riscv: Support huge pfnmaps

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Use RSW0 as the special bit for pmds and puds, just like for ptes.
Also define the {pte,pmd,pud}_pgprot helpers which were previously
missing and are needed for the follow_pfnmap APIs.

Signed-off-by: Andrew Bresticker <abrestic@rivosinc.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20250108135700.2614848-1-abrestic@rivosinc.com
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>

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Andrew Bresticker 2025-01-08 05:57:00 -08:00 • committed by Alexandre Ghiti

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1

arch/riscv/Kconfig

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49

arch/riscv/include/asm/pgtable.h

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