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Diffstat (limited to 'include/VBox/vmm/cpuidcall.h')
| -rw-r--r-- | include/VBox/vmm/cpuidcall.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/include/VBox/vmm/cpuidcall.h b/include/VBox/vmm/cpuidcall.h new file mode 100644 index 00000000..8bcdb8da --- /dev/null +++ b/include/VBox/vmm/cpuidcall.h @@ -0,0 +1,107 @@ +/** @file + * VM - The Virtual Machine, CPU Host Call Interface (AMD64 & x86 only). + * + * @note cpuidcall.mac is generated from this file by running 'kmk incs' in the root. + */ + +/* + * Copyright (C) 2022 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_cpuidcall_h +#define VBOX_INCLUDED_vmm_cpuidcall_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <VBox/types.h> + + +/** @defgroup grp_cpuidcall VBox CPUID Host Call Interface (AMD64 & x86) + * + * This describes an interface using CPUID for calling the host from within the + * VM. This is chiefly intended for nested VM debugging at present and is + * therefore disabled by default. + * + * @{ */ + +/** Fixed EAX value for all requests (big-endian 'VBox'). */ +#define VBOX_CPUID_REQ_EAX_FIXED UINT32_C(0x56426f78) +/** Fixed portion of ECX for all requests. */ +#define VBOX_CPUID_REQ_ECX_FIXED UINT32_C(0xc0de0000) +/** Fixed portion of ECX for all requests. */ +#define VBOX_CPUID_REQ_ECX_FIXED_MASK UINT32_C(0xffff0000) +/** Function part of ECX for requests. */ +#define VBOX_CPUID_REQ_ECX_FN_MASK UINT32_C(0x0000ffff) + +/** Generic ECX return value. */ +#define VBOX_CPUID_RESP_GEN_ECX UINT32_C(0x19410612) +/** Generic EDX return value. */ +#define VBOX_CPUID_RESP_GEN_EDX UINT32_C(0x19400412) +/** Generic EBX return value. */ +#define VBOX_CPUID_RESP_GEN_EBX UINT32_C(0x19450508) + +/** @name Function \#1: Interface ID check and max function. + * + * Input: EDX & EBX content is unused and ignored. Best set to zero. + * + * Result: EAX:EDX:EBX forms the little endian string "VBox RuleZ!\0". + * ECX contains the max function number acccepted. + * @{ */ +#define VBOX_CPUID_FN_ID UINT32_C(0x0001) +#define VBOX_CPUID_RESP_ID_EAX UINT32_C(0x786f4256) +#define VBOX_CPUID_RESP_ID_EDX UINT32_C(0x6c755220) +#define VBOX_CPUID_RESP_ID_EBX UINT32_C(0x00215A65) +#define VBOX_CPUID_RESP_ID_ECX UINT32_C(0x00000002) +/** @} */ + +/** Function \#2: Write string to host Log. + * + * Input: EDX gives the number of bytes to log (max 2MB). + * EBX indicates the log to write to: 0 for debug, 1 for release. + * RSI is the FLAT pointer to the UTF-8 string to log. + * + * Output: EAX contains IPRT status code. ECX, EDX and EBX are set to the + * generic their response values (VBOX_CPUID_RESP_GEN_XXX). RSI is + * advanced EDX bytes on success. + * + * Except: May raise \#PF when reading the string. RSI and EDX is then be + * updated to the point where the page fault triggered, allowing paging + * in of logging buffer and such like. + * + * @note Buffer is not accessed if the target logger isn't enabled. + */ +#define VBOX_CPUID_FN_LOG UINT32_C(0x0002) + + +/** @} */ + +#endif /* !VBOX_INCLUDED_vmm_cpuidcall_h */ + |