/* * Variable page size handling -- target independent part. * * Copyright (c) 2003 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ #define IN_PAGE_VARY 1 #include "qemu/osdep.h" #include "qemu-common.h" #include "exec/page-vary.h" /* WARNING: This file must *not* be complied with -flto. */ TargetPageBits target_page; bool set_preferred_target_page_bits_common(int bits) { /* * The target page size is the lowest common denominator for all * the CPUs in the system, so we can only make it smaller, never * larger. And we can't make it smaller once we've committed to * a particular size. */ if (target_page.bits == 0 || target_page.bits > bits) { if (target_page.decided) { return false; } target_page.bits = bits; } return true; } void finalize_target_page_bits_common(int min) { if (target_page.bits == 0) { target_page.bits = min; } target_page.mask = -1ull << target_page.bits; target_page.decided = true; }