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Allow specifying initial page metadata when allocating

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This commit is contained in:
Zhang Junyang
2024-07-23 02:59:44 +00:00
committed by Tate, Hongliang Tian
parent 077a9ac3ab
commit 819e8dacd5
8 changed files with 73 additions and 31 deletions
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10
ostd/src/mm/page_table/node.rs
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@ -231,14 +231,8 @@ where
/// set the lock bit for performance as it is exclusive and unlocking is an
/// extra unnecessary expensive operation.
pub(super) fn alloc(level: PagingLevel) -> Self {
let page = page::allocator::alloc_single::<PageTablePageMeta<E, C>>().unwrap();
// The lock is initialized as held.
page.meta().lock.store(1, Ordering::Relaxed);
// SAFETY: here the page exclusively owned by the newly created handle.
let inner = unsafe { &mut *page.meta().inner.get() };
inner.level = level;
let meta = PageTablePageMeta::new_locked(level);
let page = page::allocator::alloc_single::<PageTablePageMeta<E, C>>(meta).unwrap();
// Zero out the page table node.
let ptr = paddr_to_vaddr(page.paddr()) as *mut u8;