| 1 | /* $Id: APICR0.cpp 60364 2016-04-06 16:08:15Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Advanced Programmable Interrupt Controller (APIC) - Host Context Ring-0.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2016 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*********************************************************************************************************************************
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| 20 | * Header Files *
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| 21 | *********************************************************************************************************************************/
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| 22 | #define LOG_GROUP LOG_GROUP_DEV_APIC
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| 23 | #include "APICInternal.h"
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| 24 | #include <iprt/mem.h>
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| 25 | #include <iprt/memobj.h>
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| 26 | #include <iprt/process.h>
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| 27 | #include <VBox/vmm/vm.h>
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| 28 |
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| 29 |
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| 30 | /**
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| 31 | * Does ring-0 per-VM APIC initialization.
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| 32 | *
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| 33 | * @returns VBox status code.
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| 34 | * @param pVM The cross context VM structure.
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| 35 | */
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| 36 | VMMR0_INT_DECL(int) APICR0InitVM(PVM pVM)
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| 37 | {
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| 38 | /* Paranoia. */
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| 39 | PAPIC pApic = VM_TO_APIC(pVM);
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| 40 | Assert(pApic->hMapObjApicPibR0 == NIL_RTR0MEMOBJ);
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| 41 | Assert(pApic->hMapObjApicPibR0 == NIL_RTR0MEMOBJ);
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| 42 |
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| 43 | /* Init. non-zero members. */
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| 44 | pApic->HCPhysApicPib = NIL_RTHCPHYS;
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| 45 |
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| 46 | /*
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| 47 | * Allocate and map the pending-interrupt bitmap (PIB).
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| 48 | *
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| 49 | * We allocate all the VCPUs' PIBs contiguously in order to save space
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| 50 | * as physically contiguous allocations are rounded to a multiple of page size.
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| 51 | */
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| 52 | size_t const cbApicPib = RT_ALIGN_Z(pVM->cCpus * sizeof(APICPIB), PAGE_SIZE);
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| 53 | int rc = RTR0MemObjAllocCont(&pApic->hMemObjApicPibR0, cbApicPib, false /* fExecutable */);
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| 54 | if (RT_SUCCESS(rc))
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| 55 | {
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| 56 | pApic->cbApicPib = cbApicPib;
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| 57 | pApic->pvApicPibR0 = RTR0MemObjAddress(pApic->hMemObjApicPibR0);
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| 58 | pApic->HCPhysApicPib = RTR0MemObjGetPagePhysAddr(pApic->hMemObjApicPibR0, 0 /* iPage */);
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| 59 | ASMMemZero32(pApic->pvApicPibR0, cbApicPib);
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| 60 |
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| 61 | rc = RTR0MemObjMapUser(&pApic->hMapObjApicPibR0, pApic->hMemObjApicPibR0, (RTR3PTR)-1, 0 /* uAlignment */,
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| 62 | RTMEM_PROT_READ | RTMEM_PROT_WRITE, RTR0ProcHandleSelf());
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| 63 | if (RT_SUCCESS(rc))
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| 64 | pApic->pvApicPibR3 = RTR0MemObjAddressR3(pApic->hMapObjApicPibR0);
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| 65 | else
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| 66 | {
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| 67 | LogRel(("APICR0InitVM: Failed to map pending-interrupt bitmap of %u bytes. rc=%Rrc\n", cbApicPib, rc));
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| 68 | return rc;
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| 69 | }
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| 70 | }
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| 71 | else
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| 72 | {
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| 73 | LogRel(("APICR0InitVM: Failed to allocate pending-interrupt bitmap of %u bytes. rc=%Rrc\n", cbApicPib, rc));
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| 74 | return rc;
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| 75 | }
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| 76 |
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| 77 | /*
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| 78 | * Allocate and map the virtual-APIC page.
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| 79 | */
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| 80 | for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
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| 81 | {
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| 82 | PVMCPU pVCpu = &pVM->aCpus[idCpu];
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| 83 | PAPICCPU pApicCpu = VMCPU_TO_APICCPU(pVCpu);
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| 84 | size_t const cbApicPage = PAGE_SIZE;
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| 85 |
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| 86 | /* Paranoia. */
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| 87 | Assert(pApicCpu->hMapObjApicPageR0 == NIL_RTR0MEMOBJ);
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| 88 | Assert(pApicCpu->hMapObjApicPageR0 == NIL_RTR0MEMOBJ);
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| 89 |
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| 90 | /* Init. non-zero members. */
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| 91 | pApicCpu->HCPhysApicPage = NIL_RTHCPHYS;
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| 92 |
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| 93 | rc = RTR0MemObjAllocCont(&pApicCpu->hMemObjApicPageR0, cbApicPage, false /* fExecutable */);
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| 94 | if (RT_SUCCESS(rc))
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| 95 | {
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| 96 | pApicCpu->cbApicPage = cbApicPage;
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| 97 | pApicCpu->pvApicPageR0 = RTR0MemObjAddress(pApicCpu->hMemObjApicPageR0);
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| 98 | pApicCpu->HCPhysApicPage = RTR0MemObjGetPagePhysAddr(pApicCpu->hMemObjApicPageR0, 0 /* iPage */);
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| 99 | ASMMemZero32(pApicCpu->pvApicPageR0, cbApicPage);
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| 100 |
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| 101 | rc = RTR0MemObjMapUser(&pApicCpu->hMapObjApicPageR0, pApicCpu->hMemObjApicPageR0, (RTR3PTR)-1, 0 /* uAlignment */,
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| 102 | RTMEM_PROT_READ | RTMEM_PROT_WRITE, RTR0ProcHandleSelf());
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| 103 | if (RT_SUCCESS(rc))
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| 104 | {
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| 105 | pApicCpu->pvApicPageR3 = RTR0MemObjAddressR3(pApicCpu->hMapObjApicPageR0);
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| 106 |
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| 107 | /*
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| 108 | * Associate the per-VCPU PIB pointers to the per-VM PIB allocation.
