This page contains our ideas list and information for students and mentors. Please contact the mentor for the project idea you are interested in. IRC is usually the quickest way to get an answer. Please contact the mentor before applying so we can arrange for an IRC interview and get to know each other.
Students who do not contact the mentor cannot be accepted. This is the listing of suggested project ideas. Students are free to suggest their own projects, too. Summary: QEMU has documentation in several different formats. The goal is to reorganize the documentation to be more consistent and write new tools to help automatically generating documentation. The goal of this project is to write tools and scripts that process this content and generate helpful documentation in HTML or other formats.
Summary: QEMU is a large program and most of the time you do not want to build all of it. The project will provide a simple mechanism to configure QEMU. Configuration of QEMU is currently split between multiple configuration files for guest features and a configure script for host features ; there is no user interface to fill in the configuration files, and no way to express dependencies between features.
If you want to see Kconfig in action, try "make menuconfig" with the Linux kernel source.
It allows the user to enable or disable build components and handles dependencies. Users have come to expect copy-paste between host and guest to work. This is also called clipboard sharing and makes it easier to work with graphical guests. Summary: QEMU devices sweet tasting phlegm a way to serialize their state.
QEMU can serialize state for its devices. This feature is used by migration and save to disk. We want to exercise that state to be sure that we are not missing state when we change device emulation code. Given a tree of the devices, we can randomly choose a device, save its state to a buffer, reset the device state that it has after bootand load the state back every n milliseconds.
If it fails we know:.Save states are 'snapshots' of a game's progress. Save states differ from the save functionality built into most games — because they are produced by the emulator itself, they carry none of the limitations that the game or console may otherwise impose. You can create any number of save states you like, as frequently as you like, and loading them will take you back to precisely where you were in the game when they were taken even in the middle of a battle or cut scene.
You may use a game's built-in save mechanism instead of or in addition to save states, if you like. OpenEmu automatically saves your progress as you play a game, so that you can always pick up where you left off without having to manually save.
The next time you run the game, you will have the option of restarting from the automatic save state or not. If you don't see this, you may have to Reset warnings. The Quick Save State combines the ease of use of the automatic save state with the extra control afforded by manual save states.
To load from an existing save state, right-click a game in the library view and go to the Play Save Games menu. Here you will find all of the save states you've previously created not including OE's automatic save state or the Quick Save State. Click on the desired save to load the game from that point. You may also load a save state via the HUD's disk menu. Within the game window, move the mouse to produce the HUD barand click the floppy disk icon near the centre.
Clicking any of the saves in this menu anything besides Save Current Game will load from the corresponding state. You must be running a game to save its state. Within the game window, move the mouse to produce the HUD bar, and click the floppy disk icon near the center. Inside this menu, you will see a Save Current Game option, as well as if applicable any previously created save states and the Quick Save State see above. To create a new save state, click on Save Current Game.
A dialogue will appear where you can enter a custom name for the save by default it is based on the date and time. You can delete a save state in the Save States collection by right-clicking on the desired state and selecting delete.
Save states are generally limited to the core they were created with — if you change cores, your old save states will no longer work. However, if you try to load from a state saved on a different core, OE will automatically switch back to load it.
Skip to content. User guide: Save states Jump to bottom. Automatic save states OpenEmu automatically saves your progress as you play a game, so that you can always pick up where you left off without having to manually save. Quick Save State The Quick Save State combines the ease of use of the automatic save state with the extra control afforded by manual save states.Virtualization on Linux, Intro to KVM with Virtual Machine Manager
Manual save states OpenEmu also features manual save states, like most other emulators. Loading To load from an existing save state, right-click a game in the library view and go to the Play Save Games menu.The download should start. It may take a while to complete. Note that, the filename being downloaded is virtio-win.
Once the download is complete, move the virtio-win. Then, click on Manage. Now, select the virtio-win Click on Next. The virtio storage driver should be installed. Now, you should see the storage device in the Windows installer.
How to Create KVM Virtual Machine Snapshot with virsh command
Select it and click on Next. Windows installer should start installing Windows on the virtio storage device. It may take a while to complete the Windows installation on the VM. Now, right click mouse on the Windows logo of the start menu and select Device Manager. To install the virtio network driver, right click on Ethernet Controller and select Update driver.
Google Summer of Code 2013
Once the virtio network driver is installed, click on Close. Your VM should now have a working network connection. If you see any other unrecognized devices in the Driver Manager of your Windows VM, you can install drivers for them the same way.
Thanks for reading this article. I was born in Bangladesh. To do that, visit the Official Fedora Virtio Driver download page. Once the page loads, navigate to the Direct downloads section and download the stable virtio-win.
Super User is a question and answer site for computer enthusiasts and power users. It only takes a minute to sign up. I am used to the Virtualbox "save machine state" exit strategy, which is a handy way to let the host reboot without shutting down the vm.
I can handle the commandline startup, but what I haven't been able to do succesfully is to save a VM's state that can be later booted up and resumed. How can I do this? Note that libvirt's virtual machine manager is not an option as I can't seem to install the networking firewall dependencies nor does it seem necessary, so I don't really want to. I'm running Arch Linux. You can use the "savevm" and "loadvm" command in the qemu monitor.
