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-rw-r--r--mm/debug_vm_pgtable.c918
1 files changed, 559 insertions, 359 deletions
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index 1c922691aa61..1403639302e4 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -29,6 +29,8 @@
#include <linux/start_kernel.h>
#include <linux/sched/mm.h>
#include <linux/io.h>
+
+#include <asm/cacheflush.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
@@ -58,10 +60,41 @@
#define RANDOM_ORVALUE (GENMASK(BITS_PER_LONG - 1, 0) & ~ARCH_SKIP_MASK)
#define RANDOM_NZVALUE GENMASK(7, 0)
-static void __init pte_basic_tests(unsigned long pfn, int idx)
+struct pgtable_debug_args {
+ struct mm_struct *mm;
+ struct vm_area_struct *vma;
+
+ pgd_t *pgdp;
+ p4d_t *p4dp;
+ pud_t *pudp;
+ pmd_t *pmdp;
+ pte_t *ptep;
+
+ p4d_t *start_p4dp;
+ pud_t *start_pudp;
+ pmd_t *start_pmdp;
+ pgtable_t start_ptep;
+
+ unsigned long vaddr;
+ pgprot_t page_prot;
+ pgprot_t page_prot_none;
+
+ bool is_contiguous_page;
+ unsigned long pud_pfn;
+ unsigned long pmd_pfn;
+ unsigned long pte_pfn;
+
+ unsigned long fixed_pgd_pfn;
+ unsigned long fixed_p4d_pfn;
+ unsigned long fixed_pud_pfn;
+ unsigned long fixed_pmd_pfn;
+ unsigned long fixed_pte_pfn;
+};
+
+static void __init pte_basic_tests(struct pgtable_debug_args *args, int idx)
{
pgprot_t prot = protection_map[idx];
- pte_t pte = pfn_pte(pfn, prot);
+ pte_t pte = pfn_pte(args->fixed_pte_pfn, prot);
unsigned long val = idx, *ptr = &val;
pr_debug("Validating PTE basic (%pGv)\n", ptr);
@@ -86,53 +119,63 @@ static void __init pte_basic_tests(unsigned long pfn, int idx)
WARN_ON(!pte_dirty(pte_wrprotect(pte_mkdirty(pte))));
}
-static void __init pte_advanced_tests(struct mm_struct *mm,
- struct vm_area_struct *vma, pte_t *ptep,
- unsigned long pfn, unsigned long vaddr,
- pgprot_t prot)
+static void __init pte_advanced_tests(struct pgtable_debug_args *args)
{
+ struct page *page;
pte_t pte;
/*
* Architectures optimize set_pte_at by avoiding TLB flush.
* This requires set_pte_at to be not used to update an
* existing pte entry. Clear pte before we do set_pte_at
+ *
+ * flush_dcache_page() is called after set_pte_at() to clear
+ * PG_arch_1 for the page on ARM64. The page flag isn't cleared
+ * when it's released and page allocation check will fail when
+ * the page is allocated again. For architectures other than ARM64,
+ * the unexpected overhead of cache flushing is acceptable.
*/
+ page = (args->pte_pfn != ULONG_MAX) ? pfn_to_page(args->pte_pfn) : NULL;
+ if (!page)
+ return;
pr_debug("Validating PTE advanced\n");
- pte = pfn_pte(pfn, prot);
- set_pte_at(mm, vaddr, ptep, pte);
- ptep_set_wrprotect(mm, vaddr, ptep);
- pte = ptep_get(ptep);
+ pte = pfn_pte(args->pte_pfn, args->page_prot);
+ set_pte_at(args->mm, args->vaddr, args->ptep, pte);
+ flush_dcache_page(page);
+ ptep_set_wrprotect(args->mm, args->vaddr, args->ptep);
+ pte = ptep_get(args->ptep);
WARN_ON(pte_write(pte));
- ptep_get_and_clear(mm, vaddr, ptep);
- pte = ptep_get(ptep);
+ ptep_get_and_clear(args->mm, args->vaddr, args->ptep);
+ pte = ptep_get(args->ptep);
WARN_ON(!pte_none(pte));
- pte = pfn_pte(pfn, prot);
+ pte = pfn_pte(args->pte_pfn, args->page_prot);
pte = pte_wrprotect(pte);
pte = pte_mkclean(pte);
- set_pte_at(mm, vaddr, ptep, pte);
+ set_pte_at(args->mm, args->vaddr, args->ptep, pte);
+ flush_dcache_page(page);
pte = pte_mkwrite(pte);
pte = pte_mkdirty(pte);
- ptep_set_access_flags(vma, vaddr, ptep, pte, 1);
- pte = ptep_get(ptep);
+ ptep_set_access_flags(args->vma, args->vaddr, args->ptep, pte, 1);
+ pte = ptep_get(args->ptep);
WARN_ON(!(pte_write(pte) && pte_dirty(pte)));
- ptep_get_and_clear_full(mm, vaddr, ptep, 1);
- pte = ptep_get(ptep);
+ ptep_get_and_clear_full(args->mm, args->vaddr, args->ptep, 1);
+ pte = ptep_get(args->ptep);
WARN_ON(!pte_none(pte));
- pte = pfn_pte(pfn, prot);
+ pte = pfn_pte(args->pte_pfn, args->page_prot);
pte = pte_mkyoung(pte);
- set_pte_at(mm, vaddr, ptep, pte);
- ptep_test_and_clear_young(vma, vaddr, ptep);
- pte = ptep_get(ptep);
+ set_pte_at(args->mm, args->vaddr, args->ptep, pte);
+ flush_dcache_page(page);
+ ptep_test_and_clear_young(args->vma, args->vaddr, args->ptep);
+ pte = ptep_get(args->ptep);
WARN_ON(pte_young(pte));
}
-static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot)
+static void __init pte_savedwrite_tests(struct pgtable_debug_args *args)
{
- pte_t pte = pfn_pte(pfn, prot);
+ pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot_none);
if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
return;
@@ -143,7 +186,7 @@ static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot)
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static void __init pmd_basic_tests(unsigned long pfn, int idx)
+static void __init pmd_basic_tests(struct pgtable_debug_args *args, int idx)
{
pgprot_t prot = protection_map[idx];
unsigned long val = idx, *ptr = &val;
@@ -153,7 +196,7 @@ static void __init pmd_basic_tests(unsigned long pfn, int idx)
return;
pr_debug("Validating PMD basic (%pGv)\n", ptr);
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->fixed_pmd_pfn, prot);
/*
* This test needs to be executed after the given page table entry
@@ -181,57 +224,70 @@ static void __init pmd_basic_tests(unsigned long pfn, int idx)
WARN_ON(!pmd_bad(pmd_mkhuge(pmd)));
}
-static void __init pmd_advanced_tests(struct mm_struct *mm,
- struct vm_area_struct *vma, pmd_t *pmdp,
- unsigned long pfn, unsigned long vaddr,
- pgprot_t prot, pgtable_t pgtable)
+static void __init pmd_advanced_tests(struct pgtable_debug_args *args)
{
+ struct page *page;
pmd_t pmd;
+ unsigned long vaddr = args->vaddr;
if (!has_transparent_hugepage())
return;
+ page = (args->pmd_pfn != ULONG_MAX) ? pfn_to_page(args->pmd_pfn) : NULL;
+ if (!page)
+ return;
+
+ /*
+ * flush_dcache_page() is called after set_pmd_at() to clear
+ * PG_arch_1 for the page on ARM64. The page flag isn't cleared
+ * when it's released and page allocation check will fail when
+ * the page is allocated again. For architectures other than ARM64,
+ * the unexpected overhead of cache flushing is acceptable.
