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/* $Id: GIMR0.cpp $ */
/** @file
* Guest Interface Manager (GIM) - Host Context Ring-0.
*/
/*
* Copyright (C) 2014-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_GIM
#include <VBox/vmm/gim.h>
#include "GIMInternal.h"
#include "GIMHvInternal.h"
#include <VBox/vmm/vmcc.h>
#include <VBox/err.h>
/**
* Does ring-0 per-VM GIM initialization.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
*/
VMMR0_INT_DECL(int) GIMR0InitVM(PVMCC pVM)
{
if (!GIMIsEnabled(pVM))
return VINF_SUCCESS;
switch (pVM->gim.s.enmProviderId)
{
case GIMPROVIDERID_HYPERV:
return gimR0HvInitVM(pVM);
default:
break;
}
return VINF_SUCCESS;
}
/**
* Does ring-0 per-VM GIM termination.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
*/
VMMR0_INT_DECL(int) GIMR0TermVM(PVMCC pVM)
{
if (!GIMIsEnabled(pVM))
return VINF_SUCCESS;
switch (pVM->gim.s.enmProviderId)
{
case GIMPROVIDERID_HYPERV:
return gimR0HvTermVM(pVM);
default:
break;
}
return VINF_SUCCESS;
}
/**
* Updates the paravirtualized TSC supported by the GIM provider.
*
* @returns VBox status code.
* @retval VINF_SUCCESS if the paravirt. TSC is setup and in use.
* @retval VERR_GIM_NOT_ENABLED if no GIM provider is configured for this VM.
* @retval VERR_GIM_PVTSC_NOT_AVAILABLE if the GIM provider does not support any
* paravirt. TSC.
* @retval VERR_GIM_PVTSC_NOT_IN_USE if the GIM provider supports paravirt. TSC
* but the guest isn't currently using it.
*
* @param pVM The cross context VM structure.
* @param u64Offset The computed TSC offset.
*
* @thread EMT(pVCpu)
*/
VMMR0_INT_DECL(int) GIMR0UpdateParavirtTsc(PVMCC pVM, uint64_t u64Offset)
{
switch (pVM->gim.s.enmProviderId)
{
case GIMPROVIDERID_HYPERV:
return gimR0HvUpdateParavirtTsc(pVM, u64Offset);
case GIMPROVIDERID_KVM:
return VINF_SUCCESS;
case GIMPROVIDERID_NONE:
return VERR_GIM_NOT_ENABLED;
default:
break;
}
return VERR_GIM_PVTSC_NOT_AVAILABLE;
}
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