diff options
Diffstat (limited to 'arch/riscv/mm')
| -rw-r--r-- | arch/riscv/mm/cacheflush.c | 4 | ||||
| -rw-r--r-- | arch/riscv/mm/pgtable.c | 20 |
2 files changed, 23 insertions, 1 deletions
diff --git a/arch/riscv/mm/cacheflush.c b/arch/riscv/mm/cacheflush.c index 3cc07ed45aeb..fcd6145fbead 100644 --- a/arch/riscv/mm/cacheflush.c +++ b/arch/riscv/mm/cacheflush.c @@ -90,8 +90,10 @@ void flush_icache_pte(pte_t pte) if (PageHuge(page)) page = compound_head(page); - if (!test_and_set_bit(PG_dcache_clean, &page->flags)) + if (!test_bit(PG_dcache_clean, &page->flags)) { flush_icache_all(); + set_bit(PG_dcache_clean, &page->flags); + } } #endif /* CONFIG_MMU */ diff --git a/arch/riscv/mm/pgtable.c b/arch/riscv/mm/pgtable.c index 6645ead1a7c1..fef4e7328e49 100644 --- a/arch/riscv/mm/pgtable.c +++ b/arch/riscv/mm/pgtable.c @@ -81,3 +81,23 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr) } #endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */ +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +pmd_t pmdp_collapse_flush(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) +{ + pmd_t pmd = pmdp_huge_get_and_clear(vma->vm_mm, address, pmdp); + + VM_BUG_ON(address & ~HPAGE_PMD_MASK); + VM_BUG_ON(pmd_trans_huge(*pmdp)); + /* + * When leaf PTE entries (regular pages) are collapsed into a leaf + * PMD entry (huge page), a valid non-leaf PTE is converted into a + * valid leaf PTE at the level 1 page table. Since the sfence.vma + * forms that specify an address only apply to leaf PTEs, we need a + * global flush here. collapse_huge_page() assumes these flushes are + * eager, so just do the fence here. + */ + flush_tlb_mm(vma->vm_mm); + return pmd; +} +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ |