/* $Id: VbglR0CanUsePhysPageList.cpp $ */
/** @file
 * VBoxGuestLibR0 - Physical memory heap.
 */

/*
 * Copyright (C) 2006-2019 Oracle Corporation
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */


/*********************************************************************************************************************************
*   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);
}