CONFIG_KERNEL_NOBP: Enable modified branch prediction for the kernel by default

General informations

The Linux kernel configuration item CONFIG_KERNEL_NOBP:

• prompt: Enable modified branch prediction for the kernel by default
• type: bool
• depends on: (none)
• defined in arch/s390/Kconfig
• found in Linux kernels: 4.16–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

If this option is selected the kernel will switch to a modified branch prediction mode if the firmware interface is available. The modified branch prediction mode improves the behaviour in regard to speculative execution.

With the option enabled the kernel parameter "nobp=0" or "nospec" can be used to run the kernel in the normal branch prediction mode.

With the option disabled the modified branch prediction mode is enabled with the "nobp=1" kernel parameter.

If unsure, say N.

Hardware

LKDDb

Raw data from LKDDb:

• (none)

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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