| 1 | /* $Id: GIMR0.cpp 51643 2014-06-18 11:06:06Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Guest Interface Manager (GIM) - 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) 2014 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 | * Header Files *
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| 20 | *******************************************************************************/
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| 21 | #define LOG_GROUP LOG_GROUP_GIM
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| 22 | #include "GIMInternal.h"
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| 23 | #include "GIMHvInternal.h"
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| 24 |
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| 25 | #include <VBox/err.h>
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| 26 | #include <VBox/vmm/vm.h>
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| 27 |
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| 28 |
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| 29 | /**
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| 30 | * Does ring-0 per-VM GIM initialization.
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| 31 | *
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| 32 | * @returns VBox status code.
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| 33 | * @param pVM Pointer to the VM.
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| 34 | */
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| 35 | VMMR0_INT_DECL(int) GIMR0InitVM(PVM pVM)
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| 36 | {
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| 37 | if (!GIMIsEnabled(pVM))
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| 38 | return VINF_SUCCESS;
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| 39 |
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| 40 | switch (pVM->gim.s.enmProviderId)
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| 41 | {
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| 42 | case GIMPROVIDERID_HYPERV:
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| 43 | return GIMR0HvInitVM(pVM);
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| 44 |
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| 45 | default:
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| 46 | break;
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| 47 | }
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| 48 | return VINF_SUCCESS;
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| 49 | }
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| 50 |
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| 51 |
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| 52 | /**
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| 53 | * Does ring-0 per-VM GIM termination.
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| 54 | *
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| 55 | * @returns VBox status code.
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| 56 | * @param pVM Pointer to the VM.
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| 57 | */
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| 58 | VMMR0_INT_DECL(int) GIMR0TermVM(PVM pVM)
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| 59 | {
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| 60 | if (!GIMIsEnabled(pVM))
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| 61 | return VINF_SUCCESS;
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| 62 |
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| 63 | switch (pVM->gim.s.enmProviderId)
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| 64 | {
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| 65 | case GIMPROVIDERID_HYPERV:
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| 66 | return GIMR0HvTermVM(pVM);
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| 67 |
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| 68 | default:
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| 69 | break;
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| 70 | }
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| 71 | return VINF_SUCCESS;
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| 72 | }
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| 73 |
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| 74 | /**
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| 75 | * Updates the paravirtualized TSC supported by the GIM provider.
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| 76 | *
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| 77 | * @returns VBox status code.
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| 78 | * @retval VINF_SUCCESS if the paravirt. TSC is setup and in use.
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| 79 | * @retval VERR_GIM_NOT_ENABLED if no GIM provider is configured for this VM.
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| 80 | * @retval VERR_GIM_PVTSC_NOT_AVAILABLE if the GIM provider does not support any
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| 81 | * paravirt. TSC.
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| 82 | * @retval VERR_GIM_PVTSC_NOT_IN_USE if the GIM provider supports paravirt. TSC
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| 83 | * but the guest isn't currently using it.
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| 84 | *
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| 85 | * @param pVM Pointer to the VM.
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| 86 | * @param u64Offset The computed TSC offset.
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| 87 | *
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| 88 | * @thread EMT(pVCpu)
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| 89 | */
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| 90 | VMMR0_INT_DECL(int) GIMR0UpdateParavirtTsc(PVM pVM, uint64_t u64Offset)
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| 91 | {
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| 92 | if (!pVM->gim.s.fEnabled)
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| 93 | return VERR_GIM_NOT_ENABLED;
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| 94 |
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| 95 | switch (pVM->gim.s.enmProviderId)
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| 96 | {
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| 97 | case GIMPROVIDERID_HYPERV:
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| 98 | return GIMR0HvUpdateParavirtTsc(pVM, u64Offset);
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| 99 |
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| 100 | default:
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| 101 | break;
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| 102 | }
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| 103 | return VERR_GIM_PVTSC_NOT_AVAILABLE;
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| 104 | }
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| 105 |
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