config X86_64
	def_bool y

config X86
	def_bool y
	select ACPI
	select ACPI_LEGACY_TABLES_LOOKUP
	select COMPAT
	select CORE_PARKING
	select HAS_ALTERNATIVE
	select HAS_CPUFREQ
	select HAS_EHCI
	select HAS_EX_TABLE
	select HAS_GDBSX
	select HAS_IOPORTS
	select HAS_KEXEC
	select HAS_MEM_ACCESS
	select HAS_MEM_PAGING
	select HAS_MEM_SHARING
	select HAS_NS16550
	select HAS_PASSTHROUGH
	select HAS_PCI
	select HAS_PDX
	select NUMA
	select VGA

config ARCH_DEFCONFIG
	string
	default "arch/x86/configs/x86_64_defconfig"

menu "Architecture Features"

source "arch/Kconfig"

config PV_LINEAR_PT
       bool "Support for PV linear pagetables"
       default y
       ---help---
         Linear pagetables (also called "recursive pagetables") refers
         to the practice of a guest operating system having pagetable
         entries pointing to other pagetables of the same level (i.e.,
         allowing L2 PTEs to point to other L2 pages).  Some operating
         systems use it as a simple way to consistently map the current
         process's pagetables into its own virtual address space.

         Linux and MiniOS don't use this technique.  NetBSD and Novell
         Netware do; there may be other custom operating systems which
         do.  If you're certain you don't plan on having PV guests
         which use this feature, turning it off can reduce the attack
         surface.

         If unsure, say Y.

config SHADOW_PAGING
        bool "Shadow Paging"
        default y
        ---help---

          Shadow paging is a software alternative to hardware paging support
          (Intel EPT, AMD NPT).

          It is required for:
            * Running HVM guests on hardware lacking hardware paging support
              (First-generation Intel VT-x or AMD SVM).
            * Live migration of PV guests.

          Under a small number of specific workloads, shadow paging may be
          deliberately used as a performance optimisation.

          If unsure, say Y.

config BIGMEM
	bool "big memory support"
	default n
	---help---
	  Allows Xen to support up to 123Tb of memory.

	  This requires enlarging struct page_info as well as shrinking
	  the always accessible direct mapped memory range.

	  If unsure, say N.

config HVM_FEP
	bool "HVM Forced Emulation Prefix support" if EXPERT = "y"
	default DEBUG
	---help---

	  Compiles in a feature that allows HVM guest to arbitrarily
	  exercise the instruction emulator.

	  This feature can only be enabled during boot time with
	  appropriate hypervisor command line option. Please read
	  hypervisor command line documentation before trying to use
	  this feature.

	  This is strictly for testing purposes, and not appropriate
	  for use in production.

	  If unsure, say N.

config TBOOT
	def_bool y
	prompt "Xen tboot support" if EXPERT = "y"
	depends on X86
	select CRYPTO
	---help---
	  Allows support for Trusted Boot using the Intel(R) Trusted Execution
	  Technology (TXT)

	  If unsure, say Y.
endmenu

source "common/Kconfig"

source "drivers/Kconfig"
