diff --git a/arch/loongarch/include/asm/shmparam.h b/arch/loongarch/include/asm/shmparam.h
deleted file mode 100644
index c9554f48d2dfab400add2d2c4e30ff6e44f1db14..0000000000000000000000000000000000000000
--- a/arch/loongarch/include/asm/shmparam.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
- */
-#ifndef _ASM_SHMPARAM_H
-#define _ASM_SHMPARAM_H
-
-#define __ARCH_FORCE_SHMLBA	1
-
-#define	SHMLBA	SZ_64K		 /* attach addr a multiple of this */
-
-#endif /* _ASM_SHMPARAM_H */
diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S
index 841e51144945a6fcf55efebcb68b3b4171a8b4d5..506a99a5bbc74f412084f7ea2ce275f72651c7c1 100644
--- a/arch/loongarch/kernel/head.S
+++ b/arch/loongarch/kernel/head.S
@@ -70,6 +70,11 @@ SYM_CODE_START(kernel_entry)			# kernel entry point
 	la.pcrel	t0, fw_arg2
 	st.d		a2, t0, 0
 
+#ifdef CONFIG_PAGE_SIZE_4KB
+	li.d		t0, 0
+	li.d		t1, CSR_STFILL
+	csrxchg		t0, t1, LOONGARCH_CSR_IMPCTL1
+#endif
 	/* KSave3 used for percpu base, initialized as 0 */
 	csrwr		zero, PERCPU_BASE_KS
 	/* GPR21 used for percpu base (runtime), initialized as 0 */
@@ -119,6 +124,11 @@ SYM_CODE_START(smpboot_entry)
 	SETUP_DMWINS	t0
 	JUMP_VIRT_ADDR	t0, t1
 
+#ifdef CONFIG_PAGE_SIZE_4KB
+	li.d		t0, 0
+	li.d		t1, CSR_STFILL
+	csrxchg		t0, t1, LOONGARCH_CSR_IMPCTL1
+#endif
 	/* Enable PG */
 	li.w		t0, 0xb0		# PLV=0, IE=0, PG=1
 	csrwr		t0, LOONGARCH_CSR_CRMD