Re: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix BcdRevision is not match with SMBIOS version

["Guo, Gua" <gua.guo@intel.com>]

[-- Attachment #1.1: Type: text/plain, Size: 19941 bytes --]

I think currently MdeModulePkg/SmbiosDxe: Fix BcdRevision is not match with SMBIOS version by liencx * Pull Request #4771 * tianocore/edk2 (github.com)<https://github.com/tianocore/edk2/pull/4771/> logic is correctly, so I want to give the patch Reviewed-by.

Currently,
  EntryPointStructureData.MinorVersion allow HEX (mPrivateData.Smbios.MajorVersion) (0 - 0xFF)
  EntryPointStructureData.MajorVersion allow HEX (mPrivateData.Smbios.MinorVersion) (0 - 0xFF)
  EntryPointStructureData.SmbiosBcdRevision allow BCD only value (0x[0-9][0-9]), otherwise, 0

These items is assigned here
[cid:image004.png@01D9EDF6.3DEB5170]

Thanks,
Gua
From: Kinney, Michael D <michael.d.kinney@intel.com>
Sent: Saturday, September 23, 2023 12:20 AM
To: Guo, Gua <gua.guo@intel.com>; devel@edk2.groups.io; Lien, HoraceX <horacex.lien@intel.com>; Gao, Liming <gaoliming@byosoft.com.cn>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com>; Bi, Dandan <dandan.bi@intel.com>; Zeng, Star <star.zeng@intel.com>; Gao, Zhichao <zhichao.gao@intel.com>; Kinney, Michael D <michael.d.kinney@intel.com>
Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix BcdRevision is not match with SMBIOS version

I agree that if either the Major or Minor value of the version can not be represented in BCD format that setting then entire value to zero is correct.  Please update with that logic.

Mike

From: Guo, Gua <gua.guo@intel.com<mailto:gua.guo@intel.com>>
Sent: Thursday, September 21, 2023 10:10 PM
To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Guo, Gua <gua.guo@intel.com<mailto:gua.guo@intel.com>>; Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>; Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>; Gao, Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>
Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix BcdRevision is not match with SMBIOS version

Hi Mike

Is it still have concern ? I think the patch just code enhance, it shouldn't have side effects, but also make the Edk2 code stronger for error handle, it should be good.

Thanks,
Gua

From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>> On Behalf Of Guo, Gua
Sent: Wednesday, September 20, 2023 9:52 AM
To: Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>; Gao, Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>
Subject: Re: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix BcdRevision is not match with SMBIOS version

In fact, spec say MajorVersion (Offset 06h) and MinorVersion (Offset 07h) are duplicate item with BCD Revision (Offset 1Eh), if it duplicate item, I think the value should be the same.

BCD Revision only exist on 32-bit Entry Point (_SM_), on 64-bit Entry Point (_SM3_) is obsolete, so I guess SMBIOS organization may think it make someone confusion, so it obsolete on 64-bit Entry Point, but for 32-bit Entry Point, maybe we need to let MajorVersion (Offset 06h) and MinorVersion (Offset 07h) as same as BCD Revision (Offset 1Eh). And also have better error handle for out of BCD format.

[cid:image001.png@01D9EDF5.CA0AB4D0]

Thanks,
Gua

From: Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>
Sent: Wednesday, September 20, 2023 9:35 AM
To: Guo, Gua <gua.guo@intel.com<mailto:gua.guo@intel.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>; Gao, Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>; Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>
Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix BcdRevision is not match with SMBIOS version

What is the difference between "version of the specification implemented in table structures" and "compliance with a revision of this specification"?

Is it really a spec violation for them to be difference values?

Mike

From: Guo, Gua <gua.guo@intel.com<mailto:gua.guo@intel.com>>
Sent: Tuesday, September 19, 2023 6:03 PM
To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>; Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>; Gao, Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>
Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix BcdRevision is not match with SMBIOS version


Hi Mike



May I get your comment and hope it can eliminate your concern ?



Question1: Let's back why this change need to do the enhance.

From

>    EntryPointStructureData.MajorVersion      = mPrivateData.Smbios.MajorVersion;

>    EntryPointStructureData.MinorVersion      = mPrivateData.Smbios.MinorVersion;

>    EntryPointStructureData.SmbiosBcdRevision = (UINT8)((PcdGet16 (PcdSmbiosVersion) >> 4) & 0xf0) | (UINT8)(PcdGet16 (PcdSmbiosVersion) & 0x0f);

To

>    EntryPointStructureData.MajorVersion      = mPrivateData.Smbios.MajorVersion;

>    EntryPointStructureData.MinorVersion      = mPrivateData.Smbios.MinorVersion;

>    EntryPointStructureData.SmbiosBcdRevision = ((mPrivateData.Smbios.MajorVersion & 0x0f) << 4) | (mPrivateData.Smbios.MinorVersion & 0x0f);



Answer1:

If mPrivateData.Smbios.MajorVersion equal to 3h and mPrivateData.Smbios.MajorVersion equal to 4h means (Spec Version 3.4), but  PcdSmbiosVersion = 0305h will cause SmbiosBcdRevision become 35h (Spec Version 3.5).

