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/* $Id: GIMMinimal.cpp $ */
/** @file
* GIM - Guest Interface Manager, Minimal implementation.
*/
/*
* 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 <VBox/vmm/cpum.h>
#include <VBox/vmm/tm.h>
#include <VBox/vmm/apic.h>
#include "GIMInternal.h"
#include <VBox/vmm/vm.h>
#include <iprt/assert.h>
#include <iprt/err.h>
#include <iprt/string.h>
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
/**
* Initializes the Minimal provider.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
*/
VMMR3_INT_DECL(int) gimR3MinimalInit(PVM pVM)
{
AssertReturn(pVM, VERR_INVALID_PARAMETER);
AssertReturn(pVM->gim.s.enmProviderId == GIMPROVIDERID_MINIMAL, VERR_INTERNAL_ERROR_5);
/*
* Expose HVP (Hypervisor Present) bit to the guest.
*/
CPUMR3SetGuestCpuIdFeature(pVM, CPUMCPUIDFEATURE_HVP);
/*
* Insert the hypervisor leaf range.
*/
CPUMCPUIDLEAF HyperLeaf;
RT_ZERO(HyperLeaf);
HyperLeaf.uLeaf = UINT32_C(0x40000000);
HyperLeaf.uEax = UINT32_C(0x40000010); /* Maximum leaf we implement. */
int rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
if (RT_SUCCESS(rc))
{
/*
* Insert missing zero leaves (you never know what missing leaves are
* going to return when read).
*/
RT_ZERO(HyperLeaf);
for (uint32_t uLeaf = UINT32_C(0x40000001); uLeaf <= UINT32_C(0x40000010); uLeaf++)
{
HyperLeaf.uLeaf = uLeaf;
rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
AssertLogRelRCReturn(rc, rc);
}
}
else
LogRel(("GIM: Minimal: Failed to insert hypervisor leaf %#RX32. rc=%Rrc\n", HyperLeaf.uLeaf, rc));
return rc;
}
/**
* Initializes remaining bits of the Minimal provider.
* This is called after initializing HM and almost all other VMM components.
*
* @returns VBox status code.
* @param pVM The cross context VM structure.
*/
VMMR3_INT_DECL(int) gimR3MinimalInitCompleted(PVM pVM)
{
/*
* Expose a generic hypervisor-agnostic leaf (originally defined by VMware).
* The leaves range from 0x40000010 to 0x400000FF.
*
* This is done in the init. completed routine as we need PDM to be
* initialized (otherwise APICGetTimerFreq() would fail).
*/
CPUMCPUIDLEAF HyperLeaf;
int rc = CPUMR3CpuIdGetLeaf(pVM, &HyperLeaf, 0x40000000, 0 /* uSubLeaf */);
if (RT_SUCCESS(rc))
{
Assert(HyperLeaf.uEax >= 0x40000010);
/*
* Add the timing information hypervisor leaf.
* MacOS X uses this to determine the TSC, bus frequency. See @bugref{7270}.
*
* EAX - TSC frequency in KHz.
* EBX - APIC frequency in KHz.
* ECX, EDX - Reserved.
*/
uint64_t uApicFreq;
rc = APICGetTimerFreq(pVM, &uApicFreq);
AssertLogRelRCReturn(rc, rc);
RT_ZERO(HyperLeaf);
HyperLeaf.uLeaf = UINT32_C(0x40000010);
HyperLeaf.uEax = TMCpuTicksPerSecond(pVM) / UINT64_C(1000);
HyperLeaf.uEbx = (uApicFreq + 500) / UINT64_C(1000);
rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
AssertLogRelRCReturn(rc, rc);
}
else
LogRel(("GIM: Minimal: failed to get hypervisor leaf 0x40000000. rc=%Rrc\n", rc));
return VINF_SUCCESS;
}
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