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mm/debug_vm_pgtable: add debug prints for individual tests
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 Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Vineet Gupta <vgupta@synopsys.com> [arc] Reviewed-by: Zi Yan <ziy@nvidia.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Mike Rapoport <rppt@linux.ibm.com> Cc: Vineet Gupta <vgupta@synopsys.com> Cc: Will Deacon <will@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Kirill A. Shutemov <kirill@shutemov.name> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Mike Rapoport <rppt@kernel.org> Link: http://lkml.kernel.org/r/1593996516-7186-4-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Anshuman Khandual
Linus Torvalds
parent
a5c3b9ffb0
commit
6315df41af
@ -8,7 +8,7 @@
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*
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* Author: Anshuman Khandual <anshuman.khandual@arm.com>
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*/
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#define pr_fmt(fmt) "debug_vm_pgtable: %s: " fmt, __func__
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#define pr_fmt(fmt) "debug_vm_pgtable: [%-25s]: " fmt, __func__
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#include <linux/gfp.h>
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#include <linux/highmem.h>
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@ -48,6 +48,7 @@ static void __init pte_basic_tests(unsigned long pfn, pgprot_t prot)
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{
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pte_t pte = pfn_pte(pfn, prot);
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pr_debug("Validating PTE basic\n");
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WARN_ON(!pte_same(pte, pte));
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WARN_ON(!pte_young(pte_mkyoung(pte_mkold(pte))));
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WARN_ON(!pte_dirty(pte_mkdirty(pte_mkclean(pte))));
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@ -64,6 +65,7 @@ static void __init pte_advanced_tests(struct mm_struct *mm,
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{
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pte_t pte = pfn_pte(pfn, prot);
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pr_debug("Validating PTE advanced\n");
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pte = pfn_pte(pfn, prot);
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set_pte_at(mm, vaddr, ptep, pte);
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ptep_set_wrprotect(mm, vaddr, ptep);
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@ -103,6 +105,7 @@ static void __init pte_savedwrite_tests(unsigned long pfn, pgprot_t prot)
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{
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pte_t pte = pfn_pte(pfn, prot);
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pr_debug("Validating PTE saved write\n");
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WARN_ON(!pte_savedwrite(pte_mk_savedwrite(pte_clear_savedwrite(pte))));
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WARN_ON(pte_savedwrite(pte_clear_savedwrite(pte_mk_savedwrite(pte))));
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}
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@ -114,6 +117,7 @@ static void __init pmd_basic_tests(unsigned long pfn, pgprot_t prot)
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if (!has_transparent_hugepage())
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return;
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pr_debug("Validating PMD basic\n");
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WARN_ON(!pmd_same(pmd, pmd));
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WARN_ON(!pmd_young(pmd_mkyoung(pmd_mkold(pmd))));
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WARN_ON(!pmd_dirty(pmd_mkdirty(pmd_mkclean(pmd))));
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@ -138,6 +142,7 @@ static void __init pmd_advanced_tests(struct mm_struct *mm,
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if (!has_transparent_hugepage())
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return;
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pr_debug("Validating PMD advanced\n");
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/* Align the address wrt HPAGE_PMD_SIZE */
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vaddr = (vaddr & HPAGE_PMD_MASK) + HPAGE_PMD_SIZE;
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@ -180,6 +185,7 @@ static void __init pmd_leaf_tests(unsigned long pfn, pgprot_t prot)
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{
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pmd_t pmd = pfn_pmd(pfn, prot);
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pr_debug("Validating PMD leaf\n");
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/*
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* PMD based THP is a leaf entry.
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*/
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@ -193,6 +199,8 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
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if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
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return;
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pr_debug("Validating PMD huge\n");
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/*
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* X86 defined pmd_set_huge() verifies that the given
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* PMD is not a populated non-leaf entry.
