools/testing/kunit/qemu_configs/mips64.py
new file mode 100644
index 0000000000000000000000000000000000000000..1478aed05b94da4914f34c6a8affdcfe34eb88ea
--- /dev/null
+++ b/tools/testing/kunit/qemu_configs/mips64.py
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+
+from ..qemu_config import QemuArchParams
+
+QEMU_ARCH = QemuArchParams(linux_arch='mips',
+                           kconfig='''
+CONFIG_CPU_MIPS64_R2=y
+CONFIG_64BIT=y
+CONFIG_CPU_BIG_ENDIAN=y
+CONFIG_MIPS_MALTA=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SYSCON=y
+''',
+                           qemu_arch='mips64',
+                           kernel_path='vmlinuz',
+                           kernel_command_line='console=ttyS0',
+                           extra_qemu_params=['-M', 'malta', '-cpu', '5KEc'])
diff --git a/tools/testing/kunit/qemu_configs/mips64el.py b/tools/testing/kunit/qemu_configs/mips64el.py
new file mode 100644
index 0000000000000000000000000000000000000000..300c711d7a82500b2ebcb4cf1467b6f72b5c17aa
--- /dev/null
+++ b/tools/testing/kunit/qemu_configs/mips64el.py
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+
+from ..qemu_config import QemuArchParams
+
+QEMU_ARCH = QemuArchParams(linux_arch='mips',
+                           kconfig='''
+CONFIG_CPU_MIPS64_R2=y
+CONFIG_64BIT=y
+CONFIG_CPU_LITTLE_ENDIAN=y
+CONFIG_MIPS_MALTA=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SYSCON=y
+''',
+                           qemu_arch='mips64el',
+                           kernel_path='vmlinuz',
+                           kernel_command_line='console=ttyS0',
+                           extra_qemu_params=['-M', 'malta', '-cpu', '5KEc'])
diff --git a/tools/testing/kunit/qemu_configs/mipsel.py b/tools/testing/kunit/qemu_configs/mipsel.py
new file mode 100644
index 0000000000000000000000000000000000000000..3d3543315b45776d0e77fb5c00c8c0a89eafdffd
--- /dev/null
+++ b/tools/testing/kunit/qemu_configs/mipsel.py
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0
+
+from ..qemu_config import QemuArchParams
+
+QEMU_ARCH = QemuArchParams(linux_arch='mips',
+                           kconfig='''
+CONFIG_32BIT=y
+CONFIG_CPU_LITTLE_ENDIAN=y
+CONFIG_MIPS_MALTA=y
+CONFIG_SERIAL_8250=y
+CONFIG_SERIAL_8250_CONSOLE=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_SYSCON=y
+''',
+                           qemu_arch='mipsel',
+                           kernel_path='vmlinuz',
+                           kernel_command_line='console=ttyS0',
+                           extra_qemu_params=['-M', 'malta'])

---
base-commit: 5606dd26f0b0d614e64a51e68c86e5066f9a5b71
change-id: 20241014-kunit-mips-e4fe1c265ed7

Best regards,
-- 
Thomas Weißschuh <thomas.weissschuh@linutronix.de>