| 1 | /* $Id: VbglR0CanUsePhysPageList.cpp 76553 2019-01-01 01:45:53Z 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) 2006-2019 Oracle Corporation
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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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