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@ -208,6 +216,7 @@ static void __init pmd_savedwrite_tests(unsigned long pfn, pgprot_t prot)
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{
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pmd_t pmd = pfn_pmd(pfn, prot);
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pr_debug("Validating PMD saved write\n");
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WARN_ON(!pmd_savedwrite(pmd_mk_savedwrite(pmd_clear_savedwrite(pmd))));
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WARN_ON(pmd_savedwrite(pmd_clear_savedwrite(pmd_mk_savedwrite(pmd))));
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}
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@ -220,6 +229,7 @@ static void __init pud_basic_tests(unsigned long pfn, pgprot_t prot)
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if (!has_transparent_hugepage())
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return;
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pr_debug("Validating PUD basic\n");
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WARN_ON(!pud_same(pud, pud));
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WARN_ON(!pud_young(pud_mkyoung(pud_mkold(pud))));
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WARN_ON(!pud_write(pud_mkwrite(pud_wrprotect(pud))));
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@ -246,6 +256,7 @@ static void __init pud_advanced_tests(struct mm_struct *mm,
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if (!has_transparent_hugepage())
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return;
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pr_debug("Validating PUD advanced\n");
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/* Align the address wrt HPAGE_PUD_SIZE */
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vaddr = (vaddr & HPAGE_PUD_MASK) + HPAGE_PUD_SIZE;
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@ -288,6 +299,7 @@ static void __init pud_leaf_tests(unsigned long pfn, pgprot_t prot)
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{
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pud_t pud = pfn_pud(pfn, prot);
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pr_debug("Validating PUD leaf\n");
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/*
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* PUD based THP is a leaf entry.
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*/
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@ -301,6 +313,8 @@ static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
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if (!IS_ENABLED(CONFIG_HAVE_ARCH_HUGE_VMAP))
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return;
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pr_debug("Validating PUD huge\n");
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/*
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* X86 defined pud_set_huge() verifies that the given
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* PUD is not a populated non-leaf entry.
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@ -354,6 +368,7 @@ static void __init p4d_basic_tests(unsigned long pfn, pgprot_t prot)
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{
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p4d_t p4d;
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pr_debug("Validating P4D basic\n");
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memset(&p4d, RANDOM_NZVALUE, sizeof(p4d_t));
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WARN_ON(!p4d_same(p4d, p4d));
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}
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@ -362,6 +377,7 @@ static void __init pgd_basic_tests(unsigned long pfn, pgprot_t prot)
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{
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pgd_t pgd;
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pr_debug("Validating PGD basic\n");
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memset(&pgd, RANDOM_NZVALUE, sizeof(pgd_t));
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WARN_ON(!pgd_same(pgd, pgd));
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}
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@ -374,6 +390,7 @@ static void __init pud_clear_tests(struct mm_struct *mm, pud_t *pudp)
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if (mm_pmd_folded(mm))
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return;
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pr_debug("Validating PUD clear\n");
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pud = __pud(pud_val(pud) | RANDOM_ORVALUE);
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WRITE_ONCE(*pudp, pud);
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pud_clear(pudp);
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@ -388,6 +405,8 @@ static void __init pud_populate_tests(struct mm_struct *mm, pud_t *pudp,
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if (mm_pmd_folded(mm))
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return;
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pr_debug("Validating PUD populate\n");
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/*
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* This entry points to next level page table page.
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* Hence this must not qualify as pud_bad().
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@ -414,6 +433,7 @@ static void __init p4d_clear_tests(struct mm_struct *mm, p4d_t *p4dp)
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if (mm_pud_folded(mm))
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return;
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pr_debug("Validating P4D clear\n");
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p4d = __p4d(p4d_val(p4d) | RANDOM_ORVALUE);
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WRITE_ONCE(*p4dp, p4d);
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p4d_clear(p4dp);
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@ -429,6 +449,7 @@ static void __init p4d_populate_tests(struct mm_struct *mm, p4d_t *p4dp,
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if (mm_pud_folded(mm))
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return;
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pr_debug("Validating P4D populate\n");
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/*
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* This entry points to next level page table page.
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* Hence this must not qualify as p4d_bad().
