6.12-stable review patch. If anyone has any objections, please let me know.
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From: Thomas Weißschuh thomas.weissschuh@linutronix.de
[ Upstream commit e275f44e0a187b9d76830847976072f1c17b4b7b ]
The driver for the 8250 console is not used, as no port is found. Instead the prom0 bootconsole is used the whole time. The prom driver translates '\n' to '\r\n' before handing of the message off to the firmware. The firmware performs the same translation again. In the final output produced by QEMU each line ends with '\r\r\n'. This breaks the kunit parser, which can only handle '\r\n' and '\n'.
Use the Zilog console instead. It works correctly, is the one documented by the QEMU manual and also saves a bit of codesize: Before=4051011, After=4023326, chg -0.68%
Observed on QEMU 9.2.0.
Link: https://lore.kernel.org/r/20250214-kunit-qemu-sparc-console-v1-1-ba1dfdf8f0b... Fixes: 87c9c1631788 ("kunit: tool: add support for QEMU") Signed-off-by: Thomas Weißschuh thomas.weissschuh@linutronix.de Reviewed-by: David Gow davidgow@google.com Signed-off-by: Shuah Khan skhan@linuxfoundation.org Stable-dep-of: 1d31d536871f ("kunit: qemu_configs: Disable faulting tests on 32-bit SPARC") Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/kunit/qemu_configs/sparc.py | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/testing/kunit/qemu_configs/sparc.py b/tools/testing/kunit/qemu_configs/sparc.py index e975c4331a7c2..256d9573b4464 100644 --- a/tools/testing/kunit/qemu_configs/sparc.py +++ b/tools/testing/kunit/qemu_configs/sparc.py @@ -2,8 +2,9 @@ from ..qemu_config import QemuArchParams
QEMU_ARCH = QemuArchParams(linux_arch='sparc', kconfig=''' -CONFIG_SERIAL_8250=y -CONFIG_SERIAL_8250_CONSOLE=y''', +CONFIG_SERIAL_SUNZILOG=y +CONFIG_SERIAL_SUNZILOG_CONSOLE=y +''', qemu_arch='sparc', kernel_path='arch/sparc/boot/zImage', kernel_command_line='console=ttyS0 mem=256M',