[v1] Add Variable Flash Info HOB

[edk2-devel] [PATCH v1 0/3] Add Variable Flash Info HOB

Posted by Michael Kubacki 2 years ago

From: Michael Kubacki <michael.kubacki@microsoft.com>

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3479

The UEFI variable drivers such as VariableRuntimeDxe, VariableSmm,
VariableStandaloneMm, etc. (and their dependent protocol/library
stack), typically acquire UEFI variable store flash information
with PCDs declared in MdeModulePkg.

For example:
[Pcd]
  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize

These PCDs work as-is in the StandaloneMm driver if they are not
dynamic such as Dynamic or DynamicEx because PCD services are not
readily available in the Standalone MM environment. Platforms that
use Standalone MM today, must define these PCDs as FixedAtBuild in
their platform build. However, the PCDs do allow platforms to treat
the PCDs as Dynamic/DynamicEx and being able to support that is
currently a gap for Standalone MM.

This patch series introduces a HOB that can be produced by the
platform to provide the same information. The HOB list is
available to Standalone MM.

The PCD declarations are left as-is in MdeModulePkg for backward
compatibility. This means unless a platform wants to use the HOB,
their code will continue to work with no change (they do not need
to produce the HOB). Only if the HOB is found, is its value used
instead of the PCDs.

Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com

Michael Kubacki (3):
  MdeModulePkg: Add Variable Flash Info HOB
  MdeModulePkg/Variable: Consume Variable Info HOB
  MdeModulePkg/FaultTolerantWrite: Consume Variable Info HOB

 MdeModulePkg/Universal/FaultTolerantWriteDxe/FtwMisc.c                          | 111 +++++++++++++++++---
 MdeModulePkg/Universal/FaultTolerantWriteDxe/UpdateWorkingBlock.c               |   7 +-
 MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.c            |  92 ++++++++++++++--
 MdeModulePkg/Universal/Variable/Pei/Variable.c                                  |  66 +++++++++++-
 MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c                           |  42 ++++++++
 MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c                        |  25 ++++-
 MdeModulePkg/Universal/Variable/RuntimeDxe/VariableNonVolatile.c                |  20 +++-
 MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c                        |  20 +++-
 MdeModulePkg/Include/Guid/VariableFlashInfo.h                                   |  36 +++++++
 MdeModulePkg/MdeModulePkg.dec                                                   |   4 +
 MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.h               |   9 +-
 MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf          |  11 +-
 MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf          |  11 +-
 MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.inf |  11 +-
 MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf          |  10 +-
 MdeModulePkg/Universal/Variable/Pei/Variable.h                                  |   2 +
 MdeModulePkg/Universal/Variable/Pei/VariablePei.inf                             |   6 +-
 MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h                           |  17 +++
 MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf               |   6 +-
 MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf                      |   6 +-
 MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf             |   6 +-
 21 files changed, 455 insertions(+), 63 deletions(-)
 create mode 100644 MdeModulePkg/Include/Guid/VariableFlashInfo.h

-- 
2.28.0.windows.1



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Re: [edk2-devel] [PATCH v1 0/3] Add Variable Flash Info HOB

Posted by Wu, Hao A 2 years ago

Sorry for a question:
GetVariableFlashInfo() seems being defined multiple times across modules, do you see value in abstracting it as a library API?

