[87793] | 1 | /* $Id: TMR0.cpp 100208 2023-06-19 14:28:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * TM - Timeout Manager, host ring-0 context.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2021-2023 Oracle and/or its affiliates.
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[87793] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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[87793] | 26 | */
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| 27 |
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| 28 |
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| 29 | /*********************************************************************************************************************************
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| 30 | * Header Files *
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| 31 | *********************************************************************************************************************************/
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| 32 | #define LOG_GROUP LOG_GROUP_TM
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| 33 | #include <VBox/vmm/tm.h>
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| 34 | #include "TMInternal.h"
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| 35 | #include <VBox/vmm/gvm.h>
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| 36 |
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| 37 | #include <VBox/err.h>
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| 38 | #include <VBox/log.h>
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| 39 | #include <VBox/param.h>
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| 40 | #include <iprt/assert.h>
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| 41 | #include <iprt/mem.h>
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| 42 | #include <iprt/memobj.h>
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| 43 | #include <iprt/process.h>
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| 44 | #include <iprt/string.h>
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| 45 |
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| 46 |
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| 47 |
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| 48 | /**
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| 49 | * Initializes the per-VM data for the TM.
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| 50 | *
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| 51 | * This is called from under the GVMM lock, so it should only initialize the
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| 52 | * data so TMR0CleanupVM and others will work smoothly.
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| 53 | *
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| 54 | * @param pGVM Pointer to the global VM structure.
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| 55 | */
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| 56 | VMMR0_INT_DECL(void) TMR0InitPerVMData(PGVM pGVM)
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| 57 | {
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[93655] | 58 | AssertCompile(sizeof(pGVM->tmr0.padding) >= sizeof(pGVM->tmr0.s));
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| 59 |
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[87793] | 60 | for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pGVM->tmr0.s.aTimerQueues); idxQueue++)
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| 61 | {
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| 62 | pGVM->tmr0.s.aTimerQueues[idxQueue].hMemObj = NIL_RTR0MEMOBJ;
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| 63 | pGVM->tmr0.s.aTimerQueues[idxQueue].hMapObj = NIL_RTR0MEMOBJ;
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| 64 | }
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[93654] | 65 |
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[93655] | 66 | pGVM->tmr0.s.VirtualGetRawData.pu64Prev = &pGVM->tm.s.u64VirtualRawPrev;
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| 67 | pGVM->tmr0.s.VirtualGetRawData.pfnBad = tmVirtualNanoTSBad;
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| 68 | pGVM->tmr0.s.VirtualGetRawData.pfnBadCpuIndex = tmVirtualNanoTSBadCpuIndex;
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| 69 | pGVM->tmr0.s.VirtualGetRawData.pfnRediscover = tmVirtualNanoTSRediscover;
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| 70 | pGVM->tmr0.s.pfnVirtualGetRaw = tmVirtualNanoTSRediscover;
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[87793] | 71 | }
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| 72 |
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| 73 |
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| 74 | /**
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| 75 | * Cleans up any loose ends before the GVM structure is destroyed.
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| 76 | */
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| 77 | VMMR0_INT_DECL(void) TMR0CleanupVM(PGVM pGVM)
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| 78 | {
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| 79 | for (uint32_t idxQueue = 0; idxQueue < RT_ELEMENTS(pGVM->tmr0.s.aTimerQueues); idxQueue++)
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| 80 | {
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| 81 | if (pGVM->tmr0.s.aTimerQueues[idxQueue].hMapObj == NIL_RTR0MEMOBJ)
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| 82 | {
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| 83 | RTR0MemObjFree(pGVM->tmr0.s.aTimerQueues[idxQueue].hMapObj, true /*fFreeMappings*/);
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| 84 | pGVM->tmr0.s.aTimerQueues[idxQueue].hMapObj = NIL_RTR0MEMOBJ;
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| 85 | }
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| 86 |
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| 87 | if (pGVM->tmr0.s.aTimerQueues[idxQueue].hMemObj != NIL_RTR0MEMOBJ)
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| 88 | {
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| 89 | RTR0MemObjFree(pGVM->tmr0.s.aTimerQueues[idxQueue].hMemObj, true /*fFreeMappings*/);
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| 90 | pGVM->tmr0.s.aTimerQueues[idxQueue].hMemObj = NIL_RTR0MEMOBJ;
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| 91 | }
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| 92 | }
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| 93 | }
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| 94 |
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| 95 |
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[87796] | 96 | /**
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| 97 | * Grows the timer array for @a idxQueue to at least @a cMinTimers entries.
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| 98 | *
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| 99 | * @returns VBox status code.
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| 100 | * @param pGVM The ring-0 VM structure.
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| 101 | * @param idxQueue The index of the queue to grow.
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| 102 | * @param cMinTimers The minimum growth target.
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| 103 | * @thread EMT
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| 104 | * @note Caller must own the queue lock exclusively.
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| 105 | */
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[87793] | 106 | VMMR0_INT_DECL(int) TMR0TimerQueueGrow(PGVM pGVM, uint32_t idxQueue, uint32_t cMinTimers)
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| 107 | {
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| 108 | /*
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| 109 | * Validate input and state.
