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/** @file
* GVM - The Global VM Data.
*/
/*
* Copyright (C) 2007-2025 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>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef VBOX_INCLUDED_vmm_uvm_h
#define VBOX_INCLUDED_vmm_uvm_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <VBox/param.h>
#include <VBox/types.h>
#include <iprt/assert.h>
/** @addtogroup grp_vm
* @{ */
/**
* Per virtual CPU ring-3 (user mode) data.
*/
typedef struct UVMCPU
{
/** Pointer to the UVM structure. */
PUVM pUVM;
/** Pointer to the VM structure. */
PVM pVM;
/** Pointer to the VMCPU structure. */
PVMCPU pVCpu;
/** The virtual CPU ID. */
RTCPUID idCpu;
/** Alignment padding. */
uint8_t abAlignment0[4];
/** The VM internal data. */
union
{
#ifdef VMM_INCLUDED_SRC_include_VMInternal_h
struct VMINTUSERPERVMCPU s;
#endif
uint8_t padding[512];
} vm;
/** The DBGF data. */
union
{
#ifdef VMM_INCLUDED_SRC_include_DBGFInternal_h
struct DBGFUSERPERVMCPU s;
#endif
uint8_t padding[64];
} dbgf;
} UVMCPU;
AssertCompileMemberAlignment(UVMCPU, vm, 32);
/**
* The ring-3 (user mode) VM structure.
*
* This structure is similar to VM and GVM except that it resides in swappable
* user memory. The main purpose is to assist bootstrapping, where it allows us
* to start EMT much earlier and gives PDMLdr somewhere to put it's VMMR0 data.
* It is also a nice place to put big things that are user mode only.
*/
typedef struct UVM
{
/** Magic / eye-catcher (UVM_MAGIC). */
uint32_t u32Magic;
/** The number of virtual CPUs. */
uint32_t cCpus;
/** The ring-3 mapping of the shared VM structure. */
PVM pVM;
/** Pointer to the next VM.
* We keep a per process list of VM for the event that a process could
* contain more than one VM.
* @todo move this into vm.s!
*/
struct UVM *pNext;
/** Pointer to the optional method table provided by the VMM user. */
PCVMM2USERMETHODS pVmm2UserMethods;
/** The VM internal data. */
union
{
#ifdef VMM_INCLUDED_SRC_include_VMInternal_h
struct VMINTUSERPERVM s;
#endif
uint8_t padding[512];
} vm;
/** The MM data. */
union
{
#ifdef VMM_INCLUDED_SRC_include_MMInternal_h
struct MMUSERPERVM s;
#endif
uint8_t padding[32];
} mm;
/** The PDM data. */
union
{
#ifdef VMM_INCLUDED_SRC_include_PDMInternal_h
struct PDMUSERPERVM s;
#endif
uint8_t padding[256];
} pdm;
/** The STAM data. */
union
{
#ifdef VMM_INCLUDED_SRC_include_STAMInternal_h
struct STAMUSERPERVM s;
#endif
uint8_t padding[30208];
} stam;
/** The DBGF data. */
union
{
#ifdef VMM_INCLUDED_SRC_include_DBGFInternal_h
struct DBGFUSERPERVM s;
#endif
uint8_t padding[1024];
} dbgf;
/** Per virtual CPU data. */
UVMCPU aCpus[1];
} UVM;
AssertCompileMemberAlignment(UVM, vm, 32);
AssertCompileMemberAlignment(UVM, mm, 32);
AssertCompileMemberAlignment(UVM, pdm, 32);
AssertCompileMemberAlignment(UVM, stam, 32);
AssertCompileMemberAlignment(UVM, aCpus, 32);
/** The UVM::u32Magic value (Brad Mehldau). */
#define UVM_MAGIC 0x19700823
/** @def UVM_ASSERT_VALID_EXT_RETURN
* Asserts a user mode VM handle is valid for external access.
*/
#define UVM_ASSERT_VALID_EXT_RETURN(a_pUVM, a_rc) \
AssertMsgReturn( RT_VALID_ALIGNED_PTR(a_pUVM, HOST_PAGE_SIZE_DYNAMIC) \
&& (a_pUVM)->u32Magic == UVM_MAGIC, \
("a_pUVM=%p u32Magic=%#x\n", (a_pUVM), \
RT_VALID_ALIGNED_PTR(a_pUVM, HOST_PAGE_SIZE_DYNAMIC) ? (a_pUVM)->u32Magic : 0), \
(a_rc))
/** @def UVM_ASSERT_VALID_EXT_RETURN
* Asserts a user mode VM handle is valid for external access.
*/
#define UVM_ASSERT_VALID_EXT_RETURN_VOID(a_pUVM) \
AssertMsgReturnVoid( RT_VALID_ALIGNED_PTR(a_pUVM, HOST_PAGE_SIZE_DYNAMIC) \
&& (a_pUVM)->u32Magic == UVM_MAGIC, \
("a_pUVM=%p u32Magic=%#x\n", (a_pUVM), \
RT_VALID_ALIGNED_PTR(a_pUVM, HOST_PAGE_SIZE_DYNAMIC) ? (a_pUVM)->u32Magic : 0))
/** @} */
#endif /* !VBOX_INCLUDED_vmm_uvm_h */
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