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

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Correct way to use Qemu terminal mode in Byobu via SSH [on hold]

I'm trying to start qemu via ssh on a server without X11 installed, using byobu and these command: qemu-system-x86_64 -cdrom /backup/installer/archlinux-2016.05.01-dual.iso -boot order=d -drive ...
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11 views

qemu-img convert burning CPU for nothing

I'm trying to reduce the usage of a qcow2 image. I did the following: qemu-img convert -p -f qcow2 -O qcow2 my_img.qcow2.backup my_img.qcow2 I outputs 200192 bytes and progress is stuck at 0.00%. ...
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1answer
34 views

Android-x86_64 installer does not boot in QEMU/KVM - EFI Shell appears instead

I downloaded Android x86_64 5.1-rc1 as bootable img installation image. I want to install it to a virtual machine running on Ubuntu 16.04 64 bit with UEFI using QEMU/KVM and virt-manager as graphical ...
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23 views

Is it possible to add description to qemu VMs?

Is it possible to add description to qemu virtual machines? I mean something similar to qemu -enable-kvm -description "RHEL test-host" .... This would allow one to easily identify virtualized hosts in ...
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understand “-netdev” option in qemu

When I start qemu with -device e1000,netdev=network0 -netdev tap,id=network0,ifname=tap299,script=no,downscript=no, then am I correct that this id=network0 creates an association between vNIC and ...
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69 views

Arch linux ( kvm/qemu virtualization ) failed to open libiscsi.so.4

I have fallowed the steps from Arch Linux #KVM and #qemu 1) sudo pacman -S then installed libs libvirt libiscsi libaio qemu qemu-arch-extra qemu-block-iscsi qemu-block-rbd qemu-block-gluster ...
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Which ports to open in ufw for Windows in QEMU

I'm running Windows 7 in QEMU under Debian using bridge-networking. However when i have ufw enabled and start Windows i can not connect to the Internet. As soon as i disable ufw the virtual ...
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37 views

CVE-2016-3710 mitigation in CentOS 7

I have a box running CentOS 7 for KVM virtualization purposes. What is proper steps to mitigate CVE-2016-3710 in my OS? $ rpm -qa --changelog qemu | grep CVE-2016-3710 shows nothing. Current ...
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Qemu and booting images

Complete beginner question: why do I have to pass an extra kernel binary when running e.g. a Debian image on an emulated Raspberry Pi? So far all docs state, the image files pose the equivalent of a ...
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27 views

Execute command inside guest vm Libvirt

Is it possible to execute a command for eg:iostat inside a guest VM using libvirt or virsh .I want to find out IOPS for a guest vm but with libvirt java api I am not able to get the IOPS of a vm ...
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21 views

Libvirt: no way to use isa bus?

I found a way to run Windows95(I'm a little nostalgic and I use old systems for testing) with qemu /usr/bin/qemu-system-i386 -L pc-bios -m 64 -hda /home/user/.local/libvirt/images/win95.img -net ...
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32 views

Performance issues running Linux Mint on qemu-kvm - maybe run in textmode and use remote graphics for administration?

we are running virtual servers on kvm-qemu, using debian wheezy as a host system. Unfortunately one server is based on Linux Mint 17.3. One big issue is the performance of Linux Mint based on kvm. ...
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21 views

xming / startx - cannot use the GUI

I'm unsure if this is the right place to ask my question but I shoot anyway. If it is not the case, i'll close it I started a GUI with startx. I'm happy with the results. However, as you can see I ...
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1answer
146 views

Booting a raw disk image in QEMU

I have a disk image file from here; that page says I can boot this image with QEMU and the following command: $ qemu-system-x86_64 -m 4096 -ctrl-grab -no-reboot x86-64.img That gives a message: ...
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82 views

How to run a Raspiban in QEMU

How do you run a standard Raspbian image in QEMU? I'm following the instructions in this wiki, but the first step is failing. I downloaded the kernal kernel-qemu-4.1.13-jessie and the Raspbian ...
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1answer
48 views

How can I merge 2 disk images into one with 2 partitions?

I have 2 (relatively small) disk images for qemu (raw format) containing different filesystems (say fat and ext4). I want to put them into an usb stick as two different partitions so that I can plug ...
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68 views

Is it possible to access qemu monitor when VM is already running?