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| 110 | */
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| 111 | VM_ASSERT_EMT0_RETURN(pGVM, VERR_VM_THREAD_NOT_EMT);
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| 112 | VM_ASSERT_STATE_RETURN(pGVM, VMSTATE_CREATING, VERR_VM_INVALID_VM_STATE); /** @todo must do better than this! */
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[100208] | 113 | AssertReturn(idxQueue < RT_ELEMENTS(pGVM->tmr0.s.aTimerQueues), VERR_TM_INVALID_TIMER_QUEUE);
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[87793] | 114 | AssertCompile(RT_ELEMENTS(pGVM->tmr0.s.aTimerQueues) == RT_ELEMENTS(pGVM->tm.s.aTimerQueues));
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| 115 | PTMTIMERQUEUER0 pQueueR0 = &pGVM->tmr0.s.aTimerQueues[idxQueue];
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| 116 | PTMTIMERQUEUE pQueueShared = &pGVM->tm.s.aTimerQueues[idxQueue];
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[90347] | 117 | AssertMsgReturn(PDMCritSectRwIsWriteOwner(pGVM, &pQueueShared->AllocLock),
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[87796] | 118 | ("queue=%s %.*Rhxs\n", pQueueShared->szName, sizeof(pQueueShared->AllocLock), &pQueueShared->AllocLock),
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| 119 | VERR_NOT_OWNER);
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[87793] | 120 |
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| 121 | uint32_t cNewTimers = cMinTimers;
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| 122 | AssertReturn(cNewTimers <= _32K, VERR_TM_TOO_MANY_TIMERS);
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[92712] | 123 | uint32_t const cOldTimers = pQueueR0->cTimersAlloc;
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[87793] | 124 | ASMCompilerBarrier();
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[92712] | 125 | AssertReturn(cNewTimers >= cOldTimers, VERR_TM_IPE_1);
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| 126 | AssertReturn(cOldTimers == pQueueShared->cTimersAlloc, VERR_TM_IPE_2);
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[87793] | 127 |
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| 128 | /*
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| 129 | * Round up the request to the nearest page and do the allocation.
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| 130 | */
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| 131 | size_t cbNew = sizeof(TMTIMER) * cNewTimers;
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[93554] | 132 | cbNew = RT_ALIGN_Z(cbNew, HOST_PAGE_SIZE);
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[87793] | 133 | cNewTimers = (uint32_t)(cbNew / sizeof(TMTIMER));
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| 134 |
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| 135 | RTR0MEMOBJ hMemObj;
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| 136 | int rc = RTR0MemObjAllocPage(&hMemObj, cbNew, false /*fExecutable*/);
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| 137 | if (RT_SUCCESS(rc))
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| 138 | {
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| 139 | /*
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| 140 | * Zero and map it.
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| 141 | */
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| 142 | PTMTIMER paTimers = (PTMTIMER)RTR0MemObjAddress(hMemObj);
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| 143 | RT_BZERO(paTimers, cbNew);
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| 144 |
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| 145 | RTR0MEMOBJ hMapObj;
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[93554] | 146 | rc = RTR0MemObjMapUser(&hMapObj, hMemObj, (RTR3PTR)-1, HOST_PAGE_SIZE,
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| 147 | RTMEM_PROT_READ | RTMEM_PROT_WRITE, RTR0ProcHandleSelf());
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[87793] | 148 | if (RT_SUCCESS(rc))
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| 149 | {
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[92712] | 150 | tmHCTimerQueueGrowInit(paTimers, pQueueR0->paTimers, cNewTimers, cOldTimers);
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[87793] | 151 |
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| 152 | /*
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| 153 | * Switch the memory handles.
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| 154 | */
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| 155 | RTR0MEMOBJ hTmp = pQueueR0->hMapObj;
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| 156 | pQueueR0->hMapObj = hMapObj;
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| 157 | hMapObj = hTmp;
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| 158 |
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| 159 | hTmp = pQueueR0->hMemObj;
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| 160 | pQueueR0->hMemObj = hMemObj;
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| 161 | hMemObj = hTmp;
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| 162 |
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| 163 | /*
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| 164 | * Update the variables.
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| 165 | */
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| 166 | pQueueR0->paTimers = paTimers;
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| 167 | pQueueR0->cTimersAlloc = cNewTimers;
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| 168 | pQueueShared->paTimers = RTR0MemObjAddressR3(pQueueR0->hMapObj);
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| 169 | pQueueShared->cTimersAlloc = cNewTimers;
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[92712] | 170 | pQueueShared->cTimersFree += cNewTimers - (cOldTimers ? cOldTimers : 1);
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[87793] | 171 |
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| 172 | /*
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| 173 | * Free the old allocation.
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| 174 | */
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| 175 | RTR0MemObjFree(hMapObj, true /*fFreeMappings*/);
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| 176 | }
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| 177 | RTR0MemObjFree(hMemObj, true /*fFreeMappings*/);
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| 178 | }
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| 179 |
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| 180 | return rc;
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| 181 | }
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| 182 |
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