CONFIG_HARDEN_BRANCH_HISTORY: Harden Spectre style attacks against branch history

General informations

The Linux kernel configuration item CONFIG_HARDEN_BRANCH_HISTORY:

• prompt: Harden Spectre style attacks against branch history
• type: bool
• depends on: ( CONFIG_EXPERT ) && ( CONFIG_CPU_SPECTRE )
• defined in arch/arm/mm/Kconfig
• found in Linux kernels: 5.17–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

Speculation attacks against some high-performance processors can make use of branch history to influence future speculation. When taking an exception, a sequence of branches overwrites the branch history, or branch history is invalidated.

Hardware

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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