* + mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch added to -mm tree
@ 2021-08-09 18:07 akpm
0 siblings, 0 replies; 4+ messages in thread
From: akpm @ 2021-08-09 18:07 UTC (permalink / raw)
To: mm-commits, will, vgupta, gerald.schaefer, chuhu,
christophe.leroy, catalin.marinas, cai, anshuman.khandual,
aneesh.kumar, gshan
The patch titled
Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests
has been added to the -mm tree. Its filename is
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Gavin Shan <gshan@redhat.com>
Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests
This uses struct pgtable_debug_args in PUD modifying tests. The allocated
huge page is used when set_pud_at() is used. The corresponding tests are
skipped if the huge page doesn't exist. Besides, the following unused
variables in debug_vm_pgtable() are dropped: @prot, @paddr, @pud_aligned.
Link: https://lkml.kernel.org/r/20210809092631.1888748-10-gshan@redhat.com
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Tested-by: Christophe Leroy <christophe.leroy@csgroup.eu> [powerpc 8xx]
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chunyu Hu <chuhu@redhat.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/debug_vm_pgtable.c | 126 +++++++++++++++-------------------------
1 file changed, 48 insertions(+), 78 deletions(-)
--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests
+++ a/mm/debug_vm_pgtable.c
@@ -337,55 +337,56 @@ static void __init pud_basic_tests(struc
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)
{
+ unsigned long vaddr = args->vaddr;
pud_t pud;
if (!has_transparent_hugepage())
return;
+ if (args->pud_pfn == ULONG_MAX)
+ return;
+
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);
+ 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);
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);
+ 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(struct pgtable_debug_args *args)
@@ -405,24 +406,14 @@ static void __init pud_leaf_tests(struct
}
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
static void __init pud_basic_tests(struct pgtable_debug_args *args, 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_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(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 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) { }
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) { }
@@ -448,11 +439,11 @@ static void __init pmd_huge_tests(struct
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");
@@ -460,15 +451,15 @@ static void __init pud_huge_tests(pud_t
* 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(struct pgtable_debug_args *args) { }
-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) { }
#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
static void __init p4d_basic_tests(struct pgtable_debug_args *args)
@@ -490,27 +481,26 @@ static void __init pgd_basic_tests(struc
}
#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");
@@ -518,16 +508,13 @@ static void __init pud_populate_tests(st
* 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
@@ -1217,10 +1204,7 @@ static int __init debug_vm_pgtable(void)
pud_t *pudp, *saved_pudp;
pmd_t *pmdp, *saved_pmdp, pmd;
pgtable_t saved_ptep;
- pgprot_t prot;
- phys_addr_t paddr;
unsigned long vaddr;
- unsigned long pud_aligned;
spinlock_t *ptl = NULL;
int idx, ret;
@@ -1229,7 +1213,6 @@ static int __init debug_vm_pgtable(void)
if (ret)
return ret;
- prot = vm_get_page_prot(VMFLAGS);
vaddr = get_random_vaddr();
mm = mm_alloc();
if (!mm) {
@@ -1243,19 +1226,6 @@ static int __init debug_vm_pgtable(void)
return 1;
}
- /*
- * PFN for mapping at PTE level is determined from a standard kernel
- * text symbol. But pfns for higher page table levels are derived by
- * masking lower bits of this real pfn. These derived pfns might not
- * 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.
- */
- paddr = __pa_symbol(&start_kernel);
-
- pud_aligned = (paddr & PUD_MASK) >> PAGE_SHIFT;
-
pgdp = pgd_offset(mm, vaddr);
p4dp = p4d_alloc(mm, pgdp, vaddr);
pudp = pud_alloc(mm, p4dp, vaddr);
@@ -1348,11 +1318,11 @@ static int __init debug_vm_pgtable(void)
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);
_
Patches currently in -mm which might be from gshan@redhat.com are
mm-debug_vm_pgtable-introduce-struct-pgtable_debug_args.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-basic-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-leaf-and-savewrite-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-protnone-and-devmap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-soft_dirty-and-swap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-migration-and-thp-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pte-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pmd-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pgd-and-p4d-modifying-tests.patch
mm-debug_vm_pgtable-remove-unused-code.patch
mm-debug_vm_pgtable-fix-corrupted-page-flag.patch
^ permalink raw reply [flat|nested] 4+ messages in thread
* + mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch added to -mm tree
@ 2021-08-02 20:59 akpm
0 siblings, 0 replies; 4+ messages in thread
From: akpm @ 2021-08-02 20:59 UTC (permalink / raw)
To: mm-commits, will, vgupta, gerald.schaefer, chuhu,
christophe.leroy, catalin.marinas, cai, anshuman.khandual,
aneesh.kumar, gshan
The patch titled
Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests
has been added to the -mm tree. Its filename is
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Gavin Shan <gshan@redhat.com>
Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests
This uses struct pgtable_debug_args in PUD modifying tests. The allocated
huge page is used when set_pud_at() is used. The corresponding tests are
skipped if the huge page doesn't exist. Besides, the following unused
variables in debug_vm_pgtable() are dropped: @prot, @paddr, @pud_aligned.
