From: Laszlo Ersek <lersek@redhat.com>
To: edk2-devel-01 <edk2-devel@ml01.01.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Subject: [PATCH 10/14] OvmfPkg: introduce FlashNvStorageAddressLib
Date: Wed, 15 Mar 2017 00:32:42 +0100 [thread overview]
Message-ID: <20170314233246.17864-11-lersek@redhat.com> (raw)
In-Reply-To: <20170314233246.17864-1-lersek@redhat.com>
An OVMF binary built with
-D SMM_REQUIRE
or with
-D MEM_VARSTORE_EMU_ENABLE=FALSE
requires flash to be present at the expected (build-time determined)
location; falling back to the emulated varstore is not possible.
In such builds, we can replace the settings of the
- varstore,
- FTW working block,
- and FTW spare area
address PCDs in QemuFlashFvbServicesRuntimeDxe with identical settings in
a new plug-in (NULL class) library, to be linked into variable-related
PEIMs.
This will enable such builds to access variables during the PEI phase,
without dynamic flash detection and without ordering constraints against
other PEIMs.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---
OvmfPkg/Library/FlashNvStorageAddressLib/FlashNvStorageAddressLib.inf | 48 ++++++++++++++++++
OvmfPkg/Library/FlashNvStorageAddressLib/FlashNvStorageAddressLib.c | 53 ++++++++++++++++++++
2 files changed, 101 insertions(+)
diff --git a/OvmfPkg/Library/FlashNvStorageAddressLib/FlashNvStorageAddressLib.inf b/OvmfPkg/Library/FlashNvStorageAddressLib/FlashNvStorageAddressLib.inf
new file mode 100644
index 000000000000..f79194f80de9
--- /dev/null
+++ b/OvmfPkg/Library/FlashNvStorageAddressLib/FlashNvStorageAddressLib.inf
@@ -0,0 +1,48 @@
+## @file
+#
+# A hook-in library for variable-related PEIMs, in order to set
+# - gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64,
+# - gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase,
+# - gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase,
+# from their gUefiOvmfPkgTokenSpaceGuid counterparts, just before those PEIMs
+# consume them.
+#
+# Copyright (C) 2017, Red Hat, Inc.
+#
+# This program and the accompanying materials are licensed and made available
+# under the terms and conditions of the BSD License which accompanies this
+# distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+# WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+ INF_VERSION = 1.25
+ BASE_NAME = FlashNvStorageAddressLib
+ FILE_GUID = 5FF5A9F9-D01E-49EC-9A17-1682FC85122F
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = FlashNvStorageAddressLib|PEIM
+ CONSTRUCTOR = SetFlashNvStorageAddresses
+
+[Sources]
+ FlashNvStorageAddressLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ PcdLib
+
+[Pcd]
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase
+ gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageFtwSpareBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageFtwWorkingBase
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageVariableBase
diff --git a/OvmfPkg/Library/FlashNvStorageAddressLib/FlashNvStorageAddressLib.c b/OvmfPkg/Library/FlashNvStorageAddressLib/FlashNvStorageAddressLib.c
new file mode 100644
index 000000000000..dc1280cc23f1
--- /dev/null
+++ b/OvmfPkg/Library/FlashNvStorageAddressLib/FlashNvStorageAddressLib.c
@@ -0,0 +1,53 @@
+/** @file
+
+ A hook-in library for variable-related PEIMs, in order to set
+ - gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64,
+ - gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase,
+ - gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase,
+ from their gUefiOvmfPkgTokenSpaceGuid counterparts, just before those PEIMs
+ consume them.
+
+ Copyright (C) 2017, Red Hat, Inc.
+
+ This program and the accompanying materials are licensed and made available
+ under the terms and conditions of the BSD License which accompanies this
+ distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+ WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Library/PcdLib.h>
+
+RETURN_STATUS
+EFIAPI
+SetFlashNvStorageAddresses (
+ VOID
+ )
+{
+ RETURN_STATUS PcdStatus;
+
+ PcdStatus = PcdSet64S (
+ PcdFlashNvStorageVariableBase64,
+ PcdGet32 (PcdOvmfFlashNvStorageVariableBase)
+ );
+ if (RETURN_ERROR (PcdStatus)) {
+ return PcdStatus;
+ }
+
+ PcdStatus = PcdSet32S (
+ PcdFlashNvStorageFtwWorkingBase,
+ PcdGet32 (PcdOvmfFlashNvStorageFtwWorkingBase)
+ );
+ if (RETURN_ERROR (PcdStatus)) {
+ return PcdStatus;
+ }
+
+ PcdStatus = PcdSet32S (
+ PcdFlashNvStorageFtwSpareBase,
+ PcdGet32 (PcdOvmfFlashNvStorageFtwSpareBase)
+ );
+ return PcdStatus;
+}
--
2.9.3
next prev parent reply other threads:[~2017-03-14 23:33 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-14 23:32 [PATCH 00/14] OvmfPkg: add the Variable PEIM, defragment the UEFI memmap Laszlo Ersek
2017-03-14 23:32 ` [PATCH 01/14] OvmfPkg/EmuVariableFvbRuntimeDxe: always format an auth varstore header Laszlo Ersek
2017-03-14 23:32 ` [PATCH 02/14] OvmfPkg: remove gUefiOvmfPkgTokenSpaceGuid.PcdSecureBootEnable Laszlo Ersek
2017-03-14 23:32 ` [PATCH 03/14] OvmfPkg/PlatformPei: remove unused PcdVariableStoreSize dependency Laszlo Ersek
2017-03-14 23:32 ` [PATCH 04/14] OvmfPkg/PlatformPei: don't allocate reserved mem varstore if SMM_REQUIRE Laszlo Ersek
2017-03-14 23:32 ` [PATCH 05/14] OvmfPkg: introduce PcdMemVarstoreEmuEnable feature flag Laszlo Ersek
2017-03-14 23:32 ` [PATCH 06/14] OvmfPkg/QemuFlashFvbServicesRuntimeDxe: check PcdMemVarstoreEmuEnable Laszlo Ersek
2017-03-14 23:32 ` [PATCH 07/14] OvmfPkg: conditionally disable reserved memory varstore emulation at build Laszlo Ersek
2017-03-14 23:32 ` [PATCH 08/14] OvmfPkg: resolve PcdLib for all PEIMs individually Laszlo Ersek
2017-03-14 23:32 ` [PATCH 09/14] OvmfPkg: resolve PcdLib for PEIMs to PeiPcdLib by default Laszlo Ersek
2017-03-14 23:32 ` Laszlo Ersek [this message]
2017-03-14 23:32 ` [PATCH 11/14] OvmfPkg: include FaultTolerantWritePei and VariablePei Laszlo Ersek
2017-03-14 23:32 ` [PATCH 12/14] OvmfPkg/QemuFlashFvbServicesRuntimeDxe: don't set flash PCDs if SMM or no-emu Laszlo Ersek
2017-03-14 23:32 ` [PATCH 13/14] OvmfPkg/PlatformPei: remedy UEFI memory map fragmentation Laszlo Ersek
2017-03-14 23:32 ` [PATCH 14/14] OvmfPkg/README: document MEM_VARSTORE_EMU_ENABLE and memmap defrag Laszlo Ersek
2017-03-16 18:51 ` [PATCH 00/14] OvmfPkg: add the Variable PEIM, defragment the UEFI memmap Jordan Justen
2017-03-16 21:22 ` Laszlo Ersek
2017-03-22 16:58 ` Laszlo Ersek
2017-03-24 7:38 ` Jordan Justen
2017-03-24 12:49 ` Laszlo Ersek
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