Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 119 insertions, 0 deletions

diff --git a/src/VBox/VMM/VMMR0/GIMR0Kvm.cpp b/src/VBox/VMM/VMMR0/GIMR0Kvm.cpp
new file mode 100644
index 00000000..bcc849db
--- /dev/null
+++ b/src/VBox/VMM/VMMR0/GIMR0Kvm.cpp
@@ -0,0 +1,119 @@
+/* $Id: GIMR0Kvm.cpp $ */
+/** @file
+ * Guest Interface Manager (GIM), KVM - Host Context Ring-0.
+ */
+
+/*
+ * Copyright (C) 2015-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#define LOG_GROUP LOG_GROUP_GIM
+#include <VBox/vmm/gim.h>
+#include <VBox/vmm/tm.h>
+#include "GIMInternal.h"
+#include "GIMKvmInternal.h"
+#include <VBox/vmm/vm.h>
+
+#include <VBox/err.h>
+
+#include <iprt/spinlock.h>
+
+
+/**
+ * Updates KVM's system time information globally for all VCPUs.
+ *
+ * @returns VBox status code.
+ * @param   pVM         The cross context VM structure.
+ * @param   pVCpu       The cross context virtual CPU structure.
+ * @thread  EMT.
+ * @remarks Can be called with preemption disabled!
+ */
+VMM_INT_DECL(int) gimR0KvmUpdateSystemTime(PVM pVM, PVMCPU pVCpu)
+{
+    /*
+     * Validate.
+     */
+    Assert(GIMIsEnabled(pVM));
+    PGIMKVM pKvm = &pVM->gim.s.u.Kvm;
+    AssertReturn(pKvm->hSpinlockR0 != NIL_RTSPINLOCK, VERR_GIM_IPE_3);
+
+    /*
+     * Record the TSC and virtual NanoTS pairs.
+     */
+    uint64_t uTsc;
+    uint64_t uVirtNanoTS;
+    RTCCUINTREG fEFlags = ASMIntDisableFlags();
+    uTsc        = TMCpuTickGetNoCheck(pVCpu) | UINT64_C(1);
+    uVirtNanoTS = TMVirtualGetNoCheck(pVM)   | UINT64_C(1);
+    ASMSetFlags(fEFlags);
+
+    /*
+     * Update VCPUs with this information. The first VCPU's values
+     * will be applied to the remaining.
+     */
+    RTSpinlockAcquire(pKvm->hSpinlockR0);
+    for (uint32_t i = 0; i < pVM->cCpus; i++)
+    {
+        PGIMKVMCPU pKvmCpu = &pVM->aCpus[i].gim.s.u.KvmCpu;
+        if (   !pKvmCpu->uTsc
+            && !pKvmCpu->uVirtNanoTS)
+        {
+            pKvmCpu->uTsc        = uTsc;
+            pKvmCpu->uVirtNanoTS = uVirtNanoTS;
+        }
+    }
+    RTSpinlockRelease(pKvm->hSpinlockR0);
+
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Does ring-0 per-VM GIM KVM initialization.
+ *
+ * @returns VBox status code.
+ * @param   pVM     The cross context VM structure.
+ */
+VMMR0_INT_DECL(int) gimR0KvmInitVM(PVM pVM)
+{
+    AssertPtr(pVM);
+    Assert(GIMIsEnabled(pVM));
+
+    PGIMKVM pKvm = &pVM->gim.s.u.Kvm;
+    Assert(pKvm->hSpinlockR0 == NIL_RTSPINLOCK);
+
+    int rc = RTSpinlockCreate(&pKvm->hSpinlockR0, RTSPINLOCK_FLAGS_INTERRUPT_UNSAFE, "KVM");
+    return rc;
+}
+
+
+/**
+ * Does ring-0 per-VM GIM KVM termination.
+ *
+ * @returns VBox status code.
+ * @param   pVM     The cross context VM structure.
+ */
+VMMR0_INT_DECL(int) gimR0KvmTermVM(PVM pVM)
+{
+    AssertPtr(pVM);
+    Assert(GIMIsEnabled(pVM));
+
+    PGIMKVM pKvm = &pVM->gim.s.u.Kvm;
+    RTSpinlockDestroy(pKvm->hSpinlockR0);
+    pKvm->hSpinlockR0 = NIL_RTSPINLOCK;
+
+    return VINF_SUCCESS;
+}
+