diff --git a/CMakeLists.txt b/CMakeLists.txt
index c50cb913..b7e329cd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,6 +64,19 @@ if(ENABLE_TOFU)
 	set(KBUILD_C_FLAGS "${KBUILD_C_FLAGS} -DENABLE_TOFU")
 endif()
 
+execute_process(COMMAND bash -c "grep $(hostname) /etc/opt/FJSVfefs/config/fefs_node1.csv 2>/dev/null | cut -d, -f2"
+  OUTPUT_VARIABLE FUGAKU_NODE_TYPE OUTPUT_STRIP_TRAILING_WHITESPACE)
+if(FUGAKU_NODE_TYPE STREQUAL "CN")
+	option(ENABLE_FUGAKU_HACKS "Fugaku hacks" ON)
+else()
+	option(ENABLE_FUGAKU_HACKS "Fugaku hacks" OFF)
+endif()
+
+if(ENABLE_FUGAKU_HACKS)
+	add_definitions(-DENABLE_FUGAKU_HACKS)
+	set(KBUILD_C_FLAGS "${KBUILD_C_FLAGS} -DENABLE_FUGAKU_HACKS")
+endif()
+
 option(ENABLE_LINUX_WORK_IRQ_FOR_IKC "Use Linux work IRQ for IKC IPI" ON)
 if (ENABLE_LINUX_WORK_IRQ_FOR_IKC)
 	set(KBUILD_C_FLAGS "${KBUILD_C_FLAGS} -DIHK_IKC_USE_LINUX_WORK_IRQ")
@@ -267,6 +280,7 @@ message("MAP_KERNEL_START: ${MAP_KERNEL_START}")
 message("ENABLE_MEMDUMP: ${ENABLE_MEMDUMP}")
 message("ENABLE_PERF: ${ENABLE_PERF}")
 message("ENABLE_TOFU: ${ENABLE_TOFU}")
+message("ENABLE_FUGAKU_HACKS: ${ENABLE_FUGAKU_HACKS}")
 message("ENABLE_RUSAGE: ${ENABLE_RUSAGE}")
 message("ENABLE_QLMPI: ${ENABLE_QLMPI}")
 message("ENABLE_UTI: ${ENABLE_UTI}")
diff --git a/ihk b/ihk
index 30e8b79b..156bda8e 160000
--- a/ihk
+++ b/ihk
@@ -1 +1 @@
-Subproject commit 30e8b79b7c0877dee6415327bab9a16b29932cde
+Subproject commit 156bda8e6bb50146d8164c336eb931e09d3144be