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| 109 | */
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| 110 | const size_t offApicPib = idCpu * sizeof(APICPIB);
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| 111 | pApicCpu->HCPhysApicPib = pApic->HCPhysApicPib + offApicPib;
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| 112 | pApicCpu->pvApicPibR0 = (RTR0PTR)((uint8_t *)pApic->pvApicPibR0 + offApicPib);
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| 113 | pApicCpu->pvApicPibR3 = (RTR3PTR)((uint8_t *)pApic->pvApicPibR3 + offApicPib);
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| 114 | }
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| 115 | else
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| 116 | {
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| 117 | LogRel(("APICR0InitVM: VCPU[%u]: Failed to map APIC page of %u bytes. rc=%Rrc\n", idCpu, cbApicPib, rc));
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| 118 | return rc;
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| 119 | }
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| 120 | }
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| 121 | else
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| 122 | {
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| 123 | LogRel(("APICR0InitVM: VCPU[%u]: Failed to allocate APIC page of %u bytes. rc=%Rrc\n", idCpu, cbApicPib, rc));
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| 124 | return rc;
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | LogFlow(("APICR0InitVM: Completed successfully\n"));
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| 129 | return VINF_SUCCESS;
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| 130 | }
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| 131 |
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| 132 |
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| 133 | /**
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| 134 | * Does ring-0 per-VM APIC termination.
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| 135 | *
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| 136 | * @returns VBox status code.
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| 137 | * @param pVM The cross context VM structure.
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| 138 | */
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| 139 | VMMR0_INT_DECL(int) APICR0TermVM(PVM pVM)
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| 140 | {
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| 141 | PAPIC pApic = VM_TO_APIC(pVM);
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| 142 | if (pApic->hMapObjApicPibR0 != NIL_RTR0MEMOBJ)
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| 143 | {
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| 144 | RTR0MemObjFree(pApic->hMapObjApicPibR0, true /* fFreeMappings */);
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| 145 | pApic->hMapObjApicPibR0 = NIL_RTR0MEMOBJ;
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| 146 | pApic->pvApicPibR3 = NULL;
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| 147 | }
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| 148 | if (pApic->hMemObjApicPibR0 != NIL_RTR0MEMOBJ)
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| 149 | {
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| 150 | RTR0MemObjFree(pApic->hMemObjApicPibR0, true /* fFreeMappings */);
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| 151 | pApic->hMemObjApicPibR0 = NIL_RTR0MEMOBJ;
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| 152 | pApic->pvApicPibR0 = NULL;
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| 153 | pApic->HCPhysApicPib = NIL_RTHCPHYS;
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| 154 | }
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| 155 |
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| 156 | for (VMCPUID idCpu = 0; idCpu < pVM->cCpus; idCpu++)
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| 157 | {
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| 158 | PVMCPU pVCpu = &pVM->aCpus[idCpu];
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| 159 | PAPICCPU pApicCpu = &pVCpu->apic.s;
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| 160 |
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| 161 | if (pApicCpu->hMapObjApicPageR0 != NIL_RTR0MEMOBJ)
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| 162 | {
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| 163 | RTR0MemObjFree(pApicCpu->hMapObjApicPageR0, true /* fFreeMappings */);
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| 164 | pApicCpu->hMapObjApicPageR0 = NIL_RTR0MEMOBJ;
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| 165 | pApicCpu->pvApicPageR3 = NULL;
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| 166 | }
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| 167 | if (pApicCpu->hMemObjApicPageR0 != NIL_RTR0MEMOBJ)
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| 168 | {
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| 169 | RTR0MemObjFree(pApicCpu->hMemObjApicPageR0, true /* fFreeMappings */);
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| 170 | pApicCpu->hMemObjApicPageR0 = NIL_RTR0MEMOBJ;
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| 171 | pApicCpu->pvApicPageR0 = NULL;
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| 172 | pApicCpu->HCPhysApicPage = NIL_RTHCPHYS;
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| 173 | }
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| 174 | }
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| 175 |
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| 176 | LogFlow(("APICR0TermVM: Completed successfully\n"));
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| 177 | return VINF_SUCCESS;
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| 178 | }
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| 179 |
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