From a35d03e2eb905de4eadc9c7df5b50bff1fb7f897 Mon Sep 17 00:00:00 2001 From: Cristian Iorga Date: Wed, 19 Sep 2012 10:06:54 +0300 Subject: qemux86: Support for KVM, paravirt and virtio added KVM, paravirtualization and virtio drivers are now activated in runqemu using the kvm option flag for qemux86. Host CPU features are also exported to guest OS (Yocto Linux). Usage example: runqemu qemux86 core-image-x11 kvm Implements [YOCTO #2550]. Signed-off-by: Cristian Iorga Signed-off-by: Saul Wold --- meta/recipes-kernel/linux/linux-yocto_3.4.bb | 1 + scripts/runqemu | 16 +++++++++++++++- scripts/runqemu-internal | 14 +++++++++++--- 3 files changed, 27 insertions(+), 4 deletions(-) diff --git a/meta/recipes-kernel/linux/linux-yocto_3.4.bb b/meta/recipes-kernel/linux/linux-yocto_3.4.bb index 7c082e75ad..32ae02b512 100644 --- a/meta/recipes-kernel/linux/linux-yocto_3.4.bb +++ b/meta/recipes-kernel/linux/linux-yocto_3.4.bb @@ -27,4 +27,5 @@ KERNEL_REVISION_CHECKING="" KERNEL_FEATURES_append = " features/netfilter" KERNEL_FEATURES_append_qemux86=" cfg/sound" KERNEL_FEATURES_append_qemux86-64=" cfg/sound" +KERNEL_FEATURES_append_qemux86=" cfg/paravirt_kvm" KERNEL_FEATURES_append = " ${@bb.utils.contains("TUNE_FEATURES", "mx32", " cfg/x32", "" ,d)}" diff --git a/scripts/runqemu b/scripts/runqemu index a9f513c7a9..e6e43f20c8 100755 --- a/scripts/runqemu +++ b/scripts/runqemu @@ -208,6 +208,7 @@ if [ -z "$MACHINE" ]; then 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 @@ -226,14 +227,27 @@ if [ "x$KVM_ENABLED" = "xyes" ]; then echo "$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 "$YOCTO_PARAVIRT_KVM_WIKI"; + exit 1; + fi if 9<>/dev/kvm ; then - SCRIPT_QEMU_OPT="$SCRIPT_QEMU_OPT -enable-kvm" + 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 -a -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 $MACHINE | tr 'a-z' 'A-Z' | sed 's/-/_/'` diff --git a/scripts/runqemu-internal b/scripts/runqemu-internal index a9b1c44de4..f2c8d8309f 100755 --- a/scripts/runqemu-internal +++ b/scripts/runqemu-internal @@ -221,7 +221,15 @@ n2=$(($n1 + 1)) KERNEL_NETWORK_CMD="ip=192.168.7.$n2::192.168.7.$n1:255.255.255.0" QEMU_TAP_CMD="-net tap,vlan=0,ifname=$TAP,script=no,downscript=no" -QEMU_NETWORK_CMD="-net nic,vlan=0 $QEMU_TAP_CMD" +if [ "$KVM_ACTIVE" = "yes" ]; then + QEMU_NETWORK_CMD="-net nic,model=virtio $QEMU_TAP_CMD,vhost=on" + DROOT="/dev/vda" + ROOTFS_OPTIONS="-drive file=$ROOTFS,if=virtio" +else + QEMU_NETWORK_CMD="-net nic,vlan=0 $QEMU_TAP_CMD" + DROOT="/dev/hda" + ROOTFS_OPTIONS="-hda $ROOTFS" +fi KERNCMDLINE="mem=$QEMU_MEMORY" QEMU_UI_OPTIONS="-show-cursor -usb -usbdevice wacom-tablet" @@ -321,8 +329,8 @@ if [ "$MACHINE" = "qemux86" ]; then QEMU=qemu-system-i386 QEMU_UI_OPTIONS="$QEMU_UI_OPTIONS -vga vmware" if [ "$FSTYPE" = "ext2" -o "$FSTYPE" = "ext3" -o "$FSTYPE" = "btrfs" ]; then - KERNCMDLINE="vga=0 root=/dev/hda rw mem=$QEMU_MEMORY $KERNEL_NETWORK_CMD" - QEMUOPTIONS="$QEMU_NETWORK_CMD -hda $ROOTFS $QEMU_UI_OPTIONS" + KERNCMDLINE="vga=0 root=$DROOT rw mem=$QEMU_MEMORY $KERNEL_NETWORK_CMD" + QEMUOPTIONS="$QEMU_NETWORK_CMD $ROOTFS_OPTIONS $QEMU_UI_OPTIONS" fi if [ "$FSTYPE" = "nfs" ]; then if [ "$NFS_SERVER" = "192.168.7.1" -a ! -d "$NFS_DIR" ]; then -- cgit 1.2.3-korg