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CONFIG_HAVE_SMP: System Supports SMP (MX)

General informations

The Linux kernel configuration item CONFIG_HAVE_SMP has multiple definitions:

found in arch/arm/Kconfig

The configuration item CONFIG_HAVE_SMP:

Help text

This option should be selected by machines which have an SMP- capable CPU.

The only effect of this option is to make the SMP-related options available to the user for configuration.

System Supports SMP (MX) found in arch/xtensa/Kconfig

The configuration item CONFIG_HAVE_SMP:

Help text

This option is use to indicate that the system-on-a-chip (SOC) supports Multiprocessing. Multiprocessor support implemented above the CPU core definition and currently needs to be selected manually.

Multiprocessor support in implemented with external cache and interrupt controllers.

The MX interrupt distributer adds Interprocessor Interrupts and causes the IRQ numbers to be increased by 4 for devices like the open cores ethernet driver and the serial interface.

You still have to select "Enable SMP" to enable SMP on this SOC.

Hardware

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