I have a qemu VM running in daemonized mode: qemu --enable-kvm -daemonize -m 512M -device e1000,netdev=network,mac=52:54:00:12:34:58 -netdev tap,id=network,ifname=tap301,script=no,downscript=no ...
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Bridging two virtual machines on difference bridges

I have two VMs: vm1 & vm2. The host and VMs both are Ubuntu 14.04 LTS. Each VM "connects" to a bridge which connects to a virtual ethernet interface and end up at eth0 i.e. vm1 (192.168.0.23) ...
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47 views

What step am I missing to get my 2.6 ARM kernel running in QEMU?

I am trying to cross-compile and boot a Linux 2.6 kernel for ARM using QEMU. I have basically followed the same instructions that are included in seemingly every single tutorial on the topic. ...
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qemu-system-arm problems adding second NIC/bridge

I am running Qemu under a host with two bridge interfaces and would simply like to bridge them to guest NICs. All of this works fine when bridging one NIC either by creating a bridge manually or using ...
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How to firewall qemu/kvm guest in host machine?

I have a qemu guest with following network topology: Internet <-> eth1.96[bridge]tap96 <-> eth0[guest] I need to allow access to guest machine only from one specific /24 network and I ...
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1answer
26 views

utility to view qemu virtualized hardware

I have one qemu VM running in my PC: # cat -A /proc/$(pgrep qemu)/cmdline | sed 's/\^@/ /g'; echo qemu-system-x86_64 -enable-kvm -no-user-config -daemonize -cpu Haswell -smp 2,cores=2 -m 4G -device ...
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qemu - linux kernel doesn't recognize the supplied disk image

I'm trying to run Linux kernel on qemu from scratch. I've started working on a minimal configured kernel (after running make allnoconfig) and trying to configure only the things needed. So I have an ...
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87 views

How to mount qcow2 image

I've read that with qemu-nbd and the network block device kernel module, I can mount a qcow2 image. I haven't seen any tutorials on mounting a qcow2 via a loop device. Is it possible? If not, why? I ...
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37 views

Trouble accessing QEMU monitor without X or VNC

I am using QEMU on Debian, I am running Windows guests, I have no X environment installed and i am not trying to use a VNC server. I am starting QEMU directly from the console and using VDL to display ...
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104 views

How do I install Remix OS in GNOME Boxes?

Remix OS is an interesting desktopification of Android. It can run off a read-write-able USB stick but it doesn’t have an installer. I can boot it up in GNOME Boxes just fine, but as I’m just running ...
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47 views

qemu: boot from cdrom

I'm trying to install xubuntu on a usb flash drive following this quide. The command I'm running is qemu-system-x86_64 -drive file=/dev/sdc,media=disk,index=0,format=raw -cdrom ...
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29 views

Curses interface for text-mode Xen DomU's

QEMU implements an -options curses (previously -curses) flag for text-mode OSs. From the qemu(1) man page: Normally, QEMU uses SDL to display the VGA output. With this option, QEMU can display ...
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qemu-kvm on windows, use cd/dvd drive direct access

Friend asked me to remotely (teamviewer) diagnose why CD/dvd drive on his windows laptop do not recognize (nor even eject) any CD... It is probably windows10-driver error, but reinstaling drivers do ...
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How do I specify an alternative bridge interface (not br0) when using qemu-bridge-helper

By following the instructions found at http://wiki.qemu.org/Features/HelperNetworking I can configure qemu with qemu-bridge-helper, however, I can't figure out how to pass a bridging interface option ...
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51 views

Booting into linux kernel 4.1.3 using qemu

I am trying to boot into a compiled Linux 4.1.3 bzImage (disabled modules, so I only had to make bzImage). Correspondingly, I installed ubuntu 15.10 (with Upstart, not systemd) on a qemu cow2 image ...
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How can I store files in the mounted shared folder?

