[RFC PATCH v1 28/30] ArmVirtPkg: Enable Virtio communication for Arm CCA

["Sami Mujawar" <sami.mujawar@arm.com>]

Arm CCA Realms protect the access to memory from outside the
Realm. For Virtio to work the Realm Guest and the Host should
be able to share buffers.

Realm Aperture Management protocol (RAMP) manages the sharing
of buffers between the Realm Guest and the Host, while the
ArmCcaIoMmuDxe implements the EDKII_IOMMU_PROTOCOL which
provides the necessary hooks so that DMA accesses can be
performed by bouncing buffers using pages shared with the
host.

Therefore, enable the support for Realm Aperture Management
Protocol and ArmCcaIoMmuDxe for Kvmtool Guest firmware.

Note: The ArmCcaIoMmuDxe and RAMP check if the code is executing
in a Realm before installing the respective protocols. If the
code is not executing in a Realm the gIoMmuAbsentProtocolGuid is
installed, thereby allowing the same firmware to be used both for
normal and Realm Guest firmware.

Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
---
 ArmVirtPkg/ArmVirtKvmTool.dsc | 10 ++++++++++
 ArmVirtPkg/ArmVirtKvmTool.fdf | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/ArmVirtPkg/ArmVirtKvmTool.dsc b/ArmVirtPkg/ArmVirtKvmTool.dsc
index acf4ede48da2d33d50b5593a857f3815f427707c..d9dd7a67307ffed5da16837301f18e7715187450 100644
--- a/ArmVirtPkg/ArmVirtKvmTool.dsc
+++ b/ArmVirtPkg/ArmVirtKvmTool.dsc
@@ -411,3 +411,13 @@ [Components.AARCH64]
   ArmVirtPkg/KvmtoolCfgMgrDxe/ConfigurationManagerDxe.inf
 
   ArmVirtPkg/ArmCcaDxe/ArmCcaDxe.inf
+
+  #
+  # Realm Aperture Management
+  #
+  ArmVirtPkg/RealmApertureManagementProtocolDxe/RealmApertureManagementProtocolDxe.inf
+
+  #
+  # IoMMU support for Arm CCA
+  #
+  ArmVirtPkg/ArmCcaIoMmuDxe/ArmCcaIoMmuDxe.inf
diff --git a/ArmVirtPkg/ArmVirtKvmTool.fdf b/ArmVirtPkg/ArmVirtKvmTool.fdf
index 68bd0e9d82dc83a337d8127a598018381888d894..c04a1f1f381410d2eccb781b2de99898d5da9578 100644
--- a/ArmVirtPkg/ArmVirtKvmTool.fdf
+++ b/ArmVirtPkg/ArmVirtKvmTool.fdf
@@ -224,6 +224,16 @@ [FV.FvMain]
   !include DynamicTablesPkg/DynamicTables.fdf.inc
 
   INF ArmVirtPkg/KvmtoolCfgMgrDxe/ConfigurationManagerDxe.inf
+
+  #
+  # Realm Aperture Management
+  #
+  INF ArmVirtPkg/RealmApertureManagementProtocolDxe/RealmApertureManagementProtocolDxe.inf
+
+  #
+  # IoMMU support for Arm CCA
+  #
+  INF ArmVirtPkg/ArmCcaIoMmuDxe/ArmCcaIoMmuDxe.inf
 !endif
 
   #
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'