From 06623392351dfea54bd69507b6672c933a5e3fd2 Mon Sep 17 00:00:00 2001
From: Al Stone <ahs3@redhat.com>
Date: Sat, 19 Sep 2020 15:22:00 -0600
Subject: [PATCH 12/45] Support DMAR in a big-endian world

Signed-off-by: Al Stone <ahs3@redhat.com>
---
 source/common/dmtable.c    |  4 ++--
 source/common/dmtbdump1.c  | 26 +++++++++++++++-----------
 source/compiler/dttable1.c | 12 +++++++-----
 3 files changed, 24 insertions(+), 18 deletions(-)

Index: acpica-unix2-20210604/source/common/dmtable.c
===================================================================
--- acpica-unix2-20210604.orig/source/common/dmtable.c
+++ acpica-unix2-20210604/source/common/dmtable.c
@@ -1341,13 +1341,13 @@ AcpiDmDumpTable (
 
             /* DMAR subtable types */
 
-            Temp16 = ACPI_GET16 (Target);
+            Temp16 = AcpiUtReadUint16 (Target);
             if (Temp16 > ACPI_DMAR_TYPE_RESERVED)
             {
                 Temp16 = ACPI_DMAR_TYPE_RESERVED;
             }
 
-            AcpiOsPrintf (UINT16_FORMAT, ACPI_GET16 (Target),
+            AcpiOsPrintf (UINT16_FORMAT, Temp16,
                 AcpiDmDmarSubnames[Temp16]);
             break;
 
Index: acpica-unix2-20210604/source/common/dmtbdump1.c
===================================================================
--- acpica-unix2-20210604.orig/source/common/dmtbdump1.c
+++ acpica-unix2-20210604/source/common/dmtbdump1.c
@@ -604,13 +604,15 @@ AcpiDmDumpDmar (
 {
     ACPI_STATUS             Status;
     ACPI_DMAR_HEADER        *Subtable;
-    UINT32                  Length = Table->Length;
+    UINT32                  Length = AcpiUtReadUint32 (&Table->Length);
     UINT32                  Offset = sizeof (ACPI_TABLE_DMAR);
     ACPI_DMTABLE_INFO       *InfoTable;
     ACPI_DMAR_DEVICE_SCOPE  *ScopeTable;
     UINT32                  ScopeOffset;
     UINT8                   *PciPath;
     UINT32                  PathOffset;
+    UINT16                  SubtableType;
+    UINT16                  SubtableLength;
 
 
     /* Main table */
@@ -624,13 +626,14 @@ AcpiDmDumpDmar (
     /* Subtables */
 
     Subtable = ACPI_ADD_PTR (ACPI_DMAR_HEADER, Table, Offset);
-    while (Offset < Table->Length)
+    while (Offset < Length)
     {
         /* Common subtable header */
 
         AcpiOsPrintf ("\n");
+        SubtableLength = AcpiUtReadUint16 (&Subtable->Length);
         Status = AcpiDmDumpTable (Length, Offset, Subtable,
-            Subtable->Length, AcpiDmTableInfoDmarHdr);
+            SubtableLength, AcpiDmTableInfoDmarHdr);
         if (ACPI_FAILURE (Status))
         {
             return;
@@ -638,7 +641,8 @@ AcpiDmDumpDmar (
 
         AcpiOsPrintf ("\n");
 
-        switch (Subtable->Type)
+        SubtableType = AcpiUtReadUint16 (&Subtable->Type);
+        switch (SubtableType)
         {
         case ACPI_DMAR_TYPE_HARDWARE_UNIT:
 
@@ -673,12 +677,12 @@ AcpiDmDumpDmar (
         default:
 
             AcpiOsPrintf ("\n**** Unknown DMAR subtable type 0x%X\n\n",
-                Subtable->Type);
+                SubtableType);
             return;
         }
 
         Status = AcpiDmDumpTable (Length, Offset, Subtable,
-            Subtable->Length, InfoTable);
+            SubtableLength, InfoTable);
         if (ACPI_FAILURE (Status))
         {
             return;
@@ -687,8 +691,8 @@ AcpiDmDumpDmar (
         /*
          * Dump the optional device scope entries
          */
-        if ((Subtable->Type == ACPI_DMAR_TYPE_HARDWARE_AFFINITY) ||
-            (Subtable->Type == ACPI_DMAR_TYPE_NAMESPACE))
+        if ((SubtableType == ACPI_DMAR_TYPE_HARDWARE_AFFINITY) ||
+            (SubtableType == ACPI_DMAR_TYPE_NAMESPACE))
         {
             /* These types do not support device scopes */
 
@@ -696,7 +700,7 @@ AcpiDmDumpDmar (
         }
 
         ScopeTable = ACPI_ADD_PTR (ACPI_DMAR_DEVICE_SCOPE, Subtable, ScopeOffset);
-        while (ScopeOffset < Subtable->Length)
+        while (ScopeOffset < SubtableLength)
         {
             AcpiOsPrintf ("\n");
             Status = AcpiDmDumpTable (Length, Offset + ScopeOffset, ScopeTable,
@@ -737,9 +741,9 @@ AcpiDmDumpDmar (
 NextSubtable:
         /* Point to next subtable */
 
-        Offset += Subtable->Length;
+        Offset += SubtableLength;
         Subtable = ACPI_ADD_PTR (ACPI_DMAR_HEADER, Subtable,
-            Subtable->Length);
+            SubtableLength);
     }
 }
 
Index: acpica-unix2-20210604/source/compiler/dttable1.c
===================================================================
--- acpica-unix2-20210604.orig/source/compiler/dttable1.c
+++ acpica-unix2-20210604/source/compiler/dttable1.c
@@ -634,6 +634,7 @@ DtCompileDmar (
     ACPI_DMAR_DEVICE_SCOPE  *DmarDeviceScope;
     UINT32                  DeviceScopeLength;
     UINT32                  PciPathLength;
+    UINT16                  DmarHeaderType;
 
 
     Status = DtCompileTable (PFieldList, AcpiDmTableInfoDmar, &Subtable);
@@ -664,7 +665,8 @@ DtCompileDmar (
 
         DmarHeader = ACPI_CAST_PTR (ACPI_DMAR_HEADER, Subtable->Buffer);
 
-        switch (DmarHeader->Type)
+        DmarHeaderType = AcpiUtReadUint16 (&DmarHeader->Type);
+        switch (DmarHeaderType)
         {
         case ACPI_DMAR_TYPE_HARDWARE_UNIT:
 
@@ -711,8 +713,8 @@ DtCompileDmar (
         /*
          * Optional Device Scope subtables
          */
-        if ((DmarHeader->Type == ACPI_DMAR_TYPE_HARDWARE_AFFINITY) ||
-            (DmarHeader->Type == ACPI_DMAR_TYPE_NAMESPACE))
+        if ((DmarHeaderType == ACPI_DMAR_TYPE_HARDWARE_AFFINITY) ||
+            (DmarHeaderType == ACPI_DMAR_TYPE_NAMESPACE))
         {
             /* These types do not support device scopes */
 
@@ -721,8 +723,8 @@ DtCompileDmar (
         }
 
         DtPushSubtable (Subtable);
-        DeviceScopeLength = DmarHeader->Length - Subtable->Length -
-            ParentTable->Length;
+        DeviceScopeLength = AcpiUtReadUint16 (&DmarHeader->Length) -
+                Subtable->Length - ParentTable->Length;
         while (DeviceScopeLength)
         {
             Status = DtCompileTable (PFieldList, AcpiDmTableInfoDmarScope,