- Xen Gpl Pv Driver Developers Motherboards Driver Download For Windows 10
- Xen Gpl Pv Driver Developers Motherboards Driver Download For Windows 7
- Xen Gpl Pv Driver Developers Motherboards Driver Download For Windows 8
- Xen Project Guest (DomU) support for Linux was introduced into the Linux kernel with version 2.6.24, whereas Xen Project Control Domain (Dom0) support was added from version 2.6.37. The key drivers have been added to Linux v 3.0 and since additional drivers and optimizations are added.
- Most drivers completely re-written No assumptions or custom hacks Interdependencies removed or controlled No direct function calls Use interfaces Can be separately installed Available on Windows Update Open source Adopted by Xen Project 11 New XenServer PV Drivers 12.
VT-d PCI passthrough is currently broken with the current GPL PV drivers. The 0.8.9 driver behaved differently and didn't block my PCI passthrough device. It should be possible, I'm just not sure what the best approach is at the moment. Agenda “A history of the Windows PV drivers and a brief tour of the ‘upstream’ drivers and their interfaces”. Background. The XenServer 6.0.2 (a.k.a. Legacy) drivers. The XenServer 6.1 (a.k.a. Standard) drivers. Open Source. ‘Upstream’ Drivers. XenServer PV Device. Interfaces. Building and Installing 3. This project has taken the the XenServer Windows PV Drivers, re-written them and contributed them to the Xen Project. The Windows PV Driver Subproject is developing these drivers under Xen Project governance. One of the reasons to do this, is to make the drivers more easily signable and distributable via the Windows driver update mechanism.
Important page: Some parts of page are out-of-date and needs to be reviewed and corrected!
These drivers allow Windows to make use of the network and block backend drivers in Dom0, instead of the virtual PCI devices provided by QEMU. This gives Windows a substantial performance boost, and most of the testing that has been done confirms that. This document refers to the new WDM version of the drivers, not the previous WDF version. Some information may apply though.
I was able to see a network performance improvement of 221mbit/sec to 998mb/sec using iperf to test throughput. Disk IO, testing via crystalmark, improved from 80MB/sec to150MB/sec on 512-byte sequential writes and 180MB/sec read performance.
With the launch of new Xen project pages the main PV driver page on www.xenproject.org keeps a lot of the more current information regarding the paravirtualization drivers.
Supported Xen versions
Gplpv >=0.11.0.213 were tested for a long time on Xen 4.0.x and are working, should also be working on Xen 4.1.
Gplpv >=0.11.0.357 tested and working on Xen 4.2 and Xen 4.3 unstable.
The signed drivers from ejbdigital work great on Xen 4.4.0. If you experience a bluescreen while installing these drivers, or after a rebootafter installing them, please try adding device_model_version = 'qemu-xen-traditional'. I had an existing 2008 R2 x64 system that consitently failed with a BSOD afterthe gpl_pv installation. Switching to the 'qemu-xen-traditional' device model resolved the issue. However, on a clean 2008 R2 x64 system, I did not have to makethis change, so please bear this in mind if you run into trouble.
I do need to de-select 'Copy Network Settings' during a custom install of gpl_pv. Leaving 'Copy network settings' resulted in a BSOD for me in 2008R2 x64.
I run Xen 4.4.0-RELEASE built from source on Debian Jessie amd64.
PV drivers 1.0.1089 tested on windows 7 x64 pro SP1, dom0 Debian Wheezy with xen 4.4 from source and upstream qemu >=1.6.1 <=2.0.
Notes: - upstream qemu version 1.6.0 always and older versions in some cases have critical problem with hvm domUs not related to PV drivers. - if there are domUs disks performance problem using blktap2 disks is not PV drivers problem, remove blktap2 use qdisk of upstream qemu instead for big disks performance increase (mainly in write operations)
Supported Windows versions
In theory the drivers should work on any version of Windows supported by Xen. With their respective installer Windows 2000 and later to Windows 7, 32 and 64-bit, also server versions. Please see the release notes with any version of gpl_pv you may download to ensure compatibility.
I have personally used gpl_pv on Windows 7 Pro x64, Windows Server 2008 x64, Windows Server 2008 R2 x64 and had success.
Recently I gave Windows 10 a try under Xen 4.4.1 (using Debian Jessie). The paravirtualization drivers still work. The drivers have not been installed from scratch but have been kept during the Windows Upgrade from Windows 7 to Windows 10.
