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Message-Id: <20220518170124.2849497-4-dlatypov@google.com>
Date: Wed, 18 May 2022 10:01:24 -0700
From: Daniel Latypov <dlatypov@...gle.com>
To: brendanhiggins@...gle.com, davidgow@...gle.com
Cc: elver@...gle.com, linux-kernel@...r.kernel.org,
kasan-dev@...glegroups.com, kunit-dev@...glegroups.com,
linux-kselftest@...r.kernel.org, skhan@...uxfoundation.org,
Daniel Latypov <dlatypov@...gle.com>
Subject: [PATCH 3/3] kunit: tool: introduce --qemu_args
Example usage:
$ ./tools/testing/kunit/kunit.py run --arch=x86_64 \
--kconfig_add=CONFIG_SMP=y --qemu_args='-smp 8'
Looking in the test.log, one can see
> smp: Bringing up secondary CPUs ...
> .... node #0, CPUs: #1 #2 #3 #4 #5 #6 #7
> smp: Brought up 1 node, 8 CPUs
This flag would allow people to make tweaks like this without having to
create custom qemu_config files.
For consistency with --kernel_args, we allow users to repeat this
argument, e.g. you can tack on a --qemu_args='-m 2048', or you could
just append it to the first string ('-smp 8 -m 2048').
Signed-off-by: Daniel Latypov <dlatypov@...gle.com>
---
tools/testing/kunit/kunit.py | 14 +++++++++++++-
tools/testing/kunit/kunit_kernel.py | 10 +++++++---
tools/testing/kunit/kunit_tool_test.py | 20 +++++++++++++++++---
3 files changed, 37 insertions(+), 7 deletions(-)
diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 8a90d80ee66e..e01c7964f744 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -10,6 +10,7 @@
import argparse
import os
import re
+import shlex
import sys
import time
@@ -323,6 +324,10 @@ def add_common_opts(parser) -> None:
'a QemuArchParams object.'),
type=str, metavar='FILE')
+ parser.add_argument('--qemu_args',
+ help='Additional QEMU arguments, e.g. "-smp 8"',
+ action='append', metavar='')
+
def add_build_opts(parser) -> None:
parser.add_argument('--jobs',
help='As in the make command, "Specifies the number of '
@@ -368,12 +373,19 @@ def add_parse_opts(parser) -> None:
def tree_from_args(cli_args: argparse.Namespace) -> kunit_kernel.LinuxSourceTree:
"""Returns a LinuxSourceTree based on the user's arguments."""
+ # Allow users to specify multiple arguments in one string, e.g. '-smp 8'
+ qemu_args: List[str] = []
+ if cli_args.qemu_args:
+ for arg in cli_args.qemu_args:
+ qemu_args.extend(shlex.split(arg))
+
return kunit_kernel.LinuxSourceTree(cli_args.build_dir,
kunitconfig_path=cli_args.kunitconfig,
kconfig_add=cli_args.kconfig_add,
arch=cli_args.arch,
cross_compile=cli_args.cross_compile,
- qemu_config_path=cli_args.qemu_config)
+ qemu_config_path=cli_args.qemu_config,
+ extra_qemu_args=qemu_args)
def main(argv):
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
index e93f07ac0af1..a791073d25f9 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -187,6 +187,7 @@ def _default_qemu_config_path(arch: str) -> str:
raise ConfigError(arch + ' is not a valid arch, options are ' + str(sorted(options)))
def _get_qemu_ops(config_path: str,
+ extra_qemu_args: Optional[List[str]],
cross_compile: Optional[str]) -> Tuple[str, LinuxSourceTreeOperations]:
# The module name/path has very little to do with where the actual file
# exists (I learned this through experimentation and could not find it
@@ -207,6 +208,8 @@ def _get_qemu_ops(config_path: str,
if not hasattr(config, 'QEMU_ARCH'):
raise ValueError('qemu_config module missing "QEMU_ARCH": ' + config_path)
params: qemu_config.QemuArchParams = config.QEMU_ARCH # type: ignore
+ if extra_qemu_args:
+ params.extra_qemu_params.extend(extra_qemu_args)
return params.linux_arch, LinuxSourceTreeOperationsQemu(
params, cross_compile=cross_compile)
@@ -220,17 +223,18 @@ class LinuxSourceTree:
kconfig_add: Optional[List[str]]=None,
arch=None,
cross_compile=None,
- qemu_config_path=None) -> None:
+ qemu_config_path=None,
+ extra_qemu_args=None) -> None:
signal.signal(signal.SIGINT, self.signal_handler)
if qemu_config_path:
- self._arch, self._ops = _get_qemu_ops(qemu_config_path, cross_compile)
+ self._arch, self._ops = _get_qemu_ops(qemu_config_path, extra_qemu_args, cross_compile)
else:
self._arch = 'um' if arch is None else arch
if self._arch == 'um':
self._ops = LinuxSourceTreeOperationsUml(cross_compile=cross_compile)
else:
qemu_config_path = _default_qemu_config_path(self._arch)
- _, self._ops = _get_qemu_ops(qemu_config_path, cross_compile)
+ _, self._ops = _get_qemu_ops(qemu_config_path, extra_qemu_args, cross_compile)
if kunitconfig_path:
if os.path.isdir(kunitconfig_path):
diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
index baee11d96474..7fe5c8b0fb57 100755
--- a/tools/testing/kunit/kunit_tool_test.py
+++ b/tools/testing/kunit/kunit_tool_test.py
@@ -649,7 +649,8 @@ class KUnitMainTest(unittest.TestCase):
kconfig_add=None,
arch='um',
cross_compile=None,
- qemu_config_path=None)
+ qemu_config_path=None,
+ extra_qemu_args=[])
def test_config_kunitconfig(self):
kunit.main(['config', '--kunitconfig=mykunitconfig'])
@@ -659,7 +660,8 @@ class KUnitMainTest(unittest.TestCase):
kconfig_add=None,
arch='um',
cross_compile=None,
- qemu_config_path=None)
+ qemu_config_path=None,
+ extra_qemu_args=[])
def test_run_kconfig_add(self):
kunit.main(['run', '--kconfig_add=CONFIG_KASAN=y', '--kconfig_add=CONFIG_KCSAN=y'])
@@ -669,7 +671,19 @@ class KUnitMainTest(unittest.TestCase):
kconfig_add=['CONFIG_KASAN=y', 'CONFIG_KCSAN=y'],
arch='um',
cross_compile=None,
- qemu_config_path=None)
+ qemu_config_path=None,
+ extra_qemu_args=[])
+
+ def test_run_qemu_args(self):
+ kunit.main(['run', '--arch=x86_64', '--qemu_args', '-m 2048'])
+ # Just verify that we parsed and initialized it correctly here.
+ self.mock_linux_init.assert_called_once_with('.kunit',
+ kunitconfig_path=None,
+ kconfig_add=None,
+ arch='x86_64',
+ cross_compile=None,
+ qemu_config_path=None,
+ extra_qemu_args=['-m', '2048'])
def test_run_kernel_args(self):
kunit.main(['run', '--kernel_args=a=1', '--kernel_args=b=2'])
--
2.36.1.124.g0e6072fb45-goog
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