3.4 != 3.5 violate SMBIOS spec, so I think the change is reasonable to prevent this case happening.



Question2: Forcing to 0 does not sound right.



Answer2: I think it maybe reasonable based on below description.



Ref to SMBIOS Spec: https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.7.0.pdf -> Section 5.2.1

SMBIOS Spec mention on MajorVersion (Offset 06h) = 0Ah and MinorVersion (Offset 07h) = 11 range have chance 10.22, this example is out of BCD format

[cid:image002.png@01D9EDF5.CA0AB4D0]



For this case, Spec have allow to set to 00h to ignore the SMBIOS BCD Revision (Offset 1Eh), when it happen, only consider SMBIOS Major Version (Offset 06h) and SMBIOS Minor Version (Offset 07h).

[cid:image003.png@01D9EDF5.CA0AB4D0]







Thanks,

Gua



-----Original Message-----
From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>> On Behalf Of Michael D Kinney
Sent: Friday, September 15, 2023 1:48 AM
To: Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Gao, Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>
Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>; Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>
Subject: Re: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix BcdRevision is not match with SMBIOS version



Forcing to 0 does not sound right.



You did not answer my question about the property of the global variables.



Without knowing the format of the information in the global variables you cannot safely use them.  If they are in BCD then no need to check for out of range.  If they are hex values, then you have to use conversion functions.



Mike



> -----Original Message-----

> From: Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>

> Sent: Thursday, September 14, 2023 2:33 AM

> To: Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>;

> devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Gao, Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>

> Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan

> <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao

> <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>

> Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix

> BcdRevision is not match with SMBIOS version

>

> Hi Mike,

>

> https://github.com/tianocore/edk2/pull/4771

> I have changed code following rule: It is only accept range 0-9 for

> Major and Minor version to fill in SmbiosBcdRevision, if one of Major

> or Minor is greater than 9 then fill in 00h.

>

> Please help to review this, thanks :)

>

> Thanks,

> Horace Lien

>

> -----Original Message-----

> From: Lien, HoraceX

> Sent: Friday, September 8, 2023 5:35 PM

> To: Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>;

> devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Gao, Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>

> Cc: Liu, Zhiguang <Zhiguang.Liu@intel.com<mailto:Zhiguang.Liu@intel.com>>; Bi, Dandan

> <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao

> <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>

> Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix

> BcdRevision is not match with SMBIOS version

>

> Hi Mike,

>

> No, we didn't guarantee this before. Add comments to descript BCD

> field is good point.

> I have reviewed SMBIOS spec for SmbiosBcdRevision field, it mentions

> "If the value is 00h, only the Major and Minor Versions in offsets 6

> and 7 of the Entry Point Structure provide the version information. ".

> So, I have new idea to implement this, I will filter range 0-9 for

> Major/Minor version to fill in SmbiosBcdRevision, if one of Major or

> Minor is greater than 9 then fill in 00h.

> Do you think it is ok?

>

> Thanks for your reply.

>

> Thanks,

> Horace Lien

>

> -----Original Message-----

> From: Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>

> Sent: Friday, September 8, 2023 6:05 AM

> To: Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>; devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Gao,

> Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>

> Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan

> <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao

> <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>; Kinney, Michael D

> <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>

> Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix

> BcdRevision is not match with SMBIOS version

>

> I was asking about the property of the global variables being used in

> this patch.  Are they already guaranteed to be in BSD format and in

> range 0..9.  If so, then no additional code changes would be required.

> However, it would be good to add comments about the properties of

> those global variables and why they can be used to directly assign to

> fields that are required to be in BSD format.

>

> Mike

>

> > -----Original Message-----

> > From: Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>

> > Sent: Thursday, September 7, 2023 2:41 AM

> > To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Kinney, Michael D

> > <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>; Gao, Liming <gaoliming@byosoft.com.cn<mailto:gaoliming@byosoft.com.cn>>

> > Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan

> > <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao,

> > Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>; Lien, HoraceX

> > <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>

> > Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix

> > BcdRevision is not match with SMBIOS version

> >

> > Hi Mike,

> >

> > Could you please reply for me?

> > If you want to filter range 0-9, then I will send PR again.

