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mm: properly implement page locking

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Matheus
2026-07-08 01:37:12 -03:00
parent af30088c0d
commit 1512b2f3c6
14 changed files with 123 additions and 45 deletions
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kernel-src/io/iovec.c
+6 -2
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@@ -235,7 +235,7 @@ size_t iovec_iterator_read_from_ringbuffer(iovec_iterator_t *iovec_iterator, rin
return done;
}
int iovec_iterator_next_page(iovec_iterator_t *iovec_iterator, size_t *page_offset, size_t *page_remaining, void **page) {
int iovec_iterator_next_page(iovec_iterator_t *iovec_iterator, size_t *page_offset, size_t *page_remaining, void **page, bool write) {
iovec_iterator_skip(iovec_iterator, 0); // this will skip any zero length entries
void *addr = (void *)((uintptr_t)iovec_iterator->current->addr + iovec_iterator->current_offset);
size_t offset_in_page = ((uintptr_t)addr % PAGE_SIZE);
@@ -246,7 +246,11 @@ int iovec_iterator_next_page(iovec_iterator_t *iovec_iterator, size_t *page_offs
return 0;
}
void *phys = mm_get_physical_address((void *)((uintptr_t)addr - offset_in_page), MM_GET_PHYSICAL_ADDRESS_FLAGS_HOLD | MM_GET_PHYSICAL_ADDRESS_FLAGS_LOCK);
void *phys = mm_get_physical_address((void *)((uintptr_t)addr - offset_in_page),
MM_GET_PHYSICAL_ADDRESS_FLAGS_HOLD |
MM_GET_PHYSICAL_ADDRESS_FLAGS_LOCK |
(write ? MM_GET_PHYSICAL_ADDRESS_FLAGS_LOCK_HINT_WRITE :
MM_GET_PHYSICAL_ADDRESS_FLAGS_LOCK_HINT_READ));
if (phys == NULL)
return EFAULT;