The entire state of the machine is saved, exactly as in virtualbox. The only caveat is that the drive image file has to be in qcow2 format. Sign up to join this community. The best answers are voted up and rise to the top.
Home Questions Tags Users Unanswered. Asked 4 years, 9 months ago. Active 5 months ago. Viewed 5k times. Just to clarify something. I use VirtualBox myself, and VT-x support is there. You just have to enable it per machine and install the guest addons to use it. Also, it will be disabled if you have another VM installed and its drivers are loaded first.
Also, only available on x64 installs. Qemu and VMWare for that matter have a pass-through mechanism. See this Virtualbox bug report. Ah, my bad.
Which one for Linux and Windows 7 guests? Additional drivers are not required. I think the obvious bad thing happens with system time inside the guest. I don't know if there are guest drivers available to let the clock catch up. The Red Hat Virtualization Deployment and Administration Guide has a section on thisbut if you don't have access then it wont be much help In a nutshell, what you are looking for is the virsh dompmsuspend command and option.
The virsh command can do anything you need it to, given the right options and parameters. I am not familiar with 'suspending' a KVM guest, so I can't really give you much guidance, but the documentation should have everything you need. Sign up to join this community. The best answers are voted up and rise to the top.
Home Questions Tags Users Unanswered. Ask Question. Asked 2 years, 11 months ago. Active 8 months ago. Viewed 11k times.
Ned64 Ned64 5, 3 3 gold badges 21 21 silver badges 50 50 bronze badges. I am new to qemu, but doesn't savevm do what you want? Active Oldest Votes. So it has. Thanks very much, had not spotted it. Jiahao Li Jiahao Li 51 1 1 silver badge 1 1 bronze badge. Thanks, this is the command line equivalent of the accepted answer and useful as an addition.
Thanks for the reply! That's what ridgy suggested and sourcejedi detailed in its comment. Used virt-manager for the moment but shall try this out in the beloved command line, as well. Sign up or log in Sign up using Google. Sign up using Facebook.Forums New posts Search forums.
What's new New posts Latest activity. Members Current visitors New profile posts Search profile posts.
Log in. Search Everywhere Threads This forum This thread. Search titles only. Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced…. New posts.
How to Install virtio Drivers on KVM-QEMU Windows Virtual Machines
I've done some test with 2 host and kvm guest using qcow2 over nfs share and everything is going well. I enjoyed migration and snapshots. What is missing to me is something like Virtualbox "save machine state". Save the machine state: With this option, VirtualBox "freezes" the virtual machine by completely saving its state to your local disk. When you start the VM again later, you will find that the VM continues exactly where it was left off.
All your programs will still be open, and your computer resumes operation. Saving the state of a virtual machine is thus in some ways similar to suspending a laptop computer e. Aug 29, 14, I assume you are looking for KVM live snapshots? I hope I explained in an understandable way I find it difficult to translate my thoughts into English.Download and uncompress a hard disk image with Linux installed e.
Some targets do not need a disk image. Select the emulated machine by name. Use -machine help to list available machines. For architectures which aim to support live migration compatibility across releases, each release will introduce a new versioned machine type.
For example, the 2. To allow live migration of guests from QEMU version 2. To allow users live migrating VMs to skip multiple intermediate releases when upgrading, new releases of QEMU will support machine types from many previous versions. This is used to enable an accelerator. Depending on the target architecture, kvm, xen, hax, hvf, whpx or tcg can be available.
By default, tcg is used. If there is more than one accelerator specified, the next one is used if the previous one fails to initialize. Enables or disables memory merge support. This feature, when supported by the host, de-duplicates identical memory pages among VMs instances enabled by default. Enables or disables AES key wrapping support on sccw hosts. The default is on. Enables or disables DEA key wrapping support on sccw hosts.
If enforce-config-section is set to onforce migration code to send configuration section even if the machine-type sets the migration. NOTE: this parameter is deprecated. Please use -global migration.
What is QtEmu?
Controls number of TCG threads. The default is to enable multi-threading where both the back-end and front-ends support it and no incompatible TCG features have been enabled e. For the PC target, the number of cores per die, the number of threads per cores, the number of dies per packages and the total number of sockets can be specified. Missing values will be computed. If any on the three values is given, the total number of CPUs n can be omitted.
Set the NUMA distance from a source node to a destination node. The distance from a node to itself is always If any pair of nodes is given a distance, then all pairs must be given distances. Although, when distances are only given in one direction for each pair of nodes, then the distances in the opposite directions are assumed to be the same. If, however, an asymmetrical pair of distances is given for even one node pair, then all node pairs must be provided distance values for both directions, even when they are symmetrical.
This option defines the file descriptor of which a duplicate is added to fd set. The file descriptor cannot be stdin, stdout, or stderr. In particular, you can use this to set driver properties for devices which are created automatically by the machine model. To create a device which is not created automatically and set properties on it, use - device.
The longhand syntax works even when driver contains a dot.