riscv: add ARCH_HAS_SET_DIRECT_MAP support

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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 d253ca0c ("x86/mm/cpa: Add set_direct_map_*()
functions")) Add a similar implementation for RISC-V.

Signed-off-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Zong Li 2020-03-10 00:55:37 +08:00 • committed by Palmer Dabbelt

parent d3ab332a50

commit 395a21ff85

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1

arch/riscv/Kconfig

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3

arch/riscv/include/asm/set_memory.h

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24

arch/riscv/mm/pageattr.c

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