From nobody Sat Feb 7 12:34:54 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) client-ip=66.175.222.108; envelope-from=bounce+27952+88462+1787277+3901457@groups.io; helo=mail02.groups.io; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+88462+1787277+3901457@groups.io; dmarc=fail(p=none dis=none) header.from=linux.microsoft.com ARC-Seal: i=1; a=rsa-sha256; t=1649262436; cv=none; d=zohomail.com; s=zohoarc; b=GjVkhpLvU59uCxA8PQQfg5Hj5rNLvZwq1XiMuzgLIgnY4xfpclzHfV9+Kj8R8ZmrVewOhHuT4pY1UyjAmOZoW+5hLDlXCJ3lfgDDJalHm4KbdvM3oP48bHH53bhYVbN/6EHpOzVCq8ReN33jefhC9jAgHoFW4Qev4sscZO2cUSY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1649262436; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=YOhMoOvuj11Bh/GAfONJ7TN0ESbH7q6h5VAbtnCcqwc=; b=Rnnu26eCc0hEqo13JViWRn4rbIu3lgMZgU1zAhenxoE+/qyFXDt83duyVd6b5TXhxOly4bRGcn7zNHPwpxDSSgsUnGE6Tj+znbTPbqUdAlTkiv53zb6EkQZxkdmO87b10ikfpJaHCamNFmmc6gzxr8rpONa5Pxuom2ZF0IS0v8M= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+88462+1787277+3901457@groups.io; dmarc=fail header.from= (p=none dis=none) Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by mx.zohomail.com with SMTPS id 1649262436064966.3809365799445; Wed, 6 Apr 2022 09:27:16 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id KBqTYY1788612xTw6SLknTS9; Wed, 06 Apr 2022 09:27:15 -0700 X-Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by mx.groups.io with SMTP id smtpd.web12.10985.1649262434949161637 for ; Wed, 06 Apr 2022 09:27:15 -0700 X-Received: from localhost.localdomain (unknown [47.201.46.36]) by linux.microsoft.com (Postfix) with ESMTPSA id 97C5420DFD99; Wed, 6 Apr 2022 09:27:13 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 97C5420DFD99 From: "Michael Kubacki" To: devel@edk2.groups.io Cc: Jian J Wang , Hao A Wu , Liming Gao Subject: [edk2-devel] [PATCH v1 1/3] MdeModulePkg: Add Variable Flash Info HOB Date: Wed, 6 Apr 2022 12:26:46 -0400 Message-Id: <20220406162648.234-2-mikuback@linux.microsoft.com> In-Reply-To: <20220406162648.234-1-mikuback@linux.microsoft.com> References: <20220406162648.234-1-mikuback@linux.microsoft.com> MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: List-Subscribe: List-Help: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,mikuback@linux.microsoft.com X-Gm-Message-State: iRLPfgzR0uISpuCrtNKfva2wx1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1649262435; bh=0HL3bNdulc0dv+mZXdQEjigUcfzJH7vQSU2mXVIOiSg=; h=Cc:Date:From:Reply-To:Subject:To; b=tJh/8gpcDNzU2PsXile9uqOaGcehRX2D4Pq8Q8rkExsagrIA+j4xDmcyai8Td5Zjuno 5prz7nbfFyn3dooMobaESoIlOX1sfVcLD7C0OM6f3RS3BM25gZMUrJW2/WArtDYo1sVH4 I42r/mAQQPgk/Z8xAEMdw0RjLa3FwqkFuKU= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1649262436539100001 Content-Type: text/plain; charset="utf-8" From: Michael Kubacki REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3D3479 Adds a new GUID that is used to identify a HOB that passes variable flash information to UEFI variable drivers in HOB consumption phases such as DXE, Traditional MM, and Standalone MM. This information was previously passed directly with PCDs such as EfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase and gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize. However, the Standalone MM variable driver instance does not have direct access to the PCD database. Therefore, this HOB will first be considered as the source for variable flash information and if platforms do not produce the HOB, reading the information from the PCDs directly will be a backup to provide backward compatibility. Cc: Jian J Wang Cc: Hao A Wu Cc: Liming Gao Signed-off-by: Michael Kubacki --- MdeModulePkg/Include/Guid/VariableFlashInfo.h | 36 ++++++++++++++++++++ MdeModulePkg/MdeModulePkg.dec | 4 +++ 2 files changed, 40 insertions(+) diff --git a/MdeModulePkg/Include/Guid/VariableFlashInfo.h b/MdeModulePkg/I= nclude/Guid/VariableFlashInfo.h new file mode 100644 index 000000000000..07aaa69fb748 --- /dev/null +++ b/MdeModulePkg/Include/Guid/VariableFlashInfo.h @@ -0,0 +1,36 @@ +/** @file + This file defines the GUID and data structure used to pass information a= bout + a variable store mapped on flash (i.e. a MMIO firmware volume) to the DX= E and MM environment. + + Copyright (c) Microsoft Corporation.
+ + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#ifndef VARIABLE_FLASH_INFO_H_ +#define VARIABLE_FLASH_INFO_H_ + +#define VARIABLE_FLASH_INFO_HOB_GUID \ + { 0x5d11c653, 0x8154, 0x4ac3, { 0xa8, 0xc2, 0xfb, 0xa2, 0x89, 0x20, 0xfc= , 0x90 }} + +extern EFI_GUID gVariableFlashInfoHobGuid; + +#pragma pack (push, 1) + +/// +/// This structure can be used to describe UEFI variable +/// flash information. +/// +typedef struct { + EFI_PHYSICAL_ADDRESS NvStorageBaseAddress; + UINT64 NvStorageLength; + EFI_PHYSICAL_ADDRESS FtwSpareBaseAddress; + UINT64 FtwSpareLength; + EFI_PHYSICAL_ADDRESS FtwWorkingBaseAddress; + UINT64 FtwWorkingLength; +} VARIABLE_FLASH_INFO; + +#pragma pack (pop) + +#endif diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec index cf79292ec877..4e82f5836096 100644 --- a/MdeModulePkg/MdeModulePkg.dec +++ b/MdeModulePkg/MdeModulePkg.dec @@ -226,6 +226,10 @@ [Guids] # Include/Guid/SmmVariableCommon.h gSmmVariableWriteGuid =3D { 0x93ba1826, 0xdffb, 0x45dd, { 0x82, 0xa7, 0= xe7, 0xdc, 0xaa, 0x3b, 0xbd, 0xf3 }} =20 + ## Guid of the variable flash information HOB. + # Include/Guid/VariableFlashInfo.h + gVariableFlashInfoHobGuid =3D { 0x5d11c653, 0x8154, 0x4ac3, { 0xa8, 0xc2= , 0xfb, 0xa2, 0x89, 0x20, 0xfc, 0x90 }} + ## Performance protocol guid that also acts as the performance HOB guid = and performance variable GUID # Include/Guid/Performance.h gPerformanceProtocolGuid =3D { 0x76B6BDFA, 0x2ACD, 0x4462, { 0x9E,= 0x3F, 0xCB, 0x58, 0xC9, 0x69, 0xD9, 0x37 } } --=20 2.28.0.windows.1 -=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 (#88462): https://edk2.groups.io/g/devel/message/88462 Mute This Topic: https://groups.io/mt/90293663/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-