poky/scripts/runqemu

#!/bin/bash

Handle running OE images standalone with QEMU

Copyright (C) 2006-2011 Linux Foundation

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.

usage() { MYNAME=basename $0 echo "" echo "Usage: you can run this script with any valid combination" echo "of the following options (in any order):" echo " QEMUARCH - the qemu machine architecture to use" echo " KERNEL - the kernel image file to use" echo " ROOTFS - the rootfs image file or nfsroot directory to use" echo " MACHINE - the machine name (optional, autodetected from KERNEL filename if unspecified)" echo " RAMFS - boot a ramfs-based image" echo " Simplified QEMU command-line options can be passed with:" echo " nographic - disables video console" echo " serial - enables a serial console on /dev/ttyS0" echo " kvm - enables KVM when running qemux86/qemux86-64 (VT-capable CPU required)" echo " qemuparams="xyz" - specify custom parameters to QEMU" echo " bootparams="xyz" - specify custom kernel parameters during boot" echo "" echo "Examples:" echo " $MYNAME qemuarm" echo " $MYNAME qemux86-64 core-image-sato ext3" echo " $MYNAME path/to/bzImage-qemux86.bin path/to/nfsrootdir/ serial" echo " $MYNAME qemux86 ramfs" echo " $MYNAME qemux86 qemuparams="-m 256"" echo " $MYNAME qemux86 bootparams="psplash=false"" exit 1 }

if [ "x$1" = "x" ]; then usage fi

error() { echo "Error: "$* usage }

MACHINE=${MACHINE:=""} KERNEL=${KERNEL:=""} ROOTFS=${ROOTFS:=""} FSTYPE="" LAZY_ROOTFS="" SCRIPT_QEMU_OPT="" SCRIPT_QEMU_EXTRA_OPT="" SCRIPT_KERNEL_OPT=""

Determine whether the file is a kernel or QEMU image, and set the

appropriate variables

process_filename() { filename=$1

# Extract the filename extension
EXT=`echo $filename | awk -F . '{ print \$NF }'`
case /$EXT/ in
/bin/)
	# A file ending in .bin is a kernel
	[ -z "$KERNEL" ] && KERNEL=$filename || \
	    error "conflicting KERNEL args [$KERNEL] and [$filename]"
	;;
/ext[234]/|/jffs2/|/btrfs/)
	# A file ending in a supportted fs type is a rootfs image
	if [ -z "$FSTYPE" -o "$FSTYPE" = "$EXT" ]; then
	    FSTYPE=$EXT
	    ROOTFS=$filename
	else
	    error "conflicting FSTYPE types [$FSTYPE] and [$EXT]"
	fi
	;;
*)
	error "unknown file arg [$filename]"
	;;
esac

}

Parse command line args without requiring specific ordering. It's a

bit more complex, but offers a great user experience.

KVM_ENABLED="no" while true; do arg=${1} case "$arg" in "qemux86" | "qemux86-64" | "qemuarm" | "qemumips" | "qemumipsel" | "qemumips64" | "qemush4" | "qemuppc") [ -z "$MACHINE" ] && MACHINE=$arg ||
error "conflicting MACHINE types [$MACHINE] and [$arg]" ;; "ext2" | "ext3" | "ext4" | "jffs2" | "nfs" | "btrfs") [ -z "$FSTYPE" -o "$FSTYPE" = "$arg" ] && FSTYPE=$arg ||
error "conflicting FSTYPE types [$FSTYPE] and [$arg]" ;; -image) [ -z "$ROOTFS" ] ||
error "conflicting ROOTFS args [$ROOTFS] and [$arg]" if [ -f "$arg" ]; then process_filename $arg elif [ -d "$arg" ]; then # Handle the case where the nfsroot dir has -image- # in the pathname echo "Assuming $arg is an nfs rootfs" FSTYPE=nfs ROOTFS=$arg else ROOTFS=$arg LAZY_ROOTFS="true" fi ;; "ramfs") FSTYPE=cpio.gz RAMFS=true ;; "nographic") SCRIPT_QEMU_OPT="$SCRIPT_QEMU_OPT -nographic" SCRIPT_KERNEL_OPT="$SCRIPT_KERNEL_OPT console=ttyS0" ;; "serial") SCRIPT_QEMU_OPT="$SCRIPT_QEMU_OPT -serial stdio" SCRIPT_KERNEL_OPT="$SCRIPT_KERNEL_OPT console=ttyS0" ;; "qemuparams="*) SCRIPT_QEMU_EXTRA_OPT="${arg##qemuparams=}"

