[edk2-devel] [PATCH 3/5] CpuException: Avoid allocating page but using global variables

[Dong, Eric]

Acked-by: Eric Dong <eric.dong at intel.com>

-----Original Message-----
From: Ni, Ray <ray.ni at intel.com> 
Sent: Friday, May 20, 2022 10:16 PM
To: devel at edk2.groups.io
Cc: Dong, Eric <eric.dong at intel.com>
Subject: [PATCH 3/5] CpuException: Avoid allocating page but using global variables

Signed-off-by: Ray Ni <ray.ni at intel.com>
Cc: Eric Dong <eric.dong at intel.com>
---
 .../CpuExceptionHandlerLib/DxeException.c     | 24 ++++---------------
 1 file changed, 5 insertions(+), 19 deletions(-)

diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c
index da5b96d6c6..f139131a7c 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c
@@ -14,8 +14,8 @@
 

 CONST UINTN  mDoFarReturnFlag = 0;

 

-RESERVED_VECTORS_DATA      mReservedVectorsData[CPU_EXCEPTION_NUM];

-EFI_CPU_INTERRUPT_HANDLER  mExternalInterruptHandlerTable[CPU_EXCEPTION_NUM];

+RESERVED_VECTORS_DATA      mReservedVectorsData[CPU_INTERRUPT_NUM];

+EFI_CPU_INTERRUPT_HANDLER  mExternalInterruptHandlerTable[CPU_INTERRUPT_NUM];

 EXCEPTION_HANDLER_DATA     mExceptionHandlerData = {

   0,   // To be fixed

   0,   // To be fixed

@@ -96,27 +96,15 @@ InitializeCpuInterruptHandlers (
   IA32_DESCRIPTOR                 IdtDescriptor;

   UINTN                           IdtEntryCount;

   EXCEPTION_HANDLER_TEMPLATE_MAP  TemplateMap;

-  RESERVED_VECTORS_DATA           *ReservedVectors;

-  EFI_CPU_INTERRUPT_HANDLER       *ExternalInterruptHandler;

-

-  Status = gBS->AllocatePool (

-                  EfiBootServicesCode,

-                  sizeof (RESERVED_VECTORS_DATA) * CPU_INTERRUPT_NUM,

-                  (VOID **)&ReservedVectors

-                  );

-  ASSERT (!EFI_ERROR (Status) && ReservedVectors != NULL);

-  SetMem ((VOID *)ReservedVectors, sizeof (RESERVED_VECTORS_DATA) * CPU_INTERRUPT_NUM, 0xff);

+

+  SetMem ((VOID *)mReservedVectorsData, sizeof (RESERVED_VECTORS_DATA) * CPU_INTERRUPT_NUM, 0xff);

   if (VectorInfo != NULL) {

-    Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectors, CPU_INTERRUPT_NUM);

+    Status = ReadAndVerifyVectorInfo (VectorInfo, mReservedVectorsData, CPU_INTERRUPT_NUM);

     if (EFI_ERROR (Status)) {

-      FreePool (ReservedVectors);

       return EFI_INVALID_PARAMETER;

     }

   }

 

-  ExternalInterruptHandler = AllocateZeroPool (sizeof (EFI_CPU_INTERRUPT_HANDLER) * CPU_INTERRUPT_NUM);

-  ASSERT (ExternalInterruptHandler != NULL);

-

   //

   // Read IDT descriptor and calculate IDT size

   //

@@ -137,8 +125,6 @@ InitializeCpuInterruptHandlers (
   ASSERT (TemplateMap.ExceptionStubHeaderSize <= HOOKAFTER_STUB_SIZE);

 

   mExceptionHandlerData.IdtEntryCount            = CPU_INTERRUPT_NUM;

-  mExceptionHandlerData.ReservedVectors          = ReservedVectors;

-  mExceptionHandlerData.ExternalInterruptHandler = ExternalInterruptHandler;

   InitializeSpinLock (&mExceptionHandlerData.DisplayMessageSpinLock);

 

   UpdateIdtTable (IdtTable, &TemplateMap, &mExceptionHandlerData);

-- 
2.35.1.windows.2



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