+ */
pr_debug("Validating PMD advanced\n");
/* Align the address wrt HPAGE_PMD_SIZE */
vaddr &= HPAGE_PMD_MASK;
- pgtable_trans_huge_deposit(mm, pmdp, pgtable);
+ pgtable_trans_huge_deposit(args->mm, args->pmdp, args->start_ptep);
- pmd = pfn_pmd(pfn, prot);
- set_pmd_at(mm, vaddr, pmdp, pmd);
- pmdp_set_wrprotect(mm, vaddr, pmdp);
- pmd = READ_ONCE(*pmdp);
+ pmd = pfn_pmd(args->pmd_pfn, args->page_prot);
+ set_pmd_at(args->mm, vaddr, args->pmdp, pmd);
+ flush_dcache_page(page);
+ pmdp_set_wrprotect(args->mm, vaddr, args->pmdp);
+ pmd = READ_ONCE(*args->pmdp);
WARN_ON(pmd_write(pmd));
- pmdp_huge_get_and_clear(mm, vaddr, pmdp);
- pmd = READ_ONCE(*pmdp);
+ pmdp_huge_get_and_clear(args->mm, vaddr, args->pmdp);
+ pmd = READ_ONCE(*args->pmdp);
WARN_ON(!pmd_none(pmd));
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->pmd_pfn, args->page_prot);
pmd = pmd_wrprotect(pmd);
pmd = pmd_mkclean(pmd);
- set_pmd_at(mm, vaddr, pmdp, pmd);
+ set_pmd_at(args->mm, vaddr, args->pmdp, pmd);
+ flush_dcache_page(page);
pmd = pmd_mkwrite(pmd);
pmd = pmd_mkdirty(pmd);
- pmdp_set_access_flags(vma, vaddr, pmdp, pmd, 1);
- pmd = READ_ONCE(*pmdp);
+ pmdp_set_access_flags(args->vma, vaddr, args->pmdp, pmd, 1);
+ pmd = READ_ONCE(*args->pmdp);
WARN_ON(!(pmd_write(pmd) && pmd_dirty(pmd)));
- pmdp_huge_get_and_clear_full(vma, vaddr, pmdp, 1);
- pmd = READ_ONCE(*pmdp);
+ pmdp_huge_get_and_clear_full(args->vma, vaddr, args->pmdp, 1);
+ pmd = READ_ONCE(*args->pmdp);
WARN_ON(!pmd_none(pmd));
- pmd = pmd_mkhuge(pfn_pmd(pfn, prot));
+ pmd = pmd_mkhuge(pfn_pmd(args->pmd_pfn, args->page_prot));
pmd = pmd_mkyoung(pmd);
- set_pmd_at(mm, vaddr, pmdp, pmd);
- pmdp_test_and_clear_young(vma, vaddr, pmdp);
- pmd = READ_ONCE(*pmdp);
+ set_pmd_at(args->mm, vaddr, args->pmdp, pmd);
+ flush_dcache_page(page);
+ pmdp_test_and_clear_young(args->vma, vaddr, args->pmdp);
+ pmd = READ_ONCE(*args->pmdp);
WARN_ON(pmd_young(pmd));
/* Clear the pte entries */
- pmdp_huge_get_and_clear(mm, vaddr, pmdp);
- pgtable = pgtable_trans_huge_withdraw(mm, pmdp);
+ pmdp_huge_get_and_clear(args->mm, vaddr, args->pmdp);
+ pgtable_trans_huge_withdraw(args->mm, args->pmdp);
}
-static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_leaf_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
@@ -239,7 +295,7 @@ static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PMD leaf\n");
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot);
/*
* PMD based THP is a leaf entry.
@@ -248,7 +304,7 @@ static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot)
WARN_ON(!pmd_leaf(pmd));
}
-static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_savedwrite_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
@@ -259,13 +315,13 @@ static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PMD saved write\n");
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot_none);
WARN_ON(!pmd_savedwrite(pmd_mk_savedwrite(pmd_clear_savedwrite(pmd))));
WARN_ON(pmd_savedwrite(pmd_clear_savedwrite(pmd_mk_savedwrite(pmd))));
}
#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
-static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int idx)
+static void __init pud_basic_tests(struct pgtable_debug_args *args, int idx)
{
pgprot_t prot = protection_map[idx];
unsigned long val = idx, *ptr = &val;
@@ -275,7 +331,7 @@ static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int
return;
pr_debug("Validating PUD basic (%pGv)\n", ptr);
- pud = pfn_pud(pfn, prot);
+ pud = pfn_pud(args->fixed_pud_pfn, prot);
/*
* This test needs to be executed after the given page table entry
@@ -296,7 +352,7 @@ static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int
WARN_ON(pud_dirty(pud_wrprotect(pud_mkclean(pud))));
WARN_ON(!pud_dirty(pud_wrprotect(pud_mkdirty(pud))));
- if (mm_pmd_folded(mm))
+ if (mm_pmd_folded(args->mm))
return;
/*
@@ -306,58 +362,71 @@ static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int
WARN_ON(!pud_bad(pud_mkhuge(pud)));
}
-static void __init pud_advanced_tests(struct mm_struct *mm,
- struct vm_area_struct *vma, pud_t *pudp,
- unsigned long pfn, unsigned long vaddr,
- pgprot_t prot)
+static void __init pud_advanced_tests(struct pgtable_debug_args *args)
{
+ struct page *page;
+ unsigned long vaddr = args->vaddr;
pud_t pud;
if (!has_transparent_hugepage())
return;
+ page = (args->pud_pfn != ULONG_MAX) ? pfn_to_page(args->pud_pfn) : NULL;
+ if (!page)
+ return;
+
+ /*
+ * flush_dcache_page() is called after set_pud_at() to clear
+ * PG_arch_1 for the page on ARM64. The page flag isn't cleared
+ * when it's released and page allocation check will fail when
+ * the page is allocated again. For architectures other than ARM64,
+ * the unexpected overhead of cache flushing is acceptable.
