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

learn more… | top users | synonyms

0
votes
1answer
207 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 ...
0
votes
1answer
107 views

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 ...
0
votes
2answers
49 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, ...
0
votes
0answers
41 views

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 ...
3
votes
1answer
3k 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 ...
1
vote
0answers
99 views

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 ...
1
vote
0answers
130 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 ...
1
vote
0answers
179 views

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 ...
3
votes
2answers
192 views

Debian 8 install in QEMU/KVM guest failing due to ext4-fs / “read only filesystem” errors

I am on Debian 8.2 and trying to install a Debian 8.2 QEMU/KVM guest. I created a virtual disk image file and booted into the Debian installer ISO with the following commands: jesse@deb:~/vms$ qemu-...
0
votes
2answers
88 views

Bridged interfaces do not have internet access

I'm trying to run a QEMU VM but it doesn't have an internet access, only access to the host and a Docker network. What I did: Created a bridge with: brctl addbr virbr0; Turned it on: ip link set up ...
0
votes
0answers
56 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.
0
votes
0answers
40 views

linux kernel-4.3 and sda disk image

I have cross compiled the linux kernel-4.3 for arm and created ext2 disk image. I have copied the rootfs into disk image. I have tested the disk image with cross compiled kernel version 2.6.33.2 on ...
2
votes
1answer
191 views

How to run a gui client os in a virtual machine on non gui linux host?

Is it possible to run a windows gui client in a virtual machine hosted in a non gui linux? How to set this up? and how to connect to such a machine?
0
votes
1answer
175 views

KVM - nat or bridge. How I do that

I have Debian Jessie server, and I have install apache server. From apache hosted several sites from different ip address. My server have resources for KVM. My question is - How I can set my free IP ...
0
votes
1answer
143 views

HOWTO: Fix “Cannot parse sensitivity level in s0” error when attempting to start a KVM VM after a major OS upgrade

I have a Lenovo ThinkPad T430 running Red Hat Enterprise Linux 6.7 with kernel 2.6.32-573.8.1.el6.x86_64. This is a work computer and my corporate policy states that I must keep my operating system up ...
2
votes
0answers
885 views

Why can't the kernel run init?

I've downloaded the Raspbian image on this page. I'm trying to compile a kernel that can be used to boot the image within qemu. I downloaded the Linux kernel source from kernel.org and ran: make ...
2
votes
2answers
731 views

Making /dev/net/tun available to qemu?

I have created a tap device (tap0) which I would like to provide as a network interface to qemu. I created the device with the following command and attached it to a network bridge I set up: tunctl -...
1
vote
1answer
145 views

Encrypt partition and allow qemu to use it as the guest drive

I am trying to encrypt a 25gb partition on my SSD with cryptsetup in such a way that will allow QEMU-KVM to use it as the guests drive. I have tried luksformatting the drive: cryptsetup luksFormat /...
2
votes
0answers
103 views

Problems with overall ceph performance with QEMU

I am experiencing some performance problems with my QEMU KVMs on my ceph cluster. The cluster has 4 nodes with 4x1TB drives each, 48/64GB RAM, Intel Xeon and AMD Opterons. They are interconnected by ...
0
votes
1answer
233 views

qemu with kvm guest OS is slow

I am trying to create a Windows 7 virtual machine on a Gentoo x86_64 host (kernel 3.18.9 hardened) using qemu-system-x86_64 2.3.0 with kvm enabled. I have successfully compiled the kernel and have ...
0
votes
1answer
41 views

qemu command to start an iso and include a file.img as hard drive

i'm currently using debian jessie , and i can't find qemu launcher in its repositories . however i wanted to know how to start or boot an iso image and inclure a raw file (file.img ; created ...
1
vote
0answers
22 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. ...
1
vote
0answers
33 views

ISC DHCP Server - Qemu system

I've been trying to get dhcp address by an ISC Server. I have one DHCP Server and one qemu server with multiple image tiny core. Hopefully this ascii drawing illustrates the topology: Over the qemu ...
2
votes
1answer
219 views

Virtfs (Plan 9) vs NFS as tool for share folder for virtual machine

I have QEMU virtual machine. Linux host and linux guest. I want stable and fast solution with minimal performance cost. I'm considering two technologies for shared folders (between guest and host): ...
1
vote
1answer
135 views

Virtualisation: follow symbolic links in VirtFS (9p) share

I have folder on host machine which have symlinks to another device. Like this $ ls -all ~/folder_to_share ... file1 file2 linked_dir -> /mnt/bdrive/real_dir/ ... I setup QEMU virtual machine ...
0
votes
0answers
78 views

Pre-built Linux kernel with CONFIG_AEABI for Raspberry Pi emulation in qemu

I'm trying to run a RaspberryPi emulation on QEMU following the instructions from: http://cubik-tech.blogspot.com/2013/02/raspberry-pi-emulation-on-windows.html (and many similar posts) But I'm ...
1
vote
1answer
58 views

Disk space in windows not representing actual qcow2 image size

The disk space shown in Windows running in KVM does not represent the actual disk space available for the qcow2 disk image. The Windows Management Console shows there is 100 GB for the drive, but ...
6
votes
2answers
1k views

logging and debugging for qemu virtual machines

I had a qemu virtual-machine which crashed several times because HDD in hypervisor had no space left. This made me wonder is there a possibility to to set up a logging/debugging for quemu virtual-...
2
votes
1answer
58 views

Qemu - debug new syscall

as a school project I have to add a syscall to the latest stable linux kernel. I did and recompiled the kernel using make defconfig and make. After going through several tutorials to boot the kernel (...
1
vote
1answer
946 views

Libvirt: how to pass qemu command line args?

