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b013c1e1c6
The asm macros used to create the initial ID map and kernel mappings don't support randomly remapping parts of the address space after it has been populated. What we can do, however, given that all block or page mappings are created at the final level, is take a subset of the mapped range and update its attributes or output address. This will permit us to make parts of these page tables read-only, or remap a part of it to cover the device tree. So add a helper that encapsulates this. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Link: https://lore.kernel.org/r/20220624150651.1358849-12-ardb@kernel.org Signed-off-by: Will Deacon <will@kernel.org> |
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