+ */
pr_debug("Validating PUD advanced\n");
/* Align the address wrt HPAGE_PUD_SIZE */
vaddr &= HPAGE_PUD_MASK;
- pud = pfn_pud(pfn, prot);
- set_pud_at(mm, vaddr, pudp, pud);
- pudp_set_wrprotect(mm, vaddr, pudp);
- pud = READ_ONCE(*pudp);
+ pud = pfn_pud(args->pud_pfn, args->page_prot);
+ set_pud_at(args->mm, vaddr, args->pudp, pud);
+ flush_dcache_page(page);
+ pudp_set_wrprotect(args->mm, vaddr, args->pudp);
+ pud = READ_ONCE(*args->pudp);
WARN_ON(pud_write(pud));
#ifndef __PAGETABLE_PMD_FOLDED
- pudp_huge_get_and_clear(mm, vaddr, pudp);
- pud = READ_ONCE(*pudp);
+ pudp_huge_get_and_clear(args->mm, vaddr, args->pudp);
+ pud = READ_ONCE(*args->pudp);
WARN_ON(!pud_none(pud));
#endif /* __PAGETABLE_PMD_FOLDED */
- pud = pfn_pud(pfn, prot);
+ pud = pfn_pud(args->pud_pfn, args->page_prot);
pud = pud_wrprotect(pud);
pud = pud_mkclean(pud);
- set_pud_at(mm, vaddr, pudp, pud);
+ set_pud_at(args->mm, vaddr, args->pudp, pud);
+ flush_dcache_page(page);
pud = pud_mkwrite(pud);
pud = pud_mkdirty(pud);
- pudp_set_access_flags(vma, vaddr, pudp, pud, 1);
- pud = READ_ONCE(*pudp);
+ pudp_set_access_flags(args->vma, vaddr, args->pudp, pud, 1);
+ pud = READ_ONCE(*args->pudp);
WARN_ON(!(pud_write(pud) && pud_dirty(pud)));
#ifndef __PAGETABLE_PMD_FOLDED
- pudp_huge_get_and_clear_full(mm, vaddr, pudp, 1);
- pud = READ_ONCE(*pudp);
+ pudp_huge_get_and_clear_full(args->mm, vaddr, args->pudp, 1);
+ pud = READ_ONCE(*args->pudp);
WARN_ON(!pud_none(pud));
#endif /* __PAGETABLE_PMD_FOLDED */
- pud = pfn_pud(pfn, prot);
+ pud = pfn_pud(args->pud_pfn, args->page_prot);
pud = pud_mkyoung(pud);
- set_pud_at(mm, vaddr, pudp, pud);
- pudp_test_and_clear_young(vma, vaddr, pudp);
- pud = READ_ONCE(*pudp);
+ set_pud_at(args->mm, vaddr, args->pudp, pud);
+ flush_dcache_page(page);
+ pudp_test_and_clear_young(args->vma, vaddr, args->pudp);
+ pud = READ_ONCE(*args->pudp);
WARN_ON(pud_young(pud));
- pudp_huge_get_and_clear(mm, vaddr, pudp);
+ pudp_huge_get_and_clear(args->mm, vaddr, args->pudp);
}
-static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot)
+static void __init pud_leaf_tests(struct pgtable_debug_args *args)
{
pud_t pud;
@@ -365,7 +434,7 @@ static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PUD leaf\n");
- pud = pfn_pud(pfn, prot);
+ pud = pfn_pud(args->fixed_pud_pfn, args->page_prot);
/*
* PUD based THP is a leaf entry.
*/
@@ -373,41 +442,26 @@ static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot)
WARN_ON(!pud_leaf(pud));
}
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
-static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int idx) { }
-static void __init pud_advanced_tests(struct mm_struct *mm,
- struct vm_area_struct *vma, pud_t *pudp,
- unsigned long pfn, unsigned long vaddr,
- pgprot_t prot)
-{
-}
-static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pud_basic_tests(struct pgtable_debug_args *args, int idx) { }
+static void __init pud_advanced_tests(struct pgtable_debug_args *args) { }
+static void __init pud_leaf_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
#else /* !CONFIG_TRANSPARENT_HUGEPAGE */
-static void __init pmd_basic_tests(unsigned long pfn, int idx) { }
-static void __init pud_basic_tests(struct mm_struct *mm, unsigned long pfn, int idx) { }
-static void __init pmd_advanced_tests(struct mm_struct *mm,
- struct vm_area_struct *vma, pmd_t *pmdp,
- unsigned long pfn, unsigned long vaddr,
- pgprot_t prot, pgtable_t pgtable)
-{
-}
-static void __init pud_advanced_tests(struct mm_struct *mm,
- struct vm_area_struct *vma, pud_t *pudp,
- unsigned long pfn, unsigned long vaddr,
- pgprot_t prot)
-{
-}
-static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot) { }
-static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot) { }
-static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pmd_basic_tests(struct pgtable_debug_args *args, int idx) { }
+static void __init pud_basic_tests(struct pgtable_debug_args *args, int idx) { }
+static void __init pmd_advanced_tests(struct pgtable_debug_args *args) { }
+static void __init pud_advanced_tests(struct pgtable_debug_args *args) { }
+static void __init pmd_leaf_tests(struct pgtable_debug_args *args) { }
+static void __init pud_leaf_tests(struct pgtable_debug_args *args) { }
+static void __init pmd_savedwrite_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
-static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
+static void __init pmd_huge_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
- if (!arch_vmap_pmd_supported(prot))
+ if (!arch_vmap_pmd_supported(args->page_prot))
return;
pr_debug("Validating PMD huge\n");
@@ -415,18 +469,18 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
* X86 defined pmd_set_huge() verifies that the given
* PMD is not a populated non-leaf entry.
*/
- WRITE_ONCE(*pmdp, __pmd(0));
- WARN_ON(!pmd_set_huge(pmdp, __pfn_to_phys(pfn), prot));
- WARN_ON(!pmd_clear_huge(pmdp));
- pmd = READ_ONCE(*pmdp);
+ WRITE_ONCE(*args->pmdp, __pmd(0));
+ WARN_ON(!pmd_set_huge(args->pmdp, __pfn_to_phys(args->fixed_pmd_pfn), args->page_prot));
+ WARN_ON(!pmd_clear_huge(args->pmdp));
+ pmd = READ_ONCE(*args->pmdp);
WARN_ON(!pmd_none(pmd));
}
-static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
+static void __init pud_huge_tests(struct pgtable_debug_args *args)
{
pud_t pud;
- if (!arch_vmap_pud_supported(prot))
+ if (!arch_vmap_pud_supported(args->page_prot))
return;
pr_debug("Validating PUD huge\n");
@@ -434,18 +488,18 @@ static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
* X86 defined pud_set_huge() verifies that the given
* PUD is not a populated non-leaf entry.
*/
- WRITE_ONCE(*pudp, __pud(0));
- WARN_ON(!pud_set_huge(pudp, __pfn_to_phys(pfn), prot));
- WARN_ON(!pud_clear_huge(pudp));
- pud = READ_ONCE(*pudp);
+ WRITE_ONCE(*args->pudp, __pud(0));
+ WARN_ON(!pud_set_huge(args->pudp, __pfn_to_phys(args->fixed_pud_pfn), args->page_prot));
+ WARN_ON(!pud_clear_huge(args->pudp));
+ pud = READ_ONCE(*args->pudp);
WARN_ON(!pud_none(pud));
}
#else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
-static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot) { }
-static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot) { }
+static void __init pmd_huge_tests(struct pgtable_debug_args *args) { }
+static void __init pud_huge_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
-static void __init p4d_basic_tests(unsigned long pfn, pgprot_t prot)
+static void __init p4d_basic_tests(struct pgtable_debug_args *args)
{
p4d_t p4d;
@@ -454,7 +508,7 @@ static void __init p4d_basic_tests(unsigned long pfn, pgprot_t prot)
WARN_ON(!p4d_same(p4d, p4d));
}
-static void __init pgd_basic_tests(unsigned long pfn, pgprot_t prot)
+static void __init pgd_basic_tests(struct pgtable_debug_args *args)
{
pgd_t pgd;
@@ -464,27 +518,26 @@ static void __init pgd_basic_tests(unsigned long pfn, pgprot_t prot)
}
#ifndef __PAGETABLE_PUD_FOLDED
-static void __init pud_clear_tests(struct mm_struct *mm, pud_t *pudp)
+static void __init pud_clear_tests(struct pgtable_debug_args *args)
{
- pud_t pud = READ_ONCE(*pudp);
+ pud_t pud = READ_ONCE(*args->pudp);
- if (mm_pmd_folded(mm))
+ if (mm_pmd_folded(args->mm))
return;
pr_debug("Validating PUD clear\n");
pud = __pud(pud_val(pud) | RANDOM_ORVALUE);
- WRITE_ONCE(*pudp, pud);
- pud_clear(pudp);
- pud = READ_ONCE(*pudp);
+ WRITE_ONCE(*args->pudp, pud);
+ pud_clear(args->pudp);
+ pud = READ_ONCE(*args->pudp);
WARN_ON(!pud_none(pud));
}
-static void __init pud_populate_tests(struct mm_struct *mm, pud_t *pudp,
- pmd_t *pmdp)
+static void __init pud_populate_tests(struct pgtable_debug_args *args)
{
pud_t pud;
- if (mm_pmd_folded(mm))
+ if (mm_pmd_folded(args->mm))
return;
pr_debug("Validating PUD populate\n");
@@ -492,40 +545,36 @@ static void __init pud_populate_tests(struct mm_struct *mm, pud_t *pudp,
* This entry points to next level page table page.