Best Regards,
Hao Wu

> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Michael
> Kubacki
> Sent: Thursday, April 7, 2022 12:27 AM
> To: devel@edk2.groups.io
> Cc: Wang, Jian J <jian.j.wang@intel.com>; Wu, Hao A <hao.a.wu@intel.com>;
> Gao, Liming <gaoliming@byosoft.com.cn>
> Subject: [edk2-devel] [PATCH v1 0/3] Add Variable Flash Info HOB
> 
> From: Michael Kubacki <michael.kubacki@microsoft.com>
> 
> REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3479
> 
> The UEFI variable drivers such as VariableRuntimeDxe, VariableSmm,
> VariableStandaloneMm, etc. (and their dependent protocol/library
> stack), typically acquire UEFI variable store flash information
> with PCDs declared in MdeModulePkg.
> 
> For example:
> [Pcd]
>   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
>   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
>   gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
> 
> These PCDs work as-is in the StandaloneMm driver if they are not
> dynamic such as Dynamic or DynamicEx because PCD services are not
> readily available in the Standalone MM environment. Platforms that
> use Standalone MM today, must define these PCDs as FixedAtBuild in
> their platform build. However, the PCDs do allow platforms to treat
> the PCDs as Dynamic/DynamicEx and being able to support that is
> currently a gap for Standalone MM.
> 
> This patch series introduces a HOB that can be produced by the
> platform to provide the same information. The HOB list is
> available to Standalone MM.
> 
> The PCD declarations are left as-is in MdeModulePkg for backward
> compatibility. This means unless a platform wants to use the HOB,
> their code will continue to work with no change (they do not need
> to produce the HOB). Only if the HOB is found, is its value used
> instead of the PCDs.
> 
> Cc: Jian J Wang <jian.j.wang@intel.com>
> Cc: Hao A Wu <hao.a.wu@intel.com>
> Cc: Liming Gao <gaoliming@byosoft.com.cn>
> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com
> 
> Michael Kubacki (3):
>   MdeModulePkg: Add Variable Flash Info HOB
>   MdeModulePkg/Variable: Consume Variable Info HOB
>   MdeModulePkg/FaultTolerantWrite: Consume Variable Info HOB
> 
>  MdeModulePkg/Universal/FaultTolerantWriteDxe/FtwMisc.c                          |
> 111 +++++++++++++++++---
>  MdeModulePkg/Universal/FaultTolerantWriteDxe/UpdateWorkingBlock.c
> |   7 +-
>  MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.c
> |  92 ++++++++++++++--
>  MdeModulePkg/Universal/Variable/Pei/Variable.c                                  |  66
> +++++++++++-
>  MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c                           |  42
> ++++++++
>  MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c                        |
> 25 ++++-
>  MdeModulePkg/Universal/Variable/RuntimeDxe/VariableNonVolatile.c
> |  20 +++-
>  MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c                        |
> 20 +++-
>  MdeModulePkg/Include/Guid/VariableFlashInfo.h                                   |  36
> +++++++
>  MdeModulePkg/MdeModulePkg.dec                                                   |   4 +
>  MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.h
> |   9 +-
>  MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
> |  11 +-
>  MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf
> |  11 +-
> 
> MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandalon
> eMm.inf |  11 +-
>  MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf
> |  10 +-
>  MdeModulePkg/Universal/Variable/Pei/Variable.h                                  |   2 +
>  MdeModulePkg/Universal/Variable/Pei/VariablePei.inf                             |   6 +-
>  MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h                           |  17
> +++
>  MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
> |   6 +-
>  MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf                      |
> 6 +-
>  MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf
> |   6 +-
>  21 files changed, 455 insertions(+), 63 deletions(-)
>  create mode 100644 MdeModulePkg/Include/Guid/VariableFlashInfo.h
> 
> --
> 2.28.0.windows.1
> 
> 
> 
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Re: [edk2-devel] [PATCH v1 0/3] Add Variable Flash Info HOB

Posted by Michael Kubacki 2 years ago

Yes, I considered that as well but I was not sure if it was worth adding 
a new library just for that. I agree though that the code should not be 
duplicated. I will look into it and include your other suggestions in a 
v2 series.

