Jian,
I think we need discussion on where to put the common CPU_INTERRUPT_NUM
definition.
Do you agree that we can leave that to another patch?
________________________________________
From: Wang, Jian J <jian.j.w...@intel.com>
Sent: Monday, May 23, 2022 0:27
To: devel@edk2.groups.io; Ni, Ray
Cc: Dong, Eric
Subject: RE: [edk2-devel] [PATCH 4/5] CpuException: Remove
InitializeCpuInterruptHandlers
Hi Ray,
Both CpuDxe.c and CpuExceptionCommon.h have CPU_INTERRUPT_NUM defined.
I'd suggest to move it to a common place, such as BaseLib.h. I don't see any
issue
if they are defined to different value. It just gives me a feeling that it
might cause
potential problems sometimes in the future.
Regards,
Jian
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Ni, Ray
> Sent: Friday, May 20, 2022 10:16 PM
> To: devel@edk2.groups.io
> Cc: Dong, Eric <eric.d...@intel.com>
> Subject: [edk2-devel] [PATCH 4/5] CpuException: Remove
> InitializeCpuInterruptHandlers
>
> InitializeCpuExceptionHandlers() expects caller allocates IDT while
> InitializeCpuInterruptHandlers() allocates 256 IDT entries itself.
>
> InitializeCpuExceptionHandlers() fills max 32 IDT entries allocated
> by caller. If caller allocates 10 entries, the API just fills 10 IDT
> entries.
>
> The inconsistency between the two APIs makes code hard to
> unerstand and hard to share.
>
> Because there is only one caller (CpuDxe) for
> InitializeCpuInterruptHandler(), this patch updates CpuDxe driver
> to allocates 256 IDT entries then call
> InitializeCpuExceptionHandlers().
>
> With this change, InitializeCpuInterruptHandlers() is removed
> completely.
>
> And InitializeCpuExceptionHandlers() fills max 32 entries for PEI
> and SMM instance, max 256 entries for DXE instance.
> Such behavior matches to the original one.
>
> Signed-off-by: Ray Ni <ray...@intel.com>
> Cc: Eric Dong <eric.d...@intel.com>
> ---
> .../Include/Library/CpuExceptionHandlerLib.h | 28 +------
> .../CpuExceptionHandlerLibNull.c | 31 +------
> UefiCpuPkg/CpuDxe/CpuDxe.c | 33 ++++++--
> .../CpuExceptionHandlerLib/DxeException.c | 80 ++-----------------
> .../CpuExceptionHandlerLib/PeiCpuException.c | 61 +-------------
> .../PeiDxeSmmCpuException.c | 19 ++---
> .../SecPeiCpuException.c | 31 +------
> .../CpuExceptionHandlerLib/SmmException.c | 35 ++------
> 8 files changed, 56 insertions(+), 262 deletions(-)
>
> diff --git a/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
> b/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
> index 22a4408f9f..d4649bebe1 100644
> --- a/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
> +++ b/MdeModulePkg/Include/Library/CpuExceptionHandlerLib.h
> @@ -2,7 +2,7 @@
> CPU Exception library provides the default CPU interrupt/exception handler.
>
> It also provides capability to register user interrupt/exception handler.
>
>
>
> - Copyright (c) 2012 - 2018, Intel Corporation. All rights reserved.<BR>
>
> + Copyright (c) 2012 - 2022, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -132,28 +132,6 @@ InitializeCpuExceptionHandlersEx (
> IN CPU_EXCEPTION_INIT_DATA *InitData OPTIONAL
>
> );
>
>
>
> -/**
>
> - Initializes all CPU interrupt/exceptions entries and provides the default
> interrupt/exception handlers.
>
> -
>
> - Caller should try to get an array of interrupt and/or exception vectors
> that are
> in use and need to
>
> - persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
>
> - If caller cannot get reserved vector list or it does not exists, set
> VectorInfo to
> NULL.
>
> - If VectorInfo is not NULL, the exception vectors will be initialized per
> vector
> attribute accordingly.
>
> -
>
> - @param[in] VectorInfo Pointer to reserved vector list.
>
> -
>
> - @retval EFI_SUCCESS All CPU interrupt/exception entries have been
> successfully initialized
>
> - with default interrupt/exception handlers.
>
> - @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if
> VectorInfo is not NULL.
