On Sat, May 8, 2021 at 5:31 AM Brendan Higgins
<brendanhiggins@xxxxxxxxxx> wrote:
>
> Add basic support to run QEMU via kunit_tool. Add support for i386,
> x86_64, arm, arm64, and a bunch more.
>
> Signed-off-by: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
> Tested-by: David Gow <davidgow@xxxxxxxxxx>
> ---
>
> Changes since last revision:
>
> - A number of minor obvious issues pointed out by David and Daniel.
> - Added facility for merging Kconfigs at Daniel's suggestion.
> - Broke out qemu_configs each into their own config file which is loaded
> dynamically - mostly at David's suggestion.
>
> ---
This seems pretty good to me. I only have one real complaint --
qemu_configs needing to be in a subdirectory of ./tools/testing/kunit
-- but am able to tolerate that (even if I'd prefer not to have it) if
it's documented properly.
Otherwise, save for a couple of minor nitpicks, this seems good to go.
Reviewed-by: David Gow <davidgow@xxxxxxxxxx>
> tools/testing/kunit/kunit.py | 57 ++++++-
> tools/testing/kunit/kunit_config.py | 7 +-
> tools/testing/kunit/kunit_kernel.py | 170 ++++++++++++++++----
> tools/testing/kunit/kunit_tool_test.py | 18 ++-
> tools/testing/kunit/qemu_config.py | 17 ++
> tools/testing/kunit/qemu_configs/alpha.py | 10 ++
> tools/testing/kunit/qemu_configs/arm.py | 13 ++
> tools/testing/kunit/qemu_configs/arm64.py | 12 ++
> tools/testing/kunit/qemu_configs/i386.py | 10 ++
> tools/testing/kunit/qemu_configs/powerpc.py | 12 ++
> tools/testing/kunit/qemu_configs/riscv.py | 31 ++++
> tools/testing/kunit/qemu_configs/s390.py | 14 ++
> tools/testing/kunit/qemu_configs/sparc.py | 10 ++
> tools/testing/kunit/qemu_configs/x86_64.py | 10 ++
> 14 files changed, 350 insertions(+), 41 deletions(-)
> create mode 100644 tools/testing/kunit/qemu_config.py
> create mode 100644 tools/testing/kunit/qemu_configs/alpha.py
> create mode 100644 tools/testing/kunit/qemu_configs/arm.py
> create mode 100644 tools/testing/kunit/qemu_configs/arm64.py
> create mode 100644 tools/testing/kunit/qemu_configs/i386.py
> create mode 100644 tools/testing/kunit/qemu_configs/powerpc.py
> create mode 100644 tools/testing/kunit/qemu_configs/riscv.py
> create mode 100644 tools/testing/kunit/qemu_configs/s390.py
> create mode 100644 tools/testing/kunit/qemu_configs/sparc.py
> create mode 100644 tools/testing/kunit/qemu_configs/x86_64.py
>
> diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
> index 5da8fb3762f98..be8d8d4a4e08f 100755
> --- a/tools/testing/kunit/kunit.py
> +++ b/tools/testing/kunit/kunit.py
> @@ -70,10 +70,10 @@ def build_tests(linux: kunit_kernel.LinuxSourceTree,
> kunit_parser.print_with_timestamp('Building KUnit Kernel ...')
>
> build_start = time.time()
> - success = linux.build_um_kernel(request.alltests,
> - request.jobs,
> - request.build_dir,
> - request.make_options)
> + success = linux.build_kernel(request.alltests,
> + request.jobs,
> + request.build_dir,
> + request.make_options)
> build_end = time.time()
> if not success:
> return KunitResult(KunitStatus.BUILD_FAILURE,
> @@ -189,6 +189,31 @@ def add_common_opts(parser) -> None:
> 'will get automatically appended.',
> metavar='kunitconfig')
>
> + parser.add_argument('--arch',
> + help=('Specifies the architecture to run tests under. '
> + 'The architecture specified here must match the '
> + 'string passed to the ARCH make param, '
> + 'e.g. i386, x86_64, arm, um, etc. Non-UML '
> + 'architectures run on QEMU.'),
> + type=str, default='um', metavar='arch')
> +
> + parser.add_argument('--cross_compile',
> + help=('Sets make\'s CROSS_COMPILE variable; it should '
> + 'be set to a toolchain path prefix (the prefix '
> + 'of gcc and other tools in your toolchain, for '
> + 'example `sparc64-linux-gnu-` if you have the '
> + 'sparc toolchain installed on your system, or '
> + '`$HOME/toolchains/microblaze/gcc-9.2.0-nolibc/microblaze-linux/bin/microblaze-linux-` '
Super-minor nit: is there a shorter example we can give that's not
much longer than all the surrounding lines?
