diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-08-02 16:13:37 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-24 16:20:20 -0700 |
| commit | 8b5989f3333717273d02ab87ba8781f72a6783ab (patch) | |
| tree | 86a18cbb7b5e7a2ab7f02fcd42ffae0fcb9fc861 /arch/arm/mm/mmu.c | |
| parent | ac4cfaccedac891d29560ddfb64cb5c1e710e1e1 (diff) | |
arm: implement the new page table range API
Add set_ptes(), update_mmu_cache_range(), flush_dcache_folio() and
flush_icache_pages(). Change the PG_dcache_clear flag from being per-page
to per-folio which makes __dma_page_dev_to_cpu() a bit more exciting.
Also add flush_cache_pages(), even though this isn't used by generic code
(yet?)
[m.szyprowski@samsung.com: fix potential endless loop in __dma_page_dev_to_cpu()]
Link: https://lkml.kernel.org/r/20230809172737.3574190-1-m.szyprowski@samsung.com
[willy@infradead.org: fix folio conversion in __dma_page_dev_to_cpu()]
Link: https://lkml.kernel.org/r/20230823191852.1556561-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20230802151406.3735276-10-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/arm/mm/mmu.c')
| -rw-r--r-- | arch/arm/mm/mmu.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index fdeaee30d167..674ed71573a8 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1789,7 +1789,7 @@ void __init paging_init(const struct machine_desc *mdesc) bootmem_init(); empty_zero_page = virt_to_page(zero_page); - __flush_dcache_page(NULL, empty_zero_page); + __flush_dcache_folio(NULL, page_folio(empty_zero_page)); } void __init early_mm_init(const struct machine_desc *mdesc) @@ -1798,8 +1798,8 @@ void __init early_mm_init(const struct machine_desc *mdesc) early_paging_init(mdesc); } -void set_pte_at(struct mm_struct *mm, unsigned long addr, - pte_t *ptep, pte_t pteval) +void set_ptes(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pteval, unsigned int nr) { unsigned long ext = 0; @@ -1809,5 +1809,11 @@ void set_pte_at(struct mm_struct *mm, unsigned long addr, ext |= PTE_EXT_NG; } - set_pte_ext(ptep, pteval, ext); + for (;;) { + set_pte_ext(ptep, pteval, ext); + if (--nr == 0) + break; + ptep++; + pte_val(pteval) += PAGE_SIZE; + } } |