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

[Jason Long <hack3rcon@xxxxxxxxx>]

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_TIMEOUT=5
> GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
> GRUB_DEFAULT=saved
> GRUB_DISABLE_SUBMENU=true
> GRUB_TERMINAL_OUTPUT="console"
> GRUB_CMDLINE_LINUX="rd.lvm.lv=fedora/root00 rd.lvm.lv=fedora/swap rhgb
> quiet xen-pciback.hide=(01:00.0)"
> GRUB_DISABLE_RECOVERY="true"
>
> 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:
http://ark.intel.com/products/52214/Intel-Core-i7-2600K-Processor-8M-Cache-up-to-3_80-GHz

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

ist.

The point is that Intel normally deactivates VT-d for the -k-versions.
If you compare it to the i7-2600
(http://ark.intel.com/de/products/52213/Intel-Core-i7-2600-Processor-8M-Cache-up-to-3_80-GHz),
you see that this CPU would support it.

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


Cheers
CRT

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