Link: https://lkml.kernel.org/r/20210802060419.1360913-10-gshan@redhat.com
Signed-off-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Chunyu Hu <chuhu@redhat.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/debug_vm_pgtable.c | 126 +++++++++++++++-------------------------
1 file changed, 48 insertions(+), 78 deletions(-)
--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests
+++ a/mm/debug_vm_pgtable.c
@@ -337,55 +337,56 @@ static void __init pud_basic_tests(struc
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)
{
+ unsigned long vaddr = args->vaddr;
pud_t pud;
if (!has_transparent_hugepage())
return;
+ if (args->pud_pfn == ULONG_MAX)
+ return;
+
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);
+ 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);
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);
+ 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(struct pgtable_debug_args *args)
@@ -405,24 +406,14 @@ static void __init pud_leaf_tests(struct
}
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
static void __init pud_basic_tests(struct pgtable_debug_args *args, 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_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(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 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) { }
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) { }
@@ -448,11 +439,11 @@ static void __init pmd_huge_tests(struct
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");
@@ -460,15 +451,15 @@ static void __init pud_huge_tests(pud_t
* 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(struct pgtable_debug_args *args) { }
-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) { }
#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
static void __init p4d_basic_tests(struct pgtable_debug_args *args)
@@ -490,27 +481,26 @@ static void __init pgd_basic_tests(struc
}
#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");
@@ -518,16 +508,13 @@ static void __init pud_populate_tests(st
* 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
@@ -1217,10 +1204,7 @@ static int __init debug_vm_pgtable(void)
pmd_t *pmdp, *saved_pmdp, pmd;
pte_t *ptep;
pgtable_t saved_ptep;
- pgprot_t prot;
- phys_addr_t paddr;
unsigned long vaddr;
- unsigned long pud_aligned;
spinlock_t *ptl = NULL;
int idx, ret;
@@ -1229,7 +1213,6 @@ static int __init debug_vm_pgtable(void)
if (ret)
return ret;
- prot = vm_get_page_prot(VMFLAGS);
vaddr = get_random_vaddr();
mm = mm_alloc();
if (!mm) {
@@ -1243,19 +1226,6 @@ static int __init debug_vm_pgtable(void)
return 1;
}
- /*
- * PFN for mapping at PTE level is determined from a standard kernel
- * text symbol. But pfns for higher page table levels are derived by
- * masking lower bits of this real pfn. These derived pfns might not
- * 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.
- */
- paddr = __pa_symbol(&start_kernel);
-
- pud_aligned = (paddr & PUD_MASK) >> PAGE_SHIFT;
-
pgdp = pgd_offset(mm, vaddr);
p4dp = p4d_alloc(mm, pgdp, vaddr);
pudp = pud_alloc(mm, p4dp, vaddr);
@@ -1348,11 +1318,11 @@ static int __init debug_vm_pgtable(void)
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);
_
Patches currently in -mm which might be from gshan@redhat.com are
mm-debug_vm_pgtable-introduce-struct-pgtable_debug_args.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-basic-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-leaf-and-savewrite-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-protnone-and-devmap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-soft_dirty-and-swap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-migration-and-thp-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pte-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pmd-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pgd-and-p4d-modifying-tests.patch
mm-debug_vm_pgtable-remove-unused-code.patch
mm-debug_vm_pgtable-fix-corrupted-page-flag.patch
^ permalink raw reply [flat|nested] 4+ messages in thread
* + mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch added to -mm tree
@ 2021-07-27 20:52 akpm
0 siblings, 0 replies; 4+ messages in thread
From: akpm @ 2021-07-27 20:52 UTC (permalink / raw)
To: mm-commits, will, gerald.schaefer, chuhu, christophe.leroy,
catalin.marinas, cai, anshuman.khandual, aneesh.kumar, gshan
The patch titled
Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests
has been added to the -mm tree. Its filename is
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Gavin Shan <gshan@redhat.com>
Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests
This uses struct pgtable_debug_args in PUD modifying tests. The allocated
huge page is used when set_pud_at() is used. The corresponding tests are
skipped if the huge page doesn't exist. Besides, the following unused
variables in debug_vm_pgtable() are dropped: @prot, @paddr, @pud_aligned.
