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From: "Sami Mujawar" <sami.mujawar@arm.com>
To: <devel@edk2.groups.io>
CC: Sami Mujawar <sami.mujawar@arm.com>, <ardb+tianocore@kernel.org>,
<quic_llindhol@quicinc.com>, <kraxel@redhat.com>, <Pierre.Gondois@arm.com>,
<Suzuki.Poulose@arm.com>, <jean-philippe@linaro.org>,
<Matteo.Carlini@arm.com>, <Akanksha.Jain2@arm.com>, <Ben.Adderson@arm.com>,
<nd@arm.com>
Subject: [RFC PATCH v1 13/30] ArmVirtPkg: Add NULL instance of ArmCcaInitPeiLib
Date: Tue, 25 Apr 2023 17:04:11 +0100
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Add a NULL instance of ArmCcaInitPeiLib library that guest firmware
for VMMs that do not implement Arm CCA Realms can use.
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
---
ArmVirtPkg/ArmVirt.dsc.inc | 2 +
ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.c | 59 ++++++++++++++++++++
ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.inf | 27 +++++++++
3 files changed, 88 insertions(+)
diff --git a/ArmVirtPkg/ArmVirt.dsc.inc b/ArmVirtPkg/ArmVirt.dsc.inc
index 5b18184be2631ce6d158b471c055af9e6e07f4a0..409749297263a13696885d17c6d5554d07c195e4 100644
--- a/ArmVirtPkg/ArmVirt.dsc.inc
+++ b/ArmVirtPkg/ArmVirt.dsc.inc
@@ -189,6 +189,8 @@ [LibraryClasses.common.SEC]
PeiServicesTablePointerLib|ArmPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
MemoryAllocationLib|MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
+ ArmCcaInitPeiLib|ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.inf
+
[LibraryClasses.common.PEI_CORE]
PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
BaseMemoryLib|MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
diff --git a/ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.c b/ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.c
new file mode 100644
index 0000000000000000000000000000000000000000..5b606208dbcf4f0494cde79dd8923ef80fa0137b
--- /dev/null
+++ b/ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.c
@@ -0,0 +1,59 @@
+/** @file
+ Library that implements a NULL implementation of the ArmCcaInitPeiLib.
+
+ Copyright (c) 2022 - 2023, Arm Limited. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+ @par Glossary:
+ - Rsi or RSI - Realm Service Interface
+ - IPA - Intermediate Physical Address
+ - RIPAS - Realm IPA state
+**/
+
+#include <Library/ArmCcaLib.h>
+#include <Library/ArmCcaRsiLib.h>
+#include <Library/ArmMmuLib.h>
+#include <Library/ArmVirtMemInfoLib.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+
+/**
+ Configure the System Memory region as Protected RAM.
+
+ When a VMM creates a Realm, a small amount of DRAM (which contains the
+ firmware image) and the initial content is configured as Protected RAM.
+ The remaining System Memory is in the Protected Empty state. The firmware
+ must then initialise the remaining System Memory as Protected RAM before
+ it can be accessed.
+
+ @retval RETURN_SUCCESS Success.
+ @retval RETURN_INVALID_PARAMETER A parameter is invalid.
+ @retval RETURN_UNSUPPORTED The execution context is not in a Realm.
+**/
+RETURN_STATUS
+EFIAPI
+ArmCcaConfigureSystemMemory (
+ VOID
+ )
+{
+ return RETURN_UNSUPPORTED;
+}
+
+/**
+ Perform Arm CCA specific initialisations.
+
+ @retval EFI_SUCCESS Success or execution context is not a Realm.
+ @retval EFI_OUT_OF_RESOURCES Out of resources.
+ @retval RETURN_INVALID_PARAMETER A parameter is invalid.
+**/
+EFI_STATUS
+EFIAPI
+ArmCcaInitialize (
+ VOID
+ )
+{
+ // Noting to do as the execution context is not a Realm.
+ return EFI_SUCCESS;
+}
diff --git a/ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.inf b/ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.inf
new file mode 100644
index 0000000000000000000000000000000000000000..f039c7abdb6d5391f792179546ff9947086fe541
--- /dev/null
+++ b/ArmVirtPkg/Library/ArmCcaInitPeiLibNull/ArmCcaInitPeiLibNull.inf
@@ -0,0 +1,27 @@
+## @file
+# Library that implements a NULL implementation of the ArmCcaInitPeiLib.
+#
+# Copyright (c) 2022 - 2023, Arm Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = ArmCcaInitPeiLib
+ FILE_GUID = 60686C60-8433-49EE-9F2C-DDC424A95652
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ArmCcaInitPeiLib
+
+[Sources]
+ ArmCcaInitPeiLibNull.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ ArmVirtPkg/ArmVirtPkg.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ BaseLib
--
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'