Xeon Phi Coprocessor and Citrix XenServer 6.2

[Victor_Y_]

I am trying to use the Intel Xeon Phi Coprocessor card with a Citrix XenServer 6.2 guest VM (HVM guest) with PCI passthrough.

The following is my setup:

SuperMicro SYS-6037R-72RTF+
Dom0: XenServer release 6.2.0-70446c (xenenterprise) (Kernel 2.6.32.43-0.4.1.xs1.8.0.835.170778xen)
HVM Guest: CentOS 6.5 with stock kernel, Xeon Phi is passed through with the Xen pciback driver.

In this configuration, the VM will not boot. I was trying to follow the https://software.intel.com/en-us/articles/getting-xen-working-for-intelr-xeon-phitm-coprocessor but wasn't able to patch Qemu-Xen as described (https://github.com/xenserver/qemu-xen-4.2). Let me know if you need any additional information.

Any thoughts or advice are greatly appreciated.

[Frances_R_Intel]

I am not a XenServer person (never used it), so I probably can't help but I wonder if giving more details about what you mean by "wasn't able to patch Qemu-Xen" might spark someone to say "Aha! I know what is going on." Also, do you have access to hvmloader/pci.c from the Citrix XenServer release? Does the patch to that file work (or even make sense) with the XenServer from Citrix? Can you tell what the differences are between the open source Xen and the Citrix version? The directions you are trying to follow list a particular version of Xen but the directions were written over a year ago. I don't know if anyone has tried a more recent version. Were you able to set up the configuration as recommended in that paper?

I know, I know - only questions, not answers. But as I say, the answers might spark something in the brain of someone who actually uses Xen.