// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2020 Google LLC * Author: Quentin Perret <qperret@google.com> */ #include <asm/kvm_pgtable.h> #include <nvhe/early_alloc.h> #include <nvhe/memory.h> struct kvm_pgtable_mm_ops hyp_early_alloc_mm_ops; s64 __ro_after_init hyp_physvirt_offset; static unsigned long base; static unsigned long end; static unsigned long cur; unsigned long hyp_early_alloc_nr_used_pages(void) { return (cur - base) >> PAGE_SHIFT; } void *hyp_early_alloc_contig(unsigned int nr_pages) { unsigned long size = (nr_pages << PAGE_SHIFT); void *ret = (void *)cur; if (!nr_pages) return NULL; if (end - cur < size) return NULL; cur += size; memset(ret, 0, size); return ret; } void *hyp_early_alloc_page(void *arg) { return hyp_early_alloc_contig(1); } static void hyp_early_alloc_get_page(void *addr) { } static void hyp_early_alloc_put_page(void *addr) { } void hyp_early_alloc_init(void *virt, unsigned long size) { base = cur = (unsigned long)virt; end = base + size; hyp_early_alloc_mm_ops.zalloc_page = hyp_early_alloc_page; hyp_early_alloc_mm_ops.phys_to_virt = hyp_phys_to_virt; hyp_early_alloc_mm_ops.virt_to_phys = hyp_virt_to_phys; hyp_early_alloc_mm_ops.get_page = hyp_early_alloc_get_page; hyp_early_alloc_mm_ops.put_page = hyp_early_alloc_put_page; }