* Hence this must not qualify as pud_bad().
*/
- pud_populate(mm, pudp, pmdp);
- pud = READ_ONCE(*pudp);
+ pud_populate(args->mm, args->pudp, args->start_pmdp);
+ pud = READ_ONCE(*args->pudp);
WARN_ON(pud_bad(pud));
}
#else /* !__PAGETABLE_PUD_FOLDED */
-static void __init pud_clear_tests(struct mm_struct *mm, pud_t *pudp) { }
-static void __init pud_populate_tests(struct mm_struct *mm, pud_t *pudp,
- pmd_t *pmdp)
-{
-}
+static void __init pud_clear_tests(struct pgtable_debug_args *args) { }
+static void __init pud_populate_tests(struct pgtable_debug_args *args) { }
#endif /* PAGETABLE_PUD_FOLDED */
#ifndef __PAGETABLE_P4D_FOLDED
-static void __init p4d_clear_tests(struct mm_struct *mm, p4d_t *p4dp)
+static void __init p4d_clear_tests(struct pgtable_debug_args *args)
{
- p4d_t p4d = READ_ONCE(*p4dp);
+ p4d_t p4d = READ_ONCE(*args->p4dp);
- if (mm_pud_folded(mm))
+ if (mm_pud_folded(args->mm))
return;
pr_debug("Validating P4D clear\n");
p4d = __p4d(p4d_val(p4d) | RANDOM_ORVALUE);
- WRITE_ONCE(*p4dp, p4d);
- p4d_clear(p4dp);
- p4d = READ_ONCE(*p4dp);
+ WRITE_ONCE(*args->p4dp, p4d);
+ p4d_clear(args->p4dp);
+ p4d = READ_ONCE(*args->p4dp);
WARN_ON(!p4d_none(p4d));
}
-static void __init p4d_populate_tests(struct mm_struct *mm, p4d_t *p4dp,
- pud_t *pudp)
+static void __init p4d_populate_tests(struct pgtable_debug_args *args)
{
p4d_t p4d;
- if (mm_pud_folded(mm))
+ if (mm_pud_folded(args->mm))
return;
pr_debug("Validating P4D populate\n");
@@ -533,34 +582,33 @@ static void __init p4d_populate_tests(struct mm_struct *mm, p4d_t *p4dp,
* This entry points to next level page table page.
* Hence this must not qualify as p4d_bad().
*/
- pud_clear(pudp);
- p4d_clear(p4dp);
- p4d_populate(mm, p4dp, pudp);
- p4d = READ_ONCE(*p4dp);
+ pud_clear(args->pudp);
+ p4d_clear(args->p4dp);
+ p4d_populate(args->mm, args->p4dp, args->start_pudp);
+ p4d = READ_ONCE(*args->p4dp);
WARN_ON(p4d_bad(p4d));
}
-static void __init pgd_clear_tests(struct mm_struct *mm, pgd_t *pgdp)
+static void __init pgd_clear_tests(struct pgtable_debug_args *args)
{
- pgd_t pgd = READ_ONCE(*pgdp);
+ pgd_t pgd = READ_ONCE(*(args->pgdp));
- if (mm_p4d_folded(mm))
+ if (mm_p4d_folded(args->mm))
return;
pr_debug("Validating PGD clear\n");
pgd = __pgd(pgd_val(pgd) | RANDOM_ORVALUE);
- WRITE_ONCE(*pgdp, pgd);
- pgd_clear(pgdp);
- pgd = READ_ONCE(*pgdp);
+ WRITE_ONCE(*args->pgdp, pgd);
+ pgd_clear(args->pgdp);
+ pgd = READ_ONCE(*args->pgdp);
WARN_ON(!pgd_none(pgd));
}
-static void __init pgd_populate_tests(struct mm_struct *mm, pgd_t *pgdp,
- p4d_t *p4dp)
+static void __init pgd_populate_tests(struct pgtable_debug_args *args)
{
pgd_t pgd;
- if (mm_p4d_folded(mm))
+ if (mm_p4d_folded(args->mm))
return;
pr_debug("Validating PGD populate\n");
@@ -568,56 +616,60 @@ static void __init pgd_populate_tests(struct mm_struct *mm, pgd_t *pgdp,
* This entry points to next level page table page.
* Hence this must not qualify as pgd_bad().
*/
- p4d_clear(p4dp);
- pgd_clear(pgdp);
- pgd_populate(mm, pgdp, p4dp);
- pgd = READ_ONCE(*pgdp);
+ p4d_clear(args->p4dp);
+ pgd_clear(args->pgdp);
+ pgd_populate(args->mm, args->pgdp, args->start_p4dp);
+ pgd = READ_ONCE(*args->pgdp);
WARN_ON(pgd_bad(pgd));
}
#else /* !__PAGETABLE_P4D_FOLDED */
-static void __init p4d_clear_tests(struct mm_struct *mm, p4d_t *p4dp) { }
-static void __init pgd_clear_tests(struct mm_struct *mm, pgd_t *pgdp) { }
-static void __init p4d_populate_tests(struct mm_struct *mm, p4d_t *p4dp,
- pud_t *pudp)
-{
-}
-static void __init pgd_populate_tests(struct mm_struct *mm, pgd_t *pgdp,
- p4d_t *p4dp)
-{
-}
+static void __init p4d_clear_tests(struct pgtable_debug_args *args) { }
+static void __init pgd_clear_tests(struct pgtable_debug_args *args) { }
+static void __init p4d_populate_tests(struct pgtable_debug_args *args) { }
+static void __init pgd_populate_tests(struct pgtable_debug_args *args) { }
#endif /* PAGETABLE_P4D_FOLDED */
-static void __init pte_clear_tests(struct mm_struct *mm, pte_t *ptep,
- unsigned long pfn, unsigned long vaddr,
- pgprot_t prot)
+static void __init pte_clear_tests(struct pgtable_debug_args *args)
{
- pte_t pte = pfn_pte(pfn, prot);
+ struct page *page;
+ pte_t pte = pfn_pte(args->pte_pfn, args->page_prot);
+
+ page = (args->pte_pfn != ULONG_MAX) ? pfn_to_page(args->pte_pfn) : NULL;
+ if (!page)
+ return;
+ /*
+ * flush_dcache_page() is called after set_pte_at() to clear
+ * PG_arch_1 for the page on ARM64. The page flag isn't cleared
+ * when it's released and page allocation check will fail when
+ * the page is allocated again. For architectures other than ARM64,
+ * the unexpected overhead of cache flushing is acceptable.
