#add for xen related config
CONFIG_HVC_XEN_FRONTEND=y
CONFIG_XEN_DEV_EVTCHN=y
CONFIG_XENFS=y
CONFIG_XEN_COMPAT_XENFS=y
CONFIG_XEN_SYS_HYPERVISOR=y
CONFIG_XEN_GNTDEV=y
CONFIG_XEN_GRANT_DEV_A

#From: http://wiki.xenproject.org/wiki/Mainline_Linux_Kernel_Configs#Configuring_the_Kernel_for_domU_Support
#Enable these core options (Processor type and features| Paravirtualized guest support] 
CONFIG_HYPERVISOR_GUEST=y 
CONFIG_PARAVIRT=y
CONFIG_XEN=y
CONFIG_PARAVIRT_GUEST=y
CONFIG_PARAVIRT_SPINLOCKS=y 

#And Xen pv console device support (Device Drivers|Character devices
CONFIG_HVC_DRIVER=y
CONFIG_HVC_XEN=y 

#And Xen disk and network support (Device Drivers|Block devices and Device Drivers|Network device support)
CONFIG_XEN_FBDEV_FRONTEND=y
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_NETDEV_FRONTEND=y 

#And the rest (Device Drivers|Xen driver support)
CONFIG_XEN_PCIDEV_FRONTEND=y
CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y
CONFIG_XEN_FBDEV_FRONTEND=y
CONFIG_XEN_XENBUS_FRONTEND=y
CONFIG_XEN_SAVE_RESTORE=y
CONFIG_XEN_GRANT_DEV_ALLOC=m 
CONFIG_FB_VIRTUAL=y

#And for tmem support:
CONFIG_XEN_TMEM=y
CONFIG_CLEANCACHE=y
CONFIG_FRONTSWAP=y
CONFIG_XEN_SELFBALLOONING=y 

#xxxxwwww, add general virt machine, to be used as a domain U guest
CONFIG_ARCH_VIRT=y

#xxxxwwww. gc moudle give out exception, disable is first
# CONFIG_GCCORE is not set
# CONFIG_GCIOCTL is not set
# CONFIG_GCBV is not set

#xxxxwwww, to make frame buffer working
CONFIG_FRAMEBUFFER_CONSOLE=y