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Questions tagged [qemu]

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

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Pass through ACPI devices in KVM

Is there a way to pass through ACPI devices to a KVM guest? I'm trying to create a debugging environment for an ACPI device.
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19 views

Run the i386 environment on the aarch64 [on hold]

My problem is that I want to run an i386 or x86 environment on the aarch64 environment. Is this possible? Especially as there are programs that do this, for example ExaGear Windows Emulator, which ...
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Resizing a bootable partition getting error with cfdisk in Arch Linux

I am using Arch Linux in QEMU and have extra space on the disk but the partition where everything has been installed is now full as 3G’s did not get me so far so I am trying to add 5GB to it but when ...
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1answer
16 views

qemu - Scrollback in the monitor console

How can I scroll back in the monitor (compat_monitor0) in SDL and GTK views? I somewhere found it can be done with Ctrl+PgUp, but that does not work.
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How to update OpenGL on QEMU/RedHat QXL

I'm using Windows 7 guest on Fedora 29 host, and QEMU/KVM. My hardware does not support VT-d, however it supports VT-x, and I found that Windows guest works best with QXL video driver. When I'm ...
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1answer
34 views

Arch linux not booting in QEMU

I am using QEMU to install arch linux on a 5G raw img disk and everytime and install it and reboot it boots back into arch but when i close qemu and try boot back into arch i am not prompted with the ...
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1answer
24 views

QeMU breaking after GCC upgrade

I've been developing for PowerPC systems for a while now and until recently have been relying on GCC 6.3, without problems. Currently, due to different reasons, I had to switch from GCC 6.3 to GCC 8....
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28 views

How to boot a physical Linux partition with Qemu for Windows 10 X64 bit?

I have Debian Linux and Windows 10 installed alongside on my first hard drive. I want to start my Debian install from within Windows through Qemu and the Hax hypervisor. This is how is partitioned my ...
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14 views

Nested virtualization - x86_64 host and Arm guest

I am running a Linux-Arm virtual machine (type 2) from my Linux-x86_64 host, and I am trying to figure out whether there is any way to enable type 1 virtualization on the guest-Linux-Arm machine. I'...
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140 views

qemu + hax accelerator does not work to boot and run Debian on Windows 10

I tried to start QEMU with -accel hax to boot and run Debian on Windows 10,but it didn't work. This is what happened : C:\Programmi\qemu\qemu-system-x86_64 -m 3072 -cpu Haswell,vendor=GenuineIntel,+...
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Having trouble building xv6 using QEMU

I followed all the instructions on the following page. And I installed QEMU and set the prefix to /usr/local on my machine. I downloaded the xv6-public package into my /home directory. And I went to ...
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In Debian Using Android TV x86 Emulator Image with QEMU/KVM

If I am correct, Android Emulator uses KVM/QEMU for virtualization. Since there is no standalone Android TV x86 installer floating around I need to use these images to create myself a virtual Android ...
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43 views

qemu guest serial output to console of host

I have been searching for a solution for some time now and where I have found several threads that seem to have helped other people, those solutions do not seem to work for me. I would like to start a ...
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20 views

QEMU crashed while trying to boot up i.MX6q device kernel

When tried to boot up Kernel uImage of an i.MX6q based embedded device, it seems that QEMU crashes with "Unable to handle kernel NULL pointer dereference at virtual address 00000044". Before crashing ...
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105 views

custom memory allocation vtable not supported trying to use qemu

I have a poweredgeT420 server and have been testing with qemu for virtualization. I have been following some documentation and simply tried using the quick start guide from qemu quick start guide ...
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1answer
54 views

ArchLinux on a virtual Hard Drive - Will creating a desktop install on my real computer or the virtual one? [closed]

I have this command for powershell on windows to run arch Linux in QEMU: .\qemu-system-x86_64 -boot d -cdrom E:\archlinux.iso -m 3G -hda linuxMint.img -drive format=raw,file=E:\Data It loads up ...
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1answer
18 views

libvirt - can only boot from IDE devices?

I'm running Ubuntu 18.04 as host and windows 10 as guest, using QEMU/KVM as my hypervisor and libvirt as my management tool. I have a nvme ssd /dev/nvmewin that I want to pass to the windows guest (...
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28 views

Is possible emulate a freebsd with architecture arm64 in docker?

