Questions tagged [qemu]

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

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How to get the same network with QEMU than VirtualBox

I've 2 VMs Debian 9.4 : one working trough VirtualBox ; the other working trough QEMU. I configured a bridge on my workstation like this : ip tuntap add dev tap0 mode tap group 1000 ip link set dev ...
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macOS terminal -> ssh centOS with X Forward -> qemu Debian - keyboard/mouse are not behaving correctly

My situation: I am using a Macbook with High Sierra and it's default terminal application + XQuartz I am connected to the remote server running CentOS 7 that acts as a hypervisor I am trying to ...
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212 views

QEmu shared folders for Debian Etch

I have to work with an old Debian release - Etch (4.0r9, kernel 2.6.33.7) - as the guest OS in QEmu/KVM. The host is Ubuntu 16. I created a shared folder in Virtual Machine Manager. However, when I ...
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710 views

Passing USB controller to VFIO Virtual Machine

Im running a Windows 10 VM using qemu version 2.10.1 on kernel 4.14.1 with a GPU passed through. I can also pass through an Intel-based USB controller. So far so good. My Intel USB controller does ...
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373 views

Write to M25P80 Flash

I am looking for a way to move data onto a Micron M25P80 Flash Card over SPI bus on a Xilinx Zynq 7100 emulated in QEMU. I am not sure which driver to use. I would like to use the Cadence SPI driver ...
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943 views

With QEMU/KVM, I get a poor display quality with a linux guest and host

I'm new to QEMU/KVM. I've created a new VM with the GUI (Virtual Machine Manager) and installed in it Kubuntu 14.04 (my host is Kubuntu 17.04). The quality of the display of the guest is very poor. ...
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596 views

How to boot a .efi file using QEMU?

Well, thats all, how can I boot a .efi file in QEMU? I'm almost new to this EFI world and I dont know how to start, should I make an iso, what would be the internal structure of that iso? Thanks in ...
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583 views

VM: how to virsh managedsave-remove from the libvirt QEMU hook?

I need to do "virsh managedsave-remove VMname" from a libvirt QEMU hook. https://www.libvirt.org/hooks.html says: "Calling libvirt functions from within a hook script - DO NOT DO THIS!: A hook script ...
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389 views

Virtual machine does not seem to detect my GPU as 'primary'

If I enable a cirrus gpu this way : '-vga cirrus' while passing through my GPU, the cirrus display will be stuck at starting windows and the GPU will display windows properly. And if I put not vga ...
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Virtual machine hanging on shudown

I asked this over on 'Ask Ubuntu'; it got upvoted but didn't attract an answer so I am moving it here. I am running Ubuntu 16.04.2 fully updated. I have a virtual machine running 14.04.5 using kvm ...
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1answer
285 views

How to measure Down time for VM migration

I am using KVM with virt-manager to migrate the virtual machines from one system to another. VM Migraiton is successfully done and migration time is measured correctly. Now, I am stuck for how to ...
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437 views

shared folder with fix permissions - vm libvirt qemu

I am trying to setup a virtual machine structure with a data storage on the host machine. I have 3 virtual machines. All of them, including the host, are running ubuntu 16.04 server. So what I want ...
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252 views

How can I configure scheduled virtual machine backup?

I have a box with: Debian 8.3 Jessie in minimal config 16 Gb RAM 4-core Intel SandyBridge 2.5 Ghz 2 x 300 Gb SAS in RAID10 (using hardware controller) qemu-kvm and virt-manager are installed ...
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509 views

QEMU: SSH connection from Guest(Androidx86) to Host (localhost/no internet connection)

I am using Linux Mint 18 as a host and with Qemu i' running an Androidx86 guest. It works perfectly fine for normal use but there is one thing I would like to be able to do. I need to execute a ...
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644 views

Mount Linux host directory inside QEMU FreeBSD guest

I am managing a few FreeBSD 11 QEMU guests on a Linux host (kernel: 4.9). I would like to mount a directory from the Linux host into the FreeBSD guest. I have done a similar thing with Linux guests ...
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113 views

qemu + windows 10 strange behavior

My goal was to passthrough GPU to a windows 10 machine. After installing the system, I noticed that the resolution was awful and, unsurprisingly, the adapter was standard vga graphics adapter (or ...
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367 views

problem with qemu emulation, "black window!!"

I am running Ubuntu 16.04 x86, a kernel linux-4.9 and I followed this tutorial and everything works perfectly, but when I run qemu with: qemu-system-arm -m vexpress -a9 \ -kernel linux-4.9/arch/arm/...
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86 views

Networking with Graylog in Qemu?

I want to run Graylog inside a qemu VM, then send it logs and access its web interface from the host OS. First I created a Debian Jessie VM and installed Graylog using their official guide, then I ...
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814 views

How to gracefully exit Qemu VM with running kernel

To make sure that my prerequisite knowledge is even correct, I'll first explain what I'm doing (or think that I'm doing). I'm going through a tutorial on running a Yocto Linux kernel inside the Qemu ...
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440 views

Qemu backup software?

