[Subtree] Removing import-layers directory

As part of the move to subtrees, need to bring all the import layers
content to the top level.

Change-Id: I4a163d10898cbc6e11c27f776f60e1a470049d8f
Signed-off-by: Dave Cobbley <david.j.cobbley@linux.intel.com>
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

1 files changed, 1307 insertions, 0 deletions

diff --git a/poky/scripts/runqemu b/poky/scripts/runqemu
new file mode 100755
index 000000000..d99849406
--- /dev/null
+++ b/poky/scripts/runqemu
@@ -0,0 +1,1307 @@
+#!/usr/bin/env python3
+
+# Handle running OE images standalone with QEMU
+#
+# Copyright (C) 2006-2011 Linux Foundation
+# Copyright (c) 2016 Wind River Systems, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+import os
+import sys
+import logging
+import subprocess
+import re
+import fcntl
+import shutil
+import glob
+import configparser
+
+class RunQemuError(Exception):
+    """Custom exception to raise on known errors."""
+    pass
+
+class OEPathError(RunQemuError):
+    """Custom Exception to give better guidance on missing binaries"""
+    def __init__(self, message):
+        super().__init__("In order for this script to dynamically infer paths\n \
+kernels or filesystem images, you either need bitbake in your PATH\n \
+or to source oe-init-build-env before running this script.\n\n \
+Dynamic path inference can be avoided by passing a *.qemuboot.conf to\n \
+runqemu, i.e. `runqemu /path/to/my-image-name.qemuboot.conf`\n\n %s" % message)
+
+
+def create_logger():
+    logger = logging.getLogger('runqemu')
+    logger.setLevel(logging.INFO)
+
+    # create console handler and set level to debug
+    ch = logging.StreamHandler()
+    ch.setLevel(logging.DEBUG)
+
+    # create formatter
+    formatter = logging.Formatter('%(name)s - %(levelname)s - %(message)s')
+
+    # add formatter to ch
+    ch.setFormatter(formatter)
+
+    # add ch to logger
+    logger.addHandler(ch)
+
+    return logger
+
+logger = create_logger()
+
+def print_usage():
+    print("""
+Usage: you can run this script with any valid combination
+of the following environment variables (in any order):
+  KERNEL - the kernel image file to use
+  ROOTFS - the rootfs image file or nfsroot directory to use
+  DEVICE_TREE - the device tree blob to use
+  MACHINE - the machine name (optional, autodetected from KERNEL filename if unspecified)
+  Simplified QEMU command-line options can be passed with:
+    nographic - disable video console
+    serial - enable a serial console on /dev/ttyS0
+    slirp - enable user networking, no root privileges is required
+    kvm - enable KVM when running x86/x86_64 (VT-capable CPU required)
+    kvm-vhost - enable KVM with vhost when running x86/x86_64 (VT-capable CPU required)
+    publicvnc - enable a VNC server open to all hosts
+    audio - enable audio
+    [*/]ovmf* - OVMF firmware file or base name for booting with UEFI
+  tcpserial=<port> - specify tcp serial port number
+  biosdir=<dir> - specify custom bios dir
+  biosfilename=<filename> - specify bios filename
+  qemuparams=<xyz> - specify custom parameters to QEMU
+  bootparams=<xyz> - specify custom kernel parameters during boot
+  help, -h, --help: print this text
+  -d, --debug: Enable debug output
+  -q, --quite: Hide most output except error messages
+
+Examples:
+  runqemu
+  runqemu qemuarm
+  runqemu tmp/deploy/images/qemuarm
+  runqemu tmp/deploy/images/qemux86/<qemuboot.conf>
+  runqemu qemux86-64 core-image-sato ext4
+  runqemu qemux86-64 wic-image-minimal wic
+  runqemu path/to/bzImage-qemux86.bin path/to/nfsrootdir/ serial
+  runqemu qemux86 iso/hddimg/wic.vmdk/wic.qcow2/wic.vdi/ramfs/cpio.gz...
+  runqemu qemux86 qemuparams="-m 256"
+  runqemu qemux86 bootparams="psplash=false"
+  runqemu path/to/<image>-<machine>.wic
+  runqemu path/to/<image>-<machine>.wic.vmdk
+""")
+
+def check_tun():
+    """Check /dev/net/tun"""
+    dev_tun = '/dev/net/tun'
+    if not os.path.exists(dev_tun):
+        raise RunQemuError("TUN control device %s is unavailable; you may need to enable TUN (e.g. sudo modprobe tun)" % dev_tun)
+
+    if not os.access(dev_tun, os.W_OK):
+        raise RunQemuError("TUN control device %s is not writable, please fix (e.g. sudo chmod 666 %s)" % (dev_tun, dev_tun))
+
+def check_libgl(qemu_bin):
+    cmd = 'ldd %s' % qemu_bin
+    logger.debug('Running %s...' % cmd)
+    need_gl = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8')
+    if re.search('libGLU', need_gl):
+        # We can't run without a libGL.so
+        libgl = False
+        check_files = (('/usr/lib/libGL.so', '/usr/lib/libGLU.so'), \
+            ('/usr/lib64/libGL.so', '/usr/lib64/libGLU.so'), \
+            ('/usr/lib/*-linux-gnu/libGL.so', '/usr/lib/*-linux-gnu/libGLU.so'))
+
+        for (f1, f2) in check_files:
+            if re.search('\*', f1):
+                for g1 in glob.glob(f1):
+                    if libgl:
+                        break
+                    if os.path.exists(g1):
+                        for g2 in glob.glob(f2):
+                            if os.path.exists(g2):
+                                libgl = True
+                                break
+                if libgl:
+                    break
+            else:
+                if os.path.exists(f1) and os.path.exists(f2):
+                    libgl = True
+                    break
+        if not libgl:
+            logger.error("You need libGL.so and libGLU.so to exist in your library path to run the QEMU emulator.")
+            logger.error("Ubuntu package names are: libgl1-mesa-dev and libglu1-mesa-dev.")
+            logger.error("Fedora package names are: mesa-libGL-devel mesa-libGLU-devel.")
+            raise RunQemuError('%s requires libGLU, but not found' % qemu_bin)
+
+def get_first_file(cmds):
+    """Return first file found in wildcard cmds"""
+    for cmd in cmds:
+        all_files = glob.glob(cmd)
+        if all_files:
+            for f in all_files:
+                if not os.path.isdir(f):
+                    return f
+    return ''
+
+def check_free_port(host, port):
+    """ Check whether the port is free or not """
+    import socket
+    from contextlib import closing
+
+    with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as sock:
+        if sock.connect_ex((host, port)) == 0:
+            # Port is open, so not free
+            return False
+        else:
+            # Port is not open, so free
+            return True
+
+class BaseConfig(object):
+    def __init__(self):
+        # The self.d saved vars from self.set(), part of them are from qemuboot.conf
+        self.d = {'QB_KERNEL_ROOT': '/dev/vda'}
+
+        # Supported env vars, add it here if a var can be got from env,
+        # and don't use os.getenv in the code.
