linux/arch/x86/xen/Kconfig

#
# This Kconfig describes xen options
#

config XEN
	bool "Xen guest support"
	select PARAVIRT
	select PARAVIRT_CLOCK
	depends on X86_64 || (X86_32 && X86_PAE && !(X86_VISWS || X86_VOYAGER))
	depends on X86_CMPXCHG && X86_TSC
	help
	  This is the Linux Xen port.  Enabling this will allow the
	  kernel to boot in a paravirtualized environment under the
	  Xen hypervisor.

config XEN_MAX_DOMAIN_MEMORY
       int "Maximum allowed size of a domain in gigabytes"
       default 8 if X86_32
       default 32 if X86_64
       depends on XEN
       help
         The pseudo-physical to machine address array is sized
         according to the maximum possible memory size of a Xen
         domain.  This array uses 1 page per gigabyte, so there's no
         need to be too stingy here.