diff options
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/book3s64/pgtable.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/mm/pgtable.c | 16 | ||||
| -rw-r--r-- | arch/powerpc/mm/ptdump/hashpagetable.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/mm/ptdump/ptdump.c | 6 |
4 files changed, 19 insertions, 12 deletions
diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index a255707e4aee..01bc9663360d 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -112,6 +112,9 @@ pmd_t pmdp_invalidate(struct vm_area_struct *vma, unsigned long address, /* * This ensures that generic code that rely on IRQ disabling * to prevent a parallel THP split work as expected. + * + * Marking the entry with _PAGE_INVALID && ~_PAGE_PRESENT requires + * a special case check in pmd_access_permitted. */ serialize_against_pte_lookup(vma->vm_mm); return __pmd(old_pmd); diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c index 39d2f8012386..fc10c0c24f51 100644 --- a/arch/powerpc/mm/pgtable.c +++ b/arch/powerpc/mm/pgtable.c @@ -368,13 +368,25 @@ pte_t *__find_linux_pte(pgd_t *pgdir, unsigned long ea, pdshift = PMD_SHIFT; pmdp = pmd_offset(&pud, ea); pmd = READ_ONCE(*pmdp); + /* - * A hugepage collapse is captured by pmd_none, because - * it mark the pmd none and do a hpte invalidate. + * A hugepage collapse is captured by this condition, see + * pmdp_collapse_flush. */ if (pmd_none(pmd)) return NULL; +#ifdef CONFIG_PPC_BOOK3S_64 + /* + * A hugepage split is captured by this condition, see + * pmdp_invalidate. + * + * Huge page modification can be caught here too. + */ + if (pmd_is_serializing(pmd)) + return NULL; +#endif + if (pmd_trans_huge(pmd) || pmd_devmap(pmd)) { if (is_thp) *is_thp = true; diff --git a/arch/powerpc/mm/ptdump/hashpagetable.c b/arch/powerpc/mm/ptdump/hashpagetable.c index b9bda0105841..72f0e4a3d839 100644 --- a/arch/powerpc/mm/ptdump/hashpagetable.c +++ b/arch/powerpc/mm/ptdump/hashpagetable.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2016, Rashmica Gupta, IBM Corp. * @@ -7,11 +8,6 @@ * * If radix is enabled then there is no hash page table and so no debugfs file * is generated. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; version 2 - * of the License. */ #include <linux/debugfs.h> #include <linux/fs.h> diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c index 646876d9da64..39bf1e2cba13 100644 --- a/arch/powerpc/mm/ptdump/ptdump.c +++ b/arch/powerpc/mm/ptdump/ptdump.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2016, Rashmica Gupta, IBM Corp. * @@ -8,11 +9,6 @@ * Derived from the arm64 implementation: * Copyright (c) 2014, The Linux Foundation, Laura Abbott. * (C) Copyright 2008 Intel Corporation, Arjan van de Ven. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; version 2 - * of the License. */ #include <linux/debugfs.h> #include <linux/fs.h> |