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CONFIG_HMM_MIRROR: HMM mirror CPU page table into a device page table

General informations

The Linux kernel configuration item CONFIG_HMM_MIRROR:

Help text

Select HMM_MIRROR if you want to mirror range of the CPU page table of a process into a device page table. Here, mirror means "keep synchronized". Prerequisites: the device must provide the ability to write-protect its page tables (at PAGE_SIZE granularity), and must be able to recover from the resulting potential page faults.

Hardware

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