blob: a0e1ee716481e0fb3a4e5453fbc5dbf2915ce19b [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
* Based on arch/arm/mm/copypage.c
* Copyright (C) 2002 Deep Blue Solutions Ltd, All Rights Reserved.
* Copyright (C) 2012 ARM Ltd.
#include <linux/bitops.h>
#include <linux/mm.h>
#include <asm/page.h>
#include <asm/cacheflush.h>
#include <asm/cpufeature.h>
#include <asm/mte.h>
void copy_highpage(struct page *to, struct page *from)
void *kto = page_address(to);
void *kfrom = page_address(from);
copy_page(kto, kfrom);
if (kasan_hw_tags_enabled())
if (system_supports_mte() && test_bit(PG_mte_tagged, &from->flags)) {
set_bit(PG_mte_tagged, &to->flags);
* We need smp_wmb() in between setting the flags and clearing the
* tags because if another thread reads page->flags and builds a
* tagged address out of it, there is an actual dependency to the
* memory access, but on the current thread we do not guarantee that
* the new page->flags are visible before the tags were updated.
mte_copy_page_tags(kto, kfrom);
void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma)
copy_highpage(to, from);