[edk2-devel] [Patch v2 2/2] MdeModulePkg/Core/Dxe: Set MemoryTypeInfo bin range from HOB

["Michael D Kinney" <michael.d.kinney@intel.com>]

Provide an optional method for PEI to declare a specific address
range to use for the Memory Type Information bins. The current
algorithm uses heuristics that tends to place the Memory Type
Information bins in the same location, but memory configuration
changes across boots or algorithm changes across a firmware
updates could potentially change the Memory Type Information bin
location.

If the HOB List contains a Resource Descriptor HOB that
describes tested system memory and has an Owner GUID of
gEfiMemoryTypeInformationGuid, then use the address range
described by the Resource Descriptor HOB as the preferred
location of the Memory Type Information bins. If this HOB is
not detected, then the current behavior is preserved.

The HOB with an Owner GUID of gEfiMemoryTypeInformationGuid
is ignored for the following conditions:
* The HOB with an Owner GUID of gEfiMemoryTypeInformationGuid
  is smaller than the Memory Type Information bins.
* The HOB list contains more than one Resource Descriptor HOB
  with an owner GUID of gEfiMemoryTypeInformationGuid.
* The Resource Descriptor HOB with an Owner GUID of
  gEfiMemoryTypeInformationGuid is the same Resource Descriptor
  HOB that that describes the PHIT memory range.

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Aaron Li <aaron.li@intel.com>
Cc: Liu Yun <yun.y.liu@intel.com>
Cc: Andrew Fish <afish@apple.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
---
 MdeModulePkg/Core/Dxe/DxeMain.h               |   6 ++
 MdeModulePkg/Core/Dxe/Gcd/Gcd.c               |  72 ++++++++++++-
 MdeModulePkg/Core/Dxe/Mem/Page.c              | 101 ++++++++++++++++++
 .../Include/Guid/MemoryTypeInformation.h      |  14 ++-
 4 files changed, 185 insertions(+), 8 deletions(-)

diff --git a/MdeModulePkg/Core/Dxe/DxeMain.h b/MdeModulePkg/Core/Dxe/DxeMain.h
index 86a7be2f5188..53e26703f8c7 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.h
+++ b/MdeModulePkg/Core/Dxe/DxeMain.h
@@ -277,6 +277,12 @@ CoreInitializePool (
   VOID
   );
 
+VOID
+CoreSetMemoryTypeInformationRange (
+  IN EFI_PHYSICAL_ADDRESS  Start,
+  IN UINT64                Length
+  );
+
 /**
   Called to initialize the memory map and add descriptors to
   the current descriptor list.
diff --git a/MdeModulePkg/Core/Dxe/Gcd/Gcd.c b/MdeModulePkg/Core/Dxe/Gcd/Gcd.c
index 792cd2e0af23..c450d1bf2531 100644
--- a/MdeModulePkg/Core/Dxe/Gcd/Gcd.c
+++ b/MdeModulePkg/Core/Dxe/Gcd/Gcd.c
@@ -2238,6 +2238,8 @@ CoreInitializeMemoryServices (
   EFI_HOB_HANDOFF_INFO_TABLE   *PhitHob;
   EFI_HOB_RESOURCE_DESCRIPTOR  *ResourceHob;
   EFI_HOB_RESOURCE_DESCRIPTOR  *PhitResourceHob;
+  EFI_HOB_RESOURCE_DESCRIPTOR  *MemoryTypeInformationResourceHob;
+  UINTN                        Count;
   EFI_PHYSICAL_ADDRESS         BaseAddress;
   UINT64                       Length;
   UINT64                       Attributes;
@@ -2289,12 +2291,47 @@ CoreInitializeMemoryServices (
   //
   // See if a Memory Type Information HOB is available
   //
-  GuidHob = GetFirstGuidHob (&gEfiMemoryTypeInformationGuid);
+  MemoryTypeInformationResourceHob = NULL;
+  GuidHob                          = GetFirstGuidHob (&gEfiMemoryTypeInformationGuid);
   if (GuidHob != NULL) {
     EfiMemoryTypeInformation = GET_GUID_HOB_DATA (GuidHob);
     DataSize                 = GET_GUID_HOB_DATA_SIZE (GuidHob);
     if ((EfiMemoryTypeInformation != NULL) && (DataSize > 0) && (DataSize <= (EfiMaxMemoryType + 1) * sizeof (EFI_MEMORY_TYPE_INFORMATION))) {
       CopyMem (&gMemoryTypeInformation, EfiMemoryTypeInformation, DataSize);
+
+      //
+      // Look for Resource Descriptor HOB with a ResourceType of System Memory
+      // and an Owner GUID of gEfiMemoryTypeInformationGuid. If more than 1 is
+      // found, then set MemoryTypeInformationResourceHob to NULL.
+      //
+      Count = 0;
+      for (Hob.Raw = *HobStart; !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) {
+        if (GET_HOB_TYPE (Hob) != EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) {
+          continue;
+        }
+
+        ResourceHob = Hob.ResourceDescriptor;
+        if (!CompareGuid (&ResourceHob->Owner, &gEfiMemoryTypeInformationGuid)) {
+          continue;
+        }
+
+        Count++;
+        if (ResourceHob->ResourceType != EFI_RESOURCE_SYSTEM_MEMORY) {
+          continue;
+        }
+
+        if ((ResourceHob->ResourceAttribute & MEMORY_ATTRIBUTE_MASK) != TESTED_MEMORY_ATTRIBUTES) {
+          continue;
+        }
+
+        if (ResourceHob->ResourceLength >= CalculateTotalMemoryBinSizeNeeded ()) {
+          MemoryTypeInformationResourceHob = ResourceHob;
+        }
+      }
+
+      if (Count > 1) {
+        MemoryTypeInformationResourceHob = NULL;
+      }
     }
   }
 
