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# Help runqemu boot target board, "QB" means Qemu Boot, the following
# vars can be set in conf files, such as <bsp.conf> to make it can be
# boot by runqemu:
#
# QB_SYSTEM_NAME: qemu name, e.g., "qemu-system-i386"
#
# QB_OPT_APPEND: options to append to qemu, e.g., "-device usb-mouse"
#
# QB_DEFAULT_KERNEL: default kernel to boot, e.g., "bzImage"
#
# QB_DEFAULT_FSTYPE: default FSTYPE to boot, e.g., "ext4"
#
# QB_MEM: memory, e.g., "-m 512"
#
# QB_MACHINE: qemu machine, e.g., "-machine virt"
#
# QB_CPU: qemu cpu, e.g., "-cpu qemu32"
#
# QB_CPU_KVM: the similar to QB_CPU, but used when kvm, e.g., '-cpu kvm64',
# set it when support kvm.
#
# QB_SMP: amount of CPU cores inside qemu guest, each mapped to a thread on the host,
# e.g. "-smp 8".
#
# QB_KERNEL_CMDLINE_APPEND: options to append to kernel's -append
# option, e.g., "console=ttyS0 console=tty"
#
# QB_DTB: qemu dtb name
#
# QB_AUDIO_DRV: qemu audio driver, e.g., "alsa", set it when support audio
#
# QB_AUDIO_OPT: qemu audio option, e.g., "-soundhw ac97,es1370", used
# when QB_AUDIO_DRV is set.
#
# QB_RNG: Pass-through for host random number generator, it can speedup boot
# in system mode, where system is experiencing entropy starvation
#
# QB_KERNEL_ROOT: kernel's root, e.g., /dev/vda
#
# QB_NETWORK_DEVICE: network device, e.g., "-device virtio-net-pci,netdev=net0,mac=@MAC@",
# it needs work with QB_TAP_OPT and QB_SLIRP_OPT.
# Note, runqemu will replace @MAC@ with a predefined mac, you can set
# a custom one, but that may cause conflicts when multiple qemus are
# running on the same host.
# Note: If more than one interface of type -device virtio-net-device gets added,
# QB_NETWORK_DEVICE_prepend might be used, since Qemu enumerates the eth*
# devices in reverse order to -device arguments.
#
# QB_TAP_OPT: network option for 'tap' mode, e.g.,
# "-netdev tap,id=net0,ifname=@TAP@,script=no,downscript=no"
# Note, runqemu will replace "@TAP@" with the one which is used, such as tap0, tap1 ...
#
# QB_SLIRP_OPT: network option for SLIRP mode, e.g., -netdev user,id=net0"
#
# QB_CMDLINE_IP_SLIRP: If QB_NETWORK_DEVICE adds more than one network interface to qemu, usually the
# ip= kernel comand line argument needs to be changed accordingly. Details are documented
# in the kernel docuemntation https://www.kernel.org/doc/Documentation/filesystems/nfs/nfsroot.txt
# Example to configure only the first interface: "ip=eth0:dhcp"
# QB_CMDLINE_IP_TAP: This parameter is similar to the QB_CMDLINE_IP_SLIRP parameter. Since the tap interface requires
# static IP configuration @CLIENT@ and @GATEWAY@ place holders are replaced by the IP and the gateway
# address of the qemu guest by runqemu.
# Example: "ip=192.168.7.@CLIENT@::192.168.7.@GATEWAY@:255.255.255.0::eth0"
#
# QB_ROOTFS_OPT: used as rootfs, e.g.,
# "-drive id=disk0,file=@ROOTFS@,if=none,format=raw -device virtio-blk-device,drive=disk0"
# Note, runqemu will replace "@ROOTFS@" with the one which is used, such as core-image-minimal-qemuarm64.ext4.
#
# QB_SERIAL_OPT: serial port, e.g., "-serial mon:stdio"
#
# QB_TCPSERIAL_OPT: tcp serial port option, e.g.,
# " -device virtio-serial-device -chardev socket,id=virtcon,port=@PORT@,host=127.0.0.1 -device virtconsole,chardev=virtcon"
# Note, runqemu will replace "@PORT@" with the port number which is used.
#
# QB_ROOTFS_EXTRA_OPT: extra options to be appended to the rootfs device in case there is none specified by QB_ROOTFS_OPT.
