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, 92 insertions, 0 deletions

diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PagingInitRootForPAE.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PagingInitRootForPAE.c
new file mode 100644
index 00000000..828aeda2
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-PagingInitRootForPAE.c
@@ -0,0 +1,92 @@
+/* $Id: bs3-cmn-PagingInitRootForPAE.c $ */
+/** @file
+ * BS3Kit - Bs3PagingInitRootForPAE
+ */
+
+/*
+ * Copyright (C) 2007-2019 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.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "bs3kit-template-header.h"
+#include "bs3-cmn-paging.h"
+
+
+#undef Bs3PagingInitRootForPAE
+BS3_CMN_DEF(int, Bs3PagingInitRootForPAE,(void))
+{
+    X86PDPT BS3_FAR *pPdPtr;
+
+    BS3_ASSERT(g_PhysPagingRootPAE == UINT32_MAX);
+
+    /*
+     * By default we do a identity mapping of the entire address space
+     * using 2 GB pages.  So, we need four page directories and one page
+     * directory pointer table with 4 entries.  (We cannot share the PDPT with
+     * long mode because of reserved bit which will cause fatal trouble.)
+     *
+     * We assume that the availability of PAE means that PSE is available too.
+     */
+/** @todo testcase: loading invalid PDPTREs will tripple fault the CPU, won't it? We guru with invalid guest state. */
+    pPdPtr = (X86PDPT BS3_FAR *)Bs3MemAlloc(BS3MEMKIND_TILED, sizeof(X86PDPE) * 4U);
+    if (pPdPtr)
+    {
+        X86PDPAE BS3_FAR *paPgDirs;
+        BS3_ASSERT(((uintptr_t)pPdPtr & 0x3f) == 0);
+
+        paPgDirs = (X86PDPAE BS3_FAR *)Bs3MemAlloc(BS3MEMKIND_TILED, _4K * 4U);
+        if (paPgDirs)
+        {
+            unsigned i;
+            BS3_XPTR_AUTO(X86PDPT, XPtrPdPtr);
+            BS3_XPTR_AUTO(X86PDPAE, XPtrPgDirs);
+
+            /* Set up the 2048 2MB pages first. */
+            for (i = 0; i < RT_ELEMENTS(paPgDirs->a) * 4U; i++)
+                paPgDirs->a[i].u = ((uint32_t)i << X86_PD_PAE_SHIFT)
+                                 | X86_PDE4M_P | X86_PDE4M_RW | X86_PDE4M_US | X86_PDE4M_PS | X86_PDE4M_A | X86_PDE4M_D;
+
+            /* Set up the four page directory pointer table entries. */
+            BS3_XPTR_SET(X86PDPAE, XPtrPgDirs, paPgDirs);
+            pPdPtr->a[0].u = BS3_XPTR_GET_FLAT(X86PDPAE, XPtrPgDirs) | X86_PDPE_P;
+            pPdPtr->a[1].u = pPdPtr->a[0].u + _4K;
+            pPdPtr->a[2].u = pPdPtr->a[1].u + _4K;
+            pPdPtr->a[3].u = pPdPtr->a[2].u + _4K;
+
+            /* Free up 8 consequtive entries for raw-mode hypervisor code. */
+            if (1) /** @todo detect raw-mode and only do this then. */
+                for (i = 0; i < 8; i++)
+                    paPgDirs->a[i + (UINT32_C(0xc0000000) >> X86_PD_PAE_SHIFT)].b.u1Present = 0;
+
+            /* Set the global root pointer and we're done. */
+            BS3_XPTR_SET(X86PDPT, XPtrPdPtr, pPdPtr);
+            g_PhysPagingRootPAE = BS3_XPTR_GET_FLAT(X86PDPT, XPtrPdPtr);
+            return VINF_SUCCESS;
+        }
+        BS3_ASSERT(false);
+        Bs3MemFree(pPdPtr, _4K);
+    }
+    BS3_ASSERT(false);
+    return VERR_NO_MEMORY;
+}
+