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libkernel: paging: implement block-level hole punching - #324
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If the end_address() of one of the regions takes us beyond usize::MAX then this function always returns true due to overflow. Use end_address_inclusive() instead which won't overflow the address space.
…ges() The address of the next page was computed prior to a bounds check. If the next page address (which didn't need to be computed) overflowed, it could cause a panic on debug builds.
Add unit tests for the intersection() function. Furthermore, fix a bug where the intersection() function would overflow when computing the interscetion at the address space maximum.
Allow pages to be punched out of block-level mappings, ensuring that page-demotion happens correctly. Also make the TLB invalidation API richer so that more targeted TLB invalidations can be invoked.
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Allow pages to be punched out of block-level mappings, ensuring that page-demotion happens correctly. Also make the TLB invalidation API richer so that more targeted TLB invalidations can be invoked.