diff --git a/procedures/phal/set_SPI_mux.cpp b/procedures/phal/set_SPI_mux.cpp
new file mode 100644
index 0000000..4d40a7d
--- /dev/null
+++ b/procedures/phal/set_SPI_mux.cpp
@@ -0,0 +1,48 @@
+/**
+ * Copyright (C) 2020 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "cfam_access.hpp"
+#include "p10_cfam.hpp"
+#include "registration.hpp"
+#include "targeting.hpp"
+
+namespace openpower
+{
+namespace p10
+{
+
+using namespace openpower::cfam::access;
+using namespace openpower::cfam::p10;
+using namespace openpower::targeting;
+
+/**
+ * Sets the mux on the P10 to the FSI SPI masters rather than the PIB SPI
+ * masters. This should only be executed before the host is powering on since
+ * the host will set the mux to the PIB SPI masters.
+ */
+void setSPIMux()
+{
+    Targeting targets;
+
+    for (const auto& t : targets)
+    {
+        writeReg(t, P10_ROOT_CTRL8, 0xFFFFFFFF);
+    }
+}
+
+REGISTER_PROCEDURE("setSPIMux", setSPIMux);
+
+} // namespace p10
+} // namespace openpower