Link: https://lkml.kernel.org/r/20210727061401.592616-10-gshan@redhat.com
Signed-off-by: Gavin Shan <gshan@redhat.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Chunyu Hu <chuhu@redhat.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Qian Cai <cai@lca.pw>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/debug_vm_pgtable.c | 126 +++++++++++++++-------------------------
1 file changed, 48 insertions(+), 78 deletions(-)
--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests
+++ a/mm/debug_vm_pgtable.c
@@ -337,55 +337,56 @@ static void __init pud_basic_tests(struc
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)
{
+ unsigned long vaddr = args->vaddr;
pud_t pud;
if (!has_transparent_hugepage())
return;
+ if (args->pud_pfn == ULONG_MAX)
+ return;
+
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);
+ 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);
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);
+ 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(struct pgtable_debug_args *args)
@@ -405,24 +406,14 @@ static void __init pud_leaf_tests(struct
}
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
static void __init pud_basic_tests(struct pgtable_debug_args *args, 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_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(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 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) { }
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) { }
@@ -448,11 +439,11 @@ static void __init pmd_huge_tests(struct
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");
@@ -460,15 +451,15 @@ static void __init pud_huge_tests(pud_t
* 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(struct pgtable_debug_args *args) { }
-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) { }
#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
static void __init p4d_basic_tests(struct pgtable_debug_args *args)
@@ -490,27 +481,26 @@ static void __init pgd_basic_tests(struc
}
#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");
@@ -518,16 +508,13 @@ static void __init pud_populate_tests(st
* 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
@@ -1230,10 +1217,7 @@ static int __init debug_vm_pgtable(void)
pmd_t *pmdp, *saved_pmdp, pmd;
pte_t *ptep;
pgtable_t saved_ptep;
- pgprot_t prot;
- phys_addr_t paddr;
unsigned long vaddr;
- unsigned long pud_aligned;
spinlock_t *ptl = NULL;
int idx, ret;
@@ -1242,7 +1226,6 @@ static int __init debug_vm_pgtable(void)
if (ret)
return ret;
- prot = vm_get_page_prot(VMFLAGS);
vaddr = get_random_vaddr();
mm = mm_alloc();
if (!mm) {
@@ -1256,19 +1239,6 @@ static int __init debug_vm_pgtable(void)
return 1;
}
- /*
- * PFN for mapping at PTE level is determined from a standard kernel
- * text symbol. But pfns for higher page table levels are derived by
- * masking lower bits of this real pfn. These derived pfns might not
- * 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.
- */
- paddr = __pa_symbol(&start_kernel);
-
- pud_aligned = (paddr & PUD_MASK) >> PAGE_SHIFT;
-
pgdp = pgd_offset(mm, vaddr);
p4dp = p4d_alloc(mm, pgdp, vaddr);
pudp = pud_alloc(mm, p4dp, vaddr);
@@ -1361,11 +1331,11 @@ static int __init debug_vm_pgtable(void)
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);
_
Patches currently in -mm which might be from gshan@redhat.com are
mm-debug_vm_pgtable-introduce-struct-pgtable_debug_args.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-basic-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-leaf-and-savewrite-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-protnone-and-devmap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-soft_dirty-and-swap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-migration-and-thp-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pte-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pmd-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pgd-and-p4d-modifying-tests.patch
mm-debug_vm_pgtable-remove-unused-code.patch
mm-debug_vm_pgtable-fix-corrupted-page-flag.patch
^ permalink raw reply [flat|nested] 4+ messages in thread
* + mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch added to -mm tree
@ 2021-07-20 22:14 akpm
0 siblings, 0 replies; 4+ messages in thread
From: akpm @ 2021-07-20 22:14 UTC (permalink / raw)
To: mm-commits, will, catalin.marinas, anshuman.khandual, gshan
The patch titled
Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests
has been added to the -mm tree. Its filename is
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Gavin Shan <gshan@redhat.com>
Subject: mm/debug_vm_pgtable: use struct pgtable_debug_args in PUD modifying tests
This uses struct pgtable_debug_args in PUD modifying tests. The allocated
huge page is used when set_pud_at() is used. The corresponding tests are
skipped if the huge page doesn't exist. Besides, the following unused
variables in debug_vm_pgtable() are dropped: @prot, @paddr, @pud_aligned.
