git/linux-cryptodev-2.6
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git synced 2026-04-04 04:37:39 -04:00
Code Issues Packages Projects Releases Wiki Activity

arm64: mm: factor out the address and ptep alignment into a new helper

Browse Source 
Factor out the contpte block's address and ptep alignment into a new
helper, and will be reused in the following patch.

No functional changes.

Link: https://lkml.kernel.org/r/8076d12cb244b2d9e91119b44dc6d5e4ad9c00af.1770645603.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Ryan Roberts <ryan.roberts@arm.com>
Cc: Barry Song <baohua@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Harry Yoo <harry.yoo@oracle.com>
Cc: Jann Horn <jannh@google.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baolin Wang
2026-02-09 22:07:25 +08:00
committed by Andrew Morton
parent 52e054f718
commit 67d59bddfc
1 changed files with 21 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
arch/arm64/mm/contpte.c
View File

@@ -26,6 +26,26 @@ static inline pte_t *contpte_align_down(pte_t *ptep)
return PTR_ALIGN_DOWN(ptep, sizeof(*ptep) * CONT_PTES);
}
static inline pte_t *contpte_align_addr_ptep(unsigned long *start,
unsigned long *end, pte_t *ptep,
unsigned int nr)
{
/*
* Note: caller must ensure these nr PTEs are consecutive (present)
* PTEs that map consecutive pages of the same large folio within a
* single VMA and a single page table.
*/
if (pte_cont(__ptep_get(ptep + nr - 1)))
*end = ALIGN(*end, CONT_PTE_SIZE);
if (pte_cont(__ptep_get(ptep))) {
*start = ALIGN_DOWN(*start, CONT_PTE_SIZE);
ptep = contpte_align_down(ptep);
}
return ptep;
}
static void contpte_try_unfold_partial(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, unsigned int nr)
{
@@ -569,14 +589,7 @@ void contpte_clear_young_dirty_ptes(struct vm_area_struct *vma,
unsigned long start = addr;
unsigned long end = start + nr * PAGE_SIZE;
if (pte_cont(__ptep_get(ptep + nr - 1)))
end = ALIGN(end, CONT_PTE_SIZE);
if (pte_cont(__ptep_get(ptep))) {
start = ALIGN_DOWN(start, CONT_PTE_SIZE);
ptep = contpte_align_down(ptep);
}
ptep = contpte_align_addr_ptep(&start, &end, ptep, nr);
__clear_young_dirty_ptes(vma, start, ptep, (end - start) / PAGE_SIZE, flags);
}
EXPORT_SYMBOL_GPL(contpte_clear_young_dirty_ptes);