+        self.env_vars = ('MACHINE',
+                        'ROOTFS',
+                        'KERNEL',
+                        'DEVICE_TREE',
+                        'DEPLOY_DIR_IMAGE',
+                        'OE_TMPDIR',
+                        'OECORE_NATIVE_SYSROOT',
+                        )
+
+        self.qemu_opt = ''
+        self.qemu_opt_script = ''
+        self.clean_nfs_dir = False
+        self.nfs_server = ''
+        self.rootfs = ''
+        # File name(s) of a OVMF firmware file or variable store,
+        # to be added with -drive if=pflash.
+        # Found in the same places as the rootfs, with or without one of
+        # these suffices: qcow2, bin.
+        # Setting one also adds "-vga std" because that is all that
+        # OVMF supports.
+        self.ovmf_bios = []
+        self.qemuboot = ''
+        self.qbconfload = False
+        self.kernel = ''
+        self.kernel_cmdline = ''
+        self.kernel_cmdline_script = ''
+        self.bootparams = ''
+        self.dtb = ''
+        self.fstype = ''
+        self.kvm_enabled = False
+        self.vhost_enabled = False
+        self.slirp_enabled = False
+        self.nfs_instance = 0
+        self.nfs_running = False
+        self.serialstdio = False
+        self.cleantap = False
+        self.saved_stty = ''
+        self.audio_enabled = False
+        self.tcpserial_portnum = ''
+        self.custombiosdir = ''
+        self.lock = ''
+        self.lock_descriptor = ''
+        self.bitbake_e = ''
+        self.snapshot = False
+        self.fstypes = ('ext2', 'ext3', 'ext4', 'jffs2', 'nfs', 'btrfs',
+                        'cpio.gz', 'cpio', 'ramfs', 'tar.bz2', 'tar.gz')
+        self.vmtypes = ('hddimg', 'hdddirect', 'wic', 'wic.vmdk',
+                        'wic.qcow2', 'wic.vdi', 'iso')
+        self.network_device = "-device e1000,netdev=net0,mac=@MAC@"
+        # Use different mac section for tap and slirp to avoid
+        # conflicts, e.g., when one is running with tap, the other is
+        # running with slirp.
+        # The last section is dynamic, which is for avoiding conflicts,
+        # when multiple qemus are running, e.g., when multiple tap or
+        # slirp qemus are running.
+        self.mac_tap = "52:54:00:12:34:"
+        self.mac_slirp = "52:54:00:12:35:"
+
+    def acquire_lock(self, error=True):
+        logger.debug("Acquiring lockfile %s..." % self.lock)
+        try:
+            self.lock_descriptor = open(self.lock, 'w')
+            fcntl.flock(self.lock_descriptor, fcntl.LOCK_EX|fcntl.LOCK_NB)
+        except Exception as e:
+            msg = "Acquiring lockfile %s failed: %s" % (self.lock, e)
+            if error:
+                logger.error(msg)
+            else:
+                logger.info(msg)
+            if self.lock_descriptor:
+                self.lock_descriptor.close()
+            return False
+        return True
+
+    def release_lock(self):
+        fcntl.flock(self.lock_descriptor, fcntl.LOCK_UN)
+        self.lock_descriptor.close()
+        os.remove(self.lock)
+
+    def get(self, key):
+        if key in self.d:
+            return self.d.get(key)
+        elif os.getenv(key):
+            return os.getenv(key)
+        else:
+            return ''
+
+    def set(self, key, value):
+        self.d[key] = value
+
+    def is_deploy_dir_image(self, p):
+        if os.path.isdir(p):
+            if not re.search('.qemuboot.conf$', '\n'.join(os.listdir(p)), re.M):
+                logger.debug("Can't find required *.qemuboot.conf in %s" % p)
+                return False
+            if not any(map(lambda name: '-image-' in name, os.listdir(p))):
+                logger.debug("Can't find *-image-* in %s" % p)
+                return False
+            return True
+        else:
+            return False
+
+    def check_arg_fstype(self, fst):
+        """Check and set FSTYPE"""
+        if fst not in self.fstypes + self.vmtypes:
+            logger.warn("Maybe unsupported FSTYPE: %s" % fst)
+        if not self.fstype or self.fstype == fst:
+            if fst == 'ramfs':
+                fst = 'cpio.gz'
+            if fst in ('tar.bz2', 'tar.gz'):
+                fst = 'nfs'
+            self.fstype = fst
+        else:
+            raise RunQemuError("Conflicting: FSTYPE %s and %s" % (self.fstype, fst))
+
+    def set_machine_deploy_dir(self, machine, deploy_dir_image):
+        """Set MACHINE and DEPLOY_DIR_IMAGE"""
+        logger.debug('MACHINE: %s' % machine)
+        self.set("MACHINE", machine)
+        logger.debug('DEPLOY_DIR_IMAGE: %s' % deploy_dir_image)
+        self.set("DEPLOY_DIR_IMAGE", deploy_dir_image)
+
+    def check_arg_nfs(self, p):
+        if os.path.isdir(p):
+            self.rootfs = p
+        else:
+            m = re.match('(.*):(.*)', p)
+            self.nfs_server = m.group(1)
+            self.rootfs = m.group(2)
+        self.check_arg_fstype('nfs')
+
+    def check_arg_path(self, p):
+        """
+        - Check whether it is <image>.qemuboot.conf or contains <image>.qemuboot.conf
+        - Check whether is a kernel file
+        - Check whether is a image file
+        - Check whether it is a nfs dir
+        - Check whether it is a OVMF flash file
+        """
+        if p.endswith('.qemuboot.conf'):
+            self.qemuboot = p
+            self.qbconfload = True
+        elif re.search('\.bin$', p) or re.search('bzImage', p) or \
+             re.search('zImage', p) or re.search('vmlinux', p) or \
+             re.search('fitImage', p) or re.search('uImage', p):
+            self.kernel =  p
+        elif os.path.exists(p) and (not os.path.isdir(p)) and '-image-' in os.path.basename(p):
+            self.rootfs = p
+            # Check filename against self.fstypes can hanlde <file>.cpio.gz,
+            # otherwise, its type would be "gz", which is incorrect.
+            fst = ""
+            for t in self.fstypes:
+                if p.endswith(t):
+                    fst = t
+                    break
+            if not fst:
+                m = re.search('.*\.(.*)$', self.rootfs)
+                if m:
+                    fst =  m.group(1)
+            if fst:
+                self.check_arg_fstype(fst)
+                qb = re.sub('\.' + fst + "$", '', self.rootfs)
+                qb = '%s%s' % (re.sub('\.rootfs$', '', qb), '.qemuboot.conf')
+                if os.path.exists(qb):
+                    self.qemuboot = qb
+                    self.qbconfload = True
+                else:
+                    logger.warn("%s doesn't exist" % qb)
+            else:
+                raise RunQemuError("Can't find FSTYPE from: %s" % p)
+
+        elif os.path.isdir(p) or re.search(':', p) and re.search('/', p):
+            if self.is_deploy_dir_image(p):
+                logger.debug('DEPLOY_DIR_IMAGE: %s' % p)
+                self.set("DEPLOY_DIR_IMAGE", p)
+            else:
+                logger.debug("Assuming %s is an nfs rootfs" % p)
+                self.check_arg_nfs(p)
+        elif os.path.basename(p).startswith('ovmf'):
+            self.ovmf_bios.append(p)
+        else:
+            raise RunQemuError("Unknown path arg %s" % p)
+
+    def check_arg_machine(self, arg):
+        """Check whether it is a machine"""
+        if self.get('MACHINE') == arg:
+            return
+        elif self.get('MACHINE') and self.get('MACHINE') != arg:
+            raise RunQemuError("Maybe conflicted MACHINE: %s vs %s" % (self.get('MACHINE'), arg))
+        elif re.search('/', arg):
+            raise RunQemuError("Unknown arg: %s" % arg)
+
+        logger.debug('Assuming MACHINE = %s' % arg)
+
+        # if we're running under testimage, or similarly as a child
+        # of an existing bitbake invocation, we can't invoke bitbake
+        # to validate the MACHINE setting and must assume it's correct...
