1 files changed, 140 insertions, 0 deletions
diff --git a/src/VBox/VMM/VMMR3/GIMMinimal.cpp b/src/VBox/VMM/VMMR3/GIMMinimal.cpp
new file mode 100644
index 00000000..48564eca
--- /dev/null
+++ b/src/VBox/VMM/VMMR3/GIMMinimal.cpp
@@ -0,0 +1,140 @@
+/* $Id: GIMMinimal.cpp $ */
+/** @file
+ * GIM - Guest Interface Manager, Minimal implementation.
+ */
+
+/*
+ * Copyright (C) 2014-2023 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                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP LOG_GROUP_GIM
+#include <VBox/vmm/gim.h>
+#include <VBox/vmm/cpum.h>
+#include <VBox/vmm/tm.h>
+#include <VBox/vmm/apic.h>
+#include "GIMInternal.h"
+#include <VBox/vmm/vm.h>
+
+#include <iprt/assert.h>
+#include <iprt/err.h>
+#include <iprt/string.h>
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+
+/**
+ * Initializes the Minimal provider.
+ *
+ * @returns VBox status code.
+ * @param   pVM     The cross context VM structure.
+ */
+VMMR3_INT_DECL(int) gimR3MinimalInit(PVM pVM)
+{
+    AssertReturn(pVM, VERR_INVALID_PARAMETER);
+    AssertReturn(pVM->gim.s.enmProviderId == GIMPROVIDERID_MINIMAL, VERR_INTERNAL_ERROR_5);
+
+    /*
+     * Expose HVP (Hypervisor Present) bit to the guest.
+     */
+    CPUMR3SetGuestCpuIdFeature(pVM, CPUMCPUIDFEATURE_HVP);
+
+    /*
+     * Insert the hypervisor leaf range.
+     */
+    CPUMCPUIDLEAF HyperLeaf;
+    RT_ZERO(HyperLeaf);
+    HyperLeaf.uLeaf = UINT32_C(0x40000000);
+    HyperLeaf.uEax  = UINT32_C(0x40000010); /* Maximum leaf we implement. */
+    int rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
+    if (RT_SUCCESS(rc))
+    {
+        /*
+         * Insert missing zero leaves (you never know what missing leaves are
+         * going to return when read).
+         */
+        RT_ZERO(HyperLeaf);
+        for (uint32_t uLeaf = UINT32_C(0x40000001); uLeaf <= UINT32_C(0x40000010); uLeaf++)
+        {
+            HyperLeaf.uLeaf = uLeaf;
+            rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
+            AssertLogRelRCReturn(rc, rc);
+        }
+    }
+    else
+        LogRel(("GIM: Minimal: Failed to insert hypervisor leaf %#RX32. rc=%Rrc\n", HyperLeaf.uLeaf, rc));
+
+    return rc;
+}
+
+
+/**
+ * Initializes remaining bits of the Minimal provider.
+ * This is called after initializing HM and almost all other VMM components.
+ *
+ * @returns VBox status code.
+ * @param   pVM     The cross context VM structure.
+ */
+VMMR3_INT_DECL(int) gimR3MinimalInitCompleted(PVM pVM)
+{
+    /*
+     * Expose a generic hypervisor-agnostic leaf (originally defined by VMware).
+     * The leaves range from  0x40000010 to 0x400000FF.
+     *
+     * This is done in the init. completed routine as we need PDM to be
+     * initialized (otherwise APICGetTimerFreq() would fail).
+     */
+    CPUMCPUIDLEAF HyperLeaf;
+    int rc = CPUMR3CpuIdGetLeaf(pVM, &HyperLeaf, 0x40000000, 0 /* uSubLeaf */);
+    if (RT_SUCCESS(rc))
+    {
+        Assert(HyperLeaf.uEax >= 0x40000010);
+
+        /*
+         * Add the timing information hypervisor leaf.
+         * MacOS X uses this to determine the TSC, bus frequency. See @bugref{7270}.
+         *
+         * EAX - TSC frequency in KHz.
+         * EBX - APIC frequency in KHz.
+         * ECX, EDX - Reserved.
+         */
+        uint64_t uApicFreq;
+        rc = APICGetTimerFreq(pVM, &uApicFreq);
+        AssertLogRelRCReturn(rc, rc);
+
+        RT_ZERO(HyperLeaf);
+        HyperLeaf.uLeaf        = UINT32_C(0x40000010);
+        HyperLeaf.uEax         = TMCpuTicksPerSecond(pVM) / UINT64_C(1000);
+        HyperLeaf.uEbx         = (uApicFreq + 500) / UINT64_C(1000);
+        rc = CPUMR3CpuIdInsert(pVM, &HyperLeaf);
+        AssertLogRelRCReturn(rc, rc);
+    }
+    else
+        LogRel(("GIM: Minimal: failed to get hypervisor leaf 0x40000000. rc=%Rrc\n", rc));
+
+    return VINF_SUCCESS;
+}
+