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@ -447,6 +468,7 @@ static void __init pgd_clear_tests(struct mm_struct *mm, pgd_t *pgdp)
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if (mm_p4d_folded(mm))
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return;
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pr_debug("Validating PGD clear\n");
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pgd = __pgd(pgd_val(pgd) | RANDOM_ORVALUE);
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WRITE_ONCE(*pgdp, pgd);
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pgd_clear(pgdp);
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@ -462,6 +484,7 @@ static void __init pgd_populate_tests(struct mm_struct *mm, pgd_t *pgdp,
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if (mm_p4d_folded(mm))
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return;
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pr_debug("Validating PGD populate\n");
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/*
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* This entry points to next level page table page.
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* Hence this must not qualify as pgd_bad().
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@ -490,6 +513,7 @@ static void __init pte_clear_tests(struct mm_struct *mm, pte_t *ptep,
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{
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pte_t pte = ptep_get(ptep);
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pr_debug("Validating PTE clear\n");
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pte = __pte(pte_val(pte) | RANDOM_ORVALUE);
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set_pte_at(mm, vaddr, ptep, pte);
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barrier();
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@ -502,6 +526,7 @@ static void __init pmd_clear_tests(struct mm_struct *mm, pmd_t *pmdp)
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{
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pmd_t pmd = READ_ONCE(*pmdp);
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pr_debug("Validating PMD clear\n");
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pmd = __pmd(pmd_val(pmd) | RANDOM_ORVALUE);
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WRITE_ONCE(*pmdp, pmd);
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pmd_clear(pmdp);
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@ -514,6 +539,7 @@ static void __init pmd_populate_tests(struct mm_struct *mm, pmd_t *pmdp,
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{
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pmd_t pmd;
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pr_debug("Validating PMD populate\n");
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/*
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* This entry points to next level page table page.
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* Hence this must not qualify as pmd_bad().
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@ -531,6 +557,7 @@ static void __init pte_special_tests(unsigned long pfn, pgprot_t prot)
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if (!IS_ENABLED(CONFIG_ARCH_HAS_PTE_SPECIAL))
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return;
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pr_debug("Validating PTE special\n");
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WARN_ON(!pte_special(pte_mkspecial(pte)));
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}
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@ -541,6 +568,7 @@ static void __init pte_protnone_tests(unsigned long pfn, pgprot_t prot)
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if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
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return;
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pr_debug("Validating PTE protnone\n");
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WARN_ON(!pte_protnone(pte));
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WARN_ON(!pte_present(pte));
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}
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@ -553,6 +581,7 @@ static void __init pmd_protnone_tests(unsigned long pfn, pgprot_t prot)
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if (!IS_ENABLED(CONFIG_NUMA_BALANCING))
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return;
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pr_debug("Validating PMD protnone\n");
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WARN_ON(!pmd_protnone(pmd));
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WARN_ON(!pmd_present(pmd));
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}
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@ -565,6 +594,7 @@ static void __init pte_devmap_tests(unsigned long pfn, pgprot_t prot)
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{
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pte_t pte = pfn_pte(pfn, prot);
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pr_debug("Validating PTE devmap\n");
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WARN_ON(!pte_devmap(pte_mkdevmap(pte)));
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}
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@ -573,6 +603,7 @@ static void __init pmd_devmap_tests(unsigned long pfn, pgprot_t prot)
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{
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pmd_t pmd = pfn_pmd(pfn, prot);
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pr_debug("Validating PMD devmap\n");
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WARN_ON(!pmd_devmap(pmd_mkdevmap(pmd)));
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}
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@ -581,6 +612,7 @@ static void __init pud_devmap_tests(unsigned long pfn, pgprot_t prot)
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{
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pud_t pud = pfn_pud(pfn, prot);
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pr_debug("Validating PUD devmap\n");
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WARN_ON(!pud_devmap(pud_mkdevmap(pud)));
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}
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#else /* !CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD */
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@ -603,6 +635,7 @@ static void __init pte_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
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if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
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return;
