Re: [PATCH v3] MdeModulePkg: Enable/Disable S3BootScript dynamically.

["Laszlo Ersek" <lersek@redhat.com>]

On 09/27/19 09:51, Chasel Chiu wrote:
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2212
> 
> In binary model the same binary may have to support both
> S3 enabled and disabled scenarios, however not all DXE
> drivers linking PiDxeS3BootScriptLib can return error to
> invoke library DESTRUCTOR for releasing resource.
> 
> To support this usage model below PCD is used to skip
> S3BootScript functions when PCD set to FALSE:
>   gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiS3Enable
> 
> Test: Verified on internal platform and S3BootScript
>       functions can be skipped by PCD during boot time.
> 
> Cc: Hao A Wu <hao.a.wu@intel.com>
> Cc: Eric Dong <eric.dong@intel.com>
> Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Laszlo Ersek <lersek@redhat.com>
> Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
> ---
>  MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c       | 17 ++++++++++++++++-
>  MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf |  4 ++--
>  2 files changed, 18 insertions(+), 3 deletions(-)
> 
> diff --git a/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c b/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
> index c116727531..9106e7d0f9 100644
> --- a/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
> +++ b/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
> @@ -1,7 +1,7 @@
>  /** @file
>    Save the S3 data to S3 boot script.
>  
> -  Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
> +  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
>  
>    SPDX-License-Identifier: BSD-2-Clause-Patent
>  
> @@ -124,6 +124,7 @@ VOID                             *mRegistrationSmmReadyToLock = NULL;
>  BOOLEAN                          mS3BootScriptTableAllocated = FALSE;
>  BOOLEAN                          mS3BootScriptTableSmmAllocated = FALSE;
>  EFI_SMM_SYSTEM_TABLE2            *mBootScriptSmst = NULL;
> +BOOLEAN                          mAcpiS3Enable = TRUE;
>  
>  /**
>    This is an internal function to add a terminate node the entry, recalculate the table
> @@ -436,6 +437,12 @@ S3BootScriptLibInitialize (
>    BOOLEAN                        InSmm;
>    EFI_PHYSICAL_ADDRESS           Buffer;
>  
> +  if (!PcdGetBool (PcdAcpiS3Enable)) {
> +    mAcpiS3Enable = FALSE;
> +    DEBUG ((DEBUG_INFO, "%a: Skip S3BootScript because ACPI S3 disabled.\n", gEfiCallerBaseName));
> +    return RETURN_SUCCESS;
> +  }
> +
>    S3TablePtr = (SCRIPT_TABLE_PRIVATE_DATA*)(UINTN)PcdGet64(PcdS3BootScriptTablePrivateDataPtr);
>    //
>    // The Boot script private data is not be initialized. create it
> @@ -562,6 +569,10 @@ S3BootScriptLibDeinitialize (
>  {
>    EFI_STATUS                Status;
>  
> +  if (!mAcpiS3Enable) {
> +    return RETURN_SUCCESS;
> +  }
> +
>    DEBUG ((EFI_D_INFO, "%a() in %a module\n", __FUNCTION__, gEfiCallerBaseName));
>  
>    if (mEventDxeSmmReadyToLock != NULL) {
> @@ -810,6 +821,10 @@ S3BootScriptGetEntryAddAddress (
>  {
>    UINT8*                         NewEntryPtr;
>  
> +  if (!mAcpiS3Enable) {
> +    return NULL;
> +  }
> +
>    if (mS3BootScriptTablePtr->SmmLocked) {
>      //
>      // We need check InSmm, because after SmmReadyToLock, only SMM driver is allowed to write boot script.
> diff --git a/MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf b/MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf
> index 517ea69568..2b894c99da 100644
> --- a/MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf
> +++ b/MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf
> @@ -1,7 +1,7 @@
>  ## @file
>  # DXE S3 boot script Library.
>  #
> -# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
> +# Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
>  #
>  # SPDX-License-Identifier: BSD-2-Clause-Patent
>  #
> @@ -65,4 +65,4 @@
>    ## SOMETIMES_PRODUCES
>    gEfiMdeModulePkgTokenSpaceGuid.PcdS3BootScriptTablePrivateSmmDataPtr
>    gEfiMdeModulePkgTokenSpaceGuid.PcdS3BootScriptRuntimeTableReservePageNumber   ## CONSUMES
> -
> +  gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiS3Enable                                ## CONSUMES
> 

Acked-by: Laszlo Ersek <lersek@redhat.com>

Thanks!
Laszlo