>
> - @retval EFI_UNSUPPORTED This function is not supported.
>
> -
>
> -**/
>
> -EFI_STATUS
>
> -EFIAPI
>
> -InitializeCpuInterruptHandlers (
>
> - IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
>
> - );
>
> -
>
> /**
>
> Registers a function to be called from the processor interrupt handler.
>
>
>
> @@ -161,8 +139,8 @@ InitializeCpuInterruptHandlers (
> interrupt or exception type specified by InterruptType. If
> InterruptHandler is
> NULL, then the
>
> handler for the processor interrupt or exception type specified by
> InterruptType is uninstalled.
>
> The installed handler is called once for each processor interrupt or
> exception.
>
> - NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> or
>
> - InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED
> returned.
>
> + NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> is invoked,
>
> + otherwise EFI_UNSUPPORTED returned.
>
>
>
> @param[in] InterruptType Defines which interrupt or exception to hook.
>
> @param[in] InterruptHandler A pointer to a function of type
> EFI_CPU_INTERRUPT_HANDLER that is called
>
> diff --git
> a/MdeModulePkg/Library/CpuExceptionHandlerLibNull/CpuExceptionHandlerLib
> Null.c
> b/MdeModulePkg/Library/CpuExceptionHandlerLibNull/CpuExceptionHandlerLib
> Null.c
> index 35ab5a8db5..54f38788fe 100644
> ---
> a/MdeModulePkg/Library/CpuExceptionHandlerLibNull/CpuExceptionHandlerLib
> Null.c
> +++
> b/MdeModulePkg/Library/CpuExceptionHandlerLibNull/CpuExceptionHandlerLib
> Null.c
> @@ -1,7 +1,7 @@
> /** @file
>
> CPU Exception Handler library implementition with empty functions.
>
>
>
> - Copyright (c) 2012 - 2018, Intel Corporation. All rights reserved.<BR>
>
> + Copyright (c) 2012 - 2022, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -33,31 +33,6 @@ InitializeCpuExceptionHandlers (
> return EFI_SUCCESS;
>
> }
>
>
>
> -/**
>
> - Initializes all CPU interrupt/exceptions entries and provides the default
> interrupt/exception handlers.
>
> -
>
> - Caller should try to get an array of interrupt and/or exception vectors
> that are
> in use and need to
>
> - persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
>
> - If caller cannot get reserved vector list or it does not exists, set
> VectorInfo to
> NULL.
>
> - If VectorInfo is not NULL, the exception vectors will be initialized per
> vector
> attribute accordingly.
>
> -
>
> - @param[in] VectorInfo Pointer to reserved vector list.
>
> -
>
> - @retval EFI_SUCCESS All CPU interrupt/exception entries have been
> successfully initialized
>
> - with default interrupt/exception handlers.
>
> - @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if
> VectorInfo is not NULL.
>
> - @retval EFI_UNSUPPORTED This function is not supported.
>
> -
>
> -**/
>
> -EFI_STATUS
>
> -EFIAPI
>
> -InitializeCpuInterruptHandlers (
>
> - IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
>
> - )
>
> -{
>
> - return EFI_SUCCESS;
>
> -}
>
> -
>
> /**
>
> Registers a function to be called from the processor interrupt handler.
>
>
>
> @@ -65,8 +40,8 @@ InitializeCpuInterruptHandlers (
> interrupt or exception type specified by InterruptType. If
> InterruptHandler is
> NULL, then the
>
> handler for the processor interrupt or exception type specified by
> InterruptType is uninstalled.
>
> The installed handler is called once for each processor interrupt or
> exception.
>
> - NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> or
>
> - InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED
> returned.
>
> + NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> is invoked,
>
> + otherwise EFI_UNSUPPORTED returned.
>
>
>
> @param[in] InterruptType Defines which interrupt or exception to hook.
>
> @param[in] InterruptHandler A pointer to a function of type
> EFI_CPU_INTERRUPT_HANDLER that is called
>
> diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c
> index 00f3cb0957..a6a91507f6 100644
> --- a/UefiCpuPkg/CpuDxe/CpuDxe.c
> +++ b/UefiCpuPkg/CpuDxe/CpuDxe.c
> @@ -1,7 +1,7 @@
> /** @file
>
> CPU DXE Module to produce CPU ARCH Protocol.
