Incoming and outgoing traffic can be shaped independently. Hardware continues to change with virtualization. This does not cause problems with guest operating systems in their default configuration, as jumbo frames need to be explicitly enabled. You should be able to get this setup right with most reasonably modern systems that meet the above requirements, but in the interests of full disclosure, here are my system stats: Interface takes the highest priority, portgroup is lowest priority.
The NAT attachment is the slowest and safest of all attachment types as it provides network address translation. Valid channel names include maindisplayinputscursorplaybackrecord all since 0. The default ioport is 0x Ports are numbered starting from 0.
Neither of these approaches fully satisfied me. With dual-booting, the other OS on your system is a full reboot away. So at best you tend to spend a few weeks in Windows, a few weeks in Linux, and at worst you forget about one of the OSes entirely. Virtualising Ubuntu on a Windows improved on that by allowing the use of both operating systems simultaneously: I could put full-screen the Ubuntu VM on one of my monitors and use Windows programs on the other with only the occasional Ctrl-Alt breaking the flow.
But could never get sound to work on my Ubuntu VMs and I would often accidentally make the storage too small and have to go through the chore of extending vmdk s. And while I enjoy plenty of Windows-only games and programs, I vastly prefer the heavily configurable and less opaque Linux way for doing everything outside of running those games and programs.
GPU passthrough seemed like exactly what I needed. Once I was sure that everything worked a much quicker process than anticipated I replaced that Windows install with a Windows VM and went full passthrough.
Fallout 4 below, screenfetch above, Synergy in control. Much of the guide to follow is paraphrased from other sources, to which links have been provided. Parts 1 and 2 detail getting passthrough and your VM setup, and are largely similar to the most popular guides already extant.
Part 3 is a bit rarer: GPU passthrough and VAC: Global Offensive servers as ofbut it could potentially become an issue for other VAC-protected games in the future. If not, put it off till your next upgrade.
But what hardware specifically? You should be able to get this setup right with most reasonably modern systems that meet the above requirements, but in the interests of full disclosure, here are my system stats:. Notably, the card he used for passthrough does not support UEFI boot, which was a bit of a stumbling block, but not ultimately a showstopper.
Then we can start following this tutorial paraphrased and in some places outright copied below. Run this command with sudo:. The first one is my integrated Intel graphics, the card I want to use for host graphics, and the second is my R9the card I want to pass through to the VM. So I isolate the R9 with the following command:.
Take a note of those IDs in the square brackets: For our purposes, an IOMMU group is an indivisible unit: Often, as in my case, this will present no issues, but sometimes you might have more devices in a particular group than you want to pass through.
Solutions for dealing with that are dealt with here. The next step is to tell the OS to catch it with the pci-stub drivers on boot so it will be free to attach to the VM. If you have an Nvidia card, check out Part 4 of that tutorial I linked to above. See the Bibliography section at the bottom of this post for more resources. Which will actually load the much discussed pci-stub driver kernel module shocking!
There are two ways you can set up your VM. The first thing to do is install the various Qemu- and KVM-related packages necessary to create and run KVM virtual machines. Microsoft provides Windows 10 ISOs for download on this page.
Lastly, grab either the latest or the stable build of the Windows VirtIO drivers to enjoy the sweet, sweet speed of paravirtualised network and disk device drivers in your VM:. You should be doing this with a system that has at least 16GB of RAM. Under my setup, I give my VM 8GB of RAM: Now you need to figure out how many hugepages to assign.
Would you call yourself a fan of GUIs or of scripts? I followed this guide. Setting up a Windows VM with the virtman GUI is mostly a simple process of following instructions and clicking Forward. This is the one thing you need to dip out of the friendly GUI for. Reboot your PC after making this edit and before attempting to boot your VM. You can always remove them later. Finally, add your Windows ISO and VirtIO ISO as virtual CD ROM drives, and then boot and get to installing.
Using SeaBIOS instead of UEFI: Never fear, you can set up a VM to use it. Doing this gives you finer control over your VM than the virtman GUI and maybe gives you extra coolness points? Anyway, this is the approach taken by this guide and the venerable Arch wiki.
The great thing about doing this with a script is you can add extra steps to set up all the comforts discussed in part 3 for sound, controls, and so on. Boot your VM and follow the installation procedure through the SPICE interface. This should be pretty straight-forward. Use the SPICE interface to download and install the appropriate drivers for your graphics card. Following a reboot, you should start to see video output from your passthrough devices.
When I initially set this up in MayI used a Windows 10 ISO from around its public release in July Due to some issue with a Windows update to Intel CPU microcode, this Windows install stalled at build and got into a nasty Windows Update loop, in which it would:. A hideous cycle, like a very boring version of Memento.
To break the cycle, it was necessary to perform a clean boot of Windows, after changing the CPU to a Core2Duo.
You may have trouble syncing the time with that of your host system. Despite setting Windows to get time and timezone information from the internet, my VM would consistently set itself back two hours on every restart. Continue to the next section for some advice on actually using this crazy new setup. While parts one and two were mostly about just following the right tutorials and thus mostly consisted of my summaries and paraphrasingthis part is going to contain information I had to work a bit harder for.