After search in google i found the debootstrap used to emulate any architecture including arm64 in debian, is possible emulate the raspbian too (os for raspberry). This is a video with the "how-to-do"...
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29 views

How to trace the register values of executed instructions in QEMU?

I can get the disassembled instructions with: qemu-system-aarch64 -d in_asm Sample format: ---------------- IN: 0xfffffff0: ea 5b e0 00 f0 ljmpw $0xf000:$0xe05b ---------------- IN: ...
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45 views

Can QEMU boot Linux from vmlinux instead of bzImage?

I've been using QEMU 3.0.0 happily with -kernel bzImage from Linux v4.19. However, now I have another simulator (gem5) that boots from vmlinux, it would be convenient if I could boot both from the ...
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2answers
62 views

Windows 10 VM Bootloop

I've replaced my intel i5 with an amd ryzen 7. Now my Windows 10 VM (libvirt/qemu) won't boot, it just shows "preparing automatic repair" and then reboots. I cannot boot from a rescue iso either. I ...
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132 views

How to redirect QEMU -serial output to both a file and the terminal or a port?

I would like to be able to both interact with the system via the command line, but also get the output to a file at the same time. If I do: qemu-sysem-x86_64 -serial stdio |& tee file then it ...
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1answer
78 views

What's the `dynamips`, `iol` and `qemu`?

In my a virtual appliance, under the path, there are dynamips, iol, and qemu: I want to know what's them, and the difference between them.
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1answer
146 views

QEMU User mode emulation

I am a student and trying to compile QEMU on MINGW32 in user emulation mode. I read in certain document that, the following OS are supported in user space emulation: 1. Linux (referred as qemu-...
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207 views

No DHCP Reply on bridge with QEMU and TAP interface

I have a host machine running a virtual machine with QEMU and i want the DHCP server on the host providing an IP address to it. I am using static ethernet addresses for the guests, so i start them up ...
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1answer
51 views

tap-bridge-tap : No LACP

I have two switches connected via TAP interfaces. Each Virtual Switch port is connected to an individual TAP port and the TAP ports are joined via a Bridge. SW1-port1 = TAP 11 <== BR121 ==> TAP ...
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15 views

Can't I acess /dev/nbdX(qemu device) via iSCSI?

I know if I create logical volume, it must be ok to read/write via iSCSI. But I wanna try acess qemu nbd device. I create a qcow2 and mount on /dev/nbd0, and fdisk /dev/nbd0 -l shows: Disk /dev/nbd0:...
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1answer
73 views

Windows XP crashes on startup when using Qemu

I installed a Windows XP image on my USB flash drive formatted as NTFS. It's for my Raspberry Pi 3. When I tried to install it on my Raspberry Pi, the installation hanged every single time. So I ...
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0answers
48 views

How to disable buffering for a LVM partition under QEMU KVM

I'm using Windows 10 under QEMU KVM on a Fedora 27 box. Disk for a VM is attached as a raw LVM partition with cache=none. <disk type='block' device='disk' > <driver name='qemu' type='raw'...
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1answer
158 views

Strategy for File System Permissions On KVM Shared Folder

I have a Ubuntu/KVM hypervisor environment that has access (via NFS) to ZFS data sets (aka file systems). I have been hosting the VM images on a ZFS file system which, although not the fastest thing ...
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1answer
734 views

What are the differences between sound devices in qemu shown by virt-manager?

I am trying to use qemu/kvm via virt-managet. I want to use Windows 10 guest in a Linux host. When I add sound device, there are several models to choose from: ac97 es1370 ich6 ich9 pcspk sb16 How ...
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1answer
576 views

Unable to build QEMU 2.12 with WHPX (Windows Hypervisor Platform) enabled

[If this is in the wrong StackExchange feel free to redirect me.] I've been interested in using QEMU for a while but also wish to use Hyper-V for Docker on Windows. I discovered that the new WHPX ...
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1answer
51 views

Is it possible to treat a thread as a core in QEMU?

