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shmobj: Support large page

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Mixing page sizes is allowed by shmobj.

Change-Id: Ic48b71da2db6ce3f68fa3dbc8ad5ae96347d6018
Refs: #1381
Refs: #1458
This commit is contained in:
Ken Sato
2020-01-15 15:45:17 +09:00
committed by Masamichi Takagi
parent 4b66373813
commit 9a60997ea0
32 changed files with 2212 additions and 75 deletions
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28
arch/arm64/kernel/include/arch-memory.h
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@@ -778,32 +778,8 @@ static inline pte_t *get_contiguous_tail(pte_t *__ptep, size_t __pgsize)
return (pte_t *)__page_align_up(__ptep + 1, align) - 1;
}
static inline int split_contiguous_pages(pte_t *ptep, size_t pgsize)
{
int ret;
pte_t *head = get_contiguous_head(ptep, pgsize);
pte_t *tail = get_contiguous_tail(ptep, pgsize);
pte_t *ptr;
uintptr_t phys;
struct page *page;
phys = pte_get_phys(head);
page = phys_to_page(phys);
if (page && (page_is_in_memobj(page)
|| page_is_multi_mapped(page))) {
ret = -EINVAL;
goto out;
}
for (ptr = head; ptr <= tail; ptr++) {
*ptr &= ~PTE_CONT;
}
ret = 0;
out:
return ret;
}
int split_contiguous_pages(pte_t *ptep, size_t pgsize,
uint32_t memobj_flags);
static inline int page_is_contiguous_head(pte_t *ptep, size_t pgsize)
{