# Can be used to automatically determine the image from the other variables
# but define things link 'bootindex' when booting from EFI or 'readonly' when using squashfs
# without the need to specify a dedicated qemu configuration
#
# QB_GRAPHICS: QEMU video card type (e.g. "-vga std")
#
# Usage:
# IMAGE_CLASSES += "qemuboot"
# See "runqemu help" for more info
QB_MEM ?= "-m 256"
QB_SMP ?= ""
QB_SERIAL_OPT ?= "-serial mon:stdio -serial null"
QB_DEFAULT_KERNEL ?= "${KERNEL_IMAGETYPE}"
QB_DEFAULT_FSTYPE ?= "ext4"
QB_RNG ?= "-object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-pci,rng=rng0"
QB_OPT_APPEND ?= ""
QB_NETWORK_DEVICE ?= "-device virtio-net-pci,netdev=net0,mac=@MAC@"
QB_CMDLINE_IP_SLIRP ?= "ip=dhcp"
QB_CMDLINE_IP_TAP ?= "ip=192.168.7.@CLIENT@::192.168.7.@GATEWAY@:255.255.255.0"
QB_ROOTFS_EXTRA_OPT ?= ""
QB_GRAPHICS ?= ""
# This should be kept align with ROOT_VM
QB_DRIVE_TYPE ?= "/dev/sd"
inherit image-artifact-names
# Create qemuboot.conf
addtask do_write_qemuboot_conf after do_rootfs before do_image
def qemuboot_vars(d):
build_vars = ['MACHINE', 'TUNE_ARCH', 'DEPLOY_DIR_IMAGE',
'KERNEL_IMAGETYPE', 'IMAGE_NAME', 'IMAGE_LINK_NAME',
'STAGING_DIR_NATIVE', 'STAGING_BINDIR_NATIVE',
'STAGING_DIR_HOST', 'SERIAL_CONSOLES']
return build_vars + [k for k in d.keys() if k.startswith('QB_')]
do_write_qemuboot_conf[vardeps] += "${@' '.join(qemuboot_vars(d))}"
do_write_qemuboot_conf[vardepsexclude] += "TOPDIR"
python do_write_qemuboot_conf() {
import configparser
qemuboot = "%s/%s.qemuboot.conf" % (d.getVar('IMGDEPLOYDIR'), d.getVar('IMAGE_NAME'))
qemuboot_link = "%s/%s.qemuboot.conf" % (d.getVar('IMGDEPLOYDIR'), d.getVar('IMAGE_LINK_NAME'))
finalpath = d.getVar("DEPLOY_DIR_IMAGE")
topdir = d.getVar('TOPDIR')
cf = configparser.ConfigParser()
cf.add_section('config_bsp')
for k in sorted(qemuboot_vars(d)):
# qemu-helper-native sysroot is not removed by rm_work and
# contains all tools required by runqemu
if k == 'STAGING_BINDIR_NATIVE':
val = os.path.join(d.getVar('BASE_WORKDIR'), d.getVar('BUILD_SYS'),
'qemu-helper-native/1.0-r1/recipe-sysroot-native/usr/bin/')
else:
val = d.getVar(k)
# we only want to write out relative paths so that we can relocate images
# and still run them
if val.startswith(topdir):
val = os.path.relpath(val, finalpath)
cf.set('config_bsp', k, '%s' % val)
# QB_DEFAULT_KERNEL's value of KERNEL_IMAGETYPE is the name of a symlink
# to the kernel file, which hinders relocatability of the qb conf.
# Read the link and replace it with the full filename of the target.
kernel_link = os.path.join(d.getVar('DEPLOY_DIR_IMAGE'), d.getVar('QB_DEFAULT_KERNEL'))
kernel = os.path.realpath(kernel_link)
# we only want to write out relative paths so that we can relocate images
# and still run them
kernel = os.path.relpath(kernel, finalpath)
cf.set('config_bsp', 'QB_DEFAULT_KERNEL', kernel)
bb.utils.mkdirhier(os.path.dirname(qemuboot))
with open(qemuboot, 'w') as f:
cf.write(f)
if qemuboot_link != qemuboot:
if os.path.lexists(qemuboot_link):
os.remove(qemuboot_link)
os.symlink(os.path.basename(qemuboot), qemuboot_link)
}
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