When using a multi-threaded CPU, is it possible to treat a thread as a core to have double the available cores to the guest OS?
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172 views

QEMU launch vm with NIC/LAN bridge for PXE/IPXE boot

I'm using QEmu (2018.04.04) in Windows 10 64 bits I'm trying to launch a VM to boot from a TFTP/PXE server in the network so it must acquire IP from the DHCP/TFTP server and get the PXE payload As ...
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1answer
39 views

qemu-nbd not creating partions

I was using qemu-nbd to mount .vdi virtual machine harddrives. However, qemu-nbd suddenly* stopped working. My usual workflow was # modprobe --verbose nbd insmod /lib/modules/4.4.0-127-generic/...
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1answer
33 views

linux git corruption on qemu guest shutdown

I run ubuntu on qemu virtual box with this command: "D:\Program Files\qemu\qemu-system-x86_64.exe" -hda myimage.img -nographic -enable-kvm -accel hax -enable-hax -m 1G -net user,hostfwd=tcp::22-:22 -...
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166 views

KVM passthrough on Dell R720xd

sorry for my english. I can't setup gpu passthrough on Dell R720xd (have working R510 & ubuntu 16.04) I have: debian 9.4 qemu version: 2.8.1 libvirt version: 3.0.0 virt-manager 1.4.0 ...
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67 views

How to map an address of a guest OS to host OS

Given a guest OS address on a virtual machine, how can I map it to host OS and vice versa. I am running a guest OS (Ubuntu 16.04) using QEMU emulator (version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.26)) ...
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118 views

Alpine Linux running under Qemu - set nameserver manually when using DHCP

I am running Alpine 3.7 under Qemu on a Chromebook and using DHCP to set the IP address etc. The nameserver (as set in /etc/resolv.conf) is not correct (it's a 10. address presumably because of the ...
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214 views

Which CPU is being emulated by Qemu by default?

I'm currently running a VM without selecting a CPU type. How can I know which one is being emulated? Is there a way to ask this to the Qemu monitor? Edit: Host machine is Windows 10 and guest is Plan ...
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168 views

run ubuntu on windows without vt-x - very slow

I want to run docker on a machine that does not support vt-x. Since the only solution to that would be to change machines, I installed qemu and am installed lubuntu 12 i386. However, everything is ...
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123 views

virt-install ListActivatableNames Connection is Closed

I'm trying to use virt-install to easily set up a vm. Silly me. The endgame here is to have roughly ten of these bad boys running that all have to be able to communicate with one another via ssh, ...
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1answer
475 views

qemu -enable-kvm *slower* than pure emulation for x86_64

Running qemu-system-x86_64 -enable-kvm -cpu host -smp cores=4 hosted on an Intel Xeon/Core-2 (newgen, Family=6) or better machine (total number of cores on guest=24, total ram=196gb), and the guest ...
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1answer
1k views

How to set up NAT for Qemu with TAP backend? (Windows 10)

I want to use the TAP network backend instead of the default SLIRP that Qemu provides. This is the batch file I use to create the VM (inspired by this): @echo off set "QEMUIMG=D:\user\VMs\Qemu\qemu\...
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1answer
48 views

Running containers on top of QEMU

I have a testing setup I'm trying to migrate to using VMs rather than bare metal as much as possible. The existing setup is structured to run everything within containers (LXC, specifically), and it ...
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1answer
450 views

Qemu share folder - 9pnet_virtio: no channels available for device

I try to run a qemu virtual machine having a folder shared with host. No matter what I do, I have always the same error: 9pnet_virtio: no channels available for device share. Host machine is under ...
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0answers
751 views

How to set up Internet access for QEMU?

I followed many tutorials online for days and still could not set up internet access for QEMU. I followed this tutorial, but it did not work either. Basically the steps are, (copied) The simplest ...
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1answer
1k views

How to emulate ARM64 programs in Windows X64 with Qemu?

I've downloaded the Windows ARM64 ISO from https://uup.rg-adguard.net/ and open it with Qemu as in this article. But Qemu is so slow to emulate the whole Windows ARM64 OS (I know emulation << ...
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38 views

Configure Debian Sparc64 on Qemu to get apt commands via SSH on guest

From this link, I have been able to do ssh from a Debian Sparc64 guest Qemu on a MacOS High Sierra host. Now, I try to configure guest and host in order to use "apt-get install" on the Debian Sparc64 ...
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1answer
1k views

Use virt-manager on windows with cygwin

I current am trying to connect to a hyper visor server with virt-manager on a windows computer. The host is currently setup to run only as a TTY base server. And from my research, I've only read to ...