:orphan:

.. title:: ENABLE_EXTENDED_IBRS

.. option:: CONFIG_ENABLE_EXTENDED_IBRS

*Enable Extended IBRS*

Type: ``bool``

Help
====

This option will enable the Extended Indirect Branch Restricted
Speculation 'always on' feature. This mitigates Indirect Branch
Control vulnerabilities (aka Spectre V2).

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

\ :option:`USERSPACE <CONFIG_USERSPACE>` && \ :option:`X86 <CONFIG_X86>`

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

Default
=======

- y if !\ :option:`X86_NO_SPECTRE_V2 <CONFIG_X86_NO_SPECTRE_V2>`

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

.. highlight:: kconfig

At ``arch/x86/Kconfig:289``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:29`` → ``arch/Kconfig:12``

Menu path: (Top) → X86 Architecture Options

.. parsed-literal::

    config ENABLE_EXTENDED_IBRS
    	bool "Enable Extended IBRS"
    	default y if !\ :option:`X86_NO_SPECTRE_V2 <CONFIG_X86_NO_SPECTRE_V2>`
    	depends on \ :option:`USERSPACE <CONFIG_USERSPACE>` && \ :option:`X86 <CONFIG_X86>`
    	help
    	  This option will enable the Extended Indirect Branch Restricted
    	  Speculation 'always on' feature. This mitigates Indirect Branch
    	  Control vulnerabilities (aka Spectre V2).

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