From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail05.groups.io (mail05.groups.io [45.79.224.7]) by spool.mail.gandi.net (Postfix) with ESMTPS id 0A33F740039 for ; Mon, 5 May 2025 17:33:28 +0000 (UTC) DKIM-Signature: a=rsa-sha256; bh=z8h/ldTbagi5XfMrSmrQrgqQlXQgfU9mp0d7LcBQ0NM=; c=relaxed/simple; d=groups.io; h=From:To:Subject:Thread-Topic:Thread-Index:Date:Message-ID:Accept-Language:MIME-Version:Precedence:List-Subscribe:List-Help:Sender:List-Id:Mailing-List:Delivered-To:Resent-Date:Resent-From:Reply-To:List-Unsubscribe-Post:List-Unsubscribe:Content-Language:Content-Type; s=20240830; t=1746466408; v=1; x=1746725607; b=tVLw2o53oAkEtrPdoe9B7+5DrjvFmaNMHJNM7IHzPXZyA6CGISSmzKN197hboit69gs84y3l 1InCzJJiss/GI063mQPkLzgaGfvJ9pYni2tED2IaWDGranRPCdz77QfHCJVb0WAxd/l2AlXt8yK tSjgsY3+T9P10ANIEFj0iD6MEoYqE/NO9iFe8b3kDBKzhOzr8w1WkAaCD22oQnuh0Yf/ZPnL4hD dyBxL79vtn5FblwL+e7X5cszX8PAeOqyz/6xoBBtOS+q1ooUAAcY5vCJth51BWyjzqgbW68NSpO JiGn9of9kQVfX9OZNInaQc3jfqd1x1e7x0BKvJau81CoQ== 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X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8c8c18f6-76e9-4eeb-9238-a7b3da7871d8 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 0Ry4suzggN2MLC+OsAapJHIBzHGwhigxFOKHcAb8zziFSSJQZHAQUtedX7moQHZ035sOiu63OWw+r/RQYuKSnA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: KL1PR02MB6978 Precedence: Bulk List-Subscribe: List-Help: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Resent-Date: Mon, 05 May 2025 10:33:26 -0700 Resent-From: tim.lewis@insyde.com Reply-To: devel@edk2.groups.io,tim.lewis@insyde.com List-Unsubscribe-Post: List-Unsubscribe=One-Click List-Unsubscribe: X-Gm-Message-State: V7OkVJnFFmDY4NMKFUlG0YXxx7686176AA= Content-Language: en-US Content-Type: multipart/related; boundary="_005_TYSPR02MB8447A8172CF62FEACDDB46ED838E2TYSPR02MB8447apcp_"; type="multipart/alternative" X-GND-Status: MCE Authentication-Results: spool.mail.gandi.net; dkim=pass header.d=groups.io header.s=20240830 header.b=tVLw2o53; dmarc=pass (policy=none) header.from=groups.io; spf=pass (spool.mail.gandi.net: domain of bounce@groups.io designates 45.79.224.7 as permitted sender) smtp.mailfrom=bounce@groups.io --_005_TYSPR02MB8447A8172CF62FEACDDB46ED838E2TYSPR02MB8447apcp_ Content-Type: multipart/alternative; boundary="_000_TYSPR02MB8447A8172CF62FEACDDB46ED838E2TYSPR02MB8447apcp_" --_000_TYSPR02MB8447A8172CF62FEACDDB46ED838E2TYSPR02MB8447apcp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Can we discuss the EDK2 extension to allow bitfield varstores that is not a= compatible changes and, in fact, inhibits the UEFI spec from going in cert= ain directions. Back in 2017, the EDK2 version of the browser added the EDKII_IFR_BIT_VARS= TORE_GUID, which, if present, tells the EDK2 form browser to change the mea= ning of almost all fields related to storage, including VarOffset, size and= uses the bottom 6 bits of the Flags field in the question header. However, these changes are not found in the UEFI specifications. As a resul= t, any "compliant" browser cannot correctly deal with questions that requir= e these extensions. It is not problem if the form is built at the same time= as the rest of the firmware, but 3rd party drivers, UEFI applications and= option ROMs cannot assume that this support is present. We have run into this when thinking about creating a proposal for the UEFI = specification and found that adding bits in the Flags field doesn't work fo= r checkbox, one-of and numeric questions because those bits are already co-= opted by this EDK2 extension and this EDK2 extension is being used by some = 3rd party drivers. How did this ever get approved by the maintainers? Thanks, Tim [cid:image002.png@01DBBDA9.1F3EE5A0] Tim Lewis CTO Insyde Software Phone: +1-916-813-6838 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#121305): https://edk2.groups.io/g/devel/message/121305 Mute This Topic: https://groups.io/mt/112634275/7686176 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [rebecca@openfw.io] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- --_000_TYSPR02MB8447A8172CF62FEACDDB46ED838E2TYSPR02MB8447apcp_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Can we discuss the EDK2 extension to= allow bitfield varstores that is not a compatible changes and, in fact, in= hibits the UEFI spec from going in certain directions.

 

Back in  2017, the EDK2 version= of the browser added the EDKII_IFR_BIT_VARSTORE_GUID, which, if present, t= ells the EDK2 form browser to change the meaning of almost all fields related to storage, including VarOffset, size and uses t= he bottom 6 bits of the Flags field in the question header.

 

However, these changes are not found= in the UEFI specifications. As a result, any “compliant” brows= er cannot correctly deal with questions that require these extensions. It is not problem if the form is built at the same time as the= rest of the firmware, but 3rd party  drivers, UEFI applica= tions and option ROMs cannot assume that this support is present.

 

We have run into this when thinking = about creating a proposal for the UEFI specification and found that adding = bits in the Flags field doesn’t work for checkbox, one-of and numeric questions because those bits are already co-opted by th= is EDK2 extension and this EDK2 extension is being used by some 3rd party drivers.

 

How did this ever get approved by th= e maintainers?

 

 

Thanks,

 

Tim

 

 

Tim Lewis CTO

Insyde Software 

Phone: +1-916-813-6838

 

 

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Your Subscriptio= n | Contact Group Owner | Unsubscribe [rebecca@openfw.io]

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