blob: 82379d2eda80a9f4ede912379a60d78a5cb5b1e1 [file] [log] [blame]
# -*- mode: python -*-
# virtme-configkernel: Configure a kernel for virtme
# Copyright © 2014 Andy Lutomirski
# Licensed under the GPLv2, which is available in the virtme distribution
# as a file called LICENSE with SHA-256 hash:
# 8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643
from typing import Optional
import argparse
import os
import shutil
import subprocess
import multiprocessing
from .. import architectures
uname = os.uname()
def make_parser():
parser = argparse.ArgumentParser(
description='Configure a kernel for virtme',
)
parser.add_argument('--arch', action='store', metavar='ARCHITECTURE',
default=uname.machine,
help='Target architecture')
g = parser.add_argument_group(title='Mode').add_mutually_exclusive_group()
g.add_argument('--allnoconfig', action='store_true',
help='Overwrite configuration with a virtme-suitable allnoconfig (unlikely to work)')
g.add_argument('--defconfig', action='store_true',
help='Overwrite configuration with a virtme-suitable defconfig')
g.add_argument('--update', action='store_true',
help='Update existing config for virtme')
return parser
_ARGPARSER = make_parser()
def arg_fail(message):
print(message)
_ARGPARSER.print_usage()
exit(1)
_GENERIC_CONFIG = [
'# Generic',
'CONFIG_UEVENT_HELPER=n', # Obsolete and slow
'CONFIG_VIRTIO=y',
'CONFIG_VIRTIO_PCI=y',
'CONFIG_VIRTIO_MMIO=y',
'CONFIG_NET=y',
'CONFIG_NET_CORE=y',
'CONFIG_NETDEVICES=y',
'CONFIG_NETWORK_FILESYSTEMS=y',
'CONFIG_INET=y',
'CONFIG_NET_9P=y',
'CONFIG_NET_9P_VIRTIO=y',
'CONFIG_9P_FS=y',
'CONFIG_VIRTIO_NET=y',
'CONFIG_CMDLINE_OVERRIDE=n',
'CONFIG_BINFMT_SCRIPT=y',
'CONFIG_SHMEM=y',
'CONFIG_TMPFS=y',
'CONFIG_UNIX=y',
'CONFIG_MODULE_SIG_FORCE=n',
'CONFIG_DEVTMPFS=y',
'CONFIG_TTY=y',
'CONFIG_VT=y',
'CONFIG_UNIX98_PTYS=y',
'CONFIG_EARLY_PRINTK=y',
'',
'# virtio-scsi support',
'CONFIG_BLOCK=y',
'CONFIG_SCSI_LOWLEVEL=y',
'CONFIG_SCSI=y',
'CONFIG_SCSI_VIRTIO=y',
'CONFIG_BLK_DEV_SD=y',
'',
'# virt-serial support',
'CONFIG_VIRTIO_CONSOLE=y',
'',
'# watchdog (useful for test scripts)',
'CONFIG_WATCHDOG=y',
'CONFIG_WATCHDOG_CORE=y',
'CONFIG_I6300ESB_WDT=y',
]
def main():
args = _ARGPARSER.parse_args()
if not os.path.isfile('scripts/kconfig/merge_config.sh'):
print('virtme-configkernel must be run in a kernel source directory')
return 1
arch = architectures.get(args.arch)
conf = (_GENERIC_CONFIG +
['# Arch-specific options'] +
arch.config_base())
if shutil.which('%s-linux-gnu-gcc' % arch.gccname):
conf.append('CONFIG_CROSS_COMPILE="%s-linux-gnu-"' % arch.gccname)
maketarget: Optional[str]
if args.allnoconfig:
maketarget = 'allnoconfig'
updatetarget = 'silentoldconfig'
elif args.defconfig:
maketarget = arch.defconfig_target
updatetarget = 'olddefconfig'
elif args.update:
maketarget = None
updatetarget = 'olddefconfig'
else:
arg_fail('No mode selected')
# TODO: Get rid of most of the noise and check the result.
# Set up an initial config
if maketarget:
subprocess.check_call(['make', 'ARCH=%s' % arch.linuxname, maketarget])
config = '.config'
# Check if KBUILD_OUTPUT is defined and if it's a directory
config_dir = os.environ.get('KBUILD_OUTPUT', '')
if config_dir and os.path.isdir(config_dir):
config = os.path.join(config_dir, config)
with open(config, 'ab') as conffile:
conffile.write('\n'.join(conf).encode('utf-8'))
subprocess.check_call(['make', 'ARCH=%s' % arch.linuxname, updatetarget])
print("Configured. Build with 'make ARCH=%s -j%d'" %
(arch.linuxname, multiprocessing.cpu_count()))
return 0
if __name__ == '__main__':
exit(main())