+        # FIXME: testimage.bbclass exports these two variables into env,
+        # are there other scenarios in which we need to support being
+        # invoked by bitbake?
+        deploy = self.get('DEPLOY_DIR_IMAGE')
+        bbchild = deploy and self.get('OE_TMPDIR')
+        if bbchild:
+            self.set_machine_deploy_dir(arg, deploy)
+            return
+        # also check whether we're running under a sourced toolchain
+        # environment file
+        if self.get('OECORE_NATIVE_SYSROOT'):
+            self.set("MACHINE", arg)
+            return
+
+        cmd = 'MACHINE=%s bitbake -e' % arg
+        logger.info('Running %s...' % cmd)
+        self.bitbake_e = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8')
+        # bitbake -e doesn't report invalid MACHINE as an error, so
+        # let's check DEPLOY_DIR_IMAGE to make sure that it is a valid
+        # MACHINE.
+        s = re.search('^DEPLOY_DIR_IMAGE="(.*)"', self.bitbake_e, re.M)
+        if s:
+            deploy_dir_image = s.group(1)
+        else:
+            raise RunQemuError("bitbake -e %s" % self.bitbake_e)
+        if self.is_deploy_dir_image(deploy_dir_image):
+            self.set_machine_deploy_dir(arg, deploy_dir_image)
+        else:
+            logger.error("%s not a directory valid DEPLOY_DIR_IMAGE" % deploy_dir_image)
+            self.set("MACHINE", arg)
+
+    def check_args(self):
+        for debug in ("-d", "--debug"):
+            if debug in sys.argv:
+                logger.setLevel(logging.DEBUG)
+                sys.argv.remove(debug)
+
+        for quiet in ("-q", "--quiet"):
+            if quiet in sys.argv:
+                logger.setLevel(logging.ERROR)
+                sys.argv.remove(quiet)
+
+        unknown_arg = ""
+        for arg in sys.argv[1:]:
+            if arg in self.fstypes + self.vmtypes:
+                self.check_arg_fstype(arg)
+            elif arg == 'nographic':
+                self.qemu_opt_script += ' -nographic'
+                self.kernel_cmdline_script += ' console=ttyS0'
+            elif arg == 'serial':
+                self.kernel_cmdline_script += ' console=ttyS0'
+                self.serialstdio = True
+            elif arg == 'audio':
+                logger.info("Enabling audio in qemu")
+                logger.info("Please install sound drivers in linux host")
+                self.audio_enabled = True
+            elif arg == 'kvm':
+                self.kvm_enabled = True
+            elif arg == 'kvm-vhost':
+                self.vhost_enabled = True
+            elif arg == 'slirp':
+                self.slirp_enabled = True
+            elif arg == 'snapshot':
+                self.snapshot = True
+            elif arg == 'publicvnc':
+                self.qemu_opt_script += ' -vnc :0'
+            elif arg.startswith('tcpserial='):
+                self.tcpserial_portnum = arg[len('tcpserial='):]
+            elif arg.startswith('biosdir='):
+                self.custombiosdir = arg[len('biosdir='):]
+            elif arg.startswith('biosfilename='):
+                self.qemu_opt_script += ' -bios %s' % arg[len('biosfilename='):]
+            elif arg.startswith('qemuparams='):
+                self.qemu_opt_script += ' %s' % arg[len('qemuparams='):]
+            elif arg.startswith('bootparams='):
+                self.bootparams = arg[len('bootparams='):]
+            elif os.path.exists(arg) or (re.search(':', arg) and re.search('/', arg)):
+                self.check_arg_path(os.path.abspath(arg))
+            elif re.search(r'-image-|-image$', arg):
+                # Lazy rootfs
+                self.rootfs = arg
+            elif arg.startswith('ovmf'):
+                self.ovmf_bios.append(arg)
+            else:
+                # At last, assume it is the MACHINE
+                if (not unknown_arg) or unknown_arg == arg:
+                    unknown_arg = arg
+                else:
+                    raise RunQemuError("Can't handle two unknown args: %s %s\n"
+                                       "Try 'runqemu help' on how to use it" % \
+                                        (unknown_arg, arg))
+        # Check to make sure it is a valid machine
+        if unknown_arg:
+            if self.get('MACHINE') == unknown_arg:
+                return
+            if self.get('DEPLOY_DIR_IMAGE'):
+                machine = os.path.basename(self.get('DEPLOY_DIR_IMAGE'))
+                if unknown_arg == machine:
+                    self.set("MACHINE", machine)
+                    return
+
+            self.check_arg_machine(unknown_arg)
+
+        if not (self.get('DEPLOY_DIR_IMAGE') or self.qbconfload):
+            self.load_bitbake_env()
+            s = re.search('^DEPLOY_DIR_IMAGE="(.*)"', self.bitbake_e, re.M)
+            if s:
+                self.set("DEPLOY_DIR_IMAGE", s.group(1))
+
+    def check_kvm(self):
+        """Check kvm and kvm-host"""
+        if not (self.kvm_enabled or self.vhost_enabled):
+            self.qemu_opt_script += ' %s %s' % (self.get('QB_MACHINE'), self.get('QB_CPU'))
+            return
+
+        if not self.get('QB_CPU_KVM'):
+            raise RunQemuError("QB_CPU_KVM is NULL, this board doesn't support kvm")
+
+        self.qemu_opt_script += ' %s %s' % (self.get('QB_MACHINE'), self.get('QB_CPU_KVM'))
+        yocto_kvm_wiki = "https://wiki.yoctoproject.org/wiki/How_to_enable_KVM_for_Poky_qemu"
+        yocto_paravirt_kvm_wiki = "https://wiki.yoctoproject.org/wiki/Running_an_x86_Yocto_Linux_image_under_QEMU_KVM"
+        dev_kvm = '/dev/kvm'
+        dev_vhost = '/dev/vhost-net'
+        with open('/proc/cpuinfo', 'r') as f:
+            kvm_cap = re.search('vmx|svm', "".join(f.readlines()))
+        if not kvm_cap:
+            logger.error("You are trying to enable KVM on a cpu without VT support.")
+            logger.error("Remove kvm from the command-line, or refer:")
+            raise RunQemuError(yocto_kvm_wiki)
+
+        if not os.path.exists(dev_kvm):
+            logger.error("Missing KVM device. Have you inserted kvm modules?")
+            logger.error("For further help see:")
+            raise RunQemuError(yocto_kvm_wiki)
+
+        if os.access(dev_kvm, os.W_OK|os.R_OK):
+            self.qemu_opt_script += ' -enable-kvm'
+            if self.get('MACHINE') == "qemux86":
+                # Workaround for broken APIC window on pre 4.15 host kernels which causes boot hangs
+                # See YOCTO #12301
+                # On 64 bit we use x2apic
+                self.kernel_cmdline_script += " clocksource=kvm-clock hpet=disable noapic nolapic"
+        else:
+            logger.error("You have no read or write permission on /dev/kvm.")