Thanks,
Michael

On 4/6/2022 11:31 PM, Wu, Hao A wrote:
> Sorry for a question:
> GetVariableFlashInfo() seems being defined multiple times across modules, do you see value in abstracting it as a library API?
> 
> Best Regards,
> Hao Wu
> 
>> -----Original Message-----
>> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Michael
>> Kubacki
>> Sent: Thursday, April 7, 2022 12:27 AM
>> To: devel@edk2.groups.io
>> Cc: Wang, Jian J <jian.j.wang@intel.com>; Wu, Hao A <hao.a.wu@intel.com>;
>> Gao, Liming <gaoliming@byosoft.com.cn>
>> Subject: [edk2-devel] [PATCH v1 0/3] Add Variable Flash Info HOB
>>
>> From: Michael Kubacki <michael.kubacki@microsoft.com>
>>
>> REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3479
>>
>> The UEFI variable drivers such as VariableRuntimeDxe, VariableSmm,
>> VariableStandaloneMm, etc. (and their dependent protocol/library
>> stack), typically acquire UEFI variable store flash information
>> with PCDs declared in MdeModulePkg.
>>
>> For example:
>> [Pcd]
>>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
>>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
>>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
>>
>> These PCDs work as-is in the StandaloneMm driver if they are not
>> dynamic such as Dynamic or DynamicEx because PCD services are not
>> readily available in the Standalone MM environment. Platforms that
>> use Standalone MM today, must define these PCDs as FixedAtBuild in
>> their platform build. However, the PCDs do allow platforms to treat
>> the PCDs as Dynamic/DynamicEx and being able to support that is
>> currently a gap for Standalone MM.
>>
>> This patch series introduces a HOB that can be produced by the
>> platform to provide the same information. The HOB list is
>> available to Standalone MM.
>>
>> The PCD declarations are left as-is in MdeModulePkg for backward
>> compatibility. This means unless a platform wants to use the HOB,
>> their code will continue to work with no change (they do not need
>> to produce the HOB). Only if the HOB is found, is its value used
>> instead of the PCDs.
>>
>> Cc: Jian J Wang <jian.j.wang@intel.com>
>> Cc: Hao A Wu <hao.a.wu@intel.com>
>> Cc: Liming Gao <gaoliming@byosoft.com.cn>
>> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com
>>
>> Michael Kubacki (3):
>>    MdeModulePkg: Add Variable Flash Info HOB
>>    MdeModulePkg/Variable: Consume Variable Info HOB
>>    MdeModulePkg/FaultTolerantWrite: Consume Variable Info HOB
>>
>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/FtwMisc.c                          |
>> 111 +++++++++++++++++---
>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/UpdateWorkingBlock.c
>> |   7 +-
>>   MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.c
>> |  92 ++++++++++++++--
>>   MdeModulePkg/Universal/Variable/Pei/Variable.c                                  |  66
>> +++++++++++-
>>   MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c                           |  42
>> ++++++++
>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c                        |
>> 25 ++++-
>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableNonVolatile.c
>> |  20 +++-
>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c                        |
>> 20 +++-
>>   MdeModulePkg/Include/Guid/VariableFlashInfo.h                                   |  36
>> +++++++
>>   MdeModulePkg/MdeModulePkg.dec                                                   |   4 +
>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.h
>> |   9 +-
>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
>> |  11 +-
>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf
>> |  11 +-
>>
>> MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandalon
>> eMm.inf |  11 +-
>>   MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf
>> |  10 +-
>>   MdeModulePkg/Universal/Variable/Pei/Variable.h                                  |   2 +
>>   MdeModulePkg/Universal/Variable/Pei/VariablePei.inf                             |   6 +-
>>   MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h                           |  17
>> +++
>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
>> |   6 +-
>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf                      |
>> 6 +-
>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf
>> |   6 +-
>>   21 files changed, 455 insertions(+), 63 deletions(-)
>>   create mode 100644 MdeModulePkg/Include/Guid/VariableFlashInfo.h
>>
>> --
>> 2.28.0.windows.1
>>
>>
>>
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> 
> 
> 
> 
> 


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Re: [edk2-devel] [PATCH v1 0/3] Add Variable Flash Info HOB

Posted by Michael Kubacki 2 years ago

Hi Hao,

I addressed all of your feedback including abstraction of the 
information with a library API in v2. It did help clean up the 
consumption code quite a bit.

