[edk2-devel] [PATCH v2 24/45] ArmVirtPkg: Perform Arm CCA initialisation in the Pei phase

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

Add ArmCcaInitialize () to perform Arm CCA specific initialisation
like:
 - Reading the Realm Config by calling the RSI interface.
 - Storing the IPA width of the Realm in PcdArmCcaEarlyIpaWidth.
 - Configuring the MMIO regions to update the page tables to set
   the protection attribute as Unprotected IPA.

Note: ArmCcaInitialize () is implemented in ArmCcaInitPeiLib for
which a Null implementation is provided. Therefore, this change
should not break existing platforms that do not implement the
Arm CCA.

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
---
 ArmVirtPkg/PrePi/PrePi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/ArmVirtPkg/PrePi/PrePi.c b/ArmVirtPkg/PrePi/PrePi.c
index f27e0ad3d223820f60d1f8087325a96c60ebe876..405da60177f56238a79687ff8e1839207b14afd3 100755
--- a/ArmVirtPkg/PrePi/PrePi.c
+++ b/ArmVirtPkg/PrePi/PrePi.c
@@ -9,6 +9,7 @@
 #include <PiPei.h>
 #include <Pi/PiBootMode.h>
 
+#include <Library/ArmCcaInitPeiLib.h>
 #include <Library/PeCoffLib.h>
 #include <Library/PrePiLib.h>
 #include <Library/PrintLib.h>
@@ -34,6 +35,7 @@ PrePiMain (
   CHAR8                       Buffer[100];
   UINTN                       CharCount;
   UINTN                       StacksSize;
+  RETURN_STATUS               RetStatus;
 
   // Initialize the architecture specific bits
   ArchInitialize ();
@@ -61,6 +63,12 @@ PrePiMain (
   Status = MemoryPeim (UefiMemoryBase, FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
   ASSERT_EFI_ERROR (Status);
 
+  // Perform the Arm CCA specific initialisations.
+  RetStatus = ArmCcaInitialize ();
+  if (RETURN_ERROR (RetStatus)) {
+    CpuDeadLoop ();
+  }
+
   // Initialize the Serial Port
   SerialPortInitialize ();
   CharCount = AsciiSPrint (
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'



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