[edk2-devel] [RFC PATCH v1 17/30] ArmVirtPkg: CloudHv: Add a NULL implementation of ArmCcaConfigureMmio

[Sami Mujawar]

To support Arm CCA, a hook function ArmCcaConfigureMmio () has
been added to the ArmVirtMemInfoLib library.

Since, Arm CCA has not been enabled for the Cloud Hypervisor guest
firmware, update the CloudHvVirtMemInfoLib library to add a NULL
implementation for ArmCcaConfigureMmio () that returns
RETURN_UNSUPPORTED.

Signed-off-by: Sami Mujawar <sami.mujawar at arm.com>
---
 ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c | 22 +++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c b/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c
index 98cc13870599c10bfab5029de9f7730a67099b72..c47ddc4a16caf9b3755617627718789098aa2f26 100644
--- a/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c
+++ b/ArmVirtPkg/Library/CloudHvVirtMemInfoLib/CloudHvVirtMemInfoLib.c
@@ -1,6 +1,6 @@
 /** @file
 
-  Copyright (c) 2022, Arm Limited. All rights reserved.
+  Copyright (c) 2022 - 2023, Arm Limited. All rights reserved.
 
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -241,3 +241,23 @@ ArmVirtGetMemoryMap (
 
   *VirtualMemoryMap = VirtualMemoryTable;
 }
+
+/**
+  Configure the MMIO regions as shared with the VMM.
+
+  Set the protection attribute for the MMIO regions as Unprotected IPA.
+
+  @param[in]    IpaWidth  IPA width of the Realm.
+
+  @retval RETURN_SUCCESS            Success.
+  @retval RETURN_INVALID_PARAMETER  A parameter is invalid.
+  @retval RETURN_UNSUPPORTED        The execution context is not in a Realm.
+**/
+EFI_STATUS
+EFIAPI
+ArmCcaConfigureMmio (
+  IN UINT64  IpaWidth
+  )
+{
+  return RETURN_UNSUPPORTED;
+}
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'



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