+            logger.error("Please change the ownership of this file as described at:")
+            raise RunQemuError(yocto_kvm_wiki)
+
+        if self.vhost_enabled:
+            if not os.path.exists(dev_vhost):
+                logger.error("Missing virtio net device. Have you inserted vhost-net module?")
+                logger.error("For further help see:")
+                raise RunQemuError(yocto_paravirt_kvm_wiki)
+
+        if not os.access(dev_kvm, os.W_OK|os.R_OK):
+                logger.error("You have no read or write permission on /dev/vhost-net.")
+                logger.error("Please change the ownership of this file as described at:")
+                raise RunQemuError(yocto_kvm_wiki)
+
+    def check_fstype(self):
+        """Check and setup FSTYPE"""
+        if not self.fstype:
+            fstype = self.get('QB_DEFAULT_FSTYPE')
+            if fstype:
+                self.fstype = fstype
+            else:
+                raise RunQemuError("FSTYPE is NULL!")
+
+    def check_rootfs(self):
+        """Check and set rootfs"""
+
+        if self.fstype == "none":
+            return
+
+        if self.get('ROOTFS'):
+            if not self.rootfs:
+                self.rootfs = self.get('ROOTFS')
+            elif self.get('ROOTFS') != self.rootfs:
+                raise RunQemuError("Maybe conflicted ROOTFS: %s vs %s" % (self.get('ROOTFS'), self.rootfs))
+
+        if self.fstype == 'nfs':
+            return
+
+        if self.rootfs and not os.path.exists(self.rootfs):
+            # Lazy rootfs
+            self.rootfs = "%s/%s-%s.%s" % (self.get('DEPLOY_DIR_IMAGE'),
+                    self.rootfs, self.get('MACHINE'),
+                    self.fstype)
+        elif not self.rootfs:
+            cmd_name = '%s/%s*.%s' % (self.get('DEPLOY_DIR_IMAGE'), self.get('IMAGE_NAME'), self.fstype)
+            cmd_link = '%s/%s*.%s' % (self.get('DEPLOY_DIR_IMAGE'), self.get('IMAGE_LINK_NAME'), self.fstype)
+            cmds = (cmd_name, cmd_link)
+            self.rootfs = get_first_file(cmds)
+            if not self.rootfs:
+                raise RunQemuError("Failed to find rootfs: %s or %s" % cmds)
+
+        if not os.path.exists(self.rootfs):
+            raise RunQemuError("Can't find rootfs: %s" % self.rootfs)
+
+    def check_ovmf(self):
+        """Check and set full path for OVMF firmware and variable file(s)."""
+
+        for index, ovmf in enumerate(self.ovmf_bios):
+            if os.path.exists(ovmf):
+                continue
+            for suffix in ('qcow2', 'bin'):
+                path = '%s/%s.%s' % (self.get('DEPLOY_DIR_IMAGE'), ovmf, suffix)
+                if os.path.exists(path):
+                    self.ovmf_bios[index] = path
+                    break
+            else:
+                raise RunQemuError("Can't find OVMF firmware: %s" % ovmf)
+
+    def check_kernel(self):
+        """Check and set kernel"""
+        # The vm image doesn't need a kernel
+        if self.fstype in self.vmtypes:
+            return
+
+        # See if the user supplied a KERNEL option
+        if self.get('KERNEL'):
+            self.kernel = self.get('KERNEL')
+
+        # QB_DEFAULT_KERNEL is always a full file path
+        kernel_name = os.path.basename(self.get('QB_DEFAULT_KERNEL'))
+
+        # The user didn't want a kernel to be loaded
+        if kernel_name == "none" and not self.kernel:
+            return
+
+        deploy_dir_image = self.get('DEPLOY_DIR_IMAGE')
+        if not self.kernel:
+            kernel_match_name = "%s/%s" % (deploy_dir_image, kernel_name)
+            kernel_match_link = "%s/%s" % (deploy_dir_image, self.get('KERNEL_IMAGETYPE'))
+            kernel_startswith = "%s/%s*" % (deploy_dir_image, self.get('KERNEL_IMAGETYPE'))
+            cmds = (kernel_match_name, kernel_match_link, kernel_startswith)
+            self.kernel = get_first_file(cmds)
+            if not self.kernel:
+                raise RunQemuError('KERNEL not found: %s, %s or %s' % cmds)
+
+        if not os.path.exists(self.kernel):
+            raise RunQemuError("KERNEL %s not found" % self.kernel)
+
+    def check_dtb(self):
+        """Check and set dtb"""
+        # Did the user specify a device tree?
+        if self.get('DEVICE_TREE'):
+            self.dtb = self.get('DEVICE_TREE')
+            if not os.path.exists(self.dtb):
+                raise RunQemuError('Specified DTB not found: %s' % self.dtb)
+            return
+
+        dtb = self.get('QB_DTB')
+        if dtb:
+            deploy_dir_image = self.get('DEPLOY_DIR_IMAGE')
+            cmd_match = "%s/%s" % (deploy_dir_image, dtb)
+            cmd_startswith = "%s/%s*" % (deploy_dir_image, dtb)
+            cmd_wild = "%s/*.dtb" % deploy_dir_image
+            cmds = (cmd_match, cmd_startswith, cmd_wild)
+            self.dtb = get_first_file(cmds)
+            if not os.path.exists(self.dtb):
+                raise RunQemuError('DTB not found: %s, %s or %s' % cmds)
+
+    def check_biosdir(self):
+        """Check custombiosdir"""
+        if not self.custombiosdir:
+            return
+
+        biosdir = ""
+        biosdir_native = "%s/%s" % (self.get('STAGING_DIR_NATIVE'), self.custombiosdir)
+        biosdir_host = "%s/%s" % (self.get('STAGING_DIR_HOST'), self.custombiosdir)
+        for i in (self.custombiosdir, biosdir_native, biosdir_host):
+            if os.path.isdir(i):
+                biosdir = i
+                break
+
+        if biosdir:
+            logger.debug("Assuming biosdir is: %s" % biosdir)
+            self.qemu_opt_script += ' -L %s' % biosdir
+        else:
+            logger.error("Custom BIOS directory not found. Tried: %s, %s, and %s" % (self.custombiosdir, biosdir_native, biosdir_host))
+            raise RunQemuError("Invalid custombiosdir: %s" % self.custombiosdir)
+
+    def check_mem(self):
+        s = re.search('-m +([0-9]+)', self.qemu_opt_script)
+        if s:
+            self.set('QB_MEM', '-m %s' % s.group(1))
+        elif not self.get('QB_MEM'):
+            logger.info('QB_MEM is not set, use 512M by default')
+            self.set('QB_MEM', '-m 512')
+
+        self.kernel_cmdline_script += ' mem=%s' % self.get('QB_MEM').replace('-m','').strip() + 'M'
+        self.qemu_opt_script += ' %s' % self.get('QB_MEM')
+
+    def check_tcpserial(self):
+        if self.tcpserial_portnum:
+            if self.get('QB_TCPSERIAL_OPT'):
+                self.qemu_opt_script += ' ' + self.get('QB_TCPSERIAL_OPT').replace('@PORT@', self.tcpserial_portnum)
+            else:
+                self.qemu_opt_script += ' -serial tcp:127.0.0.1:%s' % self.tcpserial_portnum
+
+    def check_and_set(self):
+        """Check configs sanity and set when needed"""
+        self.validate_paths()
+        if not self.slirp_enabled:
+            check_tun()
+        # Check audio
+        if self.audio_enabled:
+            if not self.get('QB_AUDIO_DRV'):
+                raise RunQemuError("QB_AUDIO_DRV is NULL, this board doesn't support audio")
+            if not self.get('QB_AUDIO_OPT'):
+                logger.warn('QB_AUDIO_OPT is NULL, you may need define it to make audio work')
+            else:
+                self.qemu_opt_script += ' %s' % self.get('QB_AUDIO_OPT')
+            os.putenv('QEMU_AUDIO_DRV', self.get('QB_AUDIO_DRV'))
+        else:
+            os.putenv('QEMU_AUDIO_DRV', 'none')
+
+        self.check_kvm()
+        self.check_fstype()
+        self.check_rootfs()
+        self.check_ovmf()
+        self.check_kernel()
+        self.check_dtb()
+        self.check_biosdir()
+        self.check_mem()
+        self.check_tcpserial()
+
+    def read_qemuboot(self):
+        if not self.qemuboot:
+            if self.get('DEPLOY_DIR_IMAGE'):
+                deploy_dir_image = self.get('DEPLOY_DIR_IMAGE')
+            else:
+                logger.warn("Can't find qemuboot conf file, DEPLOY_DIR_IMAGE is NULL!")
