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CONFIG_RISCV_ISA_ZAWRS: Zawrs extension support for more efficient busy waiting

General informations

The Linux kernel configuration item CONFIG_RISCV_ISA_ZAWRS:

Help text

The Zawrs extension defines instructions to be used in polling loops which allow a hart to enter a low-power state or to trap to the hypervisor while waiting on a store to a memory location. Enable the use of these instructions in the kernel when the Zawrs extension is detected at boot.

Hardware

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