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Diffstat (limited to '')
-rw-r--r-- | arch/arm64/mm/copypage.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm64/mm/copypage.c b/arch/arm64/mm/copypage.c new file mode 100644 index 000000000..f2fa8a077 --- /dev/null +++ b/arch/arm64/mm/copypage.c @@ -0,0 +1,40 @@ +// 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)) { + 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); |