diff options
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/book3s64/pgtable.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/mm/dma-noncoherent.c | 5 | ||||
| -rw-r--r-- | arch/powerpc/mm/mem.c | 3 | ||||
| -rw-r--r-- | arch/powerpc/mm/pgtable.c | 16 |
4 files changed, 20 insertions, 7 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/dma-noncoherent.c b/arch/powerpc/mm/dma-noncoherent.c index 2f6154b76328..c617282d5b2a 100644 --- a/arch/powerpc/mm/dma-noncoherent.c +++ b/arch/powerpc/mm/dma-noncoherent.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * PowerPC version derived from arch/arm/mm/consistent.c * Copyright (C) 2001 Dan Malek (dmalek@jlc.net) @@ -16,10 +17,6 @@ * Added in_interrupt() safe dma_alloc_coherent()/dma_free_coherent() * implementation. This is pulled straight from ARM and barely * modified. -Matt - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. */ #include <linux/sched.h> diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index cba29131bccc..2540d3b2588c 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -248,7 +248,8 @@ void __init paging_init(void) (long int)((top_of_ram - total_ram) >> 20)); #ifdef CONFIG_ZONE_DMA - max_zone_pfns[ZONE_DMA] = min(max_low_pfn, 0x7fffffffUL >> PAGE_SHIFT); + max_zone_pfns[ZONE_DMA] = min(max_low_pfn, + ((1UL << ARCH_ZONE_DMA_BITS) - 1) >> PAGE_SHIFT); #endif max_zone_pfns[ZONE_NORMAL] = max_low_pfn; #ifdef CONFIG_HIGHMEM 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; |
