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Kernel: Make contiguous VM objects use "user physical pages" by default

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If someone specifically wants contiguous memory in the low-physical-
address-for-DMA range ("super pages"), they can use the
allocate_dma_buffer_pages() helper.
This commit is contained in:
Andreas Kling 2022-02-11 12:20:26 +01:00
parent 5ff816abbf
commit 2ff9db0245
3 changed files with 24 additions and 1 deletions
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1
Kernel/Memory/MemoryManager.h
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@ -174,6 +174,7 @@ public:
ErrorOr<NonnullRefPtr<PhysicalPage>> allocate_user_physical_page(ShouldZeroFill = ShouldZeroFill::Yes, bool* did_purge = nullptr);
ErrorOr<NonnullRefPtr<PhysicalPage>> allocate_supervisor_physical_page();
ErrorOr<NonnullRefPtrVector<PhysicalPage>> allocate_contiguous_supervisor_physical_pages(size_t size);
ErrorOr<NonnullRefPtrVector<PhysicalPage>> allocate_contiguous_user_physical_pages(size_t size);
void deallocate_physical_page(PhysicalAddress);
ErrorOr<NonnullOwnPtr<Region>> allocate_contiguous_kernel_region(size_t, StringView name, Region::Access access, Region::Cacheable = Region::Cacheable::Yes);