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Re: [Xen-users] VGA PASSTHROUGH not working :(

Oops. My Motherboard is :

Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: Z68XP-UD3R

It is so odd that Corei7 Can't support it.

Processor Information
Socket Designation: Socket 1155
Type: Central Processor
Family: Other
Manufacturer: Intel
ID: A7 06 02 00 FF FB EB BF
Version: Intel(R) Core(TM) i7-2600K CPU
Voltage: 1.0 V
External Clock: 100 MHz
Max Speed: 4000 MHz
Current Speed: 3500 MHz
Status: Populated, Enabled
Upgrade: Socket 478
L1 Cache Handle: 0x000A
L2 Cache Handle: 0x000B
L3 Cache Handle: Not Provided
Serial Number:  
Asset Tag:  
Part Number:  

On Friday, May 27, 2016 2:17 PM, Carl Schneider <carl.schneider+mailinglists@xxxxxx> wrote:

On 05/27/2016 11:17 AM, Jason Long wrote:
> My Dom0 is Fedora 23 Server and my "/etc/default/grub" is :
> GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
> GRUB_CMDLINE_LINUX="rd.lvm.lv=fedora/root00 rd.lvm.lv=fedora/swap rhgb
> quiet xen-pciback.hide=(01:00.0)"
> and I added below lines to my Windows vm config file :
> acpi=1
> pci=['01:00.0']
> But
> [root@localhost ~]# xl create /etc/xen/windows.cfg
> Parsing config from /etc/xen/windows.cfg
> libxl: error: libxl_pci.c:1089:libxl__device_pci_add: PCI device
> 0000:01:00.0 cannot be assigned - no IOMMU?
> libxl: error: libxl_create.c:1405:domcreate_attach_pci:
> libxl_device_pci_add failed: -1
> libxl: info: libxl.c:1698:devices_destroy_cb: forked pid 2282 for
> destroy of domain 1
> As you see, I got error.
> # lspci
> 01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce
> 210] (rev a2)

Hi, sorry that I was not able to answer earlier.

You said that your CPU is the i7 2600K and posted this link to the Ark:

It clearly states that it has no VT-d, thus you are not able to activate
the IOMMU because there is no IOMMU. Your steps were all more or less
the correct way to activate it, but your hardware does sadly not support


The point is that Intel normally deactivates VT-d for the -k-versions.
If you compare it to the i7-2600
you see that this CPU would support it.

Please note that your Chipset/Motherboard/BIOS needs to support
VT-d/IOMMU, too.


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