On Wed, May 18, 2022 at 03:32PM +0800, 'David Gow' via KUnit Development wrote:
Add a new QEMU config for kunit_tool, x86_64-smp, which provides an 8-cpu SMP setup. No other kunit_tool configurations provide an SMP setup, so this is the best bet for testing things like KCSAN, which require a multicore/multi-cpu system.
The choice of 8 CPUs is pretty arbitrary: it's enough to get tests like KCSAN to run with a nontrivial number of worker threads, while still working relatively quickly on older machines.
Signed-off-by: David Gow davidgow@google.com
Acked-by: Marco Elver elver@google.com
This is based off the discussion in: https://groups.google.com/g/kasan-dev/c/A7XzC2pXRC8
tools/testing/kunit/qemu_configs/x86_64-smp.py | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 tools/testing/kunit/qemu_configs/x86_64-smp.py
diff --git a/tools/testing/kunit/qemu_configs/x86_64-smp.py b/tools/testing/kunit/qemu_configs/x86_64-smp.py new file mode 100644 index 000000000000..a95623f5f8b7 --- /dev/null +++ b/tools/testing/kunit/qemu_configs/x86_64-smp.py @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0 +from ..qemu_config import QemuArchParams
+QEMU_ARCH = QemuArchParams(linux_arch='x86_64',
kconfig='''+CONFIG_SERIAL_8250=y +CONFIG_SERIAL_8250_CONSOLE=y +CONFIG_SMP=y
''',qemu_arch='x86_64',kernel_path='arch/x86/boot/bzImage',kernel_command_line='console=ttyS0',extra_qemu_params=['-smp', '8'])-- 2.36.0.550.gb090851708-goog
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