Merge "arm64: Add page tables additively when paging hotplug memory"

 */

void hotplug_paging(phys_addr_t start, phys_addr_t size)

{

	struct page *pg;

	phys_addr_t pgd_phys = pgd_pgtable_alloc();

	pgd_t *pgd = pgd_set_fixmap(pgd_phys);

	int flags;

	memcpy(pgd, swapper_pg_dir, PAGE_SIZE);

	flags = debug_pagealloc_enabled() ? NO_BLOCK_MAPPINGS : 0;

	__create_pgd_mapping(pgd, start, __phys_to_virt(start), size,

	__create_pgd_mapping(swapper_pg_dir, start, __phys_to_virt(start), size,

		PAGE_KERNEL, pgd_pgtable_alloc, flags);

	cpu_replace_ttbr1(__va(pgd_phys));

	memcpy(swapper_pg_dir, pgd, PAGE_SIZE);

	cpu_replace_ttbr1(swapper_pg_dir);

	pgd_clear_fixmap();

	pg = phys_to_page(pgd_phys);

	pgtable_page_dtor(pg);

	__free_pages(pg, 0);

}

#ifdef CONFIG_MEMORY_HOTREMOVE