QEMU (short for "Quick EMUlator") is an open source machine emulator and virtualizer.

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Get custom kernel parameter variable of booting qemu

Im currently using qemu on windows for testing my own linux distribution. its a embedded version built with buildroot. After building the distribution i have created a iso file. When i start the ...
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Communication with Windows Guest OS run in Qemu

Using a headless Ubuntu 14.04 server, I'm running a Windows 7 guest in Qemu to which I am passing through the GPU (for performance). I am writing an application for which part will be running in Linux,...
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1k views

How To Change The Floppy Image Of Qemu?

I'm developing my own OS, but I'm having some problems with Qemu, because I need to change the floppy image from grub.img to os.img while the emulation is running, but how can I do this?
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How do I convert an .img file to vhd?

I have an image file (linux based image) and want to convert it to VHD so that it can be used to create hyper-V VMs. I used "qemu-img convert" to convert raw to vpc format, but vpc doesnt work for ...
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196 views

libvirt: “Failed to initialize a valid firewall backend”

What I'm tryna doing I'm trying to set up a virtual NAT network device without DHCP for libvirt on an Arch Linux host. What I've done so far # virsh net-define network.xml Network default defined ...
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11 views

How to quit QEMU monitor

I'm running QEMU on Linux without GUI. After running starting my custom kernel with QEMU, I can't kill and return to host by pressing Ctrl+C. Is there any way to get back to host OS?
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How to install OS using Rescue Mode?

What we have: A server with a Linux distribution on it. No physical access to that server. The server can be accessed via Serial Terminal or via network using SSH, for example. I can also boot that ...
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40 views

How to boot Windows 7 UEFI recovery partition?

I've got an image of a hard drive that won't boot from within a Qemu VM. I managed to get UEFI working using OVMF, but it still won't give me an option to boot the recovery partition. Given that I ...
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How to boot a physical Windows partition with qemu?

I have gentoo and windows 7 installed alongside on my only hard drive. I want to start my windows install from within gentoo through qemu. Boot menu works fine but windows bluescreens on me soon after ...
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17 views

Emulating PPC Arch on linux

I am currently trying to get a PowerPC architecture emulated running using qemu-kvm on my centos box. I currently have qemu-kvm installed however I see a lot of tutorials https://gmplib.org/~tege/...
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599 views

qemu-kvm Windows 7 GUEST with vga passthrough doesn't work

Ok so I have a qemu-kvm Win7 VM setup. When setting it to use the standard vga output "-vga std" it works fine. Windows loads up, displays, no problems. If i set -vga none \ -device vfio-pci,host=...
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QEMU sparc displays only a black screen

I'm trying to play with an old Redhat install on Sparc, so I do this to create a disk image: qemu-img create -f qed redhat.img 2G Then this to start it: qemu-system-sparc -bios ss5.bin -vga cg3 -g ...
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2k views

QEMU within VirtualBox and bridged connections all the way down

I'm trying to get an ARM QEMU system out on my LAN. I tried running QEMU directly from Windows (Windows 7 x64), with success except I could not get a TAP adapter to bridge to my wireless connection. ...
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172 views

How to boot a USB 3.0 SATA HDD inside a Windows 7 Qemu Virtual Machine

I have a Windows 7 VM, that I would like to recognize a SATA HDD that is plugged into a Voyager Q (USB 3.0 "enclosure"). I have tried various commands, and tried logging the output of the command ...
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accessing core microarchitecure in QEMU, HOW?

I have two questions: 1) Is QEMU a full system simulator or a virtalization layer? 2) when it installed, Is it possible to access micro architecture elements of a core such as registers ,...? I need ...
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34 views

qemu: emulated nic is too fast

On archlinux, I started a VM with qemu emulating a rtl8139 network card by giving it the following parameters: -device rtl8139,id=nic0,netdev=tap0 -netdev tap,id=tap0,ifname=tap0 After booting the ...
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1answer
699 views

QEMU with GPU pass through won't start

I'm running Ubuntu and trying to configure QEMU with a GPU pass through. I was following those guides: https://www.youtube.com/watch?v=w-hOr44oBAI https://www.pugetsystems.com/labs/articles/...
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32 views

How to configure qemu with a raw drive, but have it not fail if the drive is missing?