> + 'if you have downloaded the microblaze toolchain '
> + 'from the 0-day website to a directory in your '
> + 'home directory called `toolchains`).'),
> + metavar='cross_compile')
> +
> + parser.add_argument('--qemu_config',
> + help=('Takes a path to a path to a file containing '
> + 'a QemuArchParams object.'),
> + type=str, metavar='qemu_config')
> +
If (as noted below) this file needs to be in a subdirectory of the
kunit_tool directory, we should document this, or maybe make this path
relative to the kunit_tool directory.
> def add_build_opts(parser) -> None:
> parser.add_argument('--jobs',
> help='As in the make command, "Specifies the number of '
> @@ -270,7 +295,11 @@ def main(argv, linux=None):
> os.mkdir(cli_args.build_dir)
>
> if not linux:
> - linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir, kunitconfig_path=cli_args.kunitconfig)
> + linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> + kunitconfig_path=cli_args.kunitconfig,
> + arch=cli_args.arch,
> + cross_compile=cli_args.cross_compile,
> + qemu_config_path=cli_args.qemu_config)
>
> request = KunitRequest(cli_args.raw_output,
> cli_args.timeout,
> @@ -289,7 +318,11 @@ def main(argv, linux=None):
> os.mkdir(cli_args.build_dir)
>
> if not linux:
> - linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir, kunitconfig_path=cli_args.kunitconfig)
> + linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> + kunitconfig_path=cli_args.kunitconfig,
> + arch=cli_args.arch,
> + cross_compile=cli_args.cross_compile,
> + qemu_config_path=cli_args.qemu_config)
>
> request = KunitConfigRequest(cli_args.build_dir,
> cli_args.make_options)
> @@ -301,7 +334,11 @@ def main(argv, linux=None):
> sys.exit(1)
> elif cli_args.subcommand == 'build':
> if not linux:
> - linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir, kunitconfig_path=cli_args.kunitconfig)
> + linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> + kunitconfig_path=cli_args.kunitconfig,
> + arch=cli_args.arch,
> + cross_compile=cli_args.cross_compile,
> + qemu_config_path=cli_args.qemu_config)
>
> request = KunitBuildRequest(cli_args.jobs,
> cli_args.build_dir,
> @@ -315,7 +352,11 @@ def main(argv, linux=None):
> sys.exit(1)
> elif cli_args.subcommand == 'exec':
> if not linux:
> - linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir)
> + linux = kunit_kernel.LinuxSourceTree(cli_args.build_dir,
> + kunitconfig_path=cli_args.kunitconfig,
> + arch=cli_args.arch,
> + cross_compile=cli_args.cross_compile,
> + qemu_config_path=cli_args.qemu_config)
>
> exec_request = KunitExecRequest(cli_args.timeout,
> cli_args.build_dir,
> diff --git a/tools/testing/kunit/kunit_config.py b/tools/testing/kunit/kunit_config.py
> index 1e2683dcc0e7a..c77c7d2ef6220 100644
> --- a/tools/testing/kunit/kunit_config.py
> +++ b/tools/testing/kunit/kunit_config.py
> @@ -52,8 +52,13 @@ class Kconfig(object):
> return False
> return True
>
> + def merge_in_entries(self, other: 'Kconfig') -> None:
> + if other.is_subset_of(self):
> + return
> + self._entries = list(self.entries().union(other.entries()))
> +
> def write_to_file(self, path: str) -> None:
> - with open(path, 'w') as f:
> + with open(path, 'a+') as f:
> for entry in self.entries():
> f.write(str(entry) + '\n')
>
> diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
> index e22ade9d91ad5..2bd196fd69e5c 100644
> --- a/tools/testing/kunit/kunit_kernel.py
> +++ b/tools/testing/kunit/kunit_kernel.py
> @@ -6,23 +6,31 @@
> # Author: Felix Guo <felixguoxiuping@xxxxxxxxx>
> # Author: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
>
> +from __future__ import annotations
> +import importlib.util
> import logging
