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riscv: add ARCH_HAS_SET_DIRECT_MAP support
Add set_direct_map_*() functions for setting the direct map alias for the page to its default permissions and to an invalid state that cannot be cached in a TLB. (See d253ca0 ("x86/mm/cpa: Add set_direct_map_*() functions")) Add a similar implementation for RISC-V. Signed-off-by: Zong Li <[email protected]> Signed-off-by: Palmer Dabbelt <[email protected]>
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