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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:

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:

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

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