:orphan:

.. title:: CONFIG_X86_MAX_ADDITIONAL_MEM_DOMAINS

.. kconfig:: CONFIG_X86_MAX_ADDITIONAL_MEM_DOMAINS

CONFIG_X86_MAX_ADDITIONAL_MEM_DOMAINS
#####################################

*Maximum number of memory domains*

Type: ``int``

Help
====

.. code-block:: none

    The initial page tables at boot are pre-allocated, and used for the
    default memory domain. Instantiation of additional memory domains
    if common page tables are in use requires a pool of free pinned
    memory pages for constructing page tables.

    Zephyr test cases assume 3 additional domains can be instantiated.

Direct dependencies
===================

\ :kconfig:`X86_MMU <CONFIG_X86_MMU>` && \ :kconfig:`USERSPACE <CONFIG_USERSPACE>` && !\ :kconfig:`X86_COMMON_PAGE_TABLE <CONFIG_X86_COMMON_PAGE_TABLE>` && \ :kconfig:`X86 <CONFIG_X86>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- 3

Kconfig definition
==================



At ``<Architecture>/x86/Kconfig:358``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:39`` → ``<Architecture>/Kconfig:12``

Menu path: (Top) → X86 Architecture Options

.. code-block:: kconfig

    config X86_MAX_ADDITIONAL_MEM_DOMAINS
    	int "Maximum number of memory domains"
    	default 3
    	depends on X86_MMU && USERSPACE && !X86_COMMON_PAGE_TABLE && X86
    	help
    	  The initial page tables at boot are pre-allocated, and used for the
    	  default memory domain. Instantiation of additional memory domains
    	  if common page tables are in use requires a pool of free pinned
    	  memory pages for constructing page tables.
	  
    	  Zephyr test cases assume 3 additional domains can be instantiated.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*