From: Anshuman Khandual Date: Wed, 22 Oct 2025 03:29:51 +0000 (+0100) Subject: mm/debug_vm_pgtable: add [pte|pmd]_mkwrite_novma() tests X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=eca1fba23344ef6e289548bddd59127734873264;p=thirdparty%2Fkernel%2Flinux.git mm/debug_vm_pgtable: add [pte|pmd]_mkwrite_novma() tests Add some [pte|pmd]_mkwrite_novma() relevant tests. [anshuman.khandual@arm.com: add a new test combination per Huang Ying] Link: https://lkml.kernel.org/r/20251024013137.136926-1-anshuman.khandual@arm.com Link: https://lkml.kernel.org/r/20251022032951.3498553-1-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual Suggested-by: Catalin Marinas Reviewed-by: Catalin Marinas Reviewed-by: Huang Ying Acked-by: David Hildenbrand Signed-off-by: Andrew Morton --- diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c index 830107b6dd086..133543ca28219 100644 --- a/mm/debug_vm_pgtable.c +++ b/mm/debug_vm_pgtable.c @@ -102,6 +102,12 @@ static void __init pte_basic_tests(struct pgtable_debug_args *args, int idx) WARN_ON(pte_write(pte_wrprotect(pte_mkwrite(pte, args->vma)))); WARN_ON(pte_dirty(pte_wrprotect(pte_mkclean(pte)))); WARN_ON(!pte_dirty(pte_wrprotect(pte_mkdirty(pte)))); + + WARN_ON(!pte_dirty(pte_mkwrite_novma(pte_mkdirty(pte)))); + WARN_ON(pte_dirty(pte_mkwrite_novma(pte_mkclean(pte)))); + WARN_ON(!pte_write(pte_mkdirty(pte_mkwrite_novma(pte)))); + WARN_ON(!pte_write(pte_mkwrite_novma(pte_wrprotect(pte)))); + WARN_ON(pte_write(pte_wrprotect(pte_mkwrite_novma(pte)))); } static void __init pte_advanced_tests(struct pgtable_debug_args *args) @@ -195,6 +201,13 @@ static void __init pmd_basic_tests(struct pgtable_debug_args *args, int idx) WARN_ON(pmd_write(pmd_wrprotect(pmd_mkwrite(pmd, args->vma)))); WARN_ON(pmd_dirty(pmd_wrprotect(pmd_mkclean(pmd)))); WARN_ON(!pmd_dirty(pmd_wrprotect(pmd_mkdirty(pmd)))); + + WARN_ON(!pmd_dirty(pmd_mkwrite_novma(pmd_mkdirty(pmd)))); + WARN_ON(pmd_dirty(pmd_mkwrite_novma(pmd_mkclean(pmd)))); + WARN_ON(!pmd_write(pmd_mkdirty(pmd_mkwrite_novma(pmd)))); + WARN_ON(!pmd_write(pmd_mkwrite_novma(pmd_wrprotect(pmd)))); + WARN_ON(pmd_write(pmd_wrprotect(pmd_mkwrite_novma(pmd)))); + /* * A huge page does not point to next level page table * entry. Hence this must qualify as pmd_bad().