summaryrefslogtreecommitdiffstats
path: root/include/VBox/vmm/cpuidcall.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/VBox/vmm/cpuidcall.h')
-rw-r--r--include/VBox/vmm/cpuidcall.h107
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..d491555c
--- /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) 2022-2023 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_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 */
+