QEMU (short for "Quick EMUlator") is a free and open-source hosted hypervisor that performs hardware virtualization.

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TightVNC shows the window cropped

I am running debian live cd in qemu (kvm), and when I connect to VNC via vncviewer localhost:5900 the window is cropped to some static width and height combination. Making window fullscreen or ...
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204 views

Backtrace of “git clone” running inside qemu-user-emulation based arm-chroot

I'm running a wheezy:armhf chroot using qemu user emulation on my jessie:x86_64 system. Somehow, a git clone on a particular private repository will hang inside the chroot, while succeed natively. ...
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511 views

Solaris 10 installation on KVM constantly reboot

Successfully installed Solaris 10 sparc on KVM. However when I restarted the VM it doesn't go to login screen but just constantly reboots. I've read different documents link1 link2 link3 but none of ...
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1answer
93 views

Secondary bridge only working at random in debian wheezy

We are currently migrating from vmware server to kvm. So far everything works smooth, with the exception of the secondary bridge. Our network layout is as follows: Firewall with 3 ports eth0 Public ...
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1answer
484 views

Qemu Backing Files Question

If I'm creating a new.qcow2 qcow2 image based on a backing file (called base.qcow2) and the backing file is located on an nfs share. What happens if someone tries to modify, replace, or delete the ...
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129 views

Migrate a qcow2 image between storage pools

I have 2 storage pools. host_images (directory storage pool) remote_images (nfs storage pool) How do I copy qcow images from remote_images to host_images using libvirt APIs? I've tried using the ...
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1answer
95 views

filesystem that works under qemu and I can mount on my host

I'm using qemu for different kind of tasks, I would like to pick a filesystem that is both qemu-compatible and easy to mount under my host. I already discarded both qcow and qcow2 because apparently ...
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143 views

How to install Ubuntu 13.10 virtual machine on top of KVM running on Ubuntu 13.10

When I try to install LUbuntu 13.10 as a virtual machine using Qemu-KVM running on Lubuntu 13.10, I get a garbled screen when I start the virtual machine and/or when I start the installation process. ...
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5k views

ssh from host to guest using qemu

How do I setup ssh from the host to the guest using qemu? I am able to use port redirection when I boot the VM without any special parameters, as follows: /usr/bin/qemu-system-x86_64 -hda ubuntu1204 ...
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2answers
388 views

start qemu by giving it a path to a linux root

Good evening, I installed ArchLinux on a USB stick, and I would like to boot it in qemu. Unfortunately, most examples I found boot an image (iso..). The stick is definitely bootable as if I restart ...
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208 views

What is the structure of Libvirt Qemu VM dump/save files?

I need to do some exploration of Qemu-KVM virtual machines physical memory (particularly I need to check the fact of the physical memory intersection). In order to do that I'm trying to save VM's ...
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19 views

Unitary testing: emulating hardware connection or disconnection

I'm writing a program using libudev. And I want to write some tests. But, one of the functionalities of the program has to do with an usb drive being connected or disconnected. I've read plenty of ...
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1answer
796 views

How can I simulate usb storage device connection with qemu?

I'm writting a program for controlling usb storage device connections (this is a classic subject). All it's ok with my program, but now, I want to write some tests. So in order to do that, I realized ...
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2answers
1k views

running kernel on QEMU

I face this message: Failed to execute /initKernel panic - not syncing: no init found. Try passing init=option to kernel. I am using this command line: qemu-system-x86_64 -hda disk.img -kernel ...
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1answer
124 views

How much time do user => kernel mode transitions take?

I'm running Android-on-Linux, and communication of OpenGL ES calls over the QEMU pipe is very slow. QEMU pipes should be the fastest possible way to do this; could this be due to the repeated ...
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1answer
125 views

How to setup permission for virtfs in system libvirtd

I have troubles setting up the permissions for virtfs. I need to share a folder with several VMs in a way that user (same username, uid and gid on guests and host) can access it (have full ...
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1answer
293 views

What is qemu-img consistency check?

I would be glad if someone could explain the meaning of qemu-img check <filename> command. Man pages provide very poor information about it: check [-f fmt] [-r [leaks | all]] filename ...
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1answer
841 views

VGA passthrough - Code 43 with KVM and libvirt on all AMD hardware

I've set up a system with an R9-270 and an ATI Rage (PCI graphics card, doesn't use radeon driver) on an FX-8320 and an ASRock 970 Extreme3 R2.0 motherboard with the intention of running Debian Wheezy ...
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468 views

kvm usb modem passthrough

I'm trying to set up a USB modem passthrough in kvm virt-manager. The host is Fedora 20. The guest is Centos 6 $ ifconfig wlp0s29u1u6: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 ether ...
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1answer
70 views

Run Windows program on Linux in a secure way

I am trying to find a way to achieve a secure execution of Windows programs inside a Linux installation. I suppose that a Windows malware should not do any damage (infect the machine), if executed ...
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1answer
150 views

How to start a virtual machine filled with qemu-nbd?

I migrated a Windows OS (entire disk) to a virtual machine on another host (Debian with qemu and kvm). I used Selfimage to export the disk. On the host, first of all, I created an empty virtual ...
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1answer
856 views

qemu emulator for raspberry

I am trying to emulate a raspberry pi on ubuntu. I have tried several ways using several tutorials but every time, the emulator logs this: scsi: 0:0:0:0 ABORT operation started scsi: 0:0:0:0 ...
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Installing Ubuntu-13.0 Desktop in Qemu

Following are the details of my system: Fedora Core-18, i686. I am trying to install ubuntu in the qemu. Following are the commands I executed: qemu-img create ubuntu.img 8G qemu-system-i386 -hda ...
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1answer
3k views

How do I get my mouse back from qemu/kvm?

I'm running qemu/kvm on Debian testing x64 with this command: kvm -m 1024 -hda win7.img -cdrom win7x86.iso -boot d -net user but when I click inside the virtual machine, qemu captures my mouse and ...
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Qemu: No file system could mount root (unable to mount roofs)

In Linux, I've created the root file system (rootfs) by following commands: dd if=/dev/zero of=ramdisk.img bs=1M count=4 mkfs.ext2 ramdisk.img sudo mount -o loop ramdisk.img rootfs sudo cp init ...
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1answer
1k views

Qemu Arm how to passthrough a PCI Card

I'm trying to access a PCI wifi adapter on a Qemu, simulating vexpress-a9 board. I'm following is this tutorial which shares a passthrough PCI card of the host machine to a guest machine running on ...
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1answer
918 views

QEMU package not available for RHEL 64 bit

I am installing QEMU in RHEL. In 32 bit OS (i686 architecture), if I run the command, yum install qemu, the installation of QEMU takes place. However, in 64 bit architecture (x86_64), if I run the ...
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1answer
236 views

QEMU for ARM programs with GDB [closed]

I want to emulate an ARM processor for running the assembly programs using QEMU in RHEL. I have installed QEMU but I still have problems in running the assembly program. I got the assembly program, ...
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1answer
89 views

How to reach only an application in QEMU emulation without X?

I run an OpenBSD guest on an OpenBSD host (Desktop) with QEMU. Because I want to run a webbrowser in a separated environment. I can reach the QEMU machine via ssh -X so I can see the webbrowser. But ...
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1answer
497 views

Installation of QEMU, GCC for ARM in RHEL

We are setting up a lab which has the QEMU system to emulate an ARM processor and run assembly programs. The lab is currently setup with the host operating system as Ubuntu. We are migrating the lab ...
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1answer
158 views

Using qemu to boot OpenSUSE (or any other OS) with custom kernel

I want to run OpenSUSE as guest with a custom kernel image which is on my host machine. I'm trying: $ qemu-system-x86_64 -hda opensuse.img -m 512 -kernel \ ...
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1k views

shared LVM storage between KVM virtuals

I'm messing around with KVM and different storage options for sharing between virtual machines. I have an LVM volume group defined as a storage pool for libvirt. I've defined a volume and attached it ...
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3answers
679 views

How can I get kqemu or even just qemu to show up in virsh capabilities on CentOS 6.4?

