43 lines
999 B
C
43 lines
999 B
C
// 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())
|
|
page_kasan_tag_reset(to);
|
|
|
|
if (system_supports_mte() && page_mte_tagged(from)) {
|
|
/* It's a new page, shouldn't have been tagged yet */
|
|
WARN_ON_ONCE(!try_page_mte_tagging(to));
|
|
mte_copy_page_tags(kto, kfrom);
|
|
set_page_mte_tagged(to);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(copy_highpage);
|
|
|
|
void copy_user_highpage(struct page *to, struct page *from,
|
|
unsigned long vaddr, struct vm_area_struct *vma)
|
|
{
|
|
copy_highpage(to, from);
|
|
flush_dcache_page(to);
|
|
}
|
|
EXPORT_SYMBOL_GPL(copy_user_highpage);
|