> import subprocess
> import os
> import shutil
> import signal
> from typing import Iterator
> +from typing import Optional
>
> from contextlib import ExitStack
>
> +from collections import namedtuple
> +
> import kunit_config
> import kunit_parser
> +import qemu_config
>
> KCONFIG_PATH = '.config'
> KUNITCONFIG_PATH = '.kunitconfig'
> DEFAULT_KUNITCONFIG_PATH = 'arch/um/configs/kunit_defconfig'
> BROKEN_ALLCONFIG_PATH = 'tools/testing/kunit/configs/broken_on_uml.config'
> OUTFILE_PATH = 'test.log'
> +ABS_TOOL_PATH = os.path.abspath(os.path.dirname(__file__))
> +QEMU_CONFIGS_DIR = os.path.join(ABS_TOOL_PATH, 'qemu_configs')
>
> def get_file_path(build_dir, default):
> if build_dir:
> @@ -40,6 +48,10 @@ class BuildError(Exception):
> class LinuxSourceTreeOperations(object):
> """An abstraction over command line operations performed on a source tree."""
>
> + def __init__(self, linux_arch: str, cross_compile: Optional[str]):
> + self._linux_arch = linux_arch
> + self._cross_compile = cross_compile
> +
> def make_mrproper(self) -> None:
> try:
> subprocess.check_output(['make', 'mrproper'], stderr=subprocess.STDOUT)
> @@ -48,12 +60,21 @@ class LinuxSourceTreeOperations(object):
> except subprocess.CalledProcessError as e:
> raise ConfigError(e.output.decode())
>
> + def make_arch_qemuconfig(self, kconfig: kunit_config.Kconfig) -> None:
> + pass
> +
> + def make_allyesconfig(self, build_dir, make_options) -> None:
> + raise ConfigError('Only the "um" arch is supported for alltests')
> +
> def make_olddefconfig(self, build_dir, make_options) -> None:
> - command = ['make', 'ARCH=um', 'olddefconfig']
> + command = ['make', 'ARCH=' + self._linux_arch, 'olddefconfig']
> + if self._cross_compile:
> + command += ['CROSS_COMPILE=' + self._cross_compile]
> if make_options:
> command.extend(make_options)
> if build_dir:
> command += ['O=' + build_dir]
> + print('Populating config with:\n$', ' '.join(command))
> try:
> subprocess.check_output(command, stderr=subprocess.STDOUT)
> except OSError as e:
> @@ -61,6 +82,79 @@ class LinuxSourceTreeOperations(object):
> except subprocess.CalledProcessError as e:
> raise ConfigError(e.output.decode())
>
> + def make(self, jobs, build_dir, make_options) -> None:
> + command = ['make', 'ARCH=' + self._linux_arch, '--jobs=' + str(jobs)]
> + if make_options:
> + command.extend(make_options)
> + if self._cross_compile:
> + command += ['CROSS_COMPILE=' + self._cross_compile]
> + if build_dir:
> + command += ['O=' + build_dir]
> + print('Building with:\n$', ' '.join(command))
> + try:
> + proc = subprocess.Popen(command,
> + stderr=subprocess.PIPE,
> + stdout=subprocess.DEVNULL)
> + except OSError as e:
> + raise BuildError('Could not call execute make: ' + str(e))
> + except subprocess.CalledProcessError as e:
> + raise BuildError(e.output)
> + _, stderr = proc.communicate()
> + if proc.returncode != 0:
> + raise BuildError(stderr.decode())
> + if stderr: # likely only due to build warnings
> + print(stderr.decode())
> +
> + def run(self, params, timeout, build_dir, outfile) -> None:
> + pass
> +
> +
> +class LinuxSourceTreeOperationsQemu(LinuxSourceTreeOperations):
> +
> + def __init__(self, qemu_arch_params: qemu_config.QemuArchParams, cross_compile: Optional[str]):
> + super().__init__(linux_arch=qemu_arch_params.linux_arch,
> + cross_compile=cross_compile)
> + self._qemuconfig = qemu_arch_params.qemuconfig
> + self._qemu_arch = qemu_arch_params.qemu_arch
> + self._kernel_path = qemu_arch_params.kernel_path
> + self._kernel_command_line = qemu_arch_params.kernel_command_line + ' kunit_shutdown=reboot'
> + self._extra_qemu_params = qemu_arch_params.extra_qemu_params
> +
