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s390: implement the new page table range API

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Add set_ptes() and update_mmu_cache_range().

Link: https://lkml.kernel.org/r/20230802151406.3735276-24-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-08-02 16:13:51 +01:00 committed by Andrew Morton
parent 864609c6a0
commit 843f9310e0
1 changed files with 24 additions and 9 deletions
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33
arch/s390/include/asm/pgtable.h
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@ -47,6 +47,7 @@ static inline void update_page_count(int level, long count)
* tables contain all the necessary information.
*/
#define update_mmu_cache(vma, address, ptep) do { } while (0)
#define update_mmu_cache_range(vmf, vma, addr, ptep, nr) do { } while (0)
#define update_mmu_cache_pmd(vma, address, ptep) do { } while (0)
/*
@ -1316,20 +1317,34 @@ pgprot_t pgprot_writecombine(pgprot_t prot);
pgprot_t pgprot_writethrough(pgprot_t prot);
/*
* Certain architectures need to do special things when PTEs
* within a page table are directly modified. Thus, the following
* hook is made available.
* Set multiple PTEs to consecutive pages with a single call. All PTEs
* are within the same folio, PMD and VMA.
*/
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry)
static inline void set_ptes(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t entry, unsigned int nr)
{
if (pte_present(entry))
entry = clear_pte_bit(entry, __pgprot(_PAGE_UNUSED));
if (mm_has_pgste(mm))
ptep_set_pte_at(mm, addr, ptep, entry);
else
set_pte(ptep, entry);
if (mm_has_pgste(mm)) {
for (;;) {
ptep_set_pte_at(mm, addr, ptep, entry);
if (--nr == 0)
break;
ptep++;
entry = __pte(pte_val(entry) + PAGE_SIZE);
addr += PAGE_SIZE;
}
} else {
for (;;) {
set_pte(ptep, entry);
if (--nr == 0)
break;
ptep++;
entry = __pte(pte_val(entry) + PAGE_SIZE);
}
}
}
#define set_ptes set_ptes
/*
* Conversion functions: convert a page and protection to a page entry,