+ */
pr_debug("Validating PTE clear\n");
#ifndef CONFIG_RISCV
pte = __pte(pte_val(pte) | RANDOM_ORVALUE);
#endif
- set_pte_at(mm, vaddr, ptep, pte);
+ set_pte_at(args->mm, args->vaddr, args->ptep, pte);
+ flush_dcache_page(page);
barrier();
- pte_clear(mm, vaddr, ptep);
- pte = ptep_get(ptep);
+ pte_clear(args->mm, args->vaddr, args->ptep);
+ pte = ptep_get(args->ptep);
WARN_ON(!pte_none(pte));
}
-static void __init pmd_clear_tests(struct mm_struct *mm, pmd_t *pmdp)
+static void __init pmd_clear_tests(struct pgtable_debug_args *args)
{
- pmd_t pmd = READ_ONCE(*pmdp);
+ pmd_t pmd = READ_ONCE(*args->pmdp);
pr_debug("Validating PMD clear\n");
pmd = __pmd(pmd_val(pmd) | RANDOM_ORVALUE);
- WRITE_ONCE(*pmdp, pmd);
- pmd_clear(pmdp);
- pmd = READ_ONCE(*pmdp);
+ WRITE_ONCE(*args->pmdp, pmd);
+ pmd_clear(args->pmdp);
+ pmd = READ_ONCE(*args->pmdp);
WARN_ON(!pmd_none(pmd));
}
-static void __init pmd_populate_tests(struct mm_struct *mm, pmd_t *pmdp,
- pgtable_t pgtable)
+static void __init pmd_populate_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
@@ -626,14 +678,14 @@ static void __init pmd_populate_tests(struct mm_struct *mm, pmd_t *pmdp,
* This entry points to next level page table page.
* Hence this must not qualify as pmd_bad().
*/
- pmd_populate(mm, pmdp, pgtable);
- pmd = READ_ONCE(*pmdp);
+ pmd_populate(args->mm, args->pmdp, args->start_ptep);
+ pmd = READ_ONCE(*args->pmdp);
WARN_ON(pmd_bad(pmd));
}
-static void __init pte_special_tests(unsigned long pfn, pgprot_t prot)
+static void __init pte_special_tests(struct pgtable_debug_args *args)
{
- pte_t pte = pfn_pte(pfn, prot);
+ pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot);
if (!IS_ENABLED(CONFIG_ARCH_HAS_PTE_SPECIAL))
return;
@@ -642,9 +694,9 @@ static void __init pte_special_tests(unsigned long pfn, pgprot_t prot)
WARN_ON(!pte_special(pte_mkspecial(pte)));
}
-static void __init pte_protnone_tests(unsigned long pfn, pgprot_t prot)
+static void __init pte_protnone_tests(struct pgtable_debug_args *args)
{
- pte_t pte = pfn_pte(pfn, prot);
+ pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot_none);
if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
return;
@@ -655,7 +707,7 @@ static void __init pte_protnone_tests(unsigned long pfn, pgprot_t prot)
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_protnone_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
@@ -666,25 +718,25 @@ static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PMD protnone\n");
- pmd = pmd_mkhuge(pfn_pmd(pfn, prot));
+ pmd = pmd_mkhuge(pfn_pmd(args->fixed_pmd_pfn, args->page_prot_none));
WARN_ON(!pmd_protnone(pmd));
WARN_ON(!pmd_present(pmd));
}
#else /* !CONFIG_TRANSPARENT_HUGEPAGE */
-static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pmd_protnone_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#ifdef CONFIG_ARCH_HAS_PTE_DEVMAP
-static void __init pte_devmap_tests(unsigned long pfn, pgprot_t prot)
+static void __init pte_devmap_tests(struct pgtable_debug_args *args)
{
- pte_t pte = pfn_pte(pfn, prot);
+ pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot);
pr_debug("Validating PTE devmap\n");
WARN_ON(!pte_devmap(pte_mkdevmap(pte)));
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_devmap_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
@@ -692,12 +744,12 @@ static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PMD devmap\n");
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot);
WARN_ON(!pmd_devmap(pmd_mkdevmap(pmd)));
}
#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
-static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot)
+static void __init pud_devmap_tests(struct pgtable_debug_args *args)
{
pud_t pud;
@@ -705,25 +757,25 @@ static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PUD devmap\n");
- pud = pfn_pud(pfn, prot);
+ pud = pfn_pud(args->fixed_pud_pfn, args->page_prot);
WARN_ON(!pud_devmap(pud_mkdevmap(pud)));
}
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
-static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pud_devmap_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
#else /* CONFIG_TRANSPARENT_HUGEPAGE */
-static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot) { }
-static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pmd_devmap_tests(struct pgtable_debug_args *args) { }
+static void __init pud_devmap_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#else
-static void __init pte_devmap_tests(unsigned long pfn, pgprot_t prot) { }
-static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot) { }
-static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pte_devmap_tests(struct pgtable_debug_args *args) { }
+static void __init pmd_devmap_tests(struct pgtable_debug_args *args) { }
+static void __init pud_devmap_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_ARCH_HAS_PTE_DEVMAP */
-static void __init pte_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
+static void __init pte_soft_dirty_tests(struct pgtable_debug_args *args)
{
- pte_t pte = pfn_pte(pfn, prot);
+ pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot);
if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
return;
@@ -733,9 +785,9 @@ static void __init pte_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
WARN_ON(pte_soft_dirty(pte_clear_soft_dirty(pte)));
}
-static void __init pte_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
+static void __init pte_swap_soft_dirty_tests(struct pgtable_debug_args *args)
{
- pte_t pte = pfn_pte(pfn, prot);
+ pte_t pte = pfn_pte(args->fixed_pte_pfn, args->page_prot);
if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
return;
@@ -746,7 +798,7 @@ static void __init pte_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static void __init pmd_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_soft_dirty_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
@@ -757,12 +809,12 @@ static void __init pmd_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PMD soft dirty\n");
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot);
WARN_ON(!pmd_soft_dirty(pmd_mksoft_dirty(pmd)));
WARN_ON(pmd_soft_dirty(pmd_clear_soft_dirty(pmd)));
}
-static void __init pmd_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_swap_soft_dirty_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
@@ -774,31 +826,29 @@ static void __init pmd_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PMD swap soft dirty\n");
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot);
WARN_ON(!pmd_swp_soft_dirty(pmd_swp_mksoft_dirty(pmd)));
WARN_ON(pmd_swp_soft_dirty(pmd_swp_clear_soft_dirty(pmd)));
}
#else /* !CONFIG_TRANSPARENT_HUGEPAGE */
-static void __init pmd_soft_dirty_tests(unsigned long pfn, pgprot_t prot) { }
-static void __init pmd_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
-{
-}
+static void __init pmd_soft_dirty_tests(struct pgtable_debug_args *args) { }
+static void __init pmd_swap_soft_dirty_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-static void __init pte_swap_tests(unsigned long pfn, pgprot_t prot)
+static void __init pte_swap_tests(struct pgtable_debug_args *args)
{
swp_entry_t swp;
pte_t pte;
pr_debug("Validating PTE swap\n");
- pte = pfn_pte(pfn, prot);
+ pte = pfn_pte(args->fixed_pte_pfn, args->page_prot);
swp = __pte_to_swp_entry(pte);
pte = __swp_entry_to_pte(swp);
- WARN_ON(pfn != pte_pfn(pte));
+ WARN_ON(args->fixed_pte_pfn != pte_pfn(pte));
}
#ifdef CONFIG_ARCH_ENABLE_THP_MIGRATION
-static void __init pmd_swap_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_swap_tests(struct pgtable_debug_args *args)
{
swp_entry_t swp;
pmd_t pmd;
@@ -807,16 +857,16 @@ static void __init pmd_swap_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PMD swap\n");
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot);
swp = __pmd_to_swp_entry(pmd);
pmd = __swp_entry_to_pmd(swp);
- WARN_ON(pfn != pmd_pfn(pmd));
+ WARN_ON(args->fixed_pmd_pfn != pmd_pfn(pmd));
}
#else /* !CONFIG_ARCH_ENABLE_THP_MIGRATION */
-static void __init pmd_swap_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pmd_swap_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_ARCH_ENABLE_THP_MIGRATION */
-static void __init swap_migration_tests(void)
+static void __init swap_migration_tests(struct pgtable_debug_args *args)
{
struct page *page;
swp_entry_t swp;
@@ -824,19 +874,18 @@ static void __init swap_migration_tests(void)
if (!IS_ENABLED(CONFIG_MIGRATION))
return;
- pr_debug("Validating swap migration\n");
/*
* swap_migration_tests() requires a dedicated page as it needs to
* be locked before creating a migration entry from it. Locking the
* page that actually maps kernel text ('start_kernel') can be real
- * problematic. Lets allocate a dedicated page explicitly for this
- * purpose that will be freed subsequently.