Sources are now available from the Xen project master git repository:
In addition you will need the Microsoft tools as described in the README files. The information under 'Xen Windows GplPv/Building' still refers to the old Mercurial source code repository and is probably dated.
New, Signed, GPL_PV drivers are available at what appears to be the new home of GPL_PV athttp://www.ejbdigital.com.au/gplpv
These may be better than anything currently available from meadowcourt or univention.
Older binaries, and latest source code, are available from http://www.meadowcourt.org/downloads/
- There is now one download per platform/architecture, named as follows:
- platform is '2000' for 2000, 'XP' for XP, '2003' for 2003, and 'Vista2008' for Vista/2008/7
- arch is 'x32' for 32 bit and 'x64' for 64 bits
- 'debug' if is build which contains debug info (please use these if you want any assistance in fixing bugs)
- without 'debug' build which contains no debug info
Newer, signed, GPL_PV drivers are available at what appears to be the new home of GPL_PV at http://www.ejbdigital.com.au/gplpv
You can get older, signed, GPLPV drivers from univention.
Signed drivers allow installation on Windows Vista and above (Windows 7, Windows Server 2008, Windows 8, Windows Server 2012) without activating the testsigning.
Installing / Upgrading
Once built (or downloaded for a binary release), the included NSIS installer should take care of everything. See here for more info, including info on bcdedit under Windows 2008 / Vista.
/! Please definitly visit the link above which links to /Installing . It holds information to not crash your Installation. It concerns the use of the /GPLPV boot parameter.
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Previous to 0.9.12-pre9, '/GPLPV' needed to be specified in your boot.ini file to activate the PV drivers. As of 0.9.12-pre9, /NOGPLPV in boot.ini will disable the drivers, as will booting into safe mode. With 'shutdownmon' running, 'xm shutdown' and 'xm reboot' issued from Dom0 should do the right thing too.
In your machine configuration, make sure you don't use the ioemu network driver. Instead, use a line like:
vif = 
Also fixed MAC address can be set,useful to the risk of reactivation of a license for Windows.
This is a list of issues that may affect you, or may not. These are not confirmed issues that will consistently repeat themselves. An issuelisted here should not cause you to not try gpl_pv in a safe environment. Please report both successes and failures to the mailing list, it all helps!
- An OpenSolaris Dom0 is reported not to work, for reasons unknown.
- Checksum offload has been reported to not work correctly in some circumstances.
- Shutdown monitor service in some cases is not added, and must be added manually.
- Network is not working after restore with upstream qemu, workaround for now is set fixed mac address in domUs xl cfg file.
- Installing with 'Copy Network Settings' may result in a blue screen.
- A blue screen may result if you are not using the traditional qemu emulator.
PLEASE TEST YOUR PERFORMANCE USING IPERF AND/OR CRYSTALMARK BEFORE ASSUMING THERE IS A PROBLEM WITH GPL_PV ITSELF
Note: I was using pscp to copy a large file from another machine to a Windows 2008 R2 DomU machine and was routinely only seeing 12-13MB/sec download rate. I consistentlyhad blamed windows and gpl_pv as the cause of this. I was wrong! Testing the network interface with iperf showed a substantial improvement after installing gpl_pv and thedisk IO showed great performance when tested with CrystlMark. I was seeing a bug in pscp itself. Please try to test performance in a multitude of ways before submittinga complaint or bug report.
Using the windows debugger under Xen
Set up Dom0
- Change/add the serial line to your Windows DomU config to say serial='pty'
- Add a line to /etc/services that says 'windbg_domU 4440/tcp'. Change the domU bit to the name of your windows domain.
- Add a line to /etc/inetd.conf that says 'windbg_domU stream tcp nowait root /usr/sbin/tcpd xm console domU'. Change the domU bit to the name of your domain. (if you don't have an inetd.conf then you'll have to figure it out yourself... basically we just need a connection to port 4440 to connect to the console on your DomU)
- Restart inetd.
Set up the machine you will be debugging on - another Windows machine that can connect to your Dom0 from.
- Download the windows debugger from Microsoft and install.
- Download the 'HW Virtual Serial Port' application from HW Group and install. Version 3 appears to be out, but i've only ever used 2.5.8.
