vm_enter_guest)
 	/* Save host GPRs */
 	kvm_save_host_gpr a2
 
+	/*
+	 * The csr_era member variable of the pt_regs structure is required
+	 * for unwinding orc to perform stack traceback, so we need to put
+	 * pc into csr_era member variable here.
+	 */
+	pcaddi	t0, 0
+	st.d	t0, a2, PT_ERA
+
 	addi.d	a2, a1, KVM_VCPU_ARCH
 	st.d	sp, a2, KVM_ARCH_HSP
 	st.d	tp, a2, KVM_ARCH_HTP
@@ -225,7 +235,7 @@ SYM_FUNC_START(kvm_enter_guest)
 	csrwr	a1, KVM_VCPU_KS
 	kvm_switch_to_guest
 SYM_FUNC_END(kvm_enter_guest)
-EXPORT_SYMBOL(kvm_enter_guest)
+EXPORT_SYMBOL_FOR_KVM(kvm_enter_guest)
 
 SYM_FUNC_START(kvm_save_fpu)
 	fpu_save_csr	a0 t1
@@ -233,7 +243,7 @@ SYM_FUNC_START(kvm_save_fpu)
 	fpu_save_cc	a0 t1 t2
 	jr              ra
 SYM_FUNC_END(kvm_save_fpu)
-EXPORT_SYMBOL(kvm_save_fpu)
+EXPORT_SYMBOL_FOR_KVM(kvm_save_fpu)
 
 SYM_FUNC_START(kvm_restore_fpu)
 	fpu_restore_double a0 t1
@@ -241,7 +251,7 @@ SYM_FUNC_START(kvm_restore_fpu)
 	fpu_restore_cc	   a0 t1 t2
 	jr                 ra
 SYM_FUNC_END(kvm_restore_fpu)
-EXPORT_SYMBOL(kvm_restore_fpu)
+EXPORT_SYMBOL_FOR_KVM(kvm_restore_fpu)
 
 #ifdef CONFIG_CPU_HAS_LSX
 SYM_FUNC_START(kvm_save_lsx)
@@ -250,7 +260,7 @@ SYM_FUNC_START(kvm_save_lsx)
 	lsx_save_data   a0 t1
 	jr              ra
 SYM_FUNC_END(kvm_save_lsx)
-EXPORT_SYMBOL(kvm_save_lsx)
+EXPORT_SYMBOL_FOR_KVM(kvm_save_lsx)
 
 SYM_FUNC_START(kvm_restore_lsx)
 	lsx_restore_data a0 t1
@@ -258,7 +268,7 @@ SYM_FUNC_START(kvm_restore_lsx)
 	fpu_restore_csr  a0 t1 t2
 	jr               ra
 SYM_FUNC_END(kvm_restore_lsx)
-EXPORT_SYMBOL(kvm_restore_lsx)
+EXPORT_SYMBOL_FOR_KVM(kvm_restore_lsx)
 #endif
 
 #ifdef CONFIG_CPU_HAS_LASX
@@ -268,7 +278,7 @@ SYM_FUNC_START(kvm_save_lasx)
 	lasx_save_data  a0 t1
 	jr              ra
 SYM_FUNC_END(kvm_save_lasx)
-EXPORT_SYMBOL(kvm_save_lasx)
+EXPORT_SYMBOL_FOR_KVM(kvm_save_lasx)
 
 SYM_FUNC_START(kvm_restore_lasx)
 	lasx_restore_data a0 t1
@@ -276,7 +286,7 @@ SYM_FUNC_START(kvm_restore_lasx)
 	fpu_restore_csr   a0 t1 t2
 	jr                ra
 SYM_FUNC_END(kvm_restore_lasx)
-EXPORT_SYMBOL(kvm_restore_lasx)
+EXPORT_SYMBOL_FOR_KVM(kvm_restore_lasx)
 #endif
 
 #ifdef CONFIG_CPU_HAS_LBT
-- 
2.39.1[PATCH V3 2/2] LoongArch: KVM: fix "unreliable stack" issueXianglai Li <lixianglai@loongson.cn> undefinedloongarch@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, lixianglai@loongson.cn undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefinedÇ