[PATCH V3 3/4] mm/debug_vm_pgtable: Add debug prints for individual tests
Anshuman Khandual
anshuman.khandual at arm.com
Mon Jun 15 13:37:56 AEST 2020
This adds debug print information that enlists all tests getting executed
on a given platform. With dynamic debug enabled, the following information
will be splashed during boot. For compactness purpose, dropped both time
stamp and prefix (i.e debug_vm_pgtable) from this sample output.
[debug_vm_pgtable ]: Validating architecture page table helpers
[pte_basic_tests ]: Validating PTE basic
[pmd_basic_tests ]: Validating PMD basic
[p4d_basic_tests ]: Validating P4D basic
[pgd_basic_tests ]: Validating PGD basic
[pte_clear_tests ]: Validating PTE clear
[pmd_clear_tests ]: Validating PMD clear
[pte_advanced_tests ]: Validating PTE advanced
[pmd_advanced_tests ]: Validating PMD advanced
[hugetlb_advanced_tests]: Validating HugeTLB advanced
[pmd_leaf_tests ]: Validating PMD leaf
[pmd_huge_tests ]: Validating PMD huge
[pte_savedwrite_tests ]: Validating PTE saved write
[pmd_savedwrite_tests ]: Validating PMD saved write
[pmd_populate_tests ]: Validating PMD populate
[pte_special_tests ]: Validating PTE special
[pte_protnone_tests ]: Validating PTE protnone
[pmd_protnone_tests ]: Validating PMD protnone
[pte_devmap_tests ]: Validating PTE devmap
[pmd_devmap_tests ]: Validating PMD devmap
[pte_swap_tests ]: Validating PTE swap
[swap_migration_tests ]: Validating swap migration
[hugetlb_basic_tests ]: Validating HugeTLB basic
[pmd_thp_tests ]: Validating PMD based THP
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: Mike Rapoport <rppt at linux.ibm.com>
Cc: Vineet Gupta <vgupta at synopsys.com>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: Heiko Carstens <heiko.carstens at de.ibm.com>
Cc: Vasily Gorbik <gor at linux.ibm.com>
Cc: Christian Borntraeger <borntraeger at de.ibm.com>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: Ingo Molnar <mingo at redhat.com>
Cc: Borislav Petkov <bp at alien8.de>
Cc: "H. Peter Anvin" <hpa at zytor.com>
Cc: Kirill A. Shutemov <kirill at shutemov.name>
Cc: Paul Walmsley <paul.walmsley at sifive.com>
Cc: Palmer Dabbelt <palmer at dabbelt.com>
Cc: linux-snps-arc at lists.infradead.org
Cc: linux-arm-kernel at lists.infradead.org
Cc: linuxppc-dev at lists.ozlabs.org
Cc: linux-s390 at vger.kernel.org
Cc: linux-riscv at lists.infradead.org
Cc: x86 at kernel.org
Cc: linux-mm at kvack.org
Cc: linux-arch at vger.kernel.org
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual at arm.com>
---
mm/debug_vm_pgtable.c | 46 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 45 insertions(+), 1 deletion(-)
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index e3f9f8317a98..536f3b1b3ad6 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -8,7 +8,7 @@
*
* Author: Anshuman Khandual <anshuman.khandual at arm.com>
*/
-#define pr_fmt(fmt) "debug_vm_pgtable: %s: " fmt, __func__
+#define pr_fmt(fmt) "debug_vm_pgtable: [%-25s]: " fmt, __func__
#include <linux/gfp.h>
#include <linux/highmem.h>
@@ -48,6 +48,7 @@ static void __init pte_basic_tests(unsigned long pfn, pgprot_t prot)
{
pte_t pte = pfn_pte(pfn, prot);
+ pr_debug("Validating PTE basic\n");
WARN_ON(!pte_same(pte, pte));
WARN_ON(!pte_young(pte_mkyoung(pte_mkold(pte))));
WARN_ON(!pte_dirty(pte_mkdirty(pte_mkclean(pte))));
@@ -63,6 +64,7 @@ static void __init pte_advanced_tests(struct mm_struct *mm,
{
pte_t pte = pfn_pte(pfn, prot);
+ pr_debug("Validating PTE advanced\n");
pte = pfn_pte(pfn, prot);