Link: https://lkml.kernel.org/r/20210719130613.334901-10-gshan@redhat.com
Signed-off-by: Gavin Shan <gshan@redhat.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
mm/debug_vm_pgtable.c | 130 +++++++++++++++-------------------------
1 file changed, 50 insertions(+), 80 deletions(-)
--- a/mm/debug_vm_pgtable.c~mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests
+++ a/mm/debug_vm_pgtable.c
@@ -338,55 +338,55 @@ static void __init pud_basic_tests(struc
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)
{
+ unsigned long vaddr = (args->vaddr & HPAGE_PUD_MASK);
pud_t pud;
if (!has_transparent_hugepage())
return;
pr_debug("Validating PUD advanced\n");
- /* Align the address wrt HPAGE_PUD_SIZE */
- vaddr &= HPAGE_PUD_MASK;
+ if (args->pud_pfn == ULONG_MAX) {
+ pr_debug("%s: Skipped\n", __func__);
+ return;
+ }
- 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);
+ 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);
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);
+ 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(struct pgtable_debug_args *args)
@@ -406,24 +406,14 @@ static void __init pud_leaf_tests(struct
}
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
static void __init pud_basic_tests(struct pgtable_debug_args *args, 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_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(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 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) { }
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) { }
@@ -450,11 +440,11 @@ static void __init pmd_huge_tests(struct
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");
@@ -462,15 +452,16 @@ static void __init pud_huge_tests(pud_t
* 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(struct pgtable_debug_args *args) { }
-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) { }
#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
static void __init p4d_basic_tests(void)
@@ -492,27 +483,26 @@ static void __init pgd_basic_tests(void)
}
#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");
@@ -520,16 +510,13 @@ static void __init pud_populate_tests(st
* 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
@@ -1152,10 +1139,7 @@ static int __init debug_vm_pgtable(void)
pud_t *pudp, *saved_pudp;
pmd_t *pmdp, *saved_pmdp, pmd;
pgtable_t saved_ptep;
- pgprot_t prot;
- phys_addr_t paddr;
unsigned long vaddr;
- unsigned long pud_aligned;
spinlock_t *ptl = NULL;
int idx, ret;
@@ -1164,7 +1148,6 @@ static int __init debug_vm_pgtable(void)
if (ret)
return ret;
- prot = vm_get_page_prot(VMFLAGS);
vaddr = get_random_vaddr();
mm = mm_alloc();
if (!mm) {
@@ -1178,19 +1161,6 @@ static int __init debug_vm_pgtable(void)
return 1;
}
- /*
- * PFN for mapping at PTE level is determined from a standard kernel
- * text symbol. But pfns for higher page table levels are derived by
- * masking lower bits of this real pfn. These derived pfns might not
- * 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.
- */
- paddr = __pa_symbol(&start_kernel);
-
- pud_aligned = (paddr & PUD_MASK) >> PAGE_SHIFT;
-
pgdp = pgd_offset(mm, vaddr);
p4dp = p4d_alloc(mm, pgdp, vaddr);
pudp = pud_alloc(mm, p4dp, vaddr);
@@ -1282,11 +1252,11 @@ static int __init debug_vm_pgtable(void)
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);
_
Patches currently in -mm which might be from gshan@redhat.com are
mm-debug_vm_pgtable-introduce-struct-pgtable_debug_args.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-basic-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-leaf-and-savewrite-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-protnone-and-devmap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-soft_dirty-and-swap-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-migration-and-thp-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pte-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pmd-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pud-modifying-tests.patch
mm-debug_vm_pgtable-use-struct-pgtable_debug_args-in-pgd-and-p4d-modifying-tests.patch
mm-debug_vm_pgtable-remove-unused-code.patch
mm-debug_vm_pgtable-fix-corrupted-page-flag.patch
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-08-02 20:59 akpm
2021-07-27 20:52 akpm
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