+ * problematic. Lets use the allocated page explicitly for this
+ * purpose.
*/
- page = alloc_page(GFP_KERNEL);
- if (!page) {
- pr_err("page allocation failed\n");
+ page = (args->pte_pfn != ULONG_MAX) ? pfn_to_page(args->pte_pfn) : NULL;
+ if (!page)
return;
- }
+
+ pr_debug("Validating swap migration\n");
/*
* make_migration_entry() expects given page to be
@@ -855,11 +904,10 @@ static void __init swap_migration_tests(void)
WARN_ON(!is_migration_entry(swp));
WARN_ON(is_writable_migration_entry(swp));
__ClearPageLocked(page);
- __free_page(page);
}
#ifdef CONFIG_HUGETLB_PAGE
-static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot)
+static void __init hugetlb_basic_tests(struct pgtable_debug_args *args)
{
struct page *page;
pte_t pte;
@@ -869,25 +917,25 @@ static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot)
* Accessing the page associated with the pfn is safe here,
* as it was previously derived from a real kernel symbol.
*/
- page = pfn_to_page(pfn);
- pte = mk_huge_pte(page, prot);
+ page = pfn_to_page(args->fixed_pmd_pfn);
+ pte = mk_huge_pte(page, args->page_prot);
WARN_ON(!huge_pte_dirty(huge_pte_mkdirty(pte)));
WARN_ON(!huge_pte_write(huge_pte_mkwrite(huge_pte_wrprotect(pte))));
WARN_ON(huge_pte_write(huge_pte_wrprotect(huge_pte_mkwrite(pte))));
#ifdef CONFIG_ARCH_WANT_GENERAL_HUGETLB
- pte = pfn_pte(pfn, prot);
+ pte = pfn_pte(args->fixed_pmd_pfn, args->page_prot);
WARN_ON(!pte_huge(pte_mkhuge(pte)));
#endif /* CONFIG_ARCH_WANT_GENERAL_HUGETLB */
}
#else /* !CONFIG_HUGETLB_PAGE */
-static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init hugetlb_basic_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_HUGETLB_PAGE */
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
+static void __init pmd_thp_tests(struct pgtable_debug_args *args)
{
pmd_t pmd;
@@ -906,7 +954,7 @@ static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
* needs to return true. pmd_present() should be true whenever
* pmd_trans_huge() returns true.
*/
- pmd = pfn_pmd(pfn, prot);
+ pmd = pfn_pmd(args->fixed_pmd_pfn, args->page_prot);
WARN_ON(!pmd_trans_huge(pmd_mkhuge(pmd)));
#ifndef __HAVE_ARCH_PMDP_INVALIDATE
@@ -916,7 +964,7 @@ static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
}
#ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD
-static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
+static void __init pud_thp_tests(struct pgtable_debug_args *args)
{
pud_t pud;
@@ -924,7 +972,7 @@ static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
return;
pr_debug("Validating PUD based THP\n");
- pud = pfn_pud(pfn, prot);
+ pud = pfn_pud(args->fixed_pud_pfn, args->page_prot);
WARN_ON(!pud_trans_huge(pud_mkhuge(pud)));
/*
@@ -936,11 +984,11 @@ static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
*/
}
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
-static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pud_thp_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
#else /* !CONFIG_TRANSPARENT_HUGEPAGE */
-static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot) { }
-static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot) { }
+static void __init pmd_thp_tests(struct pgtable_debug_args *args) { }
+static void __init pud_thp_tests(struct pgtable_debug_args *args) { }
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
static unsigned long __init get_random_vaddr(void)
@@ -955,43 +1003,179 @@ static unsigned long __init get_random_vaddr(void)
return random_vaddr;
}
-static int __init debug_vm_pgtable(void)
+static void __init destroy_args(struct pgtable_debug_args *args)
{
- struct vm_area_struct *vma;
- struct mm_struct *mm;
- pgd_t *pgdp;
- p4d_t *p4dp, *saved_p4dp;
- pud_t *pudp, *saved_pudp;
- pmd_t *pmdp, *saved_pmdp, pmd;
- pte_t *ptep;
- pgtable_t saved_ptep;
- pgprot_t prot, protnone;
- phys_addr_t paddr;
- unsigned long vaddr, pte_aligned, pmd_aligned;
- unsigned long pud_aligned, p4d_aligned, pgd_aligned;
- spinlock_t *ptl = NULL;
- int idx;
+ struct page *page = NULL;
+
+ /* Free (huge) page */
+ if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) &&
+ IS_ENABLED(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) &&
+ has_transparent_hugepage() &&
+ args->pud_pfn != ULONG_MAX) {
+ if (args->is_contiguous_page) {
+ free_contig_range(args->pud_pfn,
+ (1 << (HPAGE_PUD_SHIFT - PAGE_SHIFT)));
+ } else {
+ page = pfn_to_page(args->pud_pfn);
+ __free_pages(page, HPAGE_PUD_SHIFT - PAGE_SHIFT);
+ }
+
+ args->pud_pfn = ULONG_MAX;
+ args->pmd_pfn = ULONG_MAX;
+ args->pte_pfn = ULONG_MAX;
+ }
- pr_info("Validating architecture page table helpers\n");
- prot = vm_get_page_prot(VMFLAGS);
- vaddr = get_random_vaddr();
- mm = mm_alloc();
- if (!mm) {
- pr_err("mm_struct allocation failed\n");
- return 1;
+ if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) &&
+ has_transparent_hugepage() &&
+ args->pmd_pfn != ULONG_MAX) {
+ if (args->is_contiguous_page) {
+ free_contig_range(args->pmd_pfn, (1 << HPAGE_PMD_ORDER));
+ } else {
+ page = pfn_to_page(args->pmd_pfn);
+ __free_pages(page, HPAGE_PMD_ORDER);
+ }
+
+ args->pmd_pfn = ULONG_MAX;
+ args->pte_pfn = ULONG_MAX;
}
+ if (args->pte_pfn != ULONG_MAX) {
+ page = pfn_to_page(args->pte_pfn);
+ __free_pages(page, 0);
+
+ args->pte_pfn = ULONG_MAX;
+ }
+
+ /* Free page table entries */
+ if (args->start_ptep) {
+ pte_free(args->mm, args->start_ptep);
+ mm_dec_nr_ptes(args->mm);
+ }
+
+ if (args->start_pmdp) {
+ pmd_free(args->mm, args->start_pmdp);
+ mm_dec_nr_pmds(args->mm);
+ }
+
+ if (args->start_pudp) {
+ pud_free(args->mm, args->start_pudp);
+ mm_dec_nr_puds(args->mm);
+ }
+
+ if (args->start_p4dp)
+ p4d_free(args->mm, args->start_p4dp);
+
+ /* Free vma and mm struct */
+ if (args->vma)
+ vm_area_free(args->vma);
+
+ if (args->mm)
+ mmdrop(args->mm);
+}
+
+static struct page * __init
+debug_vm_pgtable_alloc_huge_page(struct pgtable_debug_args *args, int order)
+{
+ struct page *page = NULL;
+
+#ifdef CONFIG_CONTIG_ALLOC
+ if (order >= MAX_ORDER) {
+ page = alloc_contig_pages((1 << order), GFP_KERNEL,
+ first_online_node, NULL);
+ if (page) {
+ args->is_contiguous_page = true;
+ return page;
+ }
+ }
+#endif
+
+ if (order < MAX_ORDER)
+ page = alloc_pages(GFP_KERNEL, order);
+
+ return page;
+}
+
+static int __init init_args(struct pgtable_debug_args *args)
+{
+ struct page *page = NULL;
+ phys_addr_t phys;
+ int ret = 0;
+
/*
+ * Initialize the debugging data.
