kvm/mmu/mmu.c

3848 			if (WARN_ON_ONCE(!mmu->pml5_root)) {
3852 			mmu->pml5_root[0] = __pa(mmu->pml4_root) | pm_mask;
3880 		mmu->root.hpa = __pa(mmu->pml5_root);
3898 	u64 *pml5_root = NULL;
3916 	 * all MMus are 5-level.  Thus, this can safely require that pml5_root
3920 	if (mmu->pae_root && mmu->pml4_root && (!need_pml5 || mmu->pml5_root))
3928 			 (need_pml5 && mmu->pml5_root)))
3945 		pml5_root = (void *)get_zeroed_page(GFP_KERNEL_ACCOUNT);
3946 		if (!pml5_root)
3953 	mmu->pml5_root = pml5_root;
6119 	free_page((unsigned long)mmu->pml5_root);