From a5d47ff72b16fb2b8f07e702580a04b2154a938b Mon Sep 17 00:00:00 2001
From: Timo Kreuzer <timo.kreuzer@reactos.org>
Date: Mon, 29 Jan 2018 12:39:21 +0100
Subject: [PATCH] [NTOS:MM:X64] On x64 reserve the address range between
 FFFF800000000000 and FFFFF68000000000 in MiInitSystemMemoryAreas()

---
 ntoskrnl/mm/mminit.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ntoskrnl/mm/mminit.c b/ntoskrnl/mm/mminit.c
index 4005b34e0f9..3bb75db87ea 100644
--- a/ntoskrnl/mm/mminit.c
+++ b/ntoskrnl/mm/mminit.c
@@ -70,6 +70,11 @@ MiInitSystemMemoryAreas(VOID)
     // Create all the static memory areas.
     //
 
+#ifdef _M_AMD64
+    // Reserved range FFFF800000000000 - FFFFF68000000000
+    MiCreateArm3StaticMemoryArea((PVOID)MI_REAL_SYSTEM_RANGE_START, PTE_BASE - MI_REAL_SYSTEM_RANGE_START, FALSE);
+#endif /* _M_AMD64 */
+
     // The loader mappings. The only Executable area.
     MiCreateArm3StaticMemoryArea((PVOID)KSEG0_BASE, MmBootImageSize, TRUE);