kvm-guest-drivers-windows
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kvm-guest-drivers-windows | dokany | |
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32 | 14 | |
1,826 | 5,060 | |
4.1% | 1.2% | |
9.0 | 8.1 | |
7 days ago | about 1 month ago | |
C | C | |
BSD 3-clause "New" or "Revised" License | - |
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kvm-guest-drivers-windows
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Why are Apple Silicon VMs so different?
There's mature VirtIO drivers for just about everything already, under the virtio-win umbrella: https://github.com/virtio-win/kvm-guest-drivers-windows
My desktop PC is using libvirt+qemu (on an Arch host. I use Arch, btw) to PCI passthru my RTX 4090 GPU to a Windows guest. I installed the guest initially with emulated SATA for the main drive. Once Windows was up and running, I installed virtio-win and the guest is now using virtIO accelerated drivers for the network interface, main disk. I'm also sharing some filesystems using virtio-fs.
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Help with my setup
So, I started configuring the PC with ubuntu desktop (since I need a GUI for my use case). Then I setup a windows KVM with this. In my use case, I want the windows VM to be always connected to a VPN (Mullvad) that has the toggle of LAN connections turned on. This is because I want to use sunshine on the KVM to stream my desktop to a firestick. This is how I have been configuring one PC till now for my family to be able to watch TV. The issue is that I cannot use sunshine or parsec cos there are no encoders in the VM, thus the performance sucks. (I could use software encoders, but I would use too much CPU for windows VM, which would make me unable to run a LLM (this was my plan) )
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VirGL
Note also: it just got an experimental Windows driver!
[1]https://github.com/virtio-win/kvm-guest-drivers-windows/pull...
- [viogpu3d] Virtio GPU 3D acceleration for windows by max8rr8 · Pull Request #943 · virtio-win/kvm-guest-drivers-windows
- Virtio GPU 3D acceleration for windows
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Libvirt/virtio: Limited resolution on Windows guests
virtio-GPU for Windows for now is just a basic display driver, without any kind of acceleration, so there shouldn't be any difference between using it and QXL, which is fully emulated and in it, if necessary, you can increase the VRAM to be able to use high resolutions, as explained here. Note: this link is just from a quick search, I tried this for myself some time ago but my intention was not to increase the resolution but just to find out if it was possible to have some kind of 3D acceleration, as it happens in VirtualBox, but is not possible yet.
- I Have passed through my gpu to windows VM in proxmox but not getting output via hdmi
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Why is the virt-manager display so slow?
The only sorta-responsive display tech I've found is Virt with GL (3D) enabled. And if your physical box has 4k video you can forget about going anywhere near full screen with that guest VM.
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Virtiofs slower than Samba file sharing?
I suggest you open a new issue in the repository describing this, or search if there is one open reporting the same. Also, keep in mind that as an early stage it might be a good idea to avoid copying important files using this, you could end up losing data unless you do an integrity check (recently I tried installing a game on the VM in a host directory and it didn't work. I'm thinking of an alternative or going back to using VirtualBox, since the shared folders worked very well for this purpose).
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Windows Server 2019 - vioscsi Warning (129) - locking up data drive
The problem was really bad with latest virtio drivers, so I downgraded to version 204, as per: https://github.com/virtio-win/kvm-guest-drivers-windows/issues/623
dokany
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Projected File System
It's not really the same though. A Projected File System copies the files from the backing store to somewhere on the local file system when requested and then performs IO normally on the local files.
For an actual implementation of userspace filesystems on Windows see dokany: https://github.com/dokan-dev/dokany
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Tutorial fo unlimited backup solution in these trying times with Backblaze, Raidrive and Dokany
Now that you are inside the Mirror folder with cmd, let’s start the Mirror function to attach a NAS or cloud folder as a local disk in order to get recognized by the BB client and be backed up. Write something like (read the dokany documentation for more details here): mirror.exe /r x:\ /l m , where x:\ should be the letter of the folder attached with Raidrive and m:\ the letter you want to assign to the new local disk.
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Ask HN: What are some good resources for learning about low level disk/file IO?
I lead a project that included shipping a filesystem driver and a virtual disk on Windows.
What I did to learn the lower-level APIs, and perform initial testing on the driver, was write a "mirror" drive. The user-mode code pointed to a folder on disk, the driver made a virtual disk drive, and all reads and writes in the virtual disk drive went to the mirror folder.
On Windows, you can implement something like that using Dokany, Dokan, or Winfsp. On linux, there's the Fuse API. On Mac, there's MacFUSE.
Even if you don't do a "mirror" drive, understanding the callbacks that libraries like Dokany, Dokan, Winfsp, and Fuse do helps you understand how IO happens in the driver. Many IO methods provided in popular languages provide abstractions above what the OS does. (For example, the Windows kernel has no concept of the "Stream" that's in your C# program. The "Stream"'s Position property is purely a construct within the .Net framework.)
https://dokan-dev.github.io/
https://github.com/dokan-dev/dokany
https://osxfuse.github.io/
Another place to start is the OS's documentation itself. For example, you can start with Window's CreateFileA function. This typically is what gets called "under the hood" in most programming languages when you open or create a file: https://learn.microsoft.com/en-us/windows/win32/api/fileapi/...
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Add USB connected phone as video source
You'll need this ressource installed in 1.X version to make it work : https://github.com/dokan-dev/dokany
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Cheapest Way to Backup 40TB to Backblaze
Potentially no need to buy any hardware https://github.com/dokan-dev/dokany/wiki/Use-Mirror-example
- using back blaze personal? backing up nas?
- Error when trying to unlock any vault
- User mode file system library for windows with FUSE Wrapper
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Cryptomator and Windows 11 - Experiences?
Yeah, I had an issue and had to downgrade the Dokan Library. I downloaded from here.
- ceph-dokan mount issues. Looking for the right place to ask questions.
What are some alternatives?
quickemu - Quickly create and run optimised Windows, macOS and Linux desktop virtual machines.
winfsp - Windows File System Proxy - FUSE for Windows
vgpu_unlock - Unlock vGPU functionality for consumer grade GPUs.
Cryptomator - Multi-platform transparent client-side encryption of your files in the cloud
LookingGlass - An extremely low latency KVMFR (KVM FrameRelay) implementation for guests with VGA PCI Passthrough.
reactos - A free Windows-compatible Operating System
qemu-pinning - My QEMU fork with pinning (affinity) support and a few tweaks.
fuse-overlayfs - FUSE implementation for overlayfs
swtpm - Libtpms-based TPM emulator with socket, character device, and Linux CUSE interface.
ifuse - A fuse filesystem to access the contents of iOS devices
virtualbox-org-svn-vbox-trunk - *UNOFFICIAL* mirror of the repository at http://www.virtualbox.org/svn/vbox/trunk (the first 30569 commits are courtesy of https://gitorious.org/virtualbox/mainlinemirror); Please **DO NOT** open pull requests against this repo
udmabuf - User space mappable dma buffer device driver for Linux.