        # Warn user if they try to specify serial or kvm options
        # to use simplified options instead
        serial_option=`expr "$SCRIPT_QEMU_EXTRA_OPT" : '.*\(-serial\)'`
        kvm_option=`expr "$SCRIPT_QEMU_EXTRA_OPT" : '.*\(-enable-kvm\)'`
        [ ! -z "$serial_option" -o ! -z "$kvm_option" ] && \
            error "Please use simplified serial or kvm options instead"
        ;;
    "bootparams="*)
        SCRIPT_KERNEL_OPT="$SCRIPT_KERNEL_OPT ${arg##bootparams=}"
        ;;
    "audio")
        if [ "x$MACHINE" = "xqemux86" -o "x$MACHINE" = "xqemux86-64" ]; then
            echo "Enabling audio in qemu."
            echo "Please install snd_intel8x0 or snd_ens1370 driver in linux guest."
            QEMU_AUDIO_DRV="alsa"
            SCRIPT_QEMU_OPT="$SCRIPT_QEMU_OPT -soundhw ac97,es1370"
        fi
        ;;
    "kvm")
        KVM_ENABLED="yes"
        KVM_CAPABLE=`grep -q 'vmx\|svm' /proc/cpuinfo && echo 1`
        ;;
    "") break ;;
    *)
        # A directory name is an nfs rootfs
        if [ -d "$arg" ]; then
            echo "Assuming $arg is an nfs rootfs"
            if [ -z "$FSTYPE" -o "$FSTYPE" = "nfs" ]; then
                FSTYPE=nfs
            else
                error "conflicting FSTYPE types [$arg] and nfs"
            fi

            if [ -z "$ROOTFS" ]; then
                ROOTFS=$arg
            else
                error "conflicting ROOTFS args [$ROOTFS] and [$arg]"
            fi
        elif [ -f "$arg" ]; then
            process_filename $arg
        else
            error "unable to classify arg [$arg]"
        fi
        ;;
esac
shift

done

if [ ! -c /dev/net/tun ] ; then echo "TUN control device /dev/net/tun is unavailable; you may need to enable TUN (e.g. sudo modprobe tun)" exit 1 elif [ ! -w /dev/net/tun ] ; then echo "TUN control device /dev/net/tun is not writable, please fix (e.g. sudo chmod 666 /dev/net/tun)" exit 1 fi

Report errors for missing combinations of options

if [ -z "$MACHINE" -a -z "$KERNEL" ]; then error "you must specify at least a MACHINE or KERNEL argument" fi if [ "$FSTYPE" = "nfs" -a -z "$ROOTFS" ]; then error "NFS booting without an explicit ROOTFS path is not yet supported" fi

if [ -z "$MACHINE" ]; then MACHINE=basename $KERNEL | sed 's/.*\(qemux86-64\|qemux86\|qemuarm\|qemumips64\|qemumips\|qemuppc\|qemush4\).*/\1/' if [ -z "$MACHINE" ]; then error "Unable to set MACHINE from kernel filename [$KERNEL]" fi echo "Set MACHINE to [$MACHINE] based on kernel [$KERNEL]" fi

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"