@@ -2344,6 +2381,15 @@ CoreInitializeMemoryServices (
     PhitResourceHob = ResourceHob;
     Found           = TRUE;
 
+    //
+    // If a Memory Type Information Resource HOB was found and is the same
+    // Resource HOB that describes the PHIT HOB, then ignore the Memory Type
+    // Information Resource HOB.
+    //
+    if (MemoryTypeInformationResourceHob == PhitResourceHob) {
+      MemoryTypeInformationResourceHob = NULL;
+    }
+
     //
     // Compute range between PHIT EfiMemoryTop and the end of the Resource Descriptor HOB
     //
@@ -2387,8 +2433,9 @@ CoreInitializeMemoryServices (
   if (Length < MinimalMemorySizeNeeded) {
     //
     // Search all the resource descriptor HOBs from the highest possible addresses down for a memory
-    // region that is big enough to initialize the DXE core.  Always skip the PHIT Resource HOB.
-    // The max address must be within the physically addressible range for the processor.
+    // region that is big enough to initialize the DXE core.  Always skip the PHIT Resource HOB
+    // and the Memory Type Information Resource HOB. The max address must be within the physically
+    // addressable range for the processor.
     //
     HighAddress = MAX_ALLOC_ADDRESS;
     for (Hob.Raw = *HobStart; !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) {
@@ -2399,6 +2446,13 @@ CoreInitializeMemoryServices (
         continue;
       }
 
+      //
+      // Skip the Resource Descriptor HOB that contains Memory Type Information bins
+      //
+      if (Hob.ResourceDescriptor == MemoryTypeInformationResourceHob) {
+        continue;
+      }
+
       //
       // Skip all HOBs except Resource Descriptor HOBs
       //
@@ -2466,6 +2520,18 @@ CoreInitializeMemoryServices (
     Capabilities = CoreConvertResourceDescriptorHobAttributesToCapabilities (EfiGcdMemoryTypeSystemMemory, Attributes);
   }
 
+  if (MemoryTypeInformationResourceHob != NULL) {
+    //
+    // If a Memory Type Information Resource HOB was found, then use the address
+    // range of the  Memory Type Information Resource HOB as the preferred
+    // address range for the Memory Type Information bins.
+    //
+    CoreSetMemoryTypeInformationRange (
+      MemoryTypeInformationResourceHob->PhysicalStart,
+      MemoryTypeInformationResourceHob->ResourceLength
+      );
+  }
+
   //
   // Declare the very first memory region, so the EFI Memory Services are available.
   //
diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index 6497af573353..458c62090265 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -532,6 +532,107 @@ CoreLoadingFixedAddressHook (
   return;
 }
 