set_pte_at(mm, vaddr, ptep, pte);
ptep_set_wrprotect(mm, vaddr, ptep);
@@ -102,6 +104,7 @@ static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot)
{
pte_t pte = pfn_pte(pfn, prot);
+ pr_debug("Validating PTE saved write\n");
WARN_ON(!pte_savedwrite(pte_mk_savedwrite(pte_clear_savedwrite(pte))));
WARN_ON(pte_savedwrite(pte_clear_savedwrite(pte_mk_savedwrite(pte))));
}
@@ -113,6 +116,7 @@ static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot)
if (!has_transparent_hugepage())
return;
+ pr_debug("Validating PMD basic\n");
WARN_ON(!pmd_same(pmd, pmd));
WARN_ON(!pmd_young(pmd_mkyoung(pmd_mkold(pmd))));
WARN_ON(!pmd_dirty(pmd_mkdirty(pmd_mkclean(pmd))));
@@ -136,6 +140,7 @@ static void __init pmd_advanced_tests(struct mm_struct *mm,
if (!has_transparent_hugepage())
return;
+ pr_debug("Validating PMD advanced\n");
/* Align the address wrt HPAGE_PMD_SIZE */
vaddr = (vaddr & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE;
@@ -178,6 +183,7 @@ static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot)
{
pmd_t pmd = pfn_pmd(pfn, prot);
+ pr_debug("Validating PMD leaf\n");
/*
* PMD based THP is a leaf entry.
*/
@@ -191,6 +197,8 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
return;
+
+ pr_debug("Validating PMD huge\n");
/*
* X86 defined pmd_set_huge() verifies that the given
* PMD is not a populated non-leaf entry.
@@ -206,6 +214,7 @@ static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
{
pmd_t pmd = pfn_pmd(pfn, prot);
+ pr_debug("Validating PMD saved write\n");
WARN_ON(!pmd_savedwrite(pmd_mk_savedwrite(pmd_clear_savedwrite(pmd))));
WARN_ON(pmd_savedwrite(pmd_clear_savedwrite(pmd_mk_savedwrite(pmd))));
}
@@ -218,6 +227,7 @@ static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot)
if (!has_transparent_hugepage())
return;
+ pr_debug("Validating PUD basic\n");
WARN_ON(!pud_same(pud, pud));
WARN_ON(!pud_young(pud_mkyoung(pud_mkold(pud))));
WARN_ON(!pud_write(pud_mkwrite(pud_wrprotect(pud))));
@@ -243,6 +253,7 @@ static void pud_advanced_tests(struct mm_struct *mm,
if (!has_transparent_hugepage())
return;
+ pr_debug("Validating PUD advanced\n");
/* Align the address wrt HPAGE_PUD_SIZE */
vaddr = (vaddr & HPAGE_PUD_MASK) + HPAGE_PUD_SIZE;
@@ -285,6 +296,7 @@ static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot)
{
pud_t pud = pfn_pud(pfn, prot);
+ pr_debug("Validating PUD leaf\n");
/*
* PUD based THP is a leaf entry.
*/
@@ -298,6 +310,8 @@ static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
return;
+
+ pr_debug("Validating PUD huge\n");
/*
* X86 defined pud_set_huge() verifies that the given
* PUD is not a populated non-leaf entry.
@@ -348,6 +362,7 @@ static void __init p4d_basic_tests(unsigned long pfn, pgprot_t prot)
{
p4d_t p4d;
+ pr_debug("Validating P4D basic\n");
memset(&p4d, RANDOM_NZVALUE, sizeof(p4d_t));
WARN_ON(!p4d_same(p4d, p4d));
}
@@ -356,6 +371,7 @@ static void __init pgd_basic_tests(unsigned long pfn, pgprot_t prot)
{
pgd_t pgd;
+ pr_debug("Validating PGD basic\n");
memset(&pgd, RANDOM_NZVALUE, sizeof(pgd_t));
WARN_ON(!pgd_same(pgd, pgd));
}
@@ -368,6 +384,7 @@ static void __init pud_clear_tests(struct mm_struct *mm, pud_t *pudp)
if (mm_pmd_folded(mm))
return;
+ pr_debug("Validating PUD clear\n");
pud = __pud(pud_val(pud) | RANDOM_ORVALUE);
WRITE_ONCE(*pudp, pud);
pud_clear(pudp);
@@ -382,6 +399,8 @@ static void __init pud_populate_tests(struct mm_struct *mm, pud_t *pudp,
if (mm_pmd_folded(mm))
return;
+
+ pr_debug("Validating PUD populate\n");
/*
* This entry points to next level page table page.
