CONFIG_PAGE_TABLE_ISOLATION: Remove the kernel mapping in user mode

General informations

The Linux kernel configuration item CONFIG_PAGE_TABLE_ISOLATION has multiple definitions:

Remove the kernel mapping in user mode found in arch/x86/Kconfig

The configuration item CONFIG_PAGE_TABLE_ISOLATION:

• prompt: Remove the kernel mapping in user mode
• type: bool
• depends on: ( CONFIG_X86_64 || CONFIG_X86_PAE )
• defined in arch/x86/Kconfig
• found in Linux kernels: 5.19, 6.0–6.8

Help text

This feature reduces the number of hardware side channels by ensuring that the majority of kernel addresses are not mapped into userspace.

See Documentation/arch/x86/pti.rst for more details.

Remove the kernel mapping in user mode found in security/Kconfig

The configuration item CONFIG_PAGE_TABLE_ISOLATION:

• prompt: Remove the kernel mapping in user mode
• type: bool
• depends on: ( CONFIG_X86_64 || CONFIG_X86_PAE ) && ! CONFIG_UML
• defined in security/Kconfig
• found in Linux kernels: 4.15–4.20, 5.0–5.18, 5.19-rc+HEAD

Help text

This feature reduces the number of hardware side channels by ensuring that the majority of kernel addresses are not mapped into userspace.

See Documentation/x86/pti.rst for more details.

Hardware

LKDDb

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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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