>
>
>
> - Copyright (c) 2008 - 2018, Intel Corporation. All rights reserved.<BR>
>
> + Copyright (c) 2008 - 2022, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -10,6 +10,8 @@
> #include "CpuMp.h"
>
> #include "CpuPageTable.h"
>
>
>
> +#define CPU_INTERRUPT_NUM 256
>
> +
>
> //
>
> // Global Variables
>
> //
>
> @@ -924,9 +926,12 @@ InitInterruptDescriptorTable (
> VOID
>
> )
>
> {
>
> - EFI_STATUS Status;
>
> - EFI_VECTOR_HANDOFF_INFO *VectorInfoList;
>
> - EFI_VECTOR_HANDOFF_INFO *VectorInfo;
>
> + EFI_STATUS Status;
>
> + EFI_VECTOR_HANDOFF_INFO *VectorInfoList;
>
> + EFI_VECTOR_HANDOFF_INFO *VectorInfo;
>
> + IA32_IDT_GATE_DESCRIPTOR *IdtTable;
>
> + IA32_DESCRIPTOR IdtDescriptor;
>
> + UINTN IdtEntryCount;
>
>
>
> VectorInfo = NULL;
>
> Status = EfiGetSystemConfigurationTable (&gEfiVectorHandoffTableGuid,
> (VOID **)&VectorInfoList);
>
> @@ -934,7 +939,25 @@ InitInterruptDescriptorTable (
> VectorInfo = VectorInfoList;
>
> }
>
>
>
> - Status = InitializeCpuInterruptHandlers (VectorInfo);
>
> + AsmReadIdtr (&IdtDescriptor);
>
> + IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof
> (IA32_IDT_GATE_DESCRIPTOR);
>
> + if (IdtEntryCount < CPU_INTERRUPT_NUM) {
>
> + //
>
> + // Increase Interrupt Descriptor Table and Copy the old IDT table in
>
> + //
>
> + IdtTable = AllocateZeroPool (sizeof (IA32_IDT_GATE_DESCRIPTOR) *
> CPU_INTERRUPT_NUM);
>
> + ASSERT (IdtTable != NULL);
>
> + CopyMem (IdtTable, (VOID *)IdtDescriptor.Base, sizeof
> (IA32_IDT_GATE_DESCRIPTOR) * IdtEntryCount);
>
> +
>
> + //
>
> + // Load Interrupt Descriptor Table
>
> + //
>
> + IdtDescriptor.Base = (UINTN)IdtTable;
>
> + IdtDescriptor.Limit = (UINT16)(sizeof (IA32_IDT_GATE_DESCRIPTOR) *
> CPU_INTERRUPT_NUM - 1);
>
> + AsmWriteIdtr (&IdtDescriptor);
>
> + }
>
> +
>
> + Status = InitializeCpuExceptionHandlers (VectorInfo);
>
> ASSERT_EFI_ERROR (Status);
>
> }
>
>
>
> diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c
> b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c
> index f139131a7c..c7c1fe31d2 100644
> --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c
> +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeException.c
> @@ -1,7 +1,7 @@
> /** @file
>
> CPU exception handler library implemenation for DXE modules.
>
>
>
> - Copyright (c) 2013 - 2017, Intel Corporation. All rights reserved.<BR>
>
> + Copyright (c) 2013 - 2022, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -17,8 +17,8 @@ CONST UINTN mDoFarReturnFlag = 0;
> 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
>
> + CPU_INTERRUPT_NUM,
>
> + 0, // To be fixed
>
> mReservedVectorsData,
>
> mExternalInterruptHandlerTable
>
> };
>
> @@ -69,76 +69,6 @@ InitializeCpuExceptionHandlers (
> return InitializeCpuExceptionHandlersWorker (VectorInfo,
> &mExceptionHandlerData);
>
> }
>
>
>
> -/**
>
> - Initializes all CPU interrupt/exceptions entries and provides the default
> interrupt/exception handlers.
>
> -
>
> - Caller should try to get an array of interrupt and/or exception vectors
> that are
> in use and need to
>
> - persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
>
> - If caller cannot get reserved vector list or it does not exists, set
> VectorInfo to
> NULL.
>
> - If VectorInfo is not NULL, the exception vectors will be initialized per
> vector
> attribute accordingly.
>
> -
>
> - @param[in] VectorInfo Pointer to reserved vector list.