* Hence this must not qualify as pud_bad().
@@ -408,6 +427,7 @@ static void __init p4d_clear_tests(struct mm_struct *mm, p4d_t *p4dp)
if (mm_pud_folded(mm))
return;
+ pr_debug("Validating P4D clear\n");
p4d = __p4d(p4d_val(p4d) | RANDOM_ORVALUE);
WRITE_ONCE(*p4dp, p4d);
p4d_clear(p4dp);
@@ -423,6 +443,7 @@ static void __init p4d_populate_tests(struct mm_struct *mm, p4d_t *p4dp,
if (mm_pud_folded(mm))
return;
+ pr_debug("Validating P4D populate\n");
/*
* This entry points to next level page table page.
* Hence this must not qualify as p4d_bad().
@@ -441,6 +462,7 @@ static void __init pgd_clear_tests(struct mm_struct *mm, pgd_t *pgdp)
if (mm_p4d_folded(mm))
return;
+ pr_debug("Validating PGD clear\n");
pgd = __pgd(pgd_val(pgd) | RANDOM_ORVALUE);
WRITE_ONCE(*pgdp, pgd);
pgd_clear(pgdp);
@@ -456,6 +478,7 @@ static void __init pgd_populate_tests(struct mm_struct *mm, pgd_t *pgdp,
if (mm_p4d_folded(mm))
return;
+ pr_debug("Validating PGD populate\n");
/*
* This entry points to next level page table page.
* Hence this must not qualify as pgd_bad().
@@ -484,6 +507,7 @@ static void __init pte_clear_tests(struct mm_struct *mm, pte_t *ptep,
{
pte_t pte = READ_ONCE(*ptep);
+ pr_debug("Validating PTE clear\n");
pte = __pte(pte_val(pte) | RANDOM_ORVALUE);
set_pte_at(mm, vaddr, ptep, pte);
barrier();
@@ -496,6 +520,7 @@ static void __init pmd_clear_tests(struct mm_struct *mm, pmd_t *pmdp)
{
pmd_t pmd = READ_ONCE(*pmdp);
+ pr_debug("Validating PMD clear\n");
pmd = __pmd(pmd_val(pmd) | RANDOM_ORVALUE);
WRITE_ONCE(*pmdp, pmd);
pmd_clear(pmdp);
@@ -508,6 +533,7 @@ static void __init pmd_populate_tests(struct mm_struct *mm, pmd_t *pmdp,
{
pmd_t pmd;
+ pr_debug("Validating PMD populate\n");
/*
* This entry points to next level page table page.
* Hence this must not qualify as pmd_bad().