I am running a Fedora Workstation virtual machine on an Ubuntu host. I created a folder /home/cl/share in the guest and mounted the shared folder /media/cl/system/virtual/share as root following the ...
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How to debug a bash script in a qemu-arm chroot

I'm running a debian debootstrap script which creates an arm system. However, the script fails at some point and the error message does not really help. So I'll have to do some more debugging which is ...
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how qemu interacts with guest os io requests?

the Linux io stack (eg the path of an io request) is something like this: now when such a guest OS is a Linux distro in qemu, the path is the same except in this case there is no disk and scheme is ...
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38 views

Dive into qemu source code to trace io requests

I searched a lot about qemu and read its documentation but could not find any explaining its I/O stack. Specifically, I want to know about how an I/O request is created and what path it travels to ...
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59 views

QEMU kernel panic to serial port

I'm working with kernel 2.6.13.1 on Debian 6 with QEMU/KVM for a class. The kernel, once installed, panics on boot. The curses interface to qemu doesn't seem to allow scrollback to view the entire ...
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1answer
56 views

Qemu curses interface dimensions

I'm running a virtual machine from qemu with the -curses flag in order to view it over a slow ssh connection. Everything works well enough, but the terminal window that I have to interact with the ...
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59 views

Qemu error: internal error: QEMU / QMP failed: qemu-system-x86_64: PCI bus not available for hda

I get the error below when trying to start my vm with serenity ~ # virsh start winxp-gaming error:failed to start domain winxp-gaming error:internal error: QEMU/ QMP failed: qemu-system-x86_64: PCI ...
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85 views

Easiest *non-networking* method of communication between Linux host and Windows guest [closed]

I'm writing application software for Ubuntu which needs to communicate with another application running in a Windows Virtual Machine via Qemu on the same machine. I have full control over the source ...
3
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1answer
157 views

Can I enable cephx authentication using a pool in qemu/kvm?

(CentOS 7, Ceph Incunabulus, everything patched up to date) Background I've got a working converged Ceph/qemu/kvm cluster with cephx enabled for authentication. I'm trying to use this to store block ...
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141 views

Installing qemu-kvm 2.5 on Centos 7

Are there any repos out there that carry the most up-to-date version of qemu-kvm as well as dependencies? I ask because the newest qemu-system has a HUGE list of dependencies and I would like to not ...
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Linux Kernel is panicing on boot

After following this blog post I get a kernel panic when running: qemu-system-x86_64 -kernel bzImage -hda my.img -append=/dev/sda What could be causing this? Could I have left something out?
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167 views

Make synergy work between qemu host and guest

I have a working configuration of a Gentoo as a host and a Windows 10 as a guest using QEMU/KVM with GPU passthrough. I also passthrough my keyboard and mouse, and have a secondary keyboard in a ...
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How to disable QEMU guest access to host ports

I'm using the following command to run a QEMU VM: qemu-system-x86_64 -enable-kvm -m 1024 -smp 2 -hda disk.qcow2 By default, the guest OS has internet access, but can also access open ports on the ...
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48 views

Category of QEMU

I am a beginner of learning architecture of VM. Some questions cannot find clearly through the internet. There are two kinds of VMM(Virtual Machine Monitor) accord to their virtualization level, ...
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Problem with xv6 on qemu

I was doing the assignment on this link --> http://zoo.cs.yale.edu/classes/cs422/2013/lec/l2-hw After running make qemu the assignment document says A separate window should appear ...
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1answer
2k views

Qemu USB passthrough (windows guest)

I have a USB ADC/DAC and a HASP protected proprietary data acquisition system for it, both of which do not work in linux. I am trying to make it work in Windows virtual machine using qemu. Here are ...
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Virt-manager Permission Denied when accessing NFS pool

I'm currently having this error when I'm trying to install a Virtual Machine on my NFS share. i've added my NFS share (coming from FreeNAS) to a Storage Pool on the virt-manager Another issue is ...
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/dev/kvm is missing from system supporting kvm-virtualization

I'm trying to enable kvm-virtualization for Android virtual devices. In order to do so, I followed this guide and did the following: Checked, if kvm-virtualization is available: user $ grep --color ...
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Running QEMU inside XEN virtual machine

Is it possible to run QEMU inside XEN virtual machine? I tried to enable the XEN nested virtualization for with following options to virtual machine configuration file in /etc/xen/vm1.cfg: hap=1 ...