+                return
+
+            if self.rootfs and not os.path.exists(self.rootfs):
+                # Lazy rootfs
+                machine = self.get('MACHINE')
+                if not machine:
+                    machine = os.path.basename(deploy_dir_image)
+                self.qemuboot = "%s/%s-%s.qemuboot.conf" % (deploy_dir_image,
+                        self.rootfs, machine)
+            else:
+                cmd = 'ls -t %s/*.qemuboot.conf' %  deploy_dir_image
+                logger.debug('Running %s...' % cmd)
+                try:
+                    qbs = subprocess.check_output(cmd, shell=True).decode('utf-8')
+                except subprocess.CalledProcessError as err:
+                    raise RunQemuError(err)
+                if qbs:
+                    for qb in qbs.split():
+                        # Don't use initramfs when other choices unless fstype is ramfs
+                        if '-initramfs-' in os.path.basename(qb) and self.fstype != 'cpio.gz':
+                                continue
+                        self.qemuboot = qb
+                        break
+                    if not self.qemuboot:
+                        # Use the first one when no choice
+                        self.qemuboot = qbs.split()[0]
+                    self.qbconfload = True
+
+        if not self.qemuboot:
+            # If we haven't found a .qemuboot.conf at this point it probably
+            # doesn't exist, continue without
+            return
+
+        if not os.path.exists(self.qemuboot):
+            raise RunQemuError("Failed to find %s (wrong image name or BSP does not support running under qemu?)." % self.qemuboot)
+
+        logger.debug('CONFFILE: %s' % self.qemuboot)
+
+        cf = configparser.ConfigParser()
+        cf.read(self.qemuboot)
+        for k, v in cf.items('config_bsp'):
+            k_upper = k.upper()
+            if v.startswith("../"):
+                v = os.path.abspath(os.path.dirname(self.qemuboot) + "/" + v)
+            elif v == ".":
+                v = os.path.dirname(self.qemuboot)
+            self.set(k_upper, v)
+
+    def validate_paths(self):
+        """Ensure all relevant path variables are set"""
+        # When we're started with a *.qemuboot.conf arg assume that image
+        # artefacts are relative to that file, rather than in whatever
+        # directory DEPLOY_DIR_IMAGE in the conf file points to.
+        if self.qbconfload:
+            imgdir = os.path.realpath(os.path.dirname(self.qemuboot))
+            if imgdir != os.path.realpath(self.get('DEPLOY_DIR_IMAGE')):
+                logger.info('Setting DEPLOY_DIR_IMAGE to folder containing %s (%s)' % (self.qemuboot, imgdir))
+                self.set('DEPLOY_DIR_IMAGE', imgdir)
+
+        # If the STAGING_*_NATIVE directories from the config file don't exist
+        # and we're in a sourced OE build directory try to extract the paths
+        # from `bitbake -e`
+        havenative = os.path.exists(self.get('STAGING_DIR_NATIVE')) and \
+            os.path.exists(self.get('STAGING_BINDIR_NATIVE'))
+
+        if not havenative:
+            if not self.bitbake_e:
+                self.load_bitbake_env()
+
+            if self.bitbake_e:
+                native_vars = ['STAGING_DIR_NATIVE']
+                for nv in native_vars:
+                    s = re.search('^%s="(.*)"' % nv, self.bitbake_e, re.M)
+                    if s and s.group(1) != self.get(nv):
+                        logger.info('Overriding conf file setting of %s to %s from Bitbake environment' % (nv, s.group(1)))
+                        self.set(nv, s.group(1))
+            else:
+                # when we're invoked from a running bitbake instance we won't
+                # be able to call `bitbake -e`, then try:
+                # - get OE_TMPDIR from environment and guess paths based on it
+                # - get OECORE_NATIVE_SYSROOT from environment (for sdk)
+                tmpdir = self.get('OE_TMPDIR')
+                oecore_native_sysroot = self.get('OECORE_NATIVE_SYSROOT')
+                if tmpdir:
+                    logger.info('Setting STAGING_DIR_NATIVE and STAGING_BINDIR_NATIVE relative to OE_TMPDIR (%s)' % tmpdir)
+                    hostos, _, _, _, machine = os.uname()
+                    buildsys = '%s-%s' % (machine, hostos.lower())
+                    staging_dir_native = '%s/sysroots/%s' % (tmpdir, buildsys)
+                    self.set('STAGING_DIR_NATIVE', staging_dir_native)
+                elif oecore_native_sysroot:
+                    logger.info('Setting STAGING_DIR_NATIVE to OECORE_NATIVE_SYSROOT (%s)' % oecore_native_sysroot)
+                    self.set('STAGING_DIR_NATIVE', oecore_native_sysroot)
+                if self.get('STAGING_DIR_NATIVE'):
+                    # we have to assume that STAGING_BINDIR_NATIVE is at usr/bin
+                    staging_bindir_native = '%s/usr/bin' % self.get('STAGING_DIR_NATIVE')
+                    logger.info('Setting STAGING_BINDIR_NATIVE to %s' % staging_bindir_native)
+                    self.set('STAGING_BINDIR_NATIVE', '%s/usr/bin' % self.get('STAGING_DIR_NATIVE'))
+
+    def print_config(self):
+        logger.info('Continuing with the following parameters:\n')
+        if not self.fstype in self.vmtypes:
+            print('KERNEL: [%s]' % self.kernel)
+            if self.dtb:
+                print('DTB: [%s]' % self.dtb)
+        print('MACHINE: [%s]' % self.get('MACHINE'))
+        print('FSTYPE: [%s]' % self.fstype)
+        if self.fstype  == 'nfs':
+            print('NFS_DIR: [%s]' % self.rootfs)
+        else:
+            print('ROOTFS: [%s]' % self.rootfs)
+        if self.ovmf_bios:
+            print('OVMF: %s' % self.ovmf_bios)
+        print('CONFFILE: [%s]' % self.qemuboot)
+        print('')
+
+    def setup_nfs(self):
+        if not self.nfs_server:
+            if self.slirp_enabled:
+                self.nfs_server = '10.0.2.2'
+            else:
+                self.nfs_server = '192.168.7.1'
+
+        # Figure out a new nfs_instance to allow multiple qemus running.