I have a self build NAS (Debian) which is running about 5 VM's for different things (NAS, VPN, Time Machine, Media etc). The Host is a bare Debian install. VM's are managed using virsh in the command ...
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302 views

PXE installation from VM to another VM

I'm trying to do a PXE installation from a VM to another VM. At the host, I'm using RHEL. I created a VM (srv-inst) with RHEL using virt-manager. The network is the default (NAT) and it is isolated. ...
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467 views

Boot uboot linux kernel on a VM

I have a compiled kernel and uboot images like so: u-boot.bin uImage I compiled them using the arm-none-gnueabi and fsl-linaro toolchain. How can I boot them as in a virtual machine? EDIT: The ...
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508 views

Emulating Big-Endian Basic Kernel Image

So after much difficulty, I successfully cross-compiled a basic linux kernel for powerpc to test some big endian code. As I'm on a relatively weak machine and have to compile a relatively large code-...
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146 views

Concurrent guest vcpu operation on KVM

I am launching an x86 debian system as guest using QEMU2.6.0 on my x86 host machine. The host is an 8-core, 2-socket machine booted with RHEL7 with KVM enabled. 2 PCI devices are being emulated on ...
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316 views

Fedora Host, Kali VM, KVM/QEMU mouse not working

I have a Fedora 23 host, and I tried to install Kali Linux using Virtual Machine Manager, and every time I did it -- no matter how I configured it -- the mouse would not work. It would only go down ...
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2k 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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1k 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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436 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 running on KVM. ...
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1k views

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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899 views

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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521 views

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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206 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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3k views

/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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620 views

Installing qemu-user-static and binfmt-support inside an LXC

I'd like to run armhf executables inside an amd64 LXC container. How to do that? update-binfmts --display shows no qemu interpreters.
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158 views

Golden image updates in qemu

Consider that there are 100 windows virtual machines coming from a single base image and each vm is added to domain along with minor other machine specific settings which can be done by a script. ...
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1answer
306 views

How to run Windows with GPU virtualization?

A year ago I switched to Ubuntu for my primary OS, which has worked out just fine. Every now and then I want to play computer games and while using Wine often works, I can't get all of the games that ...
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748 views

Qemu Linux(kernel with debugging symbols) and ARM

I'm looking for a Linux ARM kernel, disk image and initrd that is compiled with debugging symbols. I'm looking to debug the kernel using the qemu and gdb. Could you point me to an arm linux image that ...
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674 views

Why Debian Jessie is turned off instead of rebooting after installing qemu-kvm?

I'm using a new stable Debian Jessie (minimal installation without DE and standard utilities). First of all, I set 'enabled' for Intel virtualisation in BIOS and installed qemu-kvm as usual: # ...
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1k views

Converting .vhd file to .raw - File is too small and does not boot

I have a Hyper-v .vhd file I am trying to convert to .raw for Proxmox. However every time I convert the size is less than half of the actual disk space used and when I import it doesn't boot. I ...
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794 views

(virt-manager:4796): Client failed to connect to the D-BUS daemon / Unable to connect to libvirt

I would like to boot and run Windows 8 with kvm or xen while I'm running Debian Wheezy. Actually I have installed Windows 8 on the external USB disk and Debian Wheezy on the hard disk sata. I'm tryng ...
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30 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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2k views

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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395 views

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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222 views

Creating a Virtual filesystem to boot linux

I am trying to boot the linux kernel (bzImage) in QEMU but have had issues. After asking on U&L I found out that my problem was that I was booting the kernel without a filesystem to boot from. So ...
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454 views

Cannot install Debian on QEmu-arm

I'm trying to run Debian 6 network install with this command: sudo qemu-system-arm -M versatilepb -kernel ./vmlinuz-2.6.32-5-versatile -initrd ./initrd.gz -hda ./debianlxde.img -m 256 -append "root=/...
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1answer
318 views

Emulating RPi using QEMU

I am trying to use QEMU to emulate an RPI running the buster lite raspbian. The command I use is: qemu-system-arm -kernel ~/qemu_vms/kernel-qemu-4.19.50-buster -cpu arm1176 -m 256 -M versatilepb -...
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1k 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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14 views

Can I use KVM in a VM running by QEMU?

I'm running a ARM64 Linux VM. Is it possible to use KVM (or Xen) inside that VM?
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8 views

QEMU boot finding and correctly reading /boot but not finding system partition

I have a QEMU VM built from a VirtualBox vdi file converted to qcow2. I have added this to a new virtual machine through QEMU Virtual Machine Manager and set the boot device to the first partition of ...
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qemu newbie: vm startup stopped at 'booting from hard disk'

I have successfully started an Arch install but now want to import a previous VirtualBox VM into kvm through qemu. The ported system is vdi->qcow2 for the boot disk. I can mount the qcow2 to ...

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