IoMmuDxe.c

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#include "CcIoMmu.h"
 
EFI_STATUS
EFIAPI
IoMmuDxeEntryPoint (
  IN EFI_HANDLE        ImageHandle,
  IN EFI_SYSTEM_TABLE  *SystemTable
  )
{
  EFI_STATUS  Status;
  EFI_HANDLE  Handle;
 
  //
  // When SEV or TDX is enabled, install IoMmu protocol otherwise install the
  // placeholder protocol so that other dependent module can run.
  //
  if (MemEncryptSevIsEnabled () || MemEncryptTdxIsEnabled ()) {
    Status = InstallIoMmuProtocol ();
  } else {
    Handle = NULL;
 
    Status = gBS->InstallMultipleProtocolInterfaces (
                    &Handle,
                    &gIoMmuAbsentProtocolGuid,
                    NULL,
                    NULL
                    );
  }
 
  return Status;
}