CONFIG_ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS:

General informations

The Linux kernel configuration item CONFIG_ARCH_SUPPORTS_MSEAL_SYSTEM_MAPPINGS:

• prompt:
• type: bool
• depends on: (none)
• defined in init/Kconfig
• found in Linux kernels: 6.15-rc+HEAD

Help text

Control MSEAL_SYSTEM_MAPPINGS access based on architecture.

A 64-bit kernel is required for the memory sealing feature. No specific hardware features from the CPU are needed.

To enable this feature, the architecture needs to update their special mappings calls to include the sealing flag and confirm that it doesn't unmap/remap system mappings during the life time of the process. The existence of this flag for an architecture implies that it does not require the remapping of the system mappings during process lifetime, so sealing these mappings is safe from a kernel perspective.

After the architecture enables this, a distribution can set MSEAL_SYSTEM_MAPPING to manage access to the feature.

For complete descriptions of memory sealing, please see Documentation/userspace-api/mseal.rst

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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