> + def make_arch_qemuconfig(self, base_kunitconfig: kunit_config.Kconfig) -> None:
> + qemuconfig = kunit_config.Kconfig()
> + qemuconfig.parse_from_string(self._qemuconfig)
> + base_kunitconfig.merge_in_entries(qemuconfig)
> +
> + def run(self, params, timeout, build_dir, outfile):
> + kernel_path = os.path.join(build_dir, self._kernel_path)
> + qemu_command = ['qemu-system-' + self._qemu_arch,
> + '-nodefaults',
> + '-m', '1024',
> + '-kernel', kernel_path,
> + '-append', '\'' + ' '.join(params + [self._kernel_command_line]) + '\'',
> + '-no-reboot',
> + '-nographic',
> + '-serial stdio'] + self._extra_qemu_params
> + print('Running tests with:\n$', ' '.join(qemu_command))
> + with open(outfile, 'w') as output:
> + process = subprocess.Popen(' '.join(qemu_command),
> + stdin=subprocess.PIPE,
> + stdout=output,
> + stderr=subprocess.STDOUT,
> + text=True, shell=True)
> + try:
> + process.wait(timeout=timeout)
> + except Exception as e:
> + print(e)
> + process.terminate()
> + return process
> +
> +class LinuxSourceTreeOperationsUml(LinuxSourceTreeOperations):
> + """An abstraction over command line operations performed on a source tree."""
> +
> + def __init__(self, cross_compile=None):
> + super().__init__(linux_arch='um', cross_compile=cross_compile)
> +
> def make_allyesconfig(self, build_dir, make_options) -> None:
> kunit_parser.print_with_timestamp(
> 'Enabling all CONFIGs for UML...')
> @@ -83,32 +177,16 @@ class LinuxSourceTreeOperations(object):
> kunit_parser.print_with_timestamp(
> 'Starting Kernel with all configs takes a few minutes...')
>
> - def make(self, jobs, build_dir, make_options) -> None:
> - command = ['make', 'ARCH=um', '--jobs=' + str(jobs)]
> - if make_options:
> - command.extend(make_options)
> - if build_dir:
> - command += ['O=' + build_dir]
> - try:
> - proc = subprocess.Popen(command,
> - stderr=subprocess.PIPE,
> - stdout=subprocess.DEVNULL)
> - except OSError as e:
> - raise BuildError('Could not call make command: ' + str(e))
> - _, stderr = proc.communicate()
> - if proc.returncode != 0:
> - raise BuildError(stderr.decode())
> - if stderr: # likely only due to build warnings
> - print(stderr.decode())
> -
> - def linux_bin(self, params, timeout, build_dir) -> None:
> + def run(self, params, timeout, build_dir, outfile):
> """Runs the Linux UML binary. Must be named 'linux'."""
> linux_bin = get_file_path(build_dir, 'linux')
> outfile = get_outfile_path(build_dir)
> with open(outfile, 'w') as output:
> process = subprocess.Popen([linux_bin] + params,
> + stdin=subprocess.PIPE,
> stdout=output,
> - stderr=subprocess.STDOUT)
> + stderr=subprocess.STDOUT,
> + text=True)
> process.wait(timeout)
>
> def get_kconfig_path(build_dir) -> str:
> @@ -120,13 +198,49 @@ def get_kunitconfig_path(build_dir) -> str:
> def get_outfile_path(build_dir) -> str:
> return get_file_path(build_dir, OUTFILE_PATH)
>
> +def get_source_tree_ops(arch: str, cross_compile: Optional[str]) -> LinuxSourceTreeOperations:
> + config_path = os.path.join(QEMU_CONFIGS_DIR, arch + '.py')
> + if arch == 'um':
> + return LinuxSourceTreeOperationsUml(cross_compile=cross_compile)
> + elif os.path.isfile(config_path):
> + return get_source_tree_ops_from_qemu_config(config_path, cross_compile)[1]
> + else:
> + raise ConfigError(arch + ' is not a valid arch')
> +
> +def get_source_tree_ops_from_qemu_config(config_path: str,
> + cross_compile: Optional[str]) -> tuple[
> + str, LinuxSourceTreeOperations]:
> + abs_config_path = os.path.abspath(config_path)
> + if os.path.commonpath([ABS_TOOL_PATH, abs_config_path]) != ABS_TOOL_PATH:
> + raise ConfigError('Given QEMU config file is not in a child directory of KUnit tool.')