I have a CentOS 6.4 box that I'm trying to set up a VM on to run WinXP. This box doesn't have VT, which may not be ideal, but I'll settle for less than ideal. Apparently I should be able to install ...
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177 views

Getty not starting in qemu

I'm trying to get running an ARM based Debian inside qemu. As a rootfs I'm using structure from embeddedarm 2gb sdcard image with versatile 2.6.24 kernel downloaded from fedora qemu tutorial site. At ...
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108 views

No network interface for the lan9118 emulated on QEMU 1.4.0 overo machine

Im using QEMU 1.4.0 Ubuntu 13.04 distribution. Im trying to make the virtrual machine part of the host network so Im ussing this command: sudo qemu-system-arm -M overo -m 1024 -sd ./test.img -clock ...
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1answer
500 views

How can I figure out which pty's are from which qemu?

I'm running qemu's like this: $ sudo qemu -boot d -m 1024 \ -netdev tap,id=tap0 \ -device virtio-net-pci,netdev=tap0,id=vth0 \ -drive file=ubuntu.iso,media=cdrom,cache=none,if=ide \ -monitor pty \ ...
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1answer
651 views

Emulate unplugging a network cable with qemu-kvm

[Background: I'd like to actually test How to take down a static network interface when not connected? ] I'm setting up a QEMU-KVM virtual machine using libvirt (via virt-manager). I put two NICs on ...
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omap3530/3630 emulation on QEMU for overo and beagle machines

On QEMU's source code for beagle and overo I can see that the cpu emulated is the OMAP3430. I will like to know if it's a way to make QEMU emulate OMAP3530/3630 cpu's for those machines? On bealge : ...
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3answers
2k views

QEMU how to ping host network?

I'm trying to ping from guest to my host network without success. qemu-system-x86_64 -hda debian_squeeze_amd64_standard.qcow2 -netdev user,id=user.0 -device e1000,netdev=user.0 I try to ping a ...
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2answers
726 views

ttyO ports do not have the good port address on QEMU 1.4.0 running image for beagleboard-xm

I'm running an Linux Image (kernel 3.2.8) for beagleboard-xm on QEMU's 1.4.0 emulator Ubuntu distribution for 13.04. My image is created using Buildroot beagle_defconfig. I added some pkgs to be able ...
2
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1answer
57 views

Theoretical possibilities for cpu emulation built into boot-loader or kernel?

Is it a crazy idea to somehow make a blend of grub and qemu in order to boot linux kernels or any kernel of any cpu type supported by qemu or the built-in cpu? I know it might be impossible to detach ...
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1answer
333 views

What are the right settings for Ubuntu Touch under qemu?

As you can see here, Canonical is releasing the images for Ubuntu touch, the problem is that apparently those are snapshots from a complete installation, there is no installer here and no vmlinuz + ...
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1answer
411 views

Booting grub legacy via qemu using pxe

I have been trying to boot grub legacy via qemu using pxe. For some reason, the grub does not display the menu and enters into the command mode after displaying the following error. Error15: File not ...
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3answers
474 views

NFS server on qemu guest

I need to know how I can mount block devices, placed on a qemu guest system, from host. So in this case we have NFS server placed on guest system and NFS client on the host's side. There are a lot ...
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1answer
2k views

Networking and Samba from a quest OS running on qemu

I'm trying to test some software on a big endian system to ensure compatibility. My plan is to use qemu on Ubuntu 12.04 to emulate a MIPS system. So far I've been able to create the quest system ...
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1answer
160 views

QEMU Direct Access to Video Card (or, QEMU Video Output without X11)

I have a system that boots up into Linux at power on and then needs to boot into Windows XP Embedded. After messing around with kexec and grub4dos, things aren't working out too well. One idea that ...
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1answer
167 views

How much success can I expect with Qemu On PowerPC Linux?

I'm on Ubuntu 12.04 for PowerPC and I installed Qemu just for kicks, having experience using it in the past to build an iso for an arm tablet, and upon doing a search I found this installed on my ...
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2answers
1k views

Iptables port forwarding to qemu vm

Is it possible to create an IPtables rule that forwards all incoming traffic on port 80 on the host to port 80 of the qemu VM? Is such a scenario possible with qemu?
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Preparing an initrd for qemu [duplicate]

I have compiled a bzImage but when I try to run it in qemu I get a kernel panic because I don't have an initrd file. So I create one by following the steps in this question but I cannot get it to ...
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Linux kernel is not finding the initrd correctly

I had compiled a linux kernel and I wanted to debug it in QEMU. I created a file to boot from by doing the commands $ qemu-img create -f raw disk.img 200M $ mkfs.ext2 -F disk.img # mkdir /mnt/rootfs ...