Detect KVM configuration

if [ "x$KVM_ENABLED" = "xyes" ]; then if [ -z "$KVM_CAPABLE" ]; then echo "You are trying to enable KVM on a cpu without VT support." echo "Remove kvm from the command-line, or refer" echo "$YOCTO_KVM_WIKI"; exit 1; fi if [ "x$MACHINE" != "xqemux86" -a "x$MACHINE" != "xqemux86-64" ]; then echo "KVM only support x86 & x86-64. Remove kvm from the command-line"; exit 1; fi if [ ! -e /dev/kvm ]; then echo "Missing KVM device. Have you inserted kvm modules?" echo "For further help see:" echo "$YOCTO_KVM_WIKI"; exit 1; fi if [ ! -e /dev/vhost-net ]; then echo "Missing virtio net device. Have you inserted vhost-net module?" echo "For further help see:" echo "$YOCTO_PARAVIRT_KVM_WIKI"; exit 1; fi if [ -w /dev/kvm -a -r /dev/kvm ]; then SCRIPT_QEMU_OPT="$SCRIPT_QEMU_OPT -enable-kvm -cpu host" KVM_ACTIVE="yes" else echo "You have no rights on /dev/kvm." echo "Please change the ownership of this file as described at:" echo "$YOCTO_KVM_WIKI"; exit 1; fi if [ ! -w /dev/vhost-net -o ! -r /dev/vhost-net ]; then echo "You have no rights on /dev/vhost-net." echo "Please change the ownership of this file as described at:" echo "$YOCTO_PARAVIRT_KVM_WIKI"; exit 1; fi fi

machine2=echo $MACHINE | tr 'a-z' 'A-Z' | sed 's/-/_/'

MACHINE is now set for all cases

Defaults used when these vars need to be inferred

QEMUX86_DEFAULT_KERNEL=bzImage-qemux86.bin QEMUX86_DEFAULT_FSTYPE=ext3

QEMUX86_64_DEFAULT_KERNEL=bzImage-qemux86-64.bin QEMUX86_64_DEFAULT_FSTYPE=ext3

QEMUARM_DEFAULT_KERNEL=zImage-qemuarm.bin QEMUARM_DEFAULT_FSTYPE=ext3

QEMUMIPS_DEFAULT_KERNEL=vmlinux-qemumips.bin QEMUMIPS_DEFAULT_FSTYPE=ext3

QEMUMIPSEL_DEFAULT_KERNEL=vmlinux-qemumipsel.bin QEMUMIPSEL_DEFAULT_FSTYPE=ext3

QEMUMIPS64_DEFAULT_KERNEL=vmlinux-qemumips64.bin QEMUMIPS64_DEFAULT_FSTYPE=ext3

QEMUSH4_DEFAULT_KERNEL=vmlinux-qemumips.bin QEMUSH4_DEFAULT_FSTYPE=ext3

QEMUPPC_DEFAULT_KERNEL=vmlinux-qemuppc.bin QEMUPPC_DEFAULT_FSTYPE=ext3

AKITA_DEFAULT_KERNEL=zImage-akita.bin AKITA_DEFAULT_FSTYPE=jffs2

SPITZ_DEFAULT_KERNEL=zImage-spitz.bin SPITZ_DEFAULT_FSTYPE=ext3

setup_tmpdir() { if [ -z "$OE_TMPDIR" ]; then # Try to get OE_TMPDIR from bitbake type -P bitbake &>/dev/null || { echo "In order for this script to dynamically infer paths"; echo "to kernels or filesystem images, you either need"; echo "bitbake in your PATH or to source oe-init-build-env"; echo "before running this script" >&2; exit 1; }

    # We have bitbake in PATH, get OE_TMPDIR from bitbake
    OE_TMPDIR=`MACHINE=$MACHINE bitbake -e | grep ^TMPDIR=\" | cut -d '=' -f2 | cut -d '"' -f2`
    if [ -z "$OE_TMPDIR" ]; then
        # Check for errors from bitbake that the user needs to know about
        BITBAKE_OUTPUT=`bitbake -e | wc -l`
        if [ "$BITBAKE_OUTPUT" -eq "0" ]; then
            echo "Error: this script needs to be run from your build directory,"
            echo "or you need to explicitly set OE_TMPDIR in your environment"
        else
            echo "There was an error running bitbake to determine TMPDIR"
            echo "Here is the output from 'bitbake -e':"
            bitbake -e
        fi
        exit 1
    fi
fi