+        # CentOS 7.1's ps doesn't print full command line without "ww"
+        # when invoke by subprocess.Popen().
+        cmd = "ps auxww"
+        ps = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8')
+        pattern = '/bin/unfsd .* -i .*\.pid -e .*/exports([0-9]+) '
+        all_instances = re.findall(pattern, ps, re.M)
+        if all_instances:
+            all_instances.sort(key=int)
+            self.nfs_instance = int(all_instances.pop()) + 1
+
+        nfsd_port = 3049 + 2 * self.nfs_instance
+        mountd_port = 3048 + 2 * self.nfs_instance
+
+        # Export vars for runqemu-export-rootfs
+        export_dict = {
+            'NFS_INSTANCE': self.nfs_instance,
+            'NFSD_PORT': nfsd_port,
+            'MOUNTD_PORT': mountd_port,
+        }
+        for k, v in export_dict.items():
+            # Use '%s' since they are integers
+            os.putenv(k, '%s' % v)
+
+        self.unfs_opts="nfsvers=3,port=%s,udp,mountport=%s" % (nfsd_port, mountd_port)
+
+        # Extract .tar.bz2 or .tar.bz if no nfs dir
+        if not (self.rootfs and os.path.isdir(self.rootfs)):
+            src_prefix = '%s/%s' % (self.get('DEPLOY_DIR_IMAGE'), self.get('IMAGE_LINK_NAME'))
+            dest = "%s-nfsroot" % src_prefix
+            if os.path.exists('%s.pseudo_state' % dest):
+                logger.info('Use %s as NFS_DIR' % dest)
+                self.rootfs = dest
+            else:
+                src = ""
+                src1 = '%s.tar.bz2' % src_prefix
+                src2 = '%s.tar.gz' % src_prefix
+                if os.path.exists(src1):
+                    src = src1
+                elif os.path.exists(src2):
+                    src = src2
+                if not src:
+                    raise RunQemuError("No NFS_DIR is set, and can't find %s or %s to extract" % (src1, src2))
+                logger.info('NFS_DIR not found, extracting %s to %s' % (src, dest))
+                cmd = 'runqemu-extract-sdk %s %s' % (src, dest)
+                logger.info('Running %s...' % cmd)
+                if subprocess.call(cmd, shell=True) != 0:
+                    raise RunQemuError('Failed to run %s' % cmd)
+                self.clean_nfs_dir = True
+                self.rootfs = dest
+
+        # Start the userspace NFS server
+        cmd = 'runqemu-export-rootfs start %s' % self.rootfs
+        logger.info('Running %s...' % cmd)
+        if subprocess.call(cmd, shell=True) != 0:
+            raise RunQemuError('Failed to run %s' % cmd)
+
+        self.nfs_running = True
+
+    def setup_slirp(self):
+        """Setup user networking"""
+
+        if self.fstype == 'nfs':
+            self.setup_nfs()
+        self.kernel_cmdline_script += ' ip=dhcp'
+        # Port mapping
+        hostfwd = ",hostfwd=tcp::2222-:22,hostfwd=tcp::2323-:23"
+        qb_slirp_opt_default = "-netdev user,id=net0%s,tftp=%s" % (hostfwd, self.get('DEPLOY_DIR_IMAGE'))
+        qb_slirp_opt = self.get('QB_SLIRP_OPT') or qb_slirp_opt_default
+        # Figure out the port
+        ports = re.findall('hostfwd=[^-]*:([0-9]+)-[^,-]*', qb_slirp_opt)
+        ports = [int(i) for i in ports]
+        mac = 2
+        # Find a free port to avoid conflicts
+        for p in ports[:]:
+            p_new = p
+            while not check_free_port('localhost', p_new):
+                p_new += 1
+                mac += 1
+                while p_new in ports:
+                        p_new += 1
+                        mac += 1
+            if p != p_new:
+                ports.append(p_new)
+                qb_slirp_opt = re.sub(':%s-' % p, ':%s-' % p_new, qb_slirp_opt)
+                logger.info("Port forward changed: %s -> %s" % (p, p_new))
+        mac = "%s%02x" % (self.mac_slirp, mac)
+        self.set('NETWORK_CMD', '%s %s' % (self.network_device.replace('@MAC@', mac), qb_slirp_opt))
+        # Print out port foward
+        hostfwd = re.findall('(hostfwd=[^,]*)', qb_slirp_opt)
+        if hostfwd:
+            logger.info('Port forward: %s' % ' '.join(hostfwd))
+
+    def setup_tap(self):
+        """Setup tap"""
+
+        # This file is created when runqemu-gen-tapdevs creates a bank of tap
+        # devices, indicating that the user should not bring up new ones using
+        # sudo.
+        nosudo_flag = '/etc/runqemu-nosudo'
+        self.qemuifup = shutil.which('runqemu-ifup')
+        self.qemuifdown = shutil.which('runqemu-ifdown')
+        ip = shutil.which('ip')
+        lockdir = "/tmp/qemu-tap-locks"
+
+        if not (self.qemuifup and self.qemuifdown and ip):
+            logger.error("runqemu-ifup: %s" % self.qemuifup)
+            logger.error("runqemu-ifdown: %s" % self.qemuifdown)
+            logger.error("ip: %s" % ip)
+            raise OEPathError("runqemu-ifup, runqemu-ifdown or ip not found")
+
+        if not os.path.exists(lockdir):
+            # There might be a race issue when multi runqemu processess are
+            # running at the same time.
+            try:
+                os.mkdir(lockdir)
+                os.chmod(lockdir, 0o777)
+            except FileExistsError:
+                pass
+
+        cmd = '%s link' % ip
+        logger.debug('Running %s...' % cmd)
+        ip_link = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8')
+        # Matches line like: 6: tap0: <foo>
+        possibles = re.findall('^[0-9]+: +(tap[0-9]+): <.*', ip_link, re.M)
+        tap = ""
+        for p in possibles:
+            lockfile = os.path.join(lockdir, p)
+            if os.path.exists('%s.skip' % lockfile):
+                logger.info('Found %s.skip, skipping %s' % (lockfile, p))
+                continue
+            self.lock = lockfile + '.lock'
+            if self.acquire_lock(error=False):
+                tap = p
+                logger.info("Using preconfigured tap device %s" % tap)
+                logger.info("If this is not intended, touch %s.skip to make runqemu skip %s." %(lockfile, tap))
+                break
+
+        if not tap:
+            if os.path.exists(nosudo_flag):
+                logger.error("Error: There are no available tap devices to use for networking,")
+                logger.error("and I see %s exists, so I am not going to try creating" % nosudo_flag)
+                raise RunQemuError("a new one with sudo.")
