1 files changed, 118 insertions, 0 deletions
diff --git a/src/VBox/VMM/VMMAll/PDMAllCritSectBoth.cpp b/src/VBox/VMM/VMMAll/PDMAllCritSectBoth.cpp
new file mode 100644
index 00000000..3c9fb021
--- /dev/null
+++ b/src/VBox/VMM/VMMAll/PDMAllCritSectBoth.cpp
@@ -0,0 +1,118 @@
+/* $Id: PDMAllCritSectBoth.cpp $ */
+/** @file
+ * PDM - Code Common to Both Critical Section Types, All Contexts.
+ */
+
+/*
+ * Copyright (C) 2006-2023 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_PDM_CRITSECT
+#include "PDMInternal.h"
+#include <VBox/vmm/pdmcritsect.h>
+#include <VBox/vmm/pdmcritsectrw.h>
+#include <VBox/vmm/vmcc.h>
+#include <iprt/errcore.h>
+
+#include <VBox/log.h>
+#include <iprt/assert.h>
+#include <iprt/asm.h>
+
+
+#if defined(IN_RING3) /*|| defined(IN_RING0) - not called from ring-0 */
+/**
+ * Process the critical sections (both types) queued for ring-3 'leave'.
+ *
+ * @param   pVM           The cross context VM structure.
+ * @param   pVCpu         The cross context virtual CPU structure.
+ */
+VMM_INT_DECL(void) PDMCritSectBothFF(PVMCC pVM, PVMCPUCC pVCpu)
+{
+    uint32_t i;
+    Assert(   pVCpu->pdm.s.cQueuedCritSectLeaves       > 0
+           || pVCpu->pdm.s.cQueuedCritSectRwShrdLeaves > 0
+           || pVCpu->pdm.s.cQueuedCritSectRwExclLeaves > 0);
+
+    /* Shared leaves. */
+    i = pVCpu->pdm.s.cQueuedCritSectRwShrdLeaves;
+    pVCpu->pdm.s.cQueuedCritSectRwShrdLeaves = 0;
+    while (i-- > 0)
+    {
+# ifdef IN_RING3
+        PPDMCRITSECTRW pCritSectRw = pVCpu->pdm.s.apQueuedCritSectRwShrdLeaves[i];
+# else
+        PPDMCRITSECTRW pCritSectRw = (PPDMCRITSECTRW)MMHyperR3ToCC(pVCpu->CTX_SUFF(pVM),
+                                                                   pVCpu->pdm.s.apQueuedCritSectRwShrdLeaves[i]);
+# endif
+
+        pdmCritSectRwLeaveSharedQueued(pVM, pCritSectRw);
+        LogIt(RTLOGGRPFLAGS_FLOW, LOG_GROUP_PDM_CRITSECTRW, ("PDMR3CritSectFF: %p (shared)\n", pCritSectRw));
+    }
+
+    /* Last, exclusive leaves. */
+    i = pVCpu->pdm.s.cQueuedCritSectRwExclLeaves;
+    pVCpu->pdm.s.cQueuedCritSectRwExclLeaves = 0;
+    while (i-- > 0)
+    {
+# ifdef IN_RING3
+        PPDMCRITSECTRW pCritSectRw = pVCpu->pdm.s.apQueuedCritSectRwExclLeaves[i];
+# else
+        PPDMCRITSECTRW pCritSectRw = (PPDMCRITSECTRW)MMHyperR3ToCC(pVCpu->CTX_SUFF(pVM),
+                                                                   pVCpu->pdm.s.apQueuedCritSectRwExclLeaves[i]);
+# endif
+
+        pdmCritSectRwLeaveExclQueued(pVM, pCritSectRw);
+        LogIt(RTLOGGRPFLAGS_FLOW, LOG_GROUP_PDM_CRITSECTRW, ("PDMR3CritSectFF: %p (exclusive)\n", pCritSectRw));
+    }
+
+    /* Normal leaves. */
+    i = pVCpu->pdm.s.cQueuedCritSectLeaves;
+    pVCpu->pdm.s.cQueuedCritSectLeaves = 0;
+    while (i-- > 0)
+    {
+# ifdef IN_RING3
+        PPDMCRITSECT pCritSect = pVCpu->pdm.s.apQueuedCritSectLeaves[i];
+# else
+        PPDMCRITSECT pCritSect = (PPDMCRITSECT)MMHyperR3ToCC(pVCpu->CTX_SUFF(pVM), pVCpu->pdm.s.apQueuedCritSectLeaves[i]);
+# endif
+        Assert(pCritSect->s.Core.NativeThreadOwner == pVCpu->hNativeThread);
+
+        /* Note! We *must* clear the pending-unlock flag here and not depend on
+                 PDMCritSectLeave to do it, as the EMT might be sitting on
+                 further nestings since it queued the section to be left, and
+                 leaving it set would throw subsequent PDMCritSectIsOwner calls.
+
+                 This will happen with the PGM lock if we nip back to ring-3 for
+                 more handy pages or similar where the lock is supposed to be
+                 held while in ring-3. */
+        ASMAtomicAndU32(&pCritSect->s.Core.fFlags, ~PDMCRITSECT_FLAGS_PENDING_UNLOCK);
+        PDMCritSectLeave(pVM, pCritSect);
+        LogFlow(("PDMR3CritSectFF: %p\n", pCritSect));
+    }
+
+    VMCPU_FF_CLEAR(pVCpu, VMCPU_FF_PDM_CRITSECT);
+}
+#endif /* IN_RING3 || IN_RING0 */
+