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/* $Id$ */
/** @file
* GIM - Guest Interface Manager - All Contexts.
*/
/*
* Copyright (C) 2014 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_GIM
#include "GIMInternal.h"
#include <VBox/err.h>
#include <VBox/vmm/vm.h>
/* Include all the providers. */
#include "GIMHvInternal.h"
#include "GIMMinimalInternal.h"
/**
* Checks whether GIM is being used by this VM.
*
* @retval @c true if used.
* @retval @c false if no GIM provider ("none") is used.
*
* @param pVM Pointer to the VM.
*/
VMMDECL(bool) GIMIsEnabled(PVM pVM)
{
return pVM->gim.s.fEnabled;
}
/**
* Implements a GIM hypercall with the provider configured for the VM.
*
* @returns VBox status code.
* @param pVCpu Pointer to the VMCPU.
* @param pCtx Pointer to the guest-CPU context.
*/
VMM_INT_DECL(int) GIMHypercall(PVMCPU pVCpu, PCPUMCTX pCtx)
{
PVM pVM = pVCpu->CTX_SUFF(pVM);
Assert(GIMIsEnabled(pVM));
VMCPU_ASSERT_EMT(pVCpu);
switch (pVM->gim.s.enmProviderId)
{
case GIMPROVIDERID_HYPERV:
return GIMHvHypercall(pVCpu, pCtx);
default:
AssertMsgFailed(("GIMHypercall: for unknown provider %u\n", pVM->gim.s.enmProviderId));
return VERR_GIM_IPE_3;
}
}
/**
* 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 Pointer to the VM.
* @param u64Offset The computed TSC offset.
*
* @thread EMT(pVCpu)
*/
VMMDECL(int) GIMUpdateParavirtTsc(PVM pVM, uint64_t u64Offset)
{
if (!pVM->gim.s.fEnabled)
return VERR_GIM_NOT_ENABLED;
switch (pVM->gim.s.enmProviderId)
{
case GIMPROVIDERID_HYPERV:
return GIMHvUpdateParavirtTsc(pVM, u64Offset);
default:
break;
}
return VERR_GIM_PVTSC_NOT_AVAILABLE;
}
VMMDECL(bool) GIMIsParavirtTscEnabled(PVM pVM)
{
if (!pVM->gim.s.fEnabled)
return false;
switch (pVM->gim.s.enmProviderId)
{
case GIMPROVIDERID_HYPERV:
return GIMHvIsParavirtTscEnabled(pVM);
default:
break;
}
return false;
}
/**
* Invokes the read-MSR handler for the GIM provider configured for the VM.
*
* @returns VBox status code.
* @param pVCpu Pointer to the VMCPU.
* @param idMsr The MSR to read.
* @param pRange The range this MSR belongs to.
* @param puValue Where to store the MSR value read.
*/
VMM_INT_DECL(int) GIMReadMsr(PVMCPU pVCpu, uint32_t idMsr, PCCPUMMSRRANGE pRange, uint64_t *puValue)
{
Assert(pVCpu);
PVM pVM = pVCpu->CTX_SUFF(pVM);
Assert(GIMIsEnabled(pVM));
VMCPU_ASSERT_EMT(pVCpu);
switch (pVM->gim.s.enmProviderId)
{
case GIMPROVIDERID_HYPERV:
return GIMHvReadMsr(pVCpu, idMsr, pRange, puValue);
default:
AssertMsgFailed(("GIMReadMsr: for unknown provider %u idMsr=%#RX32 -> #GP(0)", pVM->gim.s.enmProviderId, idMsr));
return VERR_CPUM_RAISE_GP_0;
}
}
/**
* Invokes the write-MSR handler for the GIM provider configured for the VM.
*
* @returns VBox status code.
* @param pVCpu Pointer to the VMCPU.
* @param idMsr The MSR to write.
* @param pRange The range this MSR belongs to.
* @param uValue The value to set, ignored bits masked.
* @param uRawValue The raw value with the ignored bits not masked.
*/
VMM_INT_DECL(int) GIMWriteMsr(PVMCPU pVCpu, uint32_t idMsr, PCCPUMMSRRANGE pRange, uint64_t uValue, uint64_t uRawValue)
{
AssertPtr(pVCpu);
NOREF(uValue);
PVM pVM = pVCpu->CTX_SUFF(pVM);
Assert(GIMIsEnabled(pVM));
VMCPU_ASSERT_EMT(pVCpu);
switch (pVM->gim.s.enmProviderId)
{
case GIMPROVIDERID_HYPERV:
return GIMHvWriteMsr(pVCpu, idMsr, pRange, uRawValue);
default:
AssertMsgFailed(("GIMWriteMsr: for unknown provider %u idMsr=%#RX32 -> #GP(0)", pVM->gim.s.enmProviderId, idMsr));
return VERR_CPUM_RAISE_GP_0;
}
}
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