+
+            gid = os.getgid()
+            uid = os.getuid()
+            logger.info("Setting up tap interface under sudo")
+            cmd = 'sudo %s %s %s %s' % (self.qemuifup, uid, gid, self.bindir_native)
+            tap = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE).stdout.read().decode('utf-8').rstrip('\n')
+            lockfile = os.path.join(lockdir, tap)
+            self.lock = lockfile + '.lock'
+            self.acquire_lock()
+            self.cleantap = True
+            logger.debug('Created tap: %s' % tap)
+
+        if not tap:
+            logger.error("Failed to setup tap device. Run runqemu-gen-tapdevs to manually create.")
+            return 1
+        self.tap = tap
+        tapnum = int(tap[3:])
+        gateway = tapnum * 2 + 1
+        client = gateway + 1
+        if self.fstype == 'nfs':
+            self.setup_nfs()
+        netconf = "192.168.7.%s::192.168.7.%s:255.255.255.0" % (client, gateway)
+        logger.info("Network configuration: %s", netconf)
+        self.kernel_cmdline_script += " ip=%s" % netconf
+        mac = "%s%02x" % (self.mac_tap, client)
+        qb_tap_opt = self.get('QB_TAP_OPT')
+        if qb_tap_opt:
+            qemu_tap_opt = qb_tap_opt.replace('@TAP@', tap)
+        else:
+            qemu_tap_opt = "-netdev tap,id=net0,ifname=%s,script=no,downscript=no" % (self.tap)
+
+        if self.vhost_enabled:
+            qemu_tap_opt += ',vhost=on'
+
+        self.set('NETWORK_CMD', '%s %s' % (self.network_device.replace('@MAC@', mac), qemu_tap_opt))
+
+    def setup_network(self):
+        if self.get('QB_NET') == 'none':
+            return
+        if sys.stdin.isatty():
+            self.saved_stty = subprocess.check_output("stty -g", shell=True).decode('utf-8')
+        self.network_device = self.get('QB_NETWORK_DEVICE') or self.network_device
+        if self.slirp_enabled:
+            self.setup_slirp()
+        else:
+            self.setup_tap()
+
+    def setup_rootfs(self):
+        if self.get('QB_ROOTFS') == 'none':
+            return
+        if 'wic.' in self.fstype:
+            self.fstype = self.fstype[4:]
+        rootfs_format = self.fstype if self.fstype in ('vmdk', 'qcow2', 'vdi') else 'raw'
+
+        qb_rootfs_opt = self.get('QB_ROOTFS_OPT')
+        if qb_rootfs_opt:
+            self.rootfs_options = qb_rootfs_opt.replace('@ROOTFS@', self.rootfs)
+        else:
+            self.rootfs_options = '-drive file=%s,if=virtio,format=%s' % (self.rootfs, rootfs_format)
+
+        if self.fstype in ('cpio.gz', 'cpio'):
+            self.kernel_cmdline = 'root=/dev/ram0 rw debugshell'
+            self.rootfs_options = '-initrd %s' % self.rootfs
+        else:
+            vm_drive = ''
+            if self.fstype in self.vmtypes:
+                if self.fstype == 'iso':
+                    vm_drive = '-drive file=%s,if=virtio,media=cdrom' % self.rootfs
+                elif self.get('QB_DRIVE_TYPE'):
+                    drive_type = self.get('QB_DRIVE_TYPE')
+                    if drive_type.startswith("/dev/sd"):
+                        logger.info('Using scsi drive')
+                        vm_drive = '-drive if=none,id=hd,file=%s,format=%s -device virtio-scsi-pci,id=scsi -device scsi-hd,drive=hd' \
+                                       % (self.rootfs, rootfs_format)
+                    elif drive_type.startswith("/dev/hd"):
+                        logger.info('Using ide drive')
+                        vm_drive = "-drive file=%s,format=%s" % (self.rootfs, rootfs_format)
+                    else:
+                        # virtio might have been selected explicitly (just use it), or
+                        # is used as fallback (then warn about that).
+                        if not drive_type.startswith("/dev/vd"):
+                            logger.warn("Unknown QB_DRIVE_TYPE: %s" % drive_type)
+                            logger.warn("Failed to figure out drive type, consider define or fix QB_DRIVE_TYPE")
+                            logger.warn('Trying to use virtio block drive')
+                        vm_drive = '-drive if=virtio,file=%s,format=%s' % (self.rootfs, rootfs_format)
+
+                # All branches above set vm_drive.
+                self.rootfs_options = '%s -no-reboot' % vm_drive
+            self.kernel_cmdline = 'root=%s rw highres=off' % (self.get('QB_KERNEL_ROOT'))
+
+        if self.fstype == 'nfs':
+            self.rootfs_options = ''
+            k_root = '/dev/nfs nfsroot=%s:%s,%s' % (self.nfs_server, os.path.abspath(self.rootfs), self.unfs_opts)
+            self.kernel_cmdline = 'root=%s rw highres=off' % k_root
+
+        if self.fstype == 'none':
+            self.rootfs_options = ''
+
+        self.set('ROOTFS_OPTIONS', self.rootfs_options)
+
+    def guess_qb_system(self):
+        """attempt to determine the appropriate qemu-system binary"""
+        mach = self.get('MACHINE')
+        if not mach:
+            search = '.*(qemux86-64|qemux86|qemuarm64|qemuarm|qemumips64|qemumips64el|qemumipsel|qemumips|qemuppc).*'
+            if self.rootfs:
+                match = re.match(search, self.rootfs)
+                if match:
+                    mach = match.group(1)
+            elif self.kernel:
+                match = re.match(search, self.kernel)
+                if match:
+                    mach = match.group(1)
+
+        if not mach:
+            return None
+
+        if mach == 'qemuarm':
+            qbsys = 'arm'
+        elif mach == 'qemuarm64':
+            qbsys = 'aarch64'
+        elif mach == 'qemux86':
+            qbsys = 'i386'
+        elif mach == 'qemux86-64':
+            qbsys = 'x86_64'
+        elif mach == 'qemuppc':
+            qbsys = 'ppc'
+        elif mach == 'qemumips':
+            qbsys = 'mips'
+        elif mach == 'qemumips64':
+            qbsys = 'mips64'
+        elif mach == 'qemumipsel':
+            qbsys = 'mipsel'
+        elif mach == 'qemumips64el':
+            qbsys = 'mips64el'
+        elif mach == 'qemuriscv64':
+            qbsys = 'riscv64'
+        elif mach == 'qemuriscv32':
+            qbsys = 'riscv32'
+
+        return 'qemu-system-%s' % qbsys
+
+    def setup_final(self):
+        qemu_system = self.get('QB_SYSTEM_NAME')
+        if not qemu_system:
+            qemu_system = self.guess_qb_system()
+        if not qemu_system:
+            raise RunQemuError("Failed to boot, QB_SYSTEM_NAME is NULL!")
+
+        qemu_bin = '%s/%s' % (self.bindir_native, qemu_system)
+
+        # It is possible to have qemu-native in ASSUME_PROVIDED, and it won't
+        # find QEMU in sysroot, it needs to use host's qemu.
