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Kernel: Remove "supervisor" bit from PhysicalPage

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Instead of each PhysicalPage knowing whether it comes from the
supervisor pages or from the user pages, we can just check in both
sets when freeing a page.

It's just a handful of pointer range checks, nothing expensive.
This commit is contained in:
Andreas Kling 2021-07-11 23:12:32 +02:00
parent ac78f1e812
commit c2792212f4
9 changed files with 39 additions and 53 deletions
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3
Kernel/VM/MemoryManager.h
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@ -145,8 +145,7 @@ public:
RefPtr<PhysicalPage> allocate_user_physical_page(ShouldZeroFill = ShouldZeroFill::Yes, bool* did_purge = nullptr);
RefPtr<PhysicalPage> allocate_supervisor_physical_page();
NonnullRefPtrVector<PhysicalPage> allocate_contiguous_supervisor_physical_pages(size_t size, size_t physical_alignment = PAGE_SIZE);
void deallocate_user_physical_page(PhysicalAddress);
void deallocate_supervisor_physical_page(PhysicalAddress);
void deallocate_physical_page(PhysicalAddress);
OwnPtr<Region> allocate_contiguous_kernel_region(size_t, StringView name, Region::Access access, size_t physical_alignment = PAGE_SIZE, Region::Cacheable = Region::Cacheable::Yes);
OwnPtr<Region> allocate_kernel_region(size_t, StringView name, Region::Access access, AllocationStrategy strategy = AllocationStrategy::Reserve, Region::Cacheable = Region::Cacheable::Yes);