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mm/debug_vm_pgtable: add [pte|pmd]_mkwrite_novma() tests

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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 <anshuman.khandual@arm.com>
Suggested-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Huang Ying <ying.huang@linux.alibaba.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Anshuman Khandual
2025-10-22 04:29:51 +01:00
committed by Andrew Morton
parent e37d5a2d60
commit eca1fba233
1 changed files with 13 additions and 0 deletions
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13
mm/debug_vm_pgtable.c
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@@ -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().