I'm using Proxmox, which uses qemu under the hood. I have a vm that needs to access drives directly, so I have lines such as the following in my .conf: sata1: /dev/disk/by-uuid/f203be0a-4135-4964-...
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30 views

Vagrant private network with connection to the Internet

We have a set of integration tests which spin up several virtual machines. These VMs communicate with each other but also needs access to the outside world (e.g. yum repositories). We're considering ...
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vga-passthrough with kvm/qemu on optimus-capable laptop

i have an asus n550jv laptop with the following output from lspci -nn | grep "VGA|3D": 00:02.0 VGA compatible controller [0300]: Intel Corporation 4th Gen Core Processor Integrated Graphics ...
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1answer
347 views

Control fan speed under linux without nvidia drivers

I have quemu-kvm configuration like this - IGP on host (linux) and Nvidia on guest (windows). I blacklist nvidia drivers under linux (arch dist.). Is there a way to set GPU fan speed under linux (it'...
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59 views

How to increase size of an ubuntu cloud image

I have been trying to start a VM using ubuntu cloud images. Now, the image size is very less, I am getting around only 2GB of space. Is there any way to increase the size? I tried qemu-img resize, but ...
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65 views

KVM/QEMU Guest mounting Host Storage

I'm running CentOS 7 on a host machine and I'm wondering the best practice to automatically mount a hard drive for a KVM guest. I've made an Illustration to help describe what I'm trying to do. The ...
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1answer
18 views

Creating a libvirt URI to hop to another host

I have a Qemu-Host running libvirtd which is properly configured (h0). I can only access this host via another machine (c0), which only acts as a gateway. Now I need to know if it is possible to get a ...
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29 views

KVM virtual Win 7 instance not genuine

Running kvm, qemu, libvirt... and have six virtual machines, five Linux, one Win 7. All the Linux instances are running perfectly as is the win 7 instance, but... After installing the Win 7 machine we ...
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694 views

Unable to configure KVM (Qemu or Libvirt) on openSUSE Leap 42.1?

I simply want to run multiple VM (not at the same time). I want them to be stored in another partition (mounted here /run/media/shark/VM) and not in the default storage pool /var/lib/libvirt/images/...
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5 views

Virtual Machine on Limited User Account

I want to run a virtual machine on my limited user computer. I do not care how slow it is I just need to get a VM going. I heard about QEMU portable but the website download is offline. Where can I ...
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293 views

Not able to boot Debian arm64 on Windows using Qemu

I am running a Windows machine and I want to emulate a Debian OS with arm64 architecture. I downloaded an ISO file to setup a fresh VM. I used the following command: qemu-system-arm.exe -cdrom debian-...
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88 views

Bridged qemu machine cannot receive packets, these are dropped

I've created virtual machine (ppc) with bridged interface (using bridge helper) on archlinux. Machine can send packet out, but cannot receive anything. I can see packets (dhcp discover,request and/or ...
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1answer
360 views

Need qemu to run headless on host, but still forward graphical output via x11

I have a headless host with qemu installed. I can ssh into the host, and forward x11 so I can view graphical output. However, when I try to run qemu, I get the following error: Could not initialize ...
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Installing Windows 8.1 64 on Qemu Fails - no disk can be found due to Virtio driver issues

I'm unable to install Windows 8.1 x64 with the following steps on a qemu virtual machine: qemu-img create -f qcow2 Windows8.img 20G qemu-system-x86_64 -machine pc,accel=kvm:tcg -cpu host -m 2048 -...
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15 views

VM inside host VM cannot see avx cpu flag

I have an Ubuntu 14.04 server installed on a VM inside VirtualBox. This VM acts as my host for other VMs. I ran a Linux based image using qemu inside this host VM. The host VM has cpu flag avx but the ...
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101 views

Wanting to run x86 binaries in Crouton Linux on dev-enabled Asus Chromebook Flip (ARM)

Yes, I know this may be very esoteric. :) I have a few simple x86 programs which run fine using Wine in any stock x86 desktop Linux. None of them have any 3D graphics or unusual hardware needs. I'...
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139 views

How to create a secure KVM/QEMU (libvirt) smb/cifs share host to client?