To go back to your host, press Ctrl-Alt like you would with VMWare Player. A physical KVM switch: If you like buying physical hardware, you can get a KVM switch to plug your keyboard and mouse into, and basically toggle a physical switch to change between controlling your host and your VM. Two sets of keyboards and mice: I imagine this would get very annoying.
Synergy keyboard and mouse sharing software: This was a no-brainer for me. I have both of my monitors wired to both graphics cards, and Synergy is configured to place the Windows VM above the Linux host.
So to switch devices, I just move my mouse up or down and toggle the input on the relevant monitor. Setting up Synergy is pretty straightforward: There are just two important, non-obvious points you have to be aware of. In order to play these games, you need to do two things:. The visual effects of the default Windows UAC settings will interfere with Synergy. The solution is to slightly reduce UAC to make the popup less dramatic. Search for User Account Control in the Start menu and change this:.
As an aside, GPU passthrough is probably not a great thing to set up on systems where security is of a very high priority. Most security benefits of virtualisation are cancelled out once you start passing physical hardware through directly.
The easiest way to get sound working in your VM is just to leave a SPICE window open on the host. Disable the SPICE graphics display if you want. The hardest, but probably most elegant way, is to set up KVM to pass sound from your VM to your host, i. I fiddled with this for a while before giving up and going with option one. If you get this working, let me know how you did it.
Then you can connect this share as a Network Drive on Windows, using yourusername: I share my entire extra storage HDD drive in this way. If you have any idea, let me know. Most of them have been linked above as well. About Archive Features Fiction Games Misc davidyat. You should be able to get this setup right with most reasonably modern systems that meet the above requirements, but in the interests of full disclosure, here are my system stats: AMD Sapphire Radeon R93GB DDR5 CPU: Intel Core i 3.
AMD Sapphire Radeon HD Host Graphics: Nvidia PoV BV G92 GeForce GT CPU: Intel Core iK Motherboard: ASUS XM WS Notably, the card he used for passthrough does not support UEFI boot, which was a bit of a stumbling block, but not ultimately a showstopper. Due to some issue with a Windows update to Intel CPU microcode, this Windows install stalled at build and got into a nasty Windows Update loop, in which it would: Download new updates Restart to install updates Fail to install updates Revert to a pre-update status GOTO 1 A hideous cycle, like a very boring version of Memento.
GPU passthrough: gaming on Windows on Linux
If this is omitted, and attribute cpuset of element vcpu is not specified, "emulator" is pinned to all the physical CPUs by default. Prior to libvirt 3. Use of this mode is only possible on networks: Each queue will potentially be handled by a different processor, resulting in much higher throughput. About Archive Features Fiction Games Misc davidyat. It has two attributes, the type specifies the hypervisor used for running the domain.
The values of these attributes can be given in decimal, hexadecimal starting with 0x or octal starting with 0 form. Starting with version 3. I have both of my monitors wired to both graphics cards, and Synergy is configured to place the Windows VM above the Linux host. This is similar to how USB mass storage devices are built to follow the USB mass-storage device class specification and work with all computers, with no per-device drivers needed.
A clear key can be protected by encrypting it under a unique wrapping key that is generated for each guest VM running on the host. Xen provides paravirtualized device drivers, and VMware provides what are called Guest Tools.
PCI devices are limited by the virtualized system architecture. The subelement driver can be used to tune the virtio options of the device: These are configurable items that 1 are visible to the guest OS so must be preserved for guest ABI compatibility, and 2 are usually left to default values or derived automatically by libvirt. It will be seen as memballoon element.
The source for the Windows drivers is hosted in a repository on GIT hub. The container is permitted to exceed its soft limits for a grace period of time. This also means that you cannot run the same service on the same ports on the host.
Virtio - KVM
On Linux hosts, functionality is limited when using wireless interfaces for bridged networking. This allows the VM to be re-configured for the first post-install bootup. Moreover, some firmwares may implement the Secure boot feature.
Interface takes the highest priority, portgroup is lowest priority. Additionally, Redpill Linpro AS generously provides the hardware and network connectivity required. The filesystem format will be autodetected. To go back to your host, press Ctrl-Alt like you would with VMWare Player. However, like a physical router, VirtualBox can make selected services available to the world outside the guest through port forwarding.
UDP Tunnel This can be used to interconnect virtual machines running on different hosts directly, easily and transparently, over existing network infrastructure. Finally, select desired host interface from the list at the bottom of the page, which contains the physical network interfaces of your systems.
Attribute nodeset specifies the NUMA nodes, using the same syntax as attribute cpuset of element vcpu. See the README in this repo for some more details about how the RPM and repo are built: This backend connects to a source using the EGD protocol. Configuring port forwarding with NAT. A hub is a device that expands a single port into several so that there are more ports available to connect devices to a host system. Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest.
Using KVM virtio Drivers for Existing Devices There are a number of different ways to boot virtual machines each with their own pros and cons.
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