>
> -
>
> - @retval EFI_SUCCESS All CPU interrupt/exception entries have been
> successfully initialized
>
> - with default interrupt/exception handlers.
>
> - @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if
> VectorInfo is not NULL.
>
> - @retval EFI_UNSUPPORTED This function is not supported.
>
> -
>
> -**/
>
> -EFI_STATUS
>
> -EFIAPI
>
> -InitializeCpuInterruptHandlers (
>
> - IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
>
> - )
>
> -{
>
> - EFI_STATUS Status;
>
> - IA32_IDT_GATE_DESCRIPTOR *IdtTable;
>
> - IA32_DESCRIPTOR IdtDescriptor;
>
> - UINTN IdtEntryCount;
>
> - EXCEPTION_HANDLER_TEMPLATE_MAP TemplateMap;
>
> -
>
> - SetMem ((VOID *)mReservedVectorsData, sizeof (RESERVED_VECTORS_DATA)
> * CPU_INTERRUPT_NUM, 0xff);
>
> - if (VectorInfo != NULL) {
>
> - Status = ReadAndVerifyVectorInfo (VectorInfo, mReservedVectorsData,
> CPU_INTERRUPT_NUM);
>
> - if (EFI_ERROR (Status)) {
>
> - return EFI_INVALID_PARAMETER;
>
> - }
>
> - }
>
> -
>
> - //
>
> - // Read IDT descriptor and calculate IDT size
>
> - //
>
> - AsmReadIdtr (&IdtDescriptor);
>
> - IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof
> (IA32_IDT_GATE_DESCRIPTOR);
>
> - if (IdtEntryCount > CPU_INTERRUPT_NUM) {
>
> - IdtEntryCount = CPU_INTERRUPT_NUM;
>
> - }
>
> -
>
> - //
>
> - // Create Interrupt Descriptor Table and Copy the old IDT table in
>
> - //
>
> - IdtTable = AllocateZeroPool (sizeof (IA32_IDT_GATE_DESCRIPTOR) *
> CPU_INTERRUPT_NUM);
>
> - ASSERT (IdtTable != NULL);
>
> - CopyMem (IdtTable, (VOID *)IdtDescriptor.Base, sizeof
> (IA32_IDT_GATE_DESCRIPTOR) * IdtEntryCount);
>
> -
>
> - AsmGetTemplateAddressMap (&TemplateMap);
>
> - ASSERT (TemplateMap.ExceptionStubHeaderSize <= HOOKAFTER_STUB_SIZE);
>
> -
>
> - mExceptionHandlerData.IdtEntryCount = CPU_INTERRUPT_NUM;
>
> - InitializeSpinLock (&mExceptionHandlerData.DisplayMessageSpinLock);
>
> -
>
> - UpdateIdtTable (IdtTable, &TemplateMap, &mExceptionHandlerData);
>
> -
>
> - //
>
> - // Load Interrupt Descriptor Table
>
> - //
>
> - IdtDescriptor.Base = (UINTN)IdtTable;
>
> - IdtDescriptor.Limit = (UINT16)(sizeof (IA32_IDT_GATE_DESCRIPTOR) *
> CPU_INTERRUPT_NUM - 1);
>
> - AsmWriteIdtr ((IA32_DESCRIPTOR *)&IdtDescriptor);
>
> -
>
> - return EFI_SUCCESS;
>
> -}
>
> -
>
> /**
>
> Registers a function to be called from the processor interrupt handler.
>
>
>
> @@ -146,8 +76,8 @@ InitializeCpuInterruptHandlers (
> interrupt or exception type specified by InterruptType. If
> InterruptHandler is
> NULL, then the
>
> handler for the processor interrupt or exception type specified by
> InterruptType is uninstalled.
>
> The installed handler is called once for each processor interrupt or
> exception.
>
> - NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> or
>
> - InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED
> returned.
>
> + NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> is invoked,
>
> + otherwise EFI_UNSUPPORTED returned.
>
>
>
> @param[in] InterruptType Defines which interrupt or exception to hook.
>
> @param[in] InterruptHandler A pointer to a function of type
> EFI_CPU_INTERRUPT_HANDLER that is called
>
> diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuException.c
> b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuException.c
> index 687fc4177f..1ae611c75e 100644
> --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuException.c
> +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiCpuException.c
> @@ -1,7 +1,7 @@
> /** @file
>
> CPU exception handler library implementation for PEIM module.