I really don't like this requirement: it feels very arbitrary and
undercuts the value of the --qemu_config option a bit: we almost might
as well keep everything in the QEMU_CONFIG_DIR.
I assume it's here because of the need to import the QemuArchParams
definition: I take it there's no convenient way to do that?
At the very least, let's document this restriction properly, as it was
a bit of a weird one I wasn't expecting. Then people can either put
their custom qemu configs in the qemu_configs/ directory, or in
something like a custom_qemu_configs/ one. And if we later can work
out a more convenient way of removing this restriction entirely, we
can do so.
> + relative_config_path = os.path.relpath(abs_config_path, ABS_TOOL_PATH)
> + spec = importlib.util.spec_from_file_location('.' + relative_config_path, config_path)
> + config = importlib.util.module_from_spec(spec)
> + # TODO(brendanhiggins@xxxxxxxxxx): I looked this up and apparently other
> + # Python projects have noted that pytype complains that "No attribute
> + # 'exec_module' on _importlib_modulespec._Loader". Disabling for now.
> + spec.loader.exec_module(config) # pytype: disable=attribute-error
> + return config.QEMU_ARCH.linux_arch, LinuxSourceTreeOperationsQemu(
> + config.QEMU_ARCH, cross_compile=cross_compile)
> +
> class LinuxSourceTree(object):
> """Represents a Linux kernel source tree with KUnit tests."""
>
> - def __init__(self, build_dir: str, load_config=True, kunitconfig_path='') -> None:
> + def __init__(
> + self,
> + build_dir: str,
> + load_config=True,
> + kunitconfig_path='',
> + arch=None,
> + cross_compile=None,
> + qemu_config_path=None) -> None:
> signal.signal(signal.SIGINT, self.signal_handler)
> -
> - self._ops = LinuxSourceTreeOperations()
> + if qemu_config_path:
> + self._arch, self._ops = get_source_tree_ops_from_qemu_config(
> + qemu_config_path, cross_compile)
> + else:
> + self._arch = 'um' if arch is None else arch
> + self._ops = get_source_tree_ops(self._arch, cross_compile)
>
> if not load_config:
> return
> @@ -170,8 +284,9 @@ class LinuxSourceTree(object):
> kconfig_path = get_kconfig_path(build_dir)
> if build_dir and not os.path.exists(build_dir):
> os.mkdir(build_dir)
> - self._kconfig.write_to_file(kconfig_path)
> try:
> + self._ops.make_arch_qemuconfig(self._kconfig)
> + self._kconfig.write_to_file(kconfig_path)
> self._ops.make_olddefconfig(build_dir, make_options)
> except ConfigError as e:
> logging.error(e)
> @@ -184,6 +299,7 @@ class LinuxSourceTree(object):
> if os.path.exists(kconfig_path):
> existing_kconfig = kunit_config.Kconfig()
> existing_kconfig.read_from_file(kconfig_path)
> + self._ops.make_arch_qemuconfig(self._kconfig)
> if not self._kconfig.is_subset_of(existing_kconfig):
> print('Regenerating .config ...')
> os.remove(kconfig_path)
> @@ -194,7 +310,7 @@ class LinuxSourceTree(object):
> print('Generating .config ...')
