diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2023-08-02 16:13:41 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-08-24 16:20:21 -0700 |
| commit | 876397837d582ce72f977ac3e635ce74eebcecc9 (patch) | |
| tree | 8ff3ffd26f7f0396484873e81cdc95374c49a44f /arch/ia64/hp | |
| parent | 9ff633944165d11c53c088d9596db3da66e90396 (diff) | |
ia64: implement the new page table range API
Add PFN_PTE_SHIFT, update_mmu_cache_range() and flush_dcache_folio().
Change the PG_arch_1 (aka PG_dcache_clean) flag from being per-page to
per-folio, which makes arch_dma_mark_clean() and mark_clean() a little
more exciting.
[willy@infradead.org: fix folio_size() handling]
Link: https://lkml.kernel.org/r/ZNPlOCe8F+nrzPxr@casper.infradead.org
Link: https://lkml.kernel.org/r/20230802151406.3735276-14-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'arch/ia64/hp')
| -rw-r--r-- | arch/ia64/hp/common/sba_iommu.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c index 8ad6946521d8..c4d477e8bcd4 100644 --- a/arch/ia64/hp/common/sba_iommu.c +++ b/arch/ia64/hp/common/sba_iommu.c @@ -798,22 +798,30 @@ sba_io_pdir_entry(u64 *pdir_ptr, unsigned long vba) #endif #ifdef ENABLE_MARK_CLEAN -/** +/* * Since DMA is i-cache coherent, any (complete) pages that were written via * DMA can be marked as "clean" so that lazy_mmu_prot_update() doesn't have to * flush them when they get mapped into an executable vm-area. */ -static void -mark_clean (void *addr, size_t size) +static void mark_clean(void *addr, size_t size) { - unsigned long pg_addr, end; - - pg_addr = PAGE_ALIGN((unsigned long) addr); - end = (unsigned long) addr + size; - while (pg_addr + PAGE_SIZE <= end) { - struct page *page = virt_to_page((void *)pg_addr); - set_bit(PG_arch_1, &page->flags); - pg_addr += PAGE_SIZE; + struct folio *folio = virt_to_folio(addr); + ssize_t left = size; + size_t offset = offset_in_folio(folio, addr); + + if (offset) { + left -= folio_size(folio) - offset; + if (left <= 0) + return; + folio = folio_next(folio); + } + + while (left >= folio_size(folio)) { + left -= folio_size(folio); + set_bit(PG_arch_1, &folio->flags); + if (!left) + break; + folio = folio_next(folio); } } #endif |