blob: 8566bdc9b5f108aa1b2faf4b102c60a2cb20e5c8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/* $Id: MMPagePool.cpp $ */
/** @file
* MM - Memory Manager - Page Pool (what's left of it).
*/
/*
* Copyright (C) 2006-2020 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_MM_POOL
#include <VBox/vmm/mm.h>
#include "MMInternal.h"
#include <VBox/vmm/vm.h>
#include <iprt/errcore.h>
#include <VBox/log.h>
/**
* Gets the HC pointer to the dummy page.
*
* The dummy page is used as a place holder to prevent potential bugs
* from doing really bad things to the system.
*
* @returns Pointer to the dummy page.
* @param pVM The cross context VM structure.
* @thread The Emulation Thread.
*/
VMMR3DECL(void *) MMR3PageDummyHCPtr(PVM pVM)
{
VM_ASSERT_EMT(pVM);
if (!pVM->mm.s.pvDummyPage)
{
int rc = MMHyperAlloc(pVM, PAGE_SIZE, PAGE_SIZE, MM_TAG_PGM, &pVM->mm.s.pvDummyPage);
AssertRelease(RT_SUCCESS(rc));
AssertRelease(pVM->mm.s.pvDummyPage);
pVM->mm.s.HCPhysDummyPage = MMR3HyperHCVirt2HCPhys(pVM, pVM->mm.s.pvDummyPage);
AssertRelease(!(pVM->mm.s.HCPhysDummyPage & ~X86_PTE_PAE_PG_MASK));
}
return pVM->mm.s.pvDummyPage;
}
/**
* Gets the HC Phys to the dummy page.
*
* The dummy page is used as a place holder to prevent potential bugs
* from doing really bad things to the system.
*
* @returns Pointer to the dummy page.
* @param pVM The cross context VM structure.
* @thread The Emulation Thread.
*/
VMMR3DECL(RTHCPHYS) MMR3PageDummyHCPhys(PVM pVM)
{
VM_ASSERT_EMT(pVM);
if (!pVM->mm.s.pvDummyPage)
MMR3PageDummyHCPtr(pVM);
return pVM->mm.s.HCPhysDummyPage;
}
|