+        if not os.path.exists(qemu_bin):
+            logger.info("QEMU binary not found in %s, trying host's QEMU" % qemu_bin)
+            for path in (os.environ['PATH'] or '').split(':'):
+                qemu_bin_tmp = os.path.join(path, qemu_system)
+                logger.info("Trying: %s" % qemu_bin_tmp)
+                if os.path.exists(qemu_bin_tmp):
+                    qemu_bin = qemu_bin_tmp
+                    if not os.path.isabs(qemu_bin):
+                        qemu_bin = os.path.abspath(qemu_bin)
+                    logger.info("Using host's QEMU: %s" % qemu_bin)
+                    break
+
+        if not os.access(qemu_bin, os.X_OK):
+            raise OEPathError("No QEMU binary '%s' could be found" % qemu_bin)
+
+        check_libgl(qemu_bin)
+
+        self.qemu_opt = "%s %s %s %s" % (qemu_bin, self.get('NETWORK_CMD'), self.get('ROOTFS_OPTIONS'), self.get('QB_OPT_APPEND'))
+
+        for ovmf in self.ovmf_bios:
+            format = ovmf.rsplit('.', 1)[-1]
+            self.qemu_opt += ' -drive if=pflash,format=%s,file=%s' % (format, ovmf)
+        if self.ovmf_bios:
+            # OVMF only supports normal VGA, i.e. we need to override a -vga vmware
+            # that gets added for example for normal qemux86.
+            self.qemu_opt += ' -vga std'
+
+        self.qemu_opt += ' ' + self.qemu_opt_script
+
+        if self.snapshot:
+            self.qemu_opt += " -snapshot"
+
+        if self.serialstdio:
+            if sys.stdin.isatty():
+                subprocess.check_call("stty intr ^]", shell=True)
+                logger.info("Interrupt character is '^]'")
+
+            first_serial = ""
+            if not re.search("-nographic", self.qemu_opt):
+                first_serial = "-serial mon:vc"
+            # We always want a ttyS1. Since qemu by default adds a serial
+            # port when nodefaults is not specified, it seems that all that
+            # would be needed is to make sure a "-serial" is there. However,
+            # it appears that when "-serial" is specified, it ignores the
+            # default serial port that is normally added.  So here we make
+            # sure to add two -serial if there are none. And only one if
+            # there is one -serial already.
+            serial_num = len(re.findall("-serial", self.qemu_opt))
+            if serial_num == 0:
+                self.qemu_opt += " %s %s" % (first_serial, self.get("QB_SERIAL_OPT"))
+            elif serial_num == 1:
+                self.qemu_opt += " %s" % self.get("QB_SERIAL_OPT")
+
+        # We always wants ttyS0 and ttyS1 in qemu machines (see SERIAL_CONSOLES),
+        # if not serial or serialtcp options was specified only ttyS0 is created
+        # and sysvinit shows an error trying to enable ttyS1:
+        #     INIT: Id "S1" respawning too fast: disabled for 5 minutes
+        serial_num = len(re.findall("-serial", self.qemu_opt))
+        if serial_num == 0:
+            if re.search("-nographic", self.qemu_opt):
+                self.qemu_opt += " -serial mon:stdio -serial null"
+            else:
+                self.qemu_opt += " -serial mon:vc -serial null"
+
+    def start_qemu(self):
+        if self.kernel:
+            kernel_opts = "-kernel %s -append '%s %s %s %s'" % (self.kernel, self.kernel_cmdline,
+                                                                self.kernel_cmdline_script, self.get('QB_KERNEL_CMDLINE_APPEND'),
+                                                                self.bootparams)
+            if self.dtb:
+                kernel_opts += " -dtb %s" % self.dtb
+        else:
+            kernel_opts = ""
+        cmd = "%s %s" % (self.qemu_opt, kernel_opts)
+        logger.info('Running %s\n' % cmd)
+        process = subprocess.Popen(cmd, shell=True, stderr=subprocess.PIPE)
+        if process.wait():
+            logger.error("Failed to run qemu: %s", process.stderr.read().decode())
+
+    def cleanup(self):
+        if self.cleantap:
+            cmd = 'sudo %s %s %s' % (self.qemuifdown, self.tap, self.bindir_native)
+            logger.debug('Running %s' % cmd)
+            subprocess.check_call(cmd, shell=True)
+        if self.lock_descriptor:
+            logger.info("Releasing lockfile for tap device '%s'" % self.tap)
+            self.release_lock()
+
+        if self.nfs_running:
+            logger.info("Shutting down the userspace NFS server...")
+            cmd = "runqemu-export-rootfs stop %s" % self.rootfs
+            logger.debug('Running %s' % cmd)
+            subprocess.check_call(cmd, shell=True)
+
+        if self.saved_stty:
+            cmd = "stty %s" % self.saved_stty
+            subprocess.check_call(cmd, shell=True)
+
+        if self.clean_nfs_dir:
+            logger.info('Removing %s' % self.rootfs)
+            shutil.rmtree(self.rootfs)
+            shutil.rmtree('%s.pseudo_state' % self.rootfs)
+
+    def load_bitbake_env(self, mach=None):
+        if self.bitbake_e:
+            return
+
+        bitbake = shutil.which('bitbake')
+        if not bitbake:
+            return
+
+        if not mach:
+            mach = self.get('MACHINE')
+
+        if mach:
+            cmd = 'MACHINE=%s bitbake -e' % mach
+        else:
+            cmd = 'bitbake -e'
+
+        logger.info('Running %s...' % cmd)
+        try:
+            self.bitbake_e = subprocess.check_output(cmd, shell=True).decode('utf-8')
+        except subprocess.CalledProcessError as err:
+            self.bitbake_e = ''
+            logger.warn("Couldn't run 'bitbake -e' to gather environment information:\n%s" % err.output.decode('utf-8'))
+
+    def validate_combos(self):
+        if (self.fstype in self.vmtypes) and self.kernel:
+            raise RunQemuError("%s doesn't need kernel %s!" % (self.fstype, self.kernel))
+
+    @property
+    def bindir_native(self):
+        result = self.get('STAGING_BINDIR_NATIVE')
+        if result and os.path.exists(result):
+            return result
+
+        cmd = 'bitbake qemu-helper-native -e'
+        logger.info('Running %s...' % cmd)
+        out = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE)
+        out = out.stdout.read().decode('utf-8')
+
+        match = re.search('^STAGING_BINDIR_NATIVE="(.*)"', out, re.M)
+        if match:
+            result = match.group(1)
+            if os.path.exists(result):
+                self.set('STAGING_BINDIR_NATIVE', result)
+                return result
+            raise RunQemuError("Native sysroot directory %s doesn't exist" % result)
+        else:
+            raise RunQemuError("Can't find STAGING_BINDIR_NATIVE in '%s' output" % cmd)
+
+
+def main():
+    if "help" in sys.argv or '-h' in sys.argv or '--help' in sys.argv:
+        print_usage()
+        return 0
+    try:
+        config = BaseConfig()
+        config.check_args()
+        config.read_qemuboot()
+        config.check_and_set()
+        # Check whether the combos is valid or not
+        config.validate_combos()
+        config.print_config()
+        config.setup_network()
+        config.setup_rootfs()
+        config.setup_final()
+        config.start_qemu()
+    except RunQemuError as err:
+        logger.error(err)
+        return 1
+    except Exception as err:
+        import traceback
+        traceback.print_exc()
+        return 1
+    finally:
+        print("Cleanup")
+        config.cleanup()
+
+if __name__ == "__main__":
+    sys.exit(main())