}

setup_sysroot() { # Toolchain installs set up $OECORE_NATIVE_SYSROOT in their # environment script. If that variable isn't set, we're # either in an in-tree build scenario or the environment # script wasn't source'd. if [ -z "$OECORE_NATIVE_SYSROOT" ]; then setup_tmpdir BUILD_ARCH=uname -m BUILD_OS=uname | tr '[A-Z]' '[a-z]' BUILD_SYS="$BUILD_ARCH-$BUILD_OS"

    OECORE_NATIVE_SYSROOT=$OE_TMPDIR/sysroots/$BUILD_SYS
fi 

}

Locate a rootfs image to boot which matches our expected

machine and fstype.

findimage() { where=$1 machine=$2 extension=$3

# Sort rootfs candidates by modification time - the most
# recently created one is the one we most likely want to boot.
filenames=`ls -t $where/*-image*$machine.$extension 2>/dev/null | xargs`
for name in $filenames; do
    case $name in
    *core-image-sato* | \
    *core-image-lsb* | \
    *core-image-basic* | \
    *core-image-minimal* )
        ROOTFS=$name
        return
        ;;
    esac
done

echo "Couldn't find a $machine rootfs image in $where."
exit 1

}

if [ -e "$ROOTFS" -a -z "$FSTYPE" ]; then # Extract the filename extension EXT=echo $ROOTFS | awk -F . '{ print \$NF }' if [ "x$EXT" = "xext2" -o "x$EXT" = "xext3" -o
"x$EXT" = "xjffs2" -o "x$EXT" = "xbtrfs" ]; then FSTYPE=$EXT else echo "Note: Unable to determine filesystem extension for $ROOTFS" echo "We will use the default FSTYPE for $MACHINE" # ...which is done further below... fi fi

if [ -z "$KERNEL" ]; then setup_tmpdir eval kernel_file=$${machine2}_DEFAULT_KERNEL KERNEL=$OE_TMPDIR/deploy/images/$kernel_file

if [ -z "$KERNEL" ]; then
    error "Unable to determine default kernel for MACHINE [$MACHINE]"
fi

fi

KERNEL is now set for all cases

if [ -z "$FSTYPE" ]; then eval FSTYPE=$${machine2}_DEFAULT_FSTYPE

if [ -z "$FSTYPE" ]; then
    error "Unable to determine default fstype for MACHINE [$MACHINE]"
fi

fi

FSTYPE is now set for all cases

Handle cases where a ROOTFS type is given instead of a filename, e.g.

core-image-sato

if [ "$LAZY_ROOTFS" = "true" ]; then setup_tmpdir echo "Assuming $ROOTFS really means $OE_TMPDIR/deploy/images/$ROOTFS-$MACHINE.$FSTYPE" ROOTFS=$OE_TMPDIR/deploy/images/$ROOTFS-$MACHINE.$FSTYPE fi

if [ -z "$ROOTFS" ]; then setup_tmpdir T=$OE_TMPDIR/deploy/images eval rootfs_list=$${machine2}_DEFAULT_ROOTFS findimage $T $MACHINE $FSTYPE

if [ -z "$ROOTFS" ]; then
    error "Unable to determine default rootfs for MACHINE [$MACHINE]"
fi

fi

ROOTFS is now set for all cases

echo "" echo "Continuing with the following parameters:" echo "KERNEL: [$KERNEL]" echo "ROOTFS: [$ROOTFS]" echo "FSTYPE: [$FSTYPE]"

setup_sysroot

OECORE_NATIVE_SYSROOT is now set for all cases

INTERNAL_SCRIPT="$0-internal" if [ ! -f "$INTERNAL_SCRIPT" -o ! -r "$INTERNAL_SCRIPT" ]; then INTERNAL_SCRIPT=which runqemu-internal fi

. $INTERNAL_SCRIPT exit $?