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[Xen-API] AMD 6274 CPU and Xen XCP 1.5

  • To: xen-api@xxxxxxxxxxxxx
  • From: Michael D'Andrea <mdandrea@xxxxxxxxxxxxxxxxx>
  • Date: Wed, 23 May 2012 10:21:25 -0500
  • Delivery-date: Wed, 23 May 2012 15:21:38 +0000
  • List-id: User and development list for XCP and XAPI <xen-api.lists.xen.org>

Ubuntu 12.04 VM gives error:  ILLEGAL INSTRUCTION running as a host in Xen XCP 1.5.

Seems the issue is with the newer AMD 6200 series processors (CPU's).

We are running AMD 6274 chips, and had to append this "cpuid_mask_cpu=fam_10_rev_c"
to the extlinux.conf file:

label xe
  # XCP
  kernel mboot.c32
  append /boot/xen.gz cpuid_mask_cpu=fam_10_rev_c dom0_mem=752M lowmem_emergency
_pool=1M crashkernel=64M@32M console= vga=mode-0x0311 --- /boot/vmlinuz-2.6-xen
root=LABEL=root-bptvgzah ro xencons=hvc console=hvc0 console=tty0 quiet vga=785
splash --- /boot/initrd-2.6-xen.img

Reducing the instruction set to an older K10 operation architecture fixed the issue.

This now allows Ubuntu 12.04 to function correctly as a VM in Xen XCP 1.5.

So... my question is this... seems Citrix has fixed this issue with the newest release of Xen Server 6.0.2, when will this be included in Xen XCP?  We do NOT use Citrix Xen Server at all, instead, we use Xen XCP 1.5.

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