1 | /* $Id: VbglR0CanUsePhysPageList.cpp 96407 2022-08-22 17:43:14Z vboxsync $ */
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2 | /** @file
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3 | * VBoxGuestLibR0 - Physical memory heap.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2006-2022 Oracle and/or its affiliates.
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8 | *
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9 | * Permission is hereby granted, free of charge, to any person
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10 | * obtaining a copy of this software and associated documentation
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11 | * files (the "Software"), to deal in the Software without
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12 | * restriction, including without limitation the rights to use,
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13 | * copy, modify, merge, publish, distribute, sublicense, and/or sell
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14 | * copies of the Software, and to permit persons to whom the
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15 | * Software is furnished to do so, subject to the following
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16 | * conditions:
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17 | *
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18 | * The above copyright notice and this permission notice shall be
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19 | * included in all copies or substantial portions of the Software.
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20 | *
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21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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22 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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23 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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24 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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25 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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26 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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27 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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28 | * OTHER DEALINGS IN THE SOFTWARE.
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29 | */
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30 |
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31 |
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32 | /*********************************************************************************************************************************
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33 | * Header Files *
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34 | *********************************************************************************************************************************/
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35 | #include "VBoxGuestR0LibInternal.h"
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36 |
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37 |
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38 | /**
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39 | * Checks whether the host supports physical page lists or not.
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40 | *
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41 | * @returns true if it does, false if it doesn't.
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42 | */
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43 | DECLR0VBGL(bool) VbglR0CanUsePhysPageList(void)
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44 | {
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45 | /* a_fLocked is false, because the actual capability of the host is requested.
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46 | * See VBGLR0_CAN_USE_PHYS_PAGE_LIST definition.
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47 | */
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48 | int rc = vbglR0Enter();
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49 | return RT_SUCCESS(rc)
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50 | && VBGLR0_CAN_USE_PHYS_PAGE_LIST(/*a_fLocked =*/ false);
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51 | }
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52 |
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