+ *
* __P000 (or even __S000) will help create page table entries with
* PROT_NONE permission as required for pxx_protnone_tests().
*/
- protnone = __P000;
+ memset(args, 0, sizeof(*args));
+ args->vaddr = get_random_vaddr();
+ args->page_prot = vm_get_page_prot(VMFLAGS);
+ args->page_prot_none = __P000;
+ args->is_contiguous_page = false;
+ args->pud_pfn = ULONG_MAX;
+ args->pmd_pfn = ULONG_MAX;
+ args->pte_pfn = ULONG_MAX;
+ args->fixed_pgd_pfn = ULONG_MAX;
+ args->fixed_p4d_pfn = ULONG_MAX;
+ args->fixed_pud_pfn = ULONG_MAX;
+ args->fixed_pmd_pfn = ULONG_MAX;
+ args->fixed_pte_pfn = ULONG_MAX;
+
+ /* Allocate mm and vma */
+ args->mm = mm_alloc();
+ if (!args->mm) {
+ pr_err("Failed to allocate mm struct\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ args->vma = vm_area_alloc(args->mm);
+ if (!args->vma) {
+ pr_err("Failed to allocate vma\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ /*
+ * Allocate page table entries. They will be modified in the tests.
+ * Lets save the page table entries so that they can be released
+ * when the tests are completed.
+ */
+ args->pgdp = pgd_offset(args->mm, args->vaddr);
+ args->p4dp = p4d_alloc(args->mm, args->pgdp, args->vaddr);
+ if (!args->p4dp) {
+ pr_err("Failed to allocate p4d entries\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ args->start_p4dp = p4d_offset(args->pgdp, 0UL);
+ WARN_ON(!args->start_p4dp);
+
+ args->pudp = pud_alloc(args->mm, args->p4dp, args->vaddr);
+ if (!args->pudp) {
+ pr_err("Failed to allocate pud entries\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ args->start_pudp = pud_offset(args->p4dp, 0UL);
+ WARN_ON(!args->start_pudp);
+
+ args->pmdp = pmd_alloc(args->mm, args->pudp, args->vaddr);
+ if (!args->pmdp) {
+ pr_err("Failed to allocate pmd entries\n");
+ ret = -ENOMEM;
+ goto error;
+ }
+ args->start_pmdp = pmd_offset(args->pudp, 0UL);
+ WARN_ON(!args->start_pmdp);
- vma = vm_area_alloc(mm);
- if (!vma) {
- pr_err("vma allocation failed\n");
- return 1;
+ if (pte_alloc(args->mm, args->pmdp)) {
+ pr_err("Failed to allocate pte entries\n");
+ ret = -ENOMEM;
+ goto error;
}
+ args->start_ptep = pmd_pgtable(READ_ONCE(*args->pmdp));
+ WARN_ON(!args->start_ptep);
/*
* PFN for mapping at PTE level is determined from a standard kernel
@@ -1000,40 +1184,65 @@ static int __init debug_vm_pgtable(void)
* exist on the platform but that does not really matter as pfn_pxx()
* helpers will still create appropriate entries for the test. This
* helps avoid large memory block allocations to be used for mapping
- * at higher page table levels.
+ * at higher page table levels in some of the tests.
*/
- paddr = __pa_symbol(&start_kernel);
-
- pte_aligned = (paddr & PAGE_MASK) >> PAGE_SHIFT;
- pmd_aligned = (paddr & PMD_MASK) >> PAGE_SHIFT;
- pud_aligned = (paddr & PUD_MASK) >> PAGE_SHIFT;
- p4d_aligned = (paddr & P4D_MASK) >> PAGE_SHIFT;
- pgd_aligned = (paddr & PGDIR_MASK) >> PAGE_SHIFT;
- WARN_ON(!pfn_valid(pte_aligned));
-
- pgdp = pgd_offset(mm, vaddr);
- p4dp = p4d_alloc(mm, pgdp, vaddr);
- pudp = pud_alloc(mm, p4dp, vaddr);
- pmdp = pmd_alloc(mm, pudp, vaddr);
+ phys = __pa_symbol(&start_kernel);
+ args->fixed_pgd_pfn = __phys_to_pfn(phys & PGDIR_MASK);
+ args->fixed_p4d_pfn = __phys_to_pfn(phys & P4D_MASK);
+ args->fixed_pud_pfn = __phys_to_pfn(phys & PUD_MASK);
+ args->fixed_pmd_pfn = __phys_to_pfn(phys & PMD_MASK);
+ args->fixed_pte_pfn = __phys_to_pfn(phys & PAGE_MASK);
+ WARN_ON(!pfn_valid(args->fixed_pte_pfn));
+
/*
- * Allocate pgtable_t
+ * Allocate (huge) pages because some of the tests need to access
+ * the data in the pages. The corresponding tests will be skipped
+ * if we fail to allocate (huge) pages.