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pr_debug("Validating PTE soft dirty\n");
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WARN_ON(!pte_soft_dirty(pte_mksoft_dirty(pte)));
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WARN_ON(pte_soft_dirty(pte_clear_soft_dirty(pte)));
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}
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@ -614,6 +647,7 @@ static void __init pte_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
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if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
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return;
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pr_debug("Validating PTE swap soft dirty\n");
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WARN_ON(!pte_swp_soft_dirty(pte_swp_mksoft_dirty(pte)));
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WARN_ON(pte_swp_soft_dirty(pte_swp_clear_soft_dirty(pte)));
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}
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@ -626,6 +660,7 @@ static void __init pmd_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
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if (!IS_ENABLED(CONFIG_MEM_SOFT_DIRTY))
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return;
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pr_debug("Validating PMD soft dirty\n");
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WARN_ON(!pmd_soft_dirty(pmd_mksoft_dirty(pmd)));
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WARN_ON(pmd_soft_dirty(pmd_clear_soft_dirty(pmd)));
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}
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@ -638,6 +673,7 @@ static void __init pmd_swap_soft_dirty_tests(unsigned long pfn, pgprot_t prot)
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!IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION))
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return;
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pr_debug("Validating PMD swap soft dirty\n");
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WARN_ON(!pmd_swp_soft_dirty(pmd_swp_mksoft_dirty(pmd)));
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WARN_ON(pmd_swp_soft_dirty(pmd_swp_clear_soft_dirty(pmd)));
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}
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@ -653,6 +689,7 @@ static void __init pte_swap_tests(unsigned long pfn, pgprot_t prot)
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swp_entry_t swp;
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pte_t pte;
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pr_debug("Validating PTE swap\n");
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pte = pfn_pte(pfn, prot);
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swp = __pte_to_swp_entry(pte);
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pte = __swp_entry_to_pte(swp);
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@ -665,6 +702,7 @@ static void __init pmd_swap_tests(unsigned long pfn, pgprot_t prot)
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swp_entry_t swp;
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pmd_t pmd;
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pr_debug("Validating PMD swap\n");
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pmd = pfn_pmd(pfn, prot);
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swp = __pmd_to_swp_entry(pmd);
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pmd = __swp_entry_to_pmd(swp);
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@ -681,6 +719,8 @@ static void __init swap_migration_tests(void)
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if (!IS_ENABLED(CONFIG_MIGRATION))
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return;
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pr_debug("Validating swap migration\n");
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/*
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* swap_migration_tests() requires a dedicated page as it needs to
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* be locked before creating a migration entry from it. Locking the
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@ -720,6 +760,7 @@ static void __init hugetlb_basic_tests(unsigned long pfn, pgprot_t prot)
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struct page *page;
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pte_t pte;
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pr_debug("Validating HugeTLB basic\n");
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/*
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* Accessing the page associated with the pfn is safe here,
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* as it was previously derived from a real kernel symbol.
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@ -747,6 +788,7 @@ static void __init hugetlb_advanced_tests(struct mm_struct *mm,
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pte_t pte = ptep_get(ptep);
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unsigned long paddr = __pfn_to_phys(pfn) & PMD_MASK;
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pr_debug("Validating HugeTLB advanced\n");
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pte = pte_mkhuge(mk_pte(pfn_to_page(PHYS_PFN(paddr)), prot));
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set_huge_pte_at(mm, vaddr, ptep, pte);
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barrier();
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@ -797,6 +839,7 @@ static void __init pmd_thp_tests(unsigned long pfn, pgprot_t prot)
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if (!has_transparent_hugepage())
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return;
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pr_debug("Validating PMD based THP\n");
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/*
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* pmd_trans_huge() and pmd_present() must return positive after
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* MMU invalidation with pmd_mkinvalid(). This behavior is an
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@ -825,6 +868,7 @@ static void __init pud_thp_tests(unsigned long pfn, pgprot_t prot)
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if (!has_transparent_hugepage())
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return;
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pr_debug("Validating PUD based THP\n");
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pud = pfn_pud(pfn, prot);
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WARN_ON(!pud_trans_huge(pud_mkhuge(pud)));
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