>
>
>
> -Copyright (c) 2016 - 2018, Intel Corporation. All rights reserved.<BR>
>
> +Copyright (c) 2016 - 2022, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -133,6 +133,7 @@ InitializeCpuExceptionHandlers (
>
>
> ExceptionHandlerData = AllocatePool (sizeof (EXCEPTION_HANDLER_DATA));
>
> ASSERT (ExceptionHandlerData != NULL);
>
> + ExceptionHandlerData->IdtEntryCount = CPU_EXCEPTION_NUM;
>
> ExceptionHandlerData->ReservedVectors = ReservedVectors;
>
> ExceptionHandlerData->ExternalInterruptHandler = NULL;
>
> InitializeSpinLock (&ExceptionHandlerData->DisplayMessageSpinLock);
>
> @@ -148,64 +149,6 @@ InitializeCpuExceptionHandlers (
> return EFI_SUCCESS;
>
> }
>
>
>
> -/**
>
> - Initializes all CPU interrupt/exceptions entries and provides the default
> interrupt/exception handlers.
>
> -
>
> - Caller should try to get an array of interrupt and/or exception vectors
> that are
> in use and need to
>
> - persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
>
> - If caller cannot get reserved vector list or it does not exists, set
> VectorInfo to
> NULL.
>
> - If VectorInfo is not NULL, the exception vectors will be initialized per
> vector
> attribute accordingly.
>
> -
>
> - @param[in] VectorInfo Pointer to reserved vector list.
>
> -
>
> - @retval EFI_SUCCESS All CPU interrupt/exception entries have been
> successfully initialized
>
> - with default interrupt/exception handlers.
>
> - @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if
> VectorInfo is not NULL.
>
> - @retval EFI_UNSUPPORTED This function is not supported.
>
> -
>
> -**/
>
> -EFI_STATUS
>
> -EFIAPI
>
> -InitializeCpuInterruptHandlers (
>
> - IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
>
> - )
>
> -{
>
> - return EFI_UNSUPPORTED;
>
> -}
>
> -
>
> -/**
>
> - Registers a function to be called from the processor interrupt handler.
>
> -
>
> - This function registers and enables the handler specified by
> InterruptHandler
> for a processor
>
> - interrupt or exception type specified by InterruptType. If
> InterruptHandler is
> NULL, then the
>
> - handler for the processor interrupt or exception type specified by
> InterruptType is uninstalled.
>
> - The installed handler is called once for each processor interrupt or
> exception.
>
> - NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> or
>
> - InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED
> returned.
>
> -
>
> - @param[in] InterruptType Defines which interrupt or exception to hook.
>
> - @param[in] InterruptHandler A pointer to a function of type
> EFI_CPU_INTERRUPT_HANDLER that is called
>
> - when a processor interrupt occurs. If this
> parameter is NULL,
> then the handler
>
> - will be uninstalled.
>
> -
>
> - @retval EFI_SUCCESS The handler for the processor interrupt was
> successfully installed or uninstalled.
>
> - @retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler
> for InterruptType was
>
> - previously installed.
>
> - @retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for
> InterruptType was not
>
> - previously installed.
>
> - @retval EFI_UNSUPPORTED The interrupt specified by InterruptType is
> not
> supported,
>
> - or this function is not supported.
>
> -**/
>
> -EFI_STATUS
>
> -EFIAPI
>
> -RegisterCpuInterruptHandler (
>
> - IN EFI_EXCEPTION_TYPE InterruptType,
>
> - IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
>
> - )
>
> -{
>
> - return EFI_UNSUPPORTED;
>
> -}
>
> -
>
> /**
>
> Initializes all CPU exceptions entries with optional extra initializations.
>
>
>
> diff --git
> a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c
> b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c
> index f47a80dcab..a7d0897ef1 100644
> --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c
> +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/PeiDxeSmmCpuException.c
> @@ -1,7 +1,7 @@
> /** @file
>
> CPU Exception Library provides PEI/DXE/SMM CPU common exception handler.