Boot your DomU
- xm create DomU (or whatever you normally use to start your DomU)
- Press F8 when you get to the windows text boot menu and select debugging mode, then boot. The system should appear to hang before the splash screen starts
- Start the HW Virtual Serial Port application
- Put the IP address or hostname of your Dom0 in under 'IP Address'
- Put 4440 as the Port
- Select an unused COM port under 'Port Name' (I just use Com8)
- Make sure 'NVT Enable' in the settings tab is unticked
- Save your settings
- Click 'Create COM'. If all goes well it shuold say 'Virtual serial port COM8 created' and 'Connected device <hostname>'
Run the debugger
- Start windbg on your other windows machine
- Select 'Kernel Debug' from the 'File' menu
- Select the COM tab, put 115200 in as the baud rate, and com8 as the port. Leave 'Pipe' and 'Reconnect' unticked
- Click OK
- If all goes well, you should see some activity, and the HWVSP counters should be increasing. If nothing happens, or if the counters start moving and then stop, quit windbg, delete the com port, and start again from 'Start HWVSP'. Not sure why but it doesn't always work the first time.
- The debug output from the PV drivers should fly by. If something isn't working, that will be useful when posting bug reports.
- If you actually want to do some debugging, you'll need to have built the drivers yourself so you have the src and pdb files. In the Symbol path, add '*SRV*c:websymbols*http://msdl.microsoft.com/download/symbols;c:path_to_sourcetargetwinxpi386'. change winxpi386 to whatever version you are debugging.
- Actually using the debugger is beyond the scope of this wiki page :)
- xenpci driver - communicates with Dom0 and implements the xenbus and event channel interfaces
- xenhide driver - disables the QEMU PCI ATA and network devices when the PV devices are active
- xenvbd driver - block device driver
- xennet driver - network interface driver
- xenstub driver - provides a dummy driver for vfb and console devices enumerated by xenpci so that they don't keep asking for drivers to be provided.
A driver domain is unprivileged Xen domain that has been given responsibility for a particular piece of hardware. It runs a minimal kernel with only that hardware driver and the backend driver for that device class. Thus, if the hardware driver fails, the other domains (including Dom0) will survive and, when the driver domain is restarted, will be able to use the hardware again.
As disk driver domains are not currently supported, this page will describe the setup for network driver domains.
This will eliminate dom0 as a bottleneck. All device backend in dom0 will result dom0 to have bad response latency.
- Enhanced reliability
Hardware drivers are the most failure-prone part of an operating system. It would be good for safety if you could isolate a driver from the rest of the system so that, when it failed, it could just be restarted without affecting the rest of the machine.
- Enhanced security
Because of the nature of network protocols and routing, there is a higher risk of an exploitable bug existing somewhere in the network path (host driver, bridging, filtering, &c). Putting this in a separate, unprivileged domain limits the value of attacking the network stack: even if they succeed, they have no more access than a normal unprivileged VM.
Having a system with a modern IOMMU (either AMD or VT-d version 2) is highly recommended. Without IOMMU support, there's nothing to stop the driver domain from using the network card's DMA engine to read and write any system memory. Furthermore, without IOMMU support, you cannot pass through a device to an HVM guest, only PV guests.
If you don't have IOMMU support, you can still use PV domains to get the performance benefit, but you won't get any security or stability benefits.
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Setting up the driver domain is fairly straightforward, and can be broken down into the following steps:
Set up a VM with the appropriate drivers
These drivers include the hardware driver for the NIC, as well as drivers to access xenbus, xenstore, and netback. Any Linux distro with dom0 Xen support should do. The author recommends
xen-tools (also see xen-tools).
You should also give the VM a descriptive name; 'domnet' would be a sensible default.
Install the xen-related hotplug scripts
These are scripts that listen for vif creation events on xenstore, and respond by doing the necessary setup with netback.
The easiest way to do this is by installing the full set of xen toolsin the VM -- either by installing the xen-utils package, or running'make install-tools' inside the VM.
Use PCI passthrough to give the VM access to the hardware NIC
This has a lot of steps, but is fairly straightforward. Details for doing so can be found here: Xen PCI Passthrough
Set up network topology in the VM
This is identical to the setup you would do in domain 0. Normally this would be bridging, but NAT or openvswitch are other possibilities. See more information at Host_Configuration/Networking.
You now have a fully-configured driver domain. To use it, simply add 'backend=[domain-name]' to the vifspec of your guest vif; for example:
- AMD I/O Virtualization Technology (IOMMU) Specification.
- Intel Virtualization Technology for Directed I/O.