@@ -525,6 +551,7 @@ static void __init pte_special_tests(unsigned long pfn, pgprot_t prot)
if (!IS_ENABLED(CONFIG_ARCH_HAS_PTE_SPECIAL))
return;
+ pr_debug("Validating PTE special\n");
WARN_ON(!pte_special(pte_mkspecial(pte)));
}
@@ -535,6 +562,7 @@ static void __init pte_protnone_tests(unsigned long pfn, pgprot_t prot)
if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
return;
+ pr_debug("Validating PTE protnone\n");
WARN_ON(!pte_protnone(pte));
WARN_ON(!pte_present(pte));
}
@@ -547,6 +575,7 @@ static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot)
if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
return;
+ pr_debug("Validating PMD protnone\n");
WARN_ON(!pmd_protnone(pmd));
WARN_ON(!pmd_present(pmd));
}
@@ -559,6 +588,7 @@ static void __init pte_devmap_tests(unsigned long pfn, pgprot_t prot)
{
pte_t pte = pfn_pte(pfn, prot);
+ pr_debug("Validating PTE devmap\n");
WARN_ON(!pte_devmap(pte_mkdevmap(pte)));
}
@@ -567,6 +597,7 @@ static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot)
{
pmd_t pmd = pfn_pmd(pfn, prot);
+ pr_debug("Validating PMD devmap\n");
WARN_ON(!pmd_devmap(pmd_mkdevmap(pmd)));
}
@@ -575,6 +606,7 @@ static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot)
{
pud_t pud = pfn_pud(pfn, prot);
+ pr_debug("Validating PUD devmap\n");
WARN_ON(!pud_devmap(pud_mkdevmap(pud)));
}
#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
@@ -597,6 +629,7 @@ static void __init pte_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
return;
+ pr_debug("Validating PTE soft dirty\n");
WARN_ON(!pte_soft_dirty(pte_mksoft_dirty(pte)));
WARN_ON(pte_soft_dirty(pte_clear_soft_dirty(pte)));
}
@@ -608,6 +641,7 @@ static void __init pte_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
return;
+ pr_debug("Validating PTE swap soft dirty\n");
WARN_ON(!pte_swp_soft_dirty(pte_swp_mksoft_dirty(pte)));
WARN_ON(pte_swp_soft_dirty(pte_swp_clear_soft_dirty(pte)));
}
@@ -620,6 +654,7 @@ static void __init pmd_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
return;
+ pr_debug("Validating PMD soft dirty\n");
WARN_ON(!pmd_soft_dirty(pmd_mksoft_dirty(pmd)));
WARN_ON(pmd_soft_dirty(pmd_clear_soft_dirty(pmd)));
}
@@ -632,6 +667,7 @@ static void __init pmd_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
!IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION))
return;
+ pr_debug("Validating PMD swap soft dirty\n");
WARN_ON(!pmd_swp_soft_dirty(pmd_swp_mksoft_dirty(pmd)));
WARN_ON(pmd_swp_soft_dirty(pmd_swp_clear_soft_dirty(pmd)));
}
@@ -647,6 +683,7 @@ static void __init pte_swap_tests(unsigned long pfn, pgprot_t prot)
swp_entry_t swp;
pte_t pte;
+ pr_debug("Validating PTE swap\n");
pte = pfn_pte(pfn, prot);
swp = __pte_to_swp_entry(pte);
pte = __swp_entry_to_pte(swp);
@@ -659,6 +696,7 @@ static void __init pmd_swap_tests(unsigned long pfn, pgprot_t prot)
swp_entry_t swp;
pmd_t pmd;
+ pr_debug("Validating PMD swap\n");
pmd = pfn_pmd(pfn, prot);
swp = __pmd_to_swp_entry(pmd);
pmd = __swp_entry_to_pmd(swp);
@@ -675,6 +713,8 @@ 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
@@ -714,6 +754,7 @@ static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot)
struct page *page;
pte_t pte;
+ pr_debug("Validating HugeTLB basic\n");
/*
* Accessing the page associated with the pfn is safe here,
* as it was previously derived from a real kernel symbol.
@@ -741,6 +782,7 @@ static void __init hugetlb_advanced_tests(struct mm_struct *mm,
pte_t pte = READ_ONCE(*ptep);
unsigned long paddr = (__pfn_to_phys(pfn) | RANDOM_ORVALUE) & PMD_MASK;
+ pr_debug("Validating HugeTLB advanced\n");
pte = pte_mkhuge(mk_pte(pfn_to_page(PHYS_PFN(paddr)), prot));
set_huge_pte_at(mm, vaddr, ptep, pte);
barrier();
@@ -791,6 +833,7 @@ static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
if (!has_transparent_hugepage())
return;
+ pr_debug("Validating PMD based THP\n");
/*
* pmd_trans_huge() and pmd_present() must return positive after
* MMU invalidation with pmd_mkinvalid(). This behavior is an
@@ -819,6 +862,7 @@ static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
if (!has_transparent_hugepage())
return;
+ pr_debug("Validating PUD based THP\n");
pud = pfn_pud(pfn, prot);
WARN_ON(!pud_trans_huge(pud_mkhuge(pud)));
--
2.20.1
More information about the Linuxppc-dev
mailing list