> return self.build_config(build_dir, make_options)
>
> - def build_um_kernel(self, alltests, jobs, build_dir, make_options) -> bool:
> + def build_kernel(self, alltests, jobs, build_dir, make_options) -> bool:
> try:
> if alltests:
> self._ops.make_allyesconfig(build_dir, make_options)
> @@ -211,8 +327,8 @@ class LinuxSourceTree(object):
> args.extend(['mem=1G', 'console=tty','kunit_shutdown=halt'])
> if filter_glob:
> args.append('kunit.filter_glob='+filter_glob)
> - self._ops.linux_bin(args, timeout, build_dir)
> outfile = get_outfile_path(build_dir)
> + self._ops.run(args, timeout, build_dir, outfile)
> subprocess.call(['stty', 'sane'])
> with open(outfile, 'r') as file:
> for line in file:
> diff --git a/tools/testing/kunit/kunit_tool_test.py b/tools/testing/kunit/kunit_tool_test.py
> index 2e809dd956a77..a3b7f68e1cf9f 100755
> --- a/tools/testing/kunit/kunit_tool_test.py
> +++ b/tools/testing/kunit/kunit_tool_test.py
> @@ -303,7 +303,7 @@ class KUnitMainTest(unittest.TestCase):
>
> self.linux_source_mock = mock.Mock()
> self.linux_source_mock.build_reconfig = mock.Mock(return_value=True)
> - self.linux_source_mock.build_um_kernel = mock.Mock(return_value=True)
> + self.linux_source_mock.build_kernel = mock.Mock(return_value=True)
> self.linux_source_mock.run_kernel = mock.Mock(return_value=all_passed_log)
>
> def test_config_passes_args_pass(self):
> @@ -314,7 +314,7 @@ class KUnitMainTest(unittest.TestCase):
> def test_build_passes_args_pass(self):
> kunit.main(['build'], self.linux_source_mock)
> self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 0)
> - self.linux_source_mock.build_um_kernel.assert_called_once_with(False, 8, '.kunit', None)
> + self.linux_source_mock.build_kernel.assert_called_once_with(False, 8, '.kunit', None)
> self.assertEqual(self.linux_source_mock.run_kernel.call_count, 0)
>
> def test_exec_passes_args_pass(self):
> @@ -396,7 +396,7 @@ class KUnitMainTest(unittest.TestCase):
> def test_build_builddir(self):
> build_dir = '.kunit'
> kunit.main(['build', '--build_dir', build_dir], self.linux_source_mock)
> - self.linux_source_mock.build_um_kernel.assert_called_once_with(False, 8, build_dir, None)
> + self.linux_source_mock.build_kernel.assert_called_once_with(False, 8, build_dir, None)
>
> def test_exec_builddir(self):
> build_dir = '.kunit'
> @@ -410,14 +410,22 @@ class KUnitMainTest(unittest.TestCase):
> mock_linux_init.return_value = self.linux_source_mock
> kunit.main(['run', '--kunitconfig=mykunitconfig'])
> # Just verify that we parsed and initialized it correctly here.
> - mock_linux_init.assert_called_once_with('.kunit', kunitconfig_path='mykunitconfig')
> + mock_linux_init.assert_called_once_with('.kunit',
> + kunitconfig_path='mykunitconfig',
> + arch='um',
> + cross_compile=None,
> + qemu_config_path=None)
>
> @mock.patch.object(kunit_kernel, 'LinuxSourceTree')
> def test_config_kunitconfig(self, mock_linux_init):
> mock_linux_init.return_value = self.linux_source_mock
> kunit.main(['config', '--kunitconfig=mykunitconfig'])
> # Just verify that we parsed and initialized it correctly here.
> - mock_linux_init.assert_called_once_with('.kunit', kunitconfig_path='mykunitconfig')
> + mock_linux_init.assert_called_once_with('.kunit',
> + kunitconfig_path='mykunitconfig',
> + arch='um',
> + cross_compile=None,
> + qemu_config_path=None)
>
> if __name__ == '__main__':
> unittest.main()
> diff --git a/tools/testing/kunit/qemu_config.py b/tools/testing/kunit/qemu_config.py
> new file mode 100644
> index 0000000000000..aff1fe0442dbc
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_config.py
> @@ -0,0 +1,17 @@
> +# SPDX-License-Identifier: GPL-2.0
> +#
> +# Collection of configs for building non-UML kernels and running them on QEMU.