*/
- if (pte_alloc(mm, pmdp)) {
- pr_err("pgtable allocation failed\n");
- return 1;
+ if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) &&
+ IS_ENABLED(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) &&
+ has_transparent_hugepage()) {
+ page = debug_vm_pgtable_alloc_huge_page(args,
+ HPAGE_PUD_SHIFT - PAGE_SHIFT);
+ if (page) {
+ args->pud_pfn = page_to_pfn(page);
+ args->pmd_pfn = args->pud_pfn;
+ args->pte_pfn = args->pud_pfn;
+ return 0;
+ }
}
- /*
- * Save all the page table page addresses as the page table
- * entries will be used for testing with random or garbage
- * values. These saved addresses will be used for freeing
- * page table pages.
- */
- pmd = READ_ONCE(*pmdp);
- saved_p4dp = p4d_offset(pgdp, 0UL);
- saved_pudp = pud_offset(p4dp, 0UL);
- saved_pmdp = pmd_offset(pudp, 0UL);
- saved_ptep = pmd_pgtable(pmd);
+ if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) &&
+ has_transparent_hugepage()) {
+ page = debug_vm_pgtable_alloc_huge_page(args, HPAGE_PMD_ORDER);
+ if (page) {
+ args->pmd_pfn = page_to_pfn(page);
+ args->pte_pfn = args->pmd_pfn;
+ return 0;
+ }
+ }
+
+ page = alloc_pages(GFP_KERNEL, 0);
+ if (page)
+ args->pte_pfn = page_to_pfn(page);
+
+ return 0;
+
+error:
+ destroy_args(args);
+ return ret;
+}
+
+static int __init debug_vm_pgtable(void)
+{
+ struct pgtable_debug_args args;
+ spinlock_t *ptl = NULL;
+ int idx, ret;
+
+ pr_info("Validating architecture page table helpers\n");
+ ret = init_args(&args);
+ if (ret)
+ return ret;
/*
* Iterate over the protection_map[] to make sure that all
@@ -1042,9 +1251,9 @@ static int __init debug_vm_pgtable(void)
* given page table entry.
*/
for (idx = 0; idx < ARRAY_SIZE(protection_map); idx++) {
- pte_basic_tests(pte_aligned, idx);
- pmd_basic_tests(pmd_aligned, idx);
- pud_basic_tests(mm, pud_aligned, idx);
+ pte_basic_tests(&args, idx);
+ pmd_basic_tests(&args, idx);
+ pud_basic_tests(&args, idx);
}
/*
@@ -1054,79 +1263,70 @@ static int __init debug_vm_pgtable(void)
* the above iteration for now to save some test execution
* time.
*/
- p4d_basic_tests(p4d_aligned, prot);
- pgd_basic_tests(pgd_aligned, prot);
+ p4d_basic_tests(&args);
+ pgd_basic_tests(&args);
- pmd_leaf_tests(pmd_aligned, prot);
- pud_leaf_tests(pud_aligned, prot);
+ pmd_leaf_tests(&args);
+ pud_leaf_tests(&args);
- pte_savedwrite_tests(pte_aligned, protnone);
- pmd_savedwrite_tests(pmd_aligned, protnone);
+ pte_savedwrite_tests(&args);
+ pmd_savedwrite_tests(&args);
- pte_special_tests(pte_aligned, prot);
- pte_protnone_tests(pte_aligned, protnone);
- pmd_protnone_tests(pmd_aligned, protnone);
+ pte_special_tests(&args);
+ pte_protnone_tests(&args);
+ pmd_protnone_tests(&args);
- pte_devmap_tests(pte_aligned, prot);
- pmd_devmap_tests(pmd_aligned, prot);
- pud_devmap_tests(pud_aligned, prot);
+ pte_devmap_tests(&args);
+ pmd_devmap_tests(&args);
+ pud_devmap_tests(&args);
- pte_soft_dirty_tests(pte_aligned, prot);
- pmd_soft_dirty_tests(pmd_aligned, prot);
- pte_swap_soft_dirty_tests(pte_aligned, prot);
- pmd_swap_soft_dirty_tests(pmd_aligned, prot);
+ pte_soft_dirty_tests(&args);
+ pmd_soft_dirty_tests(&args);
+ pte_swap_soft_dirty_tests(&args);
+ pmd_swap_soft_dirty_tests(&args);
- pte_swap_tests(pte_aligned, prot);
- pmd_swap_tests(pmd_aligned, prot);
+ pte_swap_tests(&args);
+ pmd_swap_tests(&args);
- swap_migration_tests();
+ swap_migration_tests(&args);
- pmd_thp_tests(pmd_aligned, prot);
- pud_thp_tests(pud_aligned, prot);
+ pmd_thp_tests(&args);
+ pud_thp_tests(&args);
- hugetlb_basic_tests(pte_aligned, prot);
+ hugetlb_basic_tests(&args);
/*
* Page table modifying tests. They need to hold
* proper page table lock.
*/
- ptep = pte_offset_map_lock(mm, pmdp, vaddr, &ptl);
- pte_clear_tests(mm, ptep, pte_aligned, vaddr, prot);
- pte_advanced_tests(mm, vma, ptep, pte_aligned, vaddr, prot);
- pte_unmap_unlock(ptep, ptl);
+ args.ptep = pte_offset_map_lock(args.mm, args.pmdp, args.vaddr, &ptl);
+ pte_clear_tests(&args);
+ pte_advanced_tests(&args);
+ pte_unmap_unlock(args.ptep, ptl);
- ptl = pmd_lock(mm, pmdp);
- pmd_clear_tests(mm, pmdp);
- pmd_advanced_tests(mm, vma, pmdp, pmd_aligned, vaddr, prot, saved_ptep);
- pmd_huge_tests(pmdp, pmd_aligned, prot);
- pmd_populate_tests(mm, pmdp, saved_ptep);
+ ptl = pmd_lock(args.mm, args.pmdp);
+ pmd_clear_tests(&args);
+ pmd_advanced_tests(&args);
+ pmd_huge_tests(&args);
+ pmd_populate_tests(&args);
spin_unlock(ptl);
- ptl = pud_lock(mm, pudp);
- pud_clear_tests(mm, pudp);
- pud_advanced_tests(mm, vma, pudp, pud_aligned, vaddr, prot);
- pud_huge_tests(pudp, pud_aligned, prot);
- pud_populate_tests(mm, pudp, saved_pmdp);
+ ptl = pud_lock(args.mm, args.pudp);
+ pud_clear_tests(&args);
+ pud_advanced_tests(&args);
+ pud_huge_tests(&args);
+ pud_populate_tests(&args);
spin_unlock(ptl);
- spin_lock(&mm->page_table_lock);
- p4d_clear_tests(mm, p4dp);
- pgd_clear_tests(mm, pgdp);
- p4d_populate_tests(mm, p4dp, saved_pudp);
- pgd_populate_tests(mm, pgdp, saved_p4dp);
- spin_unlock(&mm->page_table_lock);
-
- p4d_free(mm, saved_p4dp);
- pud_free(mm, saved_pudp);
- pmd_free(mm, saved_pmdp);
- pte_free(mm, saved_ptep);
-
- vm_area_free(vma);
- mm_dec_nr_puds(mm);
- mm_dec_nr_pmds(mm);
- mm_dec_nr_ptes(mm);
- mmdrop(mm);
+ spin_lock(&(args.mm->page_table_lock));
+ p4d_clear_tests(&args);
+ pgd_clear_tests(&args);
+ p4d_populate_tests(&args);
+ pgd_populate_tests(&args);
+ spin_unlock(&(args.mm->page_table_lock));
+
+ destroy_args(&args);
return 0;
}
late_initcall(debug_vm_pgtable);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 08:51:21 +0000