source: vbox/trunk/src/VBox/Additions/common/VBoxGuest/lib/VbglR0CanUsePhysPageList.cpp@ 68793

/* $Id: VbglR0CanUsePhysPageList.cpp 68653 2017-09-05 14:53:44Z vboxsync $ */
/** @file
 * VBoxGuestLibR0 - Physical memory heap.
 */

/*
 * Copyright (C) 2006-2016 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */

/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#include "VBoxGuestR0LibInternal.h"


/**
 * Checks whether the host supports physical page lists or not.
 *
 * @returns true if it does, false if it doesn't.
 */
DECLR0VBGL(bool) VbglR0CanUsePhysPageList(void)
{
    /* a_fLocked is false, because the actual capability of the host is requested.
     * See VBGLR0_CAN_USE_PHYS_PAGE_LIST definition.
     */
    int rc = vbglR0Enter();
    return RT_SUCCESS(rc)
        && VBGLR0_CAN_USE_PHYS_PAGE_LIST(/*a_fLocked =*/ false);
}