:orphan:

.. title:: X86_MFENCE_INSTRUCTION_SUPPORTED

.. option:: CONFIG_X86_MFENCE_INSTRUCTION_SUPPORTED

*X86 MFENCE instruction supported*

Type: ``bool``

Help
====

.. code-block:: none

    Set n to disable the use of MFENCE instruction in arch_dcache_flush()
    for X86 CPUs have CLFLUSH instruction but no MFENCE

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

\ :option:`CACHE_MANAGEMENT <CONFIG_CACHE_MANAGEMENT>` && !\ :option:`X86_64 <CONFIG_X86_64>` && \ :option:`X86 <CONFIG_X86>`

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

Default
=======

- y

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



At ``<Zephyr Architecture>/x86/core/Kconfig.ia32:173``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:29`` → ``<Zephyr Architecture>/Kconfig:12`` → ``<Zephyr Architecture>/x86/Kconfig:483``

Menu path: (Top) → X86 Architecture Options

.. code-block:: kconfig

    config X86_MFENCE_INSTRUCTION_SUPPORTED
    	bool "X86 MFENCE instruction supported"
    	default y
    	depends on CACHE_MANAGEMENT && !X86_64 && X86
    	help
    	  Set n to disable the use of MFENCE instruction in arch_dcache_flush()
    	  for X86 CPUs have CLFLUSH instruction but no MFENCE

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