> +#
> +# Copyright (C) 2021, Google LLC.
> +# Author: Brendan Higgins <brendanhiggins@xxxxxxxxxx>
> +
> +from collections import namedtuple
> +
> +
> +QemuArchParams = namedtuple('QemuArchParams', ['linux_arch',
> + 'qemuconfig',
> + 'qemu_arch',
> + 'kernel_path',
> + 'kernel_command_line',
> + 'extra_qemu_params'])
> +
Nit: newline at end of file.
> diff --git a/tools/testing/kunit/qemu_configs/alpha.py b/tools/testing/kunit/qemu_configs/alpha.py
> new file mode 100644
> index 0000000000000..2cc64f848ca2c
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/alpha.py
> @@ -0,0 +1,10 @@
> +from ..qemu_config import QemuArchParams
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='alpha',
> + qemuconfig='''
> +CONFIG_SERIAL_8250=y
> +CONFIG_SERIAL_8250_CONSOLE=y''',
> + qemu_arch='alpha',
> + kernel_path='arch/alpha/boot/vmlinux',
> + kernel_command_line='console=ttyS0',
> + extra_qemu_params=[''])
> diff --git a/tools/testing/kunit/qemu_configs/arm.py b/tools/testing/kunit/qemu_configs/arm.py
> new file mode 100644
> index 0000000000000..29a043b0531a0
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/arm.py
> @@ -0,0 +1,13 @@
> +from ..qemu_config import QemuArchParams
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='arm',
> + qemuconfig='''
> +CONFIG_ARCH_VIRT=y
> +CONFIG_SERIAL_AMBA_PL010=y
> +CONFIG_SERIAL_AMBA_PL010_CONSOLE=y
> +CONFIG_SERIAL_AMBA_PL011=y
> +CONFIG_SERIAL_AMBA_PL011_CONSOLE=y''',
> + qemu_arch='arm',
> + kernel_path='arch/arm/boot/zImage',
> + kernel_command_line='console=ttyAMA0',
> + extra_qemu_params=['-machine virt'])
> diff --git a/tools/testing/kunit/qemu_configs/arm64.py b/tools/testing/kunit/qemu_configs/arm64.py
> new file mode 100644
> index 0000000000000..1ba200bc99f0f
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/arm64.py
> @@ -0,0 +1,12 @@
> +from ..qemu_config import QemuArchParams
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='arm64',
> + qemuconfig='''
> +CONFIG_SERIAL_AMBA_PL010=y
> +CONFIG_SERIAL_AMBA_PL010_CONSOLE=y
> +CONFIG_SERIAL_AMBA_PL011=y
> +CONFIG_SERIAL_AMBA_PL011_CONSOLE=y''',
> + qemu_arch='aarch64',
> + kernel_path='arch/arm64/boot/Image.gz',
> + kernel_command_line='console=ttyAMA0',
> + extra_qemu_params=['-machine virt', '-cpu cortex-a57'])
> diff --git a/tools/testing/kunit/qemu_configs/i386.py b/tools/testing/kunit/qemu_configs/i386.py
> new file mode 100644
> index 0000000000000..3998af306468e
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/i386.py
> @@ -0,0 +1,10 @@
> +from ..qemu_config import QemuArchParams
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='i386',
> + qemuconfig='''
> +CONFIG_SERIAL_8250=y
> +CONFIG_SERIAL_8250_CONSOLE=y''',
> + qemu_arch='x86_64',
> + kernel_path='arch/x86/boot/bzImage',
> + kernel_command_line='console=ttyS0',
> + extra_qemu_params=[''])
> diff --git a/tools/testing/kunit/qemu_configs/powerpc.py b/tools/testing/kunit/qemu_configs/powerpc.py
> new file mode 100644
> index 0000000000000..46292ce9e368e
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/powerpc.py
> @@ -0,0 +1,12 @@
> +from ..qemu_config import QemuArchParams
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='powerpc',
> + qemuconfig='''
> +CONFIG_PPC64=y
> +CONFIG_SERIAL_8250=y
> +CONFIG_SERIAL_8250_CONSOLE=y
> +CONFIG_HVC_CONSOLE=y''',