I have the current libvirt 1.2.20 i want to pass to my machine create with virt-manager some qemu flags. I edited the file and add </devices> <qemu:commandline> <qemu:arg ...
3
votes
0answers
39 views

Use case for qemu-static for same architecture

I just discovered that the 64bit amd version of the Ubuntu package qemu-user-static contains the binary /usr/bin/qemu-x86_64-static. Normally, qemu-user-static is used for emulating another ...
1
vote
1answer
951 views

not syncing: Attempted to kill init! in custom kernel for qemu

I have been working on building a linux kernel for qemu. I have been following the tutorial http://xecdesign.com/compiling-a-kernel/ As of now i have been able to boot the kernel until start of init ...
0
votes
1answer
130 views

Unreliable QEMU guest agent responses

I have a script for automatic backups of my KVMs. Before taking a LVM snapshot I'm trying to freeze the filesystems of the KVM with the QEMU guest agent. It works good most of the time but randomly I ...
0
votes
1answer
102 views

Qemu - substitute the init process

I have a couple of questions concerning qemu boot options 1) When using the following argument init=/bin/sh It works - but is really the init-process replaced by a sh-process? Qemu-system-x86_64 ...
0
votes
0answers
42 views

spice-client full window

installing spice-client gives me 3 client options for connecting to qemu machines: spicec (small and ~perfect test-program but shift-F12 release cursor won't work) spicy (more useful options but can ...
2
votes
2answers
1k views

Are there any benefits of using .qcow2 over .img and which is recommended for making a VM? [closed]

Are there any benefits of using .qcow2 over .img files when trying to create a VM . I have a smallish debian .iso and have seen at least with .qcow2 that it is slow. I also saw http://wiki.qemu....
1
vote
0answers
118 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 ...
0
votes
1answer
127 views

QEMU guest agent problems - hosts and guests in different versions

We have multiple hosts with multiple KVMs each. Some hosts run with Ubuntu 12.04 LTS and newer ones with 14.04 LTS. The guests also have different versions like 12.04 LTS and 14.04 LTS. I want to ...
0
votes
2answers
153 views

QEMU Guest Agent for Ubuntu 12.04 LTS

I've been looking for the QEMU Guest Agent for Ubuntu 12.04 LTS. It seems like the Guest Agent is included in the official Repository from Ubuntu 14.04 and up (http://packages.ubuntu.com/trusty/qemu-...
1
vote
3answers
727 views

I want to try out AIX in my pc, can i emulate it or get it to run for a very affordable price?

sorry, i'm to new to AIX. i love unix and i try different kinds. so can it be emulated with QEMU or can i buy an old IBM processor to use it? or some other easy way? thanks
0
votes
1answer
398 views

can't launch android emulator while logged in over vnc?

i have a headless box running bbqlinux that i'm trying to use as an android-studio development box. when i go to launch an .avd in the emulator, i receive this error: Cannot launch AVD in emulator ...
0
votes
0answers
59 views

Running a custom kernel on qemu

I am trying to test some feature of Ubuntu 12.10 server edition with the kernel version 3.5.0. I am running the qemu as qemu-system-x86_64 -m 2G -hda ubuntu.img -kernel linux-3.5/arch/x86/boot/bzImage ...
0
votes
1answer
80 views

ssh over unix pipe or pty device [closed]

Ok, I don't even know how to put this into words. I have a /dev/myDevice which automatically connects to some ssh server when opened. How do I connect to it with ssh? Is this even sane? If it's insane ...
4
votes
2answers
3k views

Running X86 binaries on armv7

I am trying to run a SNBC USB printer on Raspberry Pi2. For that I need to copy the filter binary of the SNBC USB printer to /usr/lib/cups/filter. But the filter binary is compiled using a x86 ...
0
votes
0answers
38 views

Qemu overlay image size limit

I created a qemu ubuntu vm. Now I use overlay images as a quick way of creating vm's "on the fly". But what is the size limit for an overlay image? Is it the size of the "base" image? Or can it grow ...
1
vote
1answer
121 views

How to let Qemu autoselect a listening port for Spice?

I'm switching some VMs from VNC display type to SPICE. VNC display type offers a very handy to= parameter allowing QEMU to automatically use the first free port from a defined range: -display vnc=...
1
vote
1answer
110 views

qemu command line management

I'm interested in qemu, specifically the kvm feature in Linux which is operated through the command line. I see there are a ton of features available for gnome-boxes and libvirt specifically. My ...
0
votes
1answer
638 views

QEMU Aarch64 and networking connections

I just set up an ARM64 image using QEMU and I'm trying to access the internet from within the binary. The host OS(Ubuntu) receives internet from the eth0 interface. I have the tap0 interface set up. I'...
0
votes
1answer
55 views

“ifconfig -a” does not show any interfaces

I just set up a QEMU image with Ubuntu on ARM64 as per the instructions described here. However, ifconfig -a does not seem to show me an eth0 or eth1 interface as I'd expect. Why is that? root@...
1
vote
1answer
356 views

Qemu and AARCH64

I'm trying to setup an ARM64 machine using QEMU. I ended up fetching the kernel and img file from here and here. I reached the above links from here. When I try to run the OS as :- qemu-aarch64 -m ...