1 files changed, 64 insertions, 0 deletions
diff --git a/src/VBox/VMM/tools/VBoxCpuReportMsrSup.cpp b/src/VBox/VMM/tools/VBoxCpuReportMsrSup.cpp
new file mode 100644
index 00000000..86c00d41
--- /dev/null
+++ b/src/VBox/VMM/tools/VBoxCpuReportMsrSup.cpp
@@ -0,0 +1,64 @@
+/* $Id: VBoxCpuReportMsrSup.cpp $ */
+/** @file
+ * MsrSup - SupDrv-specific MSR access.
+ */
+
+/*
+ * Copyright (C) 2013-2023 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                                                                                                                 *
+*********************************************************************************************************************************/
+#include "VBoxCpuReport.h"
+#include <iprt/errcore.h>
+#include <iprt/x86.h>
+
+
+int VbCpuRepMsrProberInitSupDrv(PVBCPUREPMSRACCESSORS pMsrFunctions)
+{
+    int rc = SUPR3Init(NULL);
+    if (RT_SUCCESS(rc))
+    {
+        /* Test if the MSR prober is available, since the interface is optional. The TSC MSR will exist on any supported CPU. */
+        uint64_t uValue;
+        bool     fGp;
+        rc = SUPR3MsrProberRead(MSR_IA32_TSC, NIL_RTCPUID, &uValue, &fGp);
+        if (   rc != VERR_NOT_IMPLEMENTED
+            && rc != VERR_INVALID_FUNCTION)
+        {
+            pMsrFunctions->fAtomic            = true;
+            pMsrFunctions->pfnMsrProberRead   = SUPR3MsrProberRead;
+            pMsrFunctions->pfnMsrProberWrite  = SUPR3MsrProberWrite;
+            pMsrFunctions->pfnMsrProberModify = SUPR3MsrProberModify;
+
+            pMsrFunctions->pfnTerm            = NULL;
+            return VINF_SUCCESS;
+
+        }
+        vbCpuRepDebug("warning: MSR probing not supported by the support driver (%Rrc).\n", rc);
+    }
+    else
+        vbCpuRepDebug("warning: Unable to initialize the support library (%Rrc).\n", rc);
+    return rc;
+}
+