>
>
>
> -Copyright (c) 2012 - 2018, Intel Corporation. All rights reserved.<BR>
>
> +Copyright (c) 2012 - 2022, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -261,31 +261,26 @@ InitializeCpuExceptionHandlersWorker (
> RESERVED_VECTORS_DATA *ReservedVectors;
>
>
>
> ReservedVectors = ExceptionHandlerData->ReservedVectors;
>
> - SetMem ((VOID *)ReservedVectors, sizeof (RESERVED_VECTORS_DATA) *
> CPU_EXCEPTION_NUM, 0xff);
>
> + SetMem ((VOID *)ReservedVectors, sizeof (RESERVED_VECTORS_DATA) *
> ExceptionHandlerData->IdtEntryCount, 0xff);
>
> if (VectorInfo != NULL) {
>
> - Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectors,
> CPU_EXCEPTION_NUM);
>
> + Status = ReadAndVerifyVectorInfo (VectorInfo, ReservedVectors,
> ExceptionHandlerData->IdtEntryCount);
>
> if (EFI_ERROR (Status)) {
>
> return EFI_INVALID_PARAMETER;
>
> }
>
> }
>
>
>
> //
>
> - // Read IDT descriptor and calculate IDT size
>
> + // Setup the exception handlers according to IDT size, but no more than
>
> + // ExceptionHandlerData->IdtEntryCount (32 in PEI and SMM, 256 in DXE)
> handlers.
>
> //
>
> AsmReadIdtr (&IdtDescriptor);
>
> - IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof
> (IA32_IDT_GATE_DESCRIPTOR);
>
> - if (IdtEntryCount > CPU_EXCEPTION_NUM) {
>
> - //
>
> - // CPU exception library only setup CPU_EXCEPTION_NUM exception handler
> at most
>
> - //
>
> - IdtEntryCount = CPU_EXCEPTION_NUM;
>
> - }
>
> + IdtEntryCount = (IdtDescriptor.Limit + 1) / sizeof
> (IA32_IDT_GATE_DESCRIPTOR);
>
> + ExceptionHandlerData->IdtEntryCount = MIN (IdtEntryCount,
> ExceptionHandlerData->IdtEntryCount);
>
>
>
> IdtTable = (IA32_IDT_GATE_DESCRIPTOR *)IdtDescriptor.Base;
>
> AsmGetTemplateAddressMap (&TemplateMap);
>
> ASSERT (TemplateMap.ExceptionStubHeaderSize <= HOOKAFTER_STUB_SIZE);
>
>
>
> - ExceptionHandlerData->IdtEntryCount = IdtEntryCount;
>
> UpdateIdtTable (IdtTable, &TemplateMap, ExceptionHandlerData);
>
>
>
> return EFI_SUCCESS;
>
> diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c
> b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c
> index 6e5216380d..e894ead612 100644
> --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c
> +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SecPeiCpuException.c
> @@ -1,7 +1,7 @@
> /** @file
>
> CPU exception handler library implemenation for SEC/PEIM modules.
>
>
>
> -Copyright (c) 2012 - 2018, Intel Corporation. All rights reserved.<BR>
>
> +Copyright (c) 2012 - 2022, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -166,31 +166,6 @@ InitializeCpuExceptionHandlers (
> return EFI_SUCCESS;
>
> }
>
>
>
> -/**
>
> - Initializes all CPU interrupt/exceptions entries and provides the default
> interrupt/exception handlers.
>
> -
>
> - Caller should try to get an array of interrupt and/or exception vectors
> that are
> in use and need to
>
> - persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
>
> - If caller cannot get reserved vector list or it does not exists, set
> VectorInfo to
> NULL.
>
> - If VectorInfo is not NULL, the exception vectors will be initialized per
> vector
> attribute accordingly.
>
> -
>
> - @param[in] VectorInfo Pointer to reserved vector list.
>
> -
>
> - @retval EFI_SUCCESS All CPU interrupt/exception entries have been
> successfully initialized
>
> - with default interrupt/exception handlers.
>
> - @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if
> VectorInfo is not NULL.
>
> - @retval EFI_UNSUPPORTED This function is not supported.
>
> -
>
> -**/
>
> -EFI_STATUS
>
> -EFIAPI
>
> -InitializeCpuInterruptHandlers (
>
> - IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
>
> - )
>
> -{
>
> - return EFI_UNSUPPORTED;
>
> -}
>
> -
>
> /**
>
> Registers a function to be called from the processor interrupt handler.