> + qemu_arch='ppc64',
> + kernel_path='vmlinux',
> + kernel_command_line='console=ttyS0',
> + extra_qemu_params=['-M pseries', '-cpu power8'])
> diff --git a/tools/testing/kunit/qemu_configs/riscv.py b/tools/testing/kunit/qemu_configs/riscv.py
> new file mode 100644
> index 0000000000000..de8c62d465723
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/riscv.py
> @@ -0,0 +1,31 @@
> +from ..qemu_config import QemuArchParams
> +import os
> +import os.path
> +import sys
> +
> +GITHUB_OPENSBI_URL = 'https://github.com/qemu/qemu/raw/master/pc-bios/opensbi-riscv64-generic-fw_dynamic.bin'
> +OPENSBI_FILE = os.path.basename(GITHUB_OPENSBI_URL)
> +
> +if not os.path.isfile(OPENSBI_FILE):
> + print('\n\nOpenSBI file is not in the current working directory.\n'
> + 'Would you like me to download it for you from:\n' + GITHUB_OPENSBI_URL + ' ?\n')
> + response = input('yes/[no]: ')
> + if response.strip() == 'yes':
> + os.system('wget ' + GITHUB_OPENSBI_URL)
> + else:
> + sys.exit()
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='riscv',
> + qemuconfig='''
> +CONFIG_SOC_VIRT=y
> +CONFIG_SERIAL_8250=y
> +CONFIG_SERIAL_8250_CONSOLE=y
> +CONFIG_SERIAL_OF_PLATFORM=y
> +CONFIG_SERIAL_EARLYCON_RISCV_SBI=y''',
> + qemu_arch='riscv64',
> + kernel_path='arch/riscv/boot/Image',
> + kernel_command_line='console=ttyS0',
> + extra_qemu_params=[
> + '-machine virt',
> + '-cpu rv64',
> + '-bios opensbi-riscv64-generic-fw_dynamic.bin'])
> diff --git a/tools/testing/kunit/qemu_configs/s390.py b/tools/testing/kunit/qemu_configs/s390.py
> new file mode 100644
> index 0000000000000..04c90332f1098
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/s390.py
> @@ -0,0 +1,14 @@
> +from ..qemu_config import QemuArchParams
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='s390',
> + qemuconfig='''
> +CONFIG_EXPERT=y
> +CONFIG_TUNE_ZEC12=y
> +CONFIG_NUMA=y
> +CONFIG_MODULES=y''',
> + qemu_arch='s390x',
> + kernel_path='arch/s390/boot/bzImage',
> + kernel_command_line='console=ttyS0',
> + extra_qemu_params=[
> + '-machine s390-ccw-virtio',
> + '-cpu qemu',])
> diff --git a/tools/testing/kunit/qemu_configs/sparc.py b/tools/testing/kunit/qemu_configs/sparc.py
> new file mode 100644
> index 0000000000000..f26b5f27cc5a1
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/sparc.py
> @@ -0,0 +1,10 @@
> +from ..qemu_config import QemuArchParams
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='sparc',
> + qemuconfig='''
> +CONFIG_SERIAL_8250=y
> +CONFIG_SERIAL_8250_CONSOLE=y''',
> + qemu_arch='sparc',
> + kernel_path='arch/sparc/boot/zImage',
> + kernel_command_line='console=ttyS0 mem=256M',
> + extra_qemu_params=['-m 256'])
> diff --git a/tools/testing/kunit/qemu_configs/x86_64.py b/tools/testing/kunit/qemu_configs/x86_64.py
> new file mode 100644
> index 0000000000000..bd5ab733b92ac
> --- /dev/null
> +++ b/tools/testing/kunit/qemu_configs/x86_64.py
> @@ -0,0 +1,10 @@
> +from ..qemu_config import QemuArchParams
> +
> +QEMU_ARCH = QemuArchParams(linux_arch='x86_64',
> + qemuconfig='''
> +CONFIG_SERIAL_8250=y
> +CONFIG_SERIAL_8250_CONSOLE=y''',
> + qemu_arch='x86_64',
> + kernel_path='arch/x86/boot/bzImage',
> + kernel_command_line='console=ttyS0',
> + extra_qemu_params=[''])
> --
> 2.31.1.607.g51e8a6a459-goog
>
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