Hi,

I try to compile me a new qemu image on the todays bleeding edge branch (barrier braker). I've been running openwrt on qemu as my central router at home for months now. It's a lot of fun because it's so blazingly fast even compared e.g. to a WNDR3700v2.

Though I'm stuck because when I boot it it won't get further than this
Waiting for root device /dev/sda2...

I already tried some different kernel modules like scsi-core or ata but none worked so far.

My libvirt configuration:
http://pastebin.com/TznTTxnA

My compile config:
http://pastebin.com/9cqi3GVf

I have this attitude adjustment qemu image running with the exact same libvirt configuration (but of course with network interfaces). Working like a charm.
OpenWrt Attitude Adjustment 12.09.1 / LuCI 0.11 Branch (0.11+svn9951)

Doesn't anybody have  barrier breaker running via qemu?

I have x86 and x86-64 target images running succesful on trunk with Qemu on Arch Linux (qemu 2.0)

I usually start with command line.

The wiki pages for Qemu were recently redesigned and updated.
have a read at : http://wiki.openwrt.org/doc/howto/qemu

notice the x86-64 "machine" issue with Qemu there
the commandline there is working on my end - test it on your side

Instead of providing the config it is better to supply just the output of

./scripts/diffconfig.sh

That long config file is not really helpful for quickly seeing what stuff you selected that is different from default.

Somebody needs to add import/export XML profile libvirt stuff to wiki(for quick + dirty command line normally is fine and not overkill like xml)

I seem to be using qemu 1.0 at ubuntu 12.04.

You are right I'm sorry. Here's the diff:

Regarding the x86_64 issue: I'm not using vdi images. Should I be using it? I will try now.

I tried .vdi image with the command given at the wiki qemu page of openwrt you linked, but my qemu version doesn't support pc-q35-2.0 so I didn't use the "-M" switch. I also did not give any network interfaces.

Anyhow I run into the exact same problem:
Waiting for root device /dev/sda2...

I also tried the vdi image with virtualbox (mac) 4.3.8 and this it working fine.

Update:
I updated to Ubuntu 14.04 with Qemu 2.0.0. The problem persists.
Update 2:
I forgot to run the qemu command line with emulation type pc-q35-2.0. It's working now.

Could we conclude that qemu 1.0.0 won't work with Barrier Breaker trunk since it does not support pc-q35-2.0?

(Last edited by juni on 13 Jul 2014, 13:44)

Well, it works with qemu 2 to the point where it hangs at hardware / disk detection - it boots grub, so it works to a certain degree (no coredump / Oops)

afaik there was a ticket asking for IDE drivers that are used in older Qemu machines to be activated but that ticket was denied + closed

check sth like

CONFIG_TARGET_x86_64=y
CONFIG_TARGET_x86_64_Default=y
CONFIG_TARGET_BOARD="x86_64"
CONFIG_DEVEL=y
CONFIG_BUILD_LOG=y
CONFIG_PACKAGE_kmod-ata-ahci=y
CONFIG_PACKAGE_kmod-ata-core=y
CONFIG_PACKAGE_kmod-ata-marvell-sata=y
CONFIG_PACKAGE_kmod-ata-nvidia-sata=y
CONFIG_PACKAGE_kmod-ata-piix=y
CONFIG_PACKAGE_kmod-ata-sil=y
CONFIG_PACKAGE_kmod-crypto-core=y
CONFIG_PACKAGE_kmod-crypto-hash=y
CONFIG_PACKAGE_kmod-fs-ext4=y
CONFIG_PACKAGE_kmod-ide-core=y
CONFIG_PACKAGE_kmod-ide-generic=y
CONFIG_PACKAGE_kmod-ide-generic-old=y
CONFIG_PACKAGE_kmod-lib-crc16=y
CONFIG_PACKAGE_kmod-scsi-core=y
CONFIG_PACKAGE_kmod-scsi-generic=y
# CONFIG_TARGET_IMAGES_GZIP is not set
CONFIG_TARGET_INITRAMFS_COMPRESSION_NONE=y
CONFIG_TARGET_KERNEL_PARTSIZE=48
CONFIG_TARGET_OPTIONS=y
CONFIG_TARGET_ROOTFS_INCLUDE_KERNEL=y
CONFIG_TARGET_ROOTFS_INITRAMFS=y
CONFIG_TARGET_ROOTFS_PARTSIZE=512
# CONFIG_TARGET_ROOTFS_TARGZ is not set
CONFIG_VDI_IMAGES=y
CONFIG_VMDK_IMAGES=y

at my end this boots again with the old

qemu-system-x86_64 -hda openwrt-x86_64-combined-ext4.vdi

commandline

edit: notice according to http://wiki.qemu.org/Features/Q35 the new machine has better features like easier pcie passthrough

(Last edited by zloop on 15 Jul 2014, 08:11)

Using pc-1.0, qemu 2.0 and your kernel compile config, I'm again stuck at waiting for /dev/sda2

No matter what I do, I am not able to run openwrt barrier breaker via qemu.
Could someone please lead me into the right direction.

I'm using ubuntu 14.04 with
qemu 2.0
libvirt 1.2.8

I would like to have an xml configuration file as in /etc/libvirt/qemu so that it's easy to handle the virtual machine.
The wiki page (http://wiki.openwrt.org/doc/howto/qemu) does not really help.
It's using a vdi image which I do not intend to. Plus there is no xml configuration given.

Here I read that libvirt can handle q35 only with version 1.3+ (http://fedoraproject.org/wiki/Features/ … xpress_Q35).
Is it really necessary for me to use q35 in order to be able to use openwrt kvm guest?

(Last edited by juni on 5 Oct 2014, 09:22)

What's the status here? I really would like to run openwrt CC trunk in qemu with libvirt.