Security update for Xen (important)

The XEN hypervisor received updates to fix various security issues and
bugs.

The following security issues were fixed:

• CVE-2015-2151: XSA-123: A hypervisor memory corruption due to x86
  emulator flaw.
• CVE-2015-2045: XSA-122: Information leak through version information
  hypercall.
• CVE-2015-2044: XSA-121: Information leak via internal x86 system device
  emulation.
• CVE-2015-2152: XSA-119: HVM qemu was unexpectedly enabling emulated VGA
  graphics backends.
• CVE-2014-3615: Information leakage when guest sets high graphics
  resolution.
• CVE-2015-0361: XSA-116: A xen crash due to use after free on hvm guest
  teardown.
• CVE-2014-9065, CVE-2014-9066: XSA-114: xen: p2m lock starvation.

Also the following bugs were fixed:

• bnc#919098 - XEN blktap device intermittently fails to connect
• bnc#882089 - Windows 2012 R2 fails to boot up with greater than 60 vcpus
• bnc#903680 - Problems with detecting free loop devices on Xen guest
  startup
• bnc#861318 - xentop reports "Found interface vif101.0 but domain 101
  does not exist."
• Update seabios to rel-1.7.3.1 which is the correct version for Xen 4.4
• Enhancement to virsh/libvirtd "send-key" command The xen side small fix.
  (FATE#317240)
• bnc#901488 - Intel ixgbe driver assigns rx/tx queues per core resulting
  in irq problems on servers with a large amount of CPU cores
• bnc#910254 - SLES11 SP3 Xen VT-d igb NIC doesn’t work
• Add domain_migrate_constraints_set API to Xend’s http interface
  (FATE#317239)
• Restore missing fixes from block-dmmd script
• bnc#904255 - XEN boot hangs in early boot on UEFI system
• bsc#912011 - high ping latency after upgrade to latest SLES11SP3 on xen
  Dom0
• Fix missing banner by restoring the figlet program.