+/**
+  Sets the preferred memory range to use for the Memory Type Information bins.
+  This service must be called before fist call to CoreAddMemoryDescriptor().
+
+  If the location of the Memory Type Information bins has already been
+  established or the size of the range provides is smaller than all the
+  Memory Type Information bins, then the range provides is not used.
+
+  @param  Start   The start address of the Memory Type Information range.
+  @param  Length  The size, in bytes, of the Memory Type Information range.
+**/
+VOID
+CoreSetMemoryTypeInformationRange (
+  IN EFI_PHYSICAL_ADDRESS  Start,
+  IN UINT64                Length
+  )
+{
+  EFI_PHYSICAL_ADDRESS  Top;
+  EFI_MEMORY_TYPE       Type;
+  UINTN                 Index;
+  UINTN                 Size;
+
+  //
+  // Return if Memory Type Information bin locations have already been set
+  //
+  if (mMemoryTypeInformationInitialized) {
+    return;
+  }
+
+  //
+  // Return if size of the Memory Type Information bins is greater than Length
+  //
+  Size = 0;
+  for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
+    //
+    // Make sure the memory type in the gMemoryTypeInformation[] array is valid
+    //
+    Type = (EFI_MEMORY_TYPE)(gMemoryTypeInformation[Index].Type);
+    if ((UINT32)Type > EfiMaxMemoryType) {
+      continue;
+    }
+
+    Size += EFI_PAGES_TO_SIZE (gMemoryTypeInformation[Index].NumberOfPages);
+  }
+
+  if (Size > Length) {
+    return;
+  }
+
+  //
+  // Loop through each memory type in the order specified by the
+  // gMemoryTypeInformation[] array
+  //
+  Top = Start + Length;
+  for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
+    //
+    // Make sure the memory type in the gMemoryTypeInformation[] array is valid
+    //
+    Type = (EFI_MEMORY_TYPE)(gMemoryTypeInformation[Index].Type);
+    if ((UINT32)Type > EfiMaxMemoryType) {
+      continue;
+    }
+
+    if (gMemoryTypeInformation[Index].NumberOfPages != 0) {
+      mMemoryTypeStatistics[Type].MaximumAddress = Top - 1;
+      Top                                       -= EFI_PAGES_TO_SIZE (gMemoryTypeInformation[Index].NumberOfPages);
+      mMemoryTypeStatistics[Type].BaseAddress    = Top;
+
+      //
+      // If the current base address is the lowest address so far, then update
+      // the default maximum address
+      //
+      if (mMemoryTypeStatistics[Type].BaseAddress < mDefaultMaximumAddress) {
+        mDefaultMaximumAddress = mMemoryTypeStatistics[Type].BaseAddress - 1;
+      }
+
+      mMemoryTypeStatistics[Type].NumberOfPages   = gMemoryTypeInformation[Index].NumberOfPages;
+      gMemoryTypeInformation[Index].NumberOfPages = 0;
+    }
+  }
+
+  //
+  // If the number of pages reserved for a memory type is 0, then all
+  // allocations for that type should be in the default range.
+  //
+  for (Type = (EFI_MEMORY_TYPE)0; Type < EfiMaxMemoryType; Type++) {
+    for (Index = 0; gMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
+      if (Type == (EFI_MEMORY_TYPE)gMemoryTypeInformation[Index].Type) {
+        mMemoryTypeStatistics[Type].InformationIndex = Index;
+      }
+    }
+
+    mMemoryTypeStatistics[Type].CurrentNumberOfPages = 0;
+    if (mMemoryTypeStatistics[Type].MaximumAddress == MAX_ALLOC_ADDRESS) {
+      mMemoryTypeStatistics[Type].MaximumAddress = mDefaultMaximumAddress;
+    }
+  }
+
+  mMemoryTypeInformationInitialized = TRUE;
+}
+
 /**
   Called to initialize the memory map and add descriptors to
   the current descriptor list.
diff --git a/MdeModulePkg/Include/Guid/MemoryTypeInformation.h b/MdeModulePkg/Include/Guid/MemoryTypeInformation.h
index e97d88765ece..65adcf478b80 100644
--- a/MdeModulePkg/Include/Guid/MemoryTypeInformation.h
+++ b/MdeModulePkg/Include/Guid/MemoryTypeInformation.h
@@ -1,14 +1,18 @@
 /** @file
   This file defines:
-  * Memory Type Information GUID for HOB and Variable.
+  * Memory Type Information GUID for Guided HOB and Variable.
   * Memory Type Information Variable Name.
   * Memory Type Information GUID HOB data structure.
 
-  The memory type information HOB and variable can
-  be used to store the information for each memory type in Variable or HOB.
+  The memory type information HOB and variable can be used to store information
+  for each memory type in Variable or HOB.
 
-Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
-SPDX-License-Identifier: BSD-2-Clause-Patent
+  The Memory Type Information GUID can also be optionally used as the Owner
+  field of a Resource Descriptor HOB to provide the preferred memory range
+  for the memory types described in the Memory Type Information GUID HOB.
+
+  Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
 
 **/
 
-- 
2.40.1.windows.1



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