This patch as originally titled Calpella/Sandybridge IGD
passthrough.  In this revision, I have separated cleanup portion of the
patch from Calpella/Sandybridge portion.  This  cleanup portion
incorporates inputs from Stephano and proposed patch from Isaku.  The main
changes are consolidating graphics passthrough specific code into pt-graphics.c
and removal of hardcoded intercepts for host bridge (device 00:00.0) accesses
in pci.c. 
 
Signed-off-by: Allen Kay [allen.m.kay@xxxxxxxxx]
Signed-off-by: Isaku Yamahata [yamahata@xxxxxxxxxxxxx]
 
---
 hw/pass-through.c |  215
+++++++-----------------------------------------
 hw/pass-through.h |   20 ++++-
 hw/pc.c          
|    4 +
 hw/pci.c         
|   31 +------
 hw/pci.h         
|    6 +-
 hw/piix_pci.c    
|    4 +-
 hw/pt-graphics.c  |  240 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 xen-hooks.mak    
|    2 +-
 8 files changed, 303 insertions(+), 219 deletions(-)
 create mode 100644 hw/pt-graphics.c