> >

> > Thanks,

> > Horace Lien

> >

> > -----Original Message-----

> > From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>> On Behalf Of Lien,

> > HoraceX

> > Sent: Friday, September 1, 2023 3:06 PM

> > To: Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>;

> > devel@edk2.groups.io<mailto:devel@edk2.groups.io>

> > Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan

> > <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao,

> > Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>

> > Subject: Re: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix

> > BcdRevision is not match with SMBIOS version

> >

> > Hi Mike,

> >

> > I have change code to

> > EntryPointStructureData.SmbiosBcdRevision =

> > ((mPrivateData.Smbios.MajorVersion & 0x0f) << 4) |

> > (mPrivateData.Smbios.MinorVersion & 0x0f); Add &0x0F to mask upper

> > nibble bit, do we still need to guarantee that range is between 0-9?

> > Because the old code only filtered 4 bits, instead of accurately

> > filtering the number range 0-9.

> >

> > Thanks,

> > Horace Lien

> >

> > -----Original Message-----

> > From: Kinney, Michael D <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>

> > Sent: Thursday, August 31, 2023 11:56 PM

> > To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>

> > Cc: Liu, Zhiguang <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan

> > <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng, Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao,

> > Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>; Kinney, Michael D

> > <michael.d.kinney@intel.com<mailto:michael.d.kinney@intel.com>>

> > Subject: RE: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix

> > BcdRevision is not match with SMBIOS version

> >

> > Are mPrivateData.Smbios.MajorVersion and

> > mPrivateData.Smbios.MinorVersion guaranteed to be in range 0..9?

> >

> > Mike

> >

> > > -----Original Message-----

> > > From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> <devel@edk2.groups.io<mailto:devel@edk2.groups.io>> On Behalf Of

> > > horacex.lien@intel.com<mailto:horacex.lien@intel.com>

> > > Sent: Wednesday, August 30, 2023 2:13 AM

> > > To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>

> > > Cc: Lien, HoraceX <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>; Liu, Zhiguang

> > > <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>; Bi, Dandan <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>; Zeng,

> > > Star <star.zeng@intel.com<mailto:star.zeng@intel.com>>; Gao, Zhichao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>

> > > Subject: [edk2-devel] [PATCH] MdeModulePkg/SmbiosDxe: Fix

> > > BcdRevision is not match with SMBIOS version

> > >

> > > From: HoraceX Lien <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>

> > >

> > > REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4544

> > >

> > > These value of Major/Minor version are updated from SMBIOS memory

> > > data, but BCD Revision is updated from PCD PcdSmbiosVersion.

> > > We should also update PCD PcdSmbiosVersion from SMBIOS memory

> > > data, to ensure that get consistent version value.

> > >

> > > Cc: Zhiguang Liu <zhiguang.liu@intel.com<mailto:zhiguang.liu@intel.com>>

> > > Cc: Dandan Bi <dandan.bi@intel.com<mailto:dandan.bi@intel.com>>

> > > Cc: Star Zeng <star.zeng@intel.com<mailto:star.zeng@intel.com>>

> > > Cc: Zhichao Gao <zhichao.gao@intel.com<mailto:zhichao.gao@intel.com>>

> > > Signed-off-by: HoraceX Lien <horacex.lien@intel.com<mailto:horacex.lien@intel.com>>

> > > ---

> > >  MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c | 2 +-

> > >  1 file changed, 1 insertion(+), 1 deletion(-)

> > >

> > > diff --git a/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c

> > > b/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c

> > > index 1a86e69d3c..e3f6215033 100644

> > > --- a/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c

> > > +++ b/MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.c

> > > @@ -1072,7 +1072,7 @@ SmbiosCreateTable (

> > >      DEBUG ((DEBUG_INFO, "SmbiosCreateTable: Initialize 32-bit

> > > entry point structure\n"));

> > >

> > >      EntryPointStructureData.MajorVersion      =

> > > mPrivateData.Smbios.MajorVersion;

> > >

> > >      EntryPointStructureData.MinorVersion      =

> > > mPrivateData.Smbios.MinorVersion;

> > >

> > > -    EntryPointStructureData.SmbiosBcdRevision = (UINT8)((PcdGet16

> > > (PcdSmbiosVersion) >> 4) & 0xf0) | (UINT8)(PcdGet16

> > > (PcdSmbiosVersion) & 0x0f);

> > >

> > > +    EntryPointStructureData.SmbiosBcdRevision =

> > > (mPrivateData.Smbios.MajorVersion << 4) |

> > > mPrivateData.Smbios.MinorVersion;

> > >

> > >      PhysicalAddress                           = 0xffffffff;

> > >

> > >      Status                                    = gBS->AllocatePages (

> > >

> > >

> > > AllocateMaxAddress,

> > >

> > > --

> > > 2.31.1.windows.1

> > >

> > >

> > >

> > > -=-=-=-=-=-=

> > > Groups.io Links: You receive all messages sent to this group.

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> > > [michael.d.kinney@intel.com]

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> > >

> >

> >

> >

> >

> >















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