I run a Ubuntu Server 14.04.03 LTS as host machine and the same os version as virtual client (minimal virtual kernel) with KVM on the same machine. I run two physical Ethernet cards on the physical ...
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Accessing postgres DB from guest

I have win7 guest on qemu-kvm with NAT inteface. And want to connect to postgresql database running on host (port 5432) from guest. Configuring tap/bridge interface is the only way to solve this? I ...
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306 views

Create “linked clone” or layered shared disks with QEMU

Does QEMU support a feature like VMware's "linked clone"? What I'm trying to accomplish: I'm setting up a test environment with a handful of VMs, that are all nearly identical. However, a fresh ...
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477 views

QEMU/KVM can't set qxl video ram size

I'm trying to enlarge video memory size of qxl-vga device. Guest os (windows 7) shows only 16mb of video memory available. I've installed windows guest tools. When I'm trying to set more video memory ...
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Centos 7 KVM cifs mount issues

I am having a issue with Centos changing my KVM images folder from the default to a Cifs Shared folder. Any time I try it, it returns a error like so: [root@localhost Centos_Atomic]# systemctl status ...
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39 views

Raspbian in qemu ssh not working

I recently downloaded qemu to emulate raspbian.It works but I wanted to show to a friend with ssh but when I write ifconfig and press enter they give me an ip address that not working when I try to ...
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58 views

How to convert qcow2 to VMDK in openstack kilo

I was trying to convert qcow2 to vmkd in Openstack Kilo version using the qemu img convert. qemu-img convert -f qcow2 osname.qcow2 -O vmdk osnamenew.vmdk But the converted image while booting in ...
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223 views

Installing VMs in CentOS 7 host from ISO?

I'm trying to install a CentOS 7 guest in a CentOS 7 host, using text only. I'm using simillar commands as: virt-install --name centos7 --ram 1024 --disk path=/var/kvm/images/centos7.img,size=25 --...
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Difference between an qemu instance with identical args started manually and by libvirt

I have a VM managed by libvirt. I'll call it ExampleVM here: Id Name State ---------------------------------------------------- 55 ExampleVM ...
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155 views

Cannot allocate memory QEMU

I'm currently running Windows 10. I tried to use QEMU on my PC to emulate Windows 98 Live CD, everything worked perfectly until I tried to allocate more memory than the default(128MB). I tried to use ...
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KVM / Qemu Virtualization Live-Snapshot

im running an Ubuntu 14.04 Host with KVM/Qemu (libvirt) as virtualization host. Now im here to ask for the best practise about creating snaphots for the whole VMs. i read much about a Live-Snapshot ...
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3k views

How do I create a wifi network bridge with qemu on OS X?

I grabbed a small FreeBSD live CD and QEMU, and I'm trying to bridge my Mac OS X 10.8 wifi connection so that the guest OS is available on my LAN. However, the guest OS never gets a DHCP lease. This ...
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25 views

What determines the name QEMU will give a drive?

I am playing around with GRUB 2 as a BIOS for QEMU. I expected that I could just use hd0,msdos1 as the root for GRUB, but it looks like it is not that simple. When I boot a VM with qemu-system-x86_64 ...
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2answers
723 views

iPod Touch 5G won't recognize in qemu Windows 7 VM

I have an iPod Touch 5G, and a Windows 7 VM. I am trying to pass through the iPod Touch to the VM so Windows can recognize it, but I am getting the following error in the qemu monitor. (qemu) ...
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1answer
320 views

Use host's onboard/integrated graphics from a virtual machine

Is there a way to let a VM access/use a monitor connected to the motherboard's VGA port as if it were its own monitor with KVM-QEMU?
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How to make Windows XP screen in qemu take size of the window?

I remember Virtualbox had a feature allowing it with some guest additions to make the screen of the OS in the virtual machine take size of the window. I’ve installed Windows XP in qemu that I use now (...
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3k views

Virtualize an existing windows 8.1 installation on arch

I have the following setup: Intel i5 4570s SSD for os sda1: EFI boot partition sda2: ext4 with arch installed sda3: swap sda4: microsoft reserved sda5: ntfs with windows 8.1 installed HDD for data ...