source: vbox/trunk/include/VBox/vmm/cpum-armv8.h@ 99051

/** @file
 * CPUM - CPU Monitor(/ Manager).
 */

/*
 * Copyright (C) 2006-2023 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>.
 *
 * 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_cpum_armv8_h
#define VBOX_INCLUDED_vmm_cpum_armv8_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif

#include <VBox/types.h>

RT_C_DECLS_BEGIN

/** @defgroup grp_cpum      The CPU Monitor / Manager API
 * @ingroup grp_vmm
 * @{
 */

/**
 * CPU features and quirks.
 * This is mostly exploded CPUID info.
 */
typedef struct CPUMFEATURES
{
    /** The CPU vendor (CPUMCPUVENDOR). */
    uint8_t         enmCpuVendor;
    /** The CPU family. */
    uint8_t         uFamily;
    /** The CPU model. */
    uint8_t         uModel;
    /** The CPU stepping. */
    uint8_t         uStepping;
    /** The microarchitecture. */
#ifndef VBOX_FOR_DTRACE_LIB
    CPUMMICROARCH   enmMicroarch;
#else
    uint32_t        enmMicroarch;
#endif
    /** The maximum physical address width of the CPU. */
    uint8_t         cMaxPhysAddrWidth;
    /** The maximum linear address width of the CPU. */
    uint8_t         cMaxLinearAddrWidth;

    /** Padding to the required size to match CPUMFEATURES for x86/amd64. */
    uint8_t         abPadding[48 - 10];
} CPUMFEATURES;
#ifndef VBOX_FOR_DTRACE_LIB
AssertCompileSize(CPUMFEATURES, 48);
#endif
/** Pointer to a CPU feature structure. */
typedef CPUMFEATURES *PCPUMFEATURES;
/** Pointer to a const CPU feature structure. */
typedef CPUMFEATURES const *PCCPUMFEATURES;

/**
 * Chameleon wrapper structure for the host CPU features.
 *
 * This is used for the globally readable g_CpumHostFeatures variable, which is
 * initialized once during VMMR0 load for ring-0 and during CPUMR3Init in
 * ring-3.  To reflect this immutability after load/init, we use this wrapper
 * structure to switch it between const and non-const depending on the context.
 * Only two files sees it as non-const (CPUMR0.cpp and CPUM.cpp).
 */
typedef struct CPUHOSTFEATURES
{
    CPUMFEATURES
#ifndef CPUM_WITH_NONCONST_HOST_FEATURES
    const
#endif
                    s;
} CPUHOSTFEATURES;
/** Pointer to a const host CPU feature structure. */
typedef CPUHOSTFEATURES const *PCCPUHOSTFEATURES;

/** Host CPU features.
 * @note In ring-3, only valid after CPUMR3Init.  In ring-0, valid after
 *       module init. */
extern CPUHOSTFEATURES g_CpumHostFeatures;


/**
 * CPU database entry.
 */
typedef struct CPUMDBENTRY
{
    /** The CPU name. */
    const char     *pszName;
    /** The full CPU name. */
    const char     *pszFullName;
    /** The CPU vendor (CPUMCPUVENDOR). */
    uint8_t         enmVendor;
    /** The CPU family. */
    uint8_t         uFamily;
    /** The CPU model. */
    uint8_t         uModel;
    /** The CPU stepping. */
    uint8_t         uStepping;
    /** The microarchitecture. */
    CPUMMICROARCH   enmMicroarch;
    /** Scalable bus frequency used for reporting other frequencies. */
    uint64_t        uScalableBusFreq;
    /** Flags - CPUMDB_F_XXX. */
    uint32_t        fFlags;
    /** The maximum physical address with of the CPU.  This should correspond to
     * the value in CPUID leaf 0x80000008 when present. */
    uint8_t         cMaxPhysAddrWidth;
} CPUMDBENTRY;
/** Pointer to a const CPU database entry. */
typedef CPUMDBENTRY const *PCCPUMDBENTRY;


/** @name Changed flags.
 * These flags are used to keep track of which important register that
 * have been changed since last they were reset. The only one allowed
 * to clear them is REM!
 *
 * @todo This is obsolete, but remains as it will be refactored for coordinating
 *       IEM and NEM/HM later. Probably.
 * @{
 */
#define CPUM_CHANGED_GLOBAL_TLB_FLUSH           RT_BIT(0)
#define CPUM_CHANGED_ALL                        ( CPUM_CHANGED_GLOBAL_TLB_FLUSH )
/** @} */

/** @} */
RT_C_DECLS_END


#endif /* !VBOX_INCLUDED_vmm_cpum_armv8_h */