[PATCH v3 2/3] OvmfPkg/QemuFlashFvbServicesRuntimeDxe: Do not expose MMIO in SMM build

[Brijesh Singh <brijesh.singh@amd.com>]

In the SMM build, only an SMM driver is using the address range hence we
do not need to expose the flash MMIO range in EFI runtime mapping.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Julien Grall <julien.grall@linaro.org>
Cc: Justen Jordan L <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
 .../FwBlockService.c                               | 50 ---------------------
 .../FwBlockService.h                               |  7 +++
 .../FwBlockServiceDxe.c                            | 51 ++++++++++++++++++++++
 .../FwBlockServiceSmm.c                            | 13 ++++++
 4 files changed, 71 insertions(+), 50 deletions(-)

diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockService.c b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockService.c
index 28499991a43c..eec8b1b1ae9d 100644
--- a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockService.c
+++ b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockService.c
@@ -831,56 +831,6 @@ ValidateFvHeader (
 
 STATIC
 EFI_STATUS
-MarkIoMemoryRangeForRuntimeAccess (
-  EFI_PHYSICAL_ADDRESS                BaseAddress,
-  UINTN                               Length
-  )
-{
-  EFI_STATUS                          Status;
-  EFI_GCD_MEMORY_SPACE_DESCRIPTOR     GcdDescriptor;
-
-  //
-  // Mark flash region as runtime memory
-  //
-  Status = gDS->RemoveMemorySpace (
-                  BaseAddress,
-                  Length
-                  );
-
-  Status = gDS->AddMemorySpace (
-                  EfiGcdMemoryTypeMemoryMappedIo,
-                  BaseAddress,
-                  Length,
-                  EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
-                  );
-  ASSERT_EFI_ERROR (Status);
-
-  Status = gDS->AllocateMemorySpace (
-                  AllocateAddress,
-                  EfiGcdMemoryTypeMemoryMappedIo,
-                  0,
-                  Length,
-                  &BaseAddress,
-                  gImageHandle,
-                  NULL
-                  );
-  ASSERT_EFI_ERROR (Status);
-
-  Status      = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);
-  ASSERT_EFI_ERROR (Status);
-
-  Status = gDS->SetMemorySpaceAttributes (
-                  BaseAddress,
-                  Length,
-                  GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME
-                  );
-  ASSERT_EFI_ERROR (Status);
-
-  return Status;
-}
-
-STATIC
-EFI_STATUS
 InitializeVariableFvHeader (
   VOID
   )
diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockService.h b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockService.h
index 1f9287b08769..178f578d49f0 100644
--- a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockService.h
+++ b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockService.h
@@ -189,4 +189,11 @@ VOID
 InstallVirtualAddressChangeHandler (
   VOID
   );
+
+EFI_STATUS
+MarkIoMemoryRangeForRuntimeAccess (
+  IN EFI_PHYSICAL_ADDRESS   BaseAddress,
+  IN UINTN                  Length
+  );
+
 #endif
diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c
index 63b308658e36..646427bf4e2c 100644
--- a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c
+++ b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceDxe.c
@@ -22,6 +22,8 @@
 #include <Library/UefiRuntimeLib.h>
 #include <Protocol/DevicePath.h>
 #include <Protocol/FirmwareVolumeBlock.h>
+#include <Library/DxeServicesTableLib.h>
+#include <Library/MemoryAllocationLib.h>
 
 #include "FwBlockService.h"
 #include "QemuFlash.h"
@@ -155,3 +157,52 @@ InstallVirtualAddressChangeHandler (
                   );
   ASSERT_EFI_ERROR (Status);
 }
+
+EFI_STATUS
+MarkIoMemoryRangeForRuntimeAccess (
+  EFI_PHYSICAL_ADDRESS                BaseAddress,
+  UINTN                               Length
+  )
+{
+  EFI_STATUS                          Status;
+  EFI_GCD_MEMORY_SPACE_DESCRIPTOR     GcdDescriptor;
+
+  //
+  // Mark flash region as runtime memory
+  //
+  Status = gDS->RemoveMemorySpace (
+                  BaseAddress,
+                  Length
+                  );
+
+  Status = gDS->AddMemorySpace (
+                  EfiGcdMemoryTypeMemoryMappedIo,
+                  BaseAddress,
+                  Length,
+                  EFI_MEMORY_UC | EFI_MEMORY_RUNTIME
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  Status = gDS->AllocateMemorySpace (
+                  AllocateAddress,
+                  EfiGcdMemoryTypeMemoryMappedIo,
+                  0,
+                  Length,
+                  &BaseAddress,
+                  gImageHandle,
+                  NULL
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  Status      = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);
+  ASSERT_EFI_ERROR (Status);
+
+  Status = gDS->SetMemorySpaceAttributes (
+                  BaseAddress,
+                  Length,
+                  GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  return Status;
+}
diff --git a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceSmm.c b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceSmm.c
index e0617f2503a2..cdb073348158 100644
--- a/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceSmm.c
+++ b/OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FwBlockServiceSmm.c
@@ -67,3 +67,16 @@ InstallVirtualAddressChangeHandler (
   // Nothing.
   //
 }
+
+EFI_STATUS
+MarkIoMemoryRangeForRuntimeAccess (
+  EFI_PHYSICAL_ADDRESS                BaseAddress,
+  UINTN                               Length
+  )
+{
+  //
+  // Nothing
+  //
+
+  return EFI_SUCCESS;
+}
-- 
2.7.4