https://edk2.groups.io/g/devel/message/88649

Thanks,
Michael

On 4/7/2022 7:56 PM, Michael Kubacki wrote:
> Yes, I considered that as well but I was not sure if it was worth adding 
> a new library just for that. I agree though that the code should not be 
> duplicated. I will look into it and include your other suggestions in a 
> v2 series.
> 
> Thanks,
> Michael
> 
> On 4/6/2022 11:31 PM, Wu, Hao A wrote:
>> Sorry for a question:
>> GetVariableFlashInfo() seems being defined multiple times across 
>> modules, do you see value in abstracting it as a library API?
>>
>> Best Regards,
>> Hao Wu
>>
>>> -----Original Message-----
>>> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Michael
>>> Kubacki
>>> Sent: Thursday, April 7, 2022 12:27 AM
>>> To: devel@edk2.groups.io
>>> Cc: Wang, Jian J <jian.j.wang@intel.com>; Wu, Hao A 
>>> <hao.a.wu@intel.com>;
>>> Gao, Liming <gaoliming@byosoft.com.cn>
>>> Subject: [edk2-devel] [PATCH v1 0/3] Add Variable Flash Info HOB
>>>
>>> From: Michael Kubacki <michael.kubacki@microsoft.com>
>>>
>>> REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3479
>>>
>>> The UEFI variable drivers such as VariableRuntimeDxe, VariableSmm,
>>> VariableStandaloneMm, etc. (and their dependent protocol/library
>>> stack), typically acquire UEFI variable store flash information
>>> with PCDs declared in MdeModulePkg.
>>>
>>> For example:
>>> [Pcd]
>>>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase
>>>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
>>>    gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize
>>>
>>> These PCDs work as-is in the StandaloneMm driver if they are not
>>> dynamic such as Dynamic or DynamicEx because PCD services are not
>>> readily available in the Standalone MM environment. Platforms that
>>> use Standalone MM today, must define these PCDs as FixedAtBuild in
>>> their platform build. However, the PCDs do allow platforms to treat
>>> the PCDs as Dynamic/DynamicEx and being able to support that is
>>> currently a gap for Standalone MM.
>>>
>>> This patch series introduces a HOB that can be produced by the
>>> platform to provide the same information. The HOB list is
>>> available to Standalone MM.
>>>
>>> The PCD declarations are left as-is in MdeModulePkg for backward
>>> compatibility. This means unless a platform wants to use the HOB,
>>> their code will continue to work with no change (they do not need
>>> to produce the HOB). Only if the HOB is found, is its value used
>>> instead of the PCDs.
>>>
>>> Cc: Jian J Wang <jian.j.wang@intel.com>
>>> Cc: Hao A Wu <hao.a.wu@intel.com>
>>> Cc: Liming Gao <gaoliming@byosoft.com.cn>
>>> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com
>>>
>>> Michael Kubacki (3):
>>>    MdeModulePkg: Add Variable Flash Info HOB
>>>    MdeModulePkg/Variable: Consume Variable Info HOB
>>>    MdeModulePkg/FaultTolerantWrite: Consume Variable Info HOB
>>>
>>>   
>>> MdeModulePkg/Universal/FaultTolerantWriteDxe/FtwMisc.c                          
>>> |
>>> 111 +++++++++++++++++---
>>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/UpdateWorkingBlock.c
>>> |   7 +-
>>>   MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.c
>>> |  92 ++++++++++++++--
>>>   
>>> MdeModulePkg/Universal/Variable/Pei/Variable.c                                  
>>> |  66
>>> +++++++++++-
>>>   
>>> MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c                           
>>> |  42
>>> ++++++++
>>>   
>>> MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c                        
>>> |
>>> 25 ++++-
>>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableNonVolatile.c
>>> |  20 +++-
>>>   
>>> MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.c                        
>>> |
>>> 20 +++-
>>>   
>>> MdeModulePkg/Include/Guid/VariableFlashInfo.h                                   
>>> |  36
>>> +++++++
>>>   
>>> MdeModulePkg/MdeModulePkg.dec                                                   
>>> |   4 +
>>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWrite.h
>>> |   9 +-
>>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
>>> |  11 +-
>>>   MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.inf
>>> |  11 +-
>>>
>>> MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandalon
>>> eMm.inf |  11 +-
>>>   MdeModulePkg/Universal/FaultTolerantWritePei/FaultTolerantWritePei.inf
>>> |  10 +-
>>>   
>>> MdeModulePkg/Universal/Variable/Pei/Variable.h                                  
>>> |   2 +
>>>   
>>> MdeModulePkg/Universal/Variable/Pei/VariablePei.inf                             
>>> |   6 +-
>>>   
>>> MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.h                           
>>> |  17
>>> +++
>>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
>>> |   6 +-
>>>   
>>> MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmm.inf                      
>>> |
>>> 6 +-
>>>   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf
>>> |   6 +-
>>>   21 files changed, 455 insertions(+), 63 deletions(-)
>>>   create mode 100644 MdeModulePkg/Include/Guid/VariableFlashInfo.h
>>>
>>> -- 
>>> 2.28.0.windows.1
>>>
>>>
>>>
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>>
>>
>>
>> 
>>


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