>
>
>
> @@ -198,8 +173,8 @@ InitializeCpuInterruptHandlers (
> interrupt or exception type specified by InterruptType. If
> InterruptHandler is
> NULL, then the
>
> handler for the processor interrupt or exception type specified by
> InterruptType is uninstalled.
>
> The installed handler is called once for each processor interrupt or
> exception.
>
> - NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> or
>
> - InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED
> returned.
>
> + NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> is invoked,
>
> + otherwise EFI_UNSUPPORTED returned.
>
>
>
> @param[in] InterruptType Defines which interrupt or exception to hook.
>
> @param[in] InterruptHandler A pointer to a function of type
> EFI_CPU_INTERRUPT_HANDLER that is called
>
> diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmException.c
> b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmException.c
> index 9f0af4120a..ec643556c7 100644
> --- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmException.c
> +++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/SmmException.c
> @@ -1,7 +1,7 @@
> /** @file
>
> CPU exception handler library implementation for SMM modules.
>
>
>
> - Copyright (c) 2013 - 2017, Intel Corporation. All rights reserved.<BR>
>
> + Copyright (c) 2013 - 2022, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -14,8 +14,8 @@ CONST UINTN mDoFarReturnFlag = 1;
> RESERVED_VECTORS_DATA mReservedVectorsData[CPU_EXCEPTION_NUM];
>
> EFI_CPU_INTERRUPT_HANDLER
> mExternalInterruptHandlerTable[CPU_EXCEPTION_NUM];
>
> EXCEPTION_HANDLER_DATA mExceptionHandlerData = {
>
> - 0, // To be fixed
>
> - 0, // To be fixed
>
> + CPU_EXCEPTION_NUM,
>
> + 0, // To be fixed
>
> mReservedVectorsData,
>
> mExternalInterruptHandlerTable
>
> };
>
> @@ -62,31 +62,6 @@ InitializeCpuExceptionHandlers (
> return InitializeCpuExceptionHandlersWorker (VectorInfo,
> &mExceptionHandlerData);
>
> }
>
>
>
> -/**
>
> - Initializes all CPU interrupt/exceptions entries and provides the default
> interrupt/exception handlers.
>
> -
>
> - Caller should try to get an array of interrupt and/or exception vectors
> that are
> in use and need to
>
> - persist by EFI_VECTOR_HANDOFF_INFO defined in PI 1.3 specification.
>
> - If caller cannot get reserved vector list or it does not exists, set
> VectorInfo to
> NULL.
>
> - If VectorInfo is not NULL, the exception vectors will be initialized per
> vector
> attribute accordingly.
>
> -
>
> - @param[in] VectorInfo Pointer to reserved vector list.
>
> -
>
> - @retval EFI_SUCCESS All CPU interrupt/exception entries have been
> successfully initialized
>
> - with default interrupt/exception handlers.
>
> - @retval EFI_INVALID_PARAMETER VectorInfo includes the invalid content if
> VectorInfo is not NULL.
>
> - @retval EFI_UNSUPPORTED This function is not supported.
>
> -
>
> -**/
>
> -EFI_STATUS
>
> -EFIAPI
>
> -InitializeCpuInterruptHandlers (
>
> - IN EFI_VECTOR_HANDOFF_INFO *VectorInfo OPTIONAL
>
> - )
>
> -{
>
> - return EFI_UNSUPPORTED;
>
> -}
>
> -
>
> /**
>
> Registers a function to be called from the processor interrupt handler.
>
>
>
> @@ -94,8 +69,8 @@ InitializeCpuInterruptHandlers (
> interrupt or exception type specified by InterruptType. If
> InterruptHandler is
> NULL, then the
>
> handler for the processor interrupt or exception type specified by
> InterruptType is uninstalled.
>
> The installed handler is called once for each processor interrupt or
> exception.
>
> - NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> or
>
> - InitializeCpuInterruptHandlers() invoked, otherwise EFI_UNSUPPORTED
> returned.
>
> + NOTE: This function should be invoked after
> InitializeCpuExceptionHandlers()
> is invoked,
>
> + otherwise EFI_UNSUPPORTED returned.
>
>
>
> @param[in] InterruptType Defines which interrupt or exception to hook.
>
> @param[in] InterruptHandler A pointer to a function of type
> EFI_CPU_INTERRUPT_HANDLER that is called
>
> --
> 2.35.1.windows.2
>
>
>
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