CONFIG_RISCV_ISA_SVPBMT: Svpbmt extension support for supervisor mode page-based memory types

General informations

The Linux kernel configuration item CONFIG_RISCV_ISA_SVPBMT has multiple definitions:

Svpbmt extension support for supervisor mode page-based memory types found in arch/riscv/Kconfig

The configuration item CONFIG_RISCV_ISA_SVPBMT:

• prompt: Svpbmt extension support for supervisor mode page-based memory types
• type: bool
• depends on: ( CONFIG_64BIT && CONFIG_MMU ) && ( CONFIG_RISCV_ALTERNATIVE )
• defined in arch/riscv/Kconfig
• found in Linux kernels: 6.4–6.12, 6.13-rc+HEAD

Help text

Adds support to dynamically detect the presence of the Svpbmt ISA-extension (Supervisor-mode: page-based memory types) and enable its usage.

The memory type for a page contains a combination of attributes that indicate the cacheability, idempotency, and ordering properties for access to that page.

The Svpbmt extension is only available on 64-bit cpus.

If you don't know what to do here, say Y.

SVPBMT extension support found in arch/riscv/Kconfig

The configuration item CONFIG_RISCV_ISA_SVPBMT:

• prompt: SVPBMT extension support
• type: bool
• depends on: ( CONFIG_64BIT && CONFIG_MMU ) && ( CONFIG_RISCV_ALTERNATIVE )
• defined in arch/riscv/Kconfig
• found in Linux kernels: 5.19, 6.0–6.3

Help text

Adds support to dynamically detect the presence of the SVPBMT ISA-extension (Supervisor-mode: page-based memory types) and enable its usage.

The memory type for a page contains a combination of attributes that indicate the cacheability, idempotency, and ordering properties for access to that page.

The SVPBMT extension is only available on 64Bit cpus.

If you don't know what to do here, say Y.

Hardware

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Sources

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The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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