diff --git a/arch/loongarch/include/asm/inst.h b/arch/loongarch/include/asm/inst.h
index ad120f924905..c3993fd88aba 100644
--- a/arch/loongarch/include/asm/inst.h
+++ b/arch/loongarch/include/asm/inst.h
@@ -12,6 +12,7 @@
 
 #define INSN_NOP		0x03400000
 #define INSN_BREAK		0x002a0000
+#define INSN_HVCL		0x002b8000
 
 #define ADDR_IMMMASK_LU52ID	0xFFF0000000000000
 #define ADDR_IMMMASK_LU32ID	0x000FFFFF00000000
diff --git a/arch/loongarch/include/asm/kvm_host.h b/arch/loongarch/include/asm/kvm_host.h
index 2aae1517c8bf..fc2edaefd688 100644
--- a/arch/loongarch/include/asm/kvm_host.h
+++ b/arch/loongarch/include/asm/kvm_host.h
@@ -31,6 +31,11 @@
 
 #define KVM_HALT_POLL_NS_DEFAULT	500000
 
+#define KVM_GUESTDBG_SW_BP_MASK		\
+	(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)
+#define KVM_GUESTDBG_VALID_MASK		\
+	(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP | KVM_GUESTDBG_SINGLESTEP)
+
 struct kvm_vm_stat {
 	struct kvm_vm_stat_generic generic;
 	u64 pages;
diff --git a/arch/loongarch/include/asm/kvm_para.h b/arch/loongarch/include/asm/kvm_para.h
index 012b85fcb2cb..4ba2312e5f8c 100644
--- a/arch/loongarch/include/asm/kvm_para.h
+++ b/arch/loongarch/include/asm/kvm_para.h
@@ -10,10 +10,13 @@
 #define HYPERCALL_ENCODE(vendor, code)	((vendor << HYPERVISOR_VENDOR_SHIFT) + code)
 
 #define KVM_HCALL_CODE_SERVICE		0
+#define KVM_HCALL_CODE_SWDBG		1
 
 #define KVM_HCALL_SERVICE		HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SERVICE)
 #define  KVM_HCALL_FUNC_IPI		1
 
+#define KVM_HCALL_SWDBG			HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SWDBG)
+
 /*
  * LoongArch hypercall return code
  */
diff --git a/arch/loongarch/include/uapi/asm/kvm.h b/arch/loongarch/include/uapi/asm/kvm.h
index 109785922cf9..f9abef382317 100644
--- a/arch/loongarch/include/uapi/asm/kvm.h
+++ b/arch/loongarch/include/uapi/asm/kvm.h
@@ -17,6 +17,8 @@
 #define KVM_COALESCED_MMIO_PAGE_OFFSET	1
 #define KVM_DIRTY_LOG_PAGE_OFFSET	64
 
+#define KVM_GUESTDBG_USE_SW_BP		0x00010000
+
 /*
  * for KVM_GET_REGS and KVM_SET_REGS
  */
@@ -72,6 +74,8 @@ struct kvm_fpu {
 
 #define KVM_REG_LOONGARCH_COUNTER	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 1)
 #define KVM_REG_LOONGARCH_VCPU_RESET	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 2)
+/* Debugging: Special instruction for software breakpoint */
+#define KVM_REG_LOONGARCH_DEBUG_INST	(KVM_REG_LOONGARCH_KVM | KVM_REG_SIZE_U64 | 3)
 
 #define LOONGARCH_REG_SHIFT		3
 #define LOONGARCH_REG_64(TYPE, REG)	(TYPE | KVM_REG_SIZE_U64 | (REG << LOONGARCH_REG_SHIFT))
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index 5ace3e8b4e80..43cf34f31c10 100644
--- a/arch/loongarch/kvm/exit.c
+++ b/arch/loongarch/kvm/exit.c
@@ -760,25 +760,37 @@ static void kvm_handle_service(struct kvm_vcpu *vcpu)
 
 static int kvm_handle_hypercall(struct kvm_vcpu *vcpu)
 {
+	int ret;
 	larch_inst inst;
 	unsigned int code;
 
 	inst.word = vcpu->arch.badi;
 	code = inst.reg0i15_format.immediate;
-	update_pc(&vcpu->arch);
+	ret = RESUME_GUEST;
 
 	switch (code) {
 	case KVM_HCALL_SERVICE:
 		vcpu->stat.hypercall_exits++;
 		kvm_handle_service(vcpu);
 		break;
+	case KVM_HCALL_SWDBG:
+		/* KVM_HCALL_SWDBG only in effective when SW_BP is enabled */
+		if (vcpu->guest_debug & KVM_GUESTDBG_SW_BP_MASK) {
+			vcpu->run->exit_reason = KVM_EXIT_DEBUG;
+			ret = RESUME_HOST;
+			break;
+		}
+		fallthrough;
 	default:
 		/* Treat it as noop intruction, only set return value */
 		kvm_write_reg(vcpu, LOONGARCH_GPR_A0, KVM_HCALL_INVALID_CODE);
 		break;
 	}
 
-	return RESUME_GUEST;
+	if (ret == RESUME_GUEST)
+		update_pc(&vcpu->arch);
+
+	return ret;
 }
 
 /*
diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
index 97a7aa508e96..9e8030d45129 100644
--- a/arch/loongarch/kvm/vcpu.c
+++ b/arch/loongarch/kvm/vcpu.c
@@ -248,7 +248,15 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 					struct kvm_guest_debug *dbg)
 {
-	return -EINVAL;
+	if (dbg->control & ~KVM_GUESTDBG_VALID_MASK)
+		return -EINVAL;
+
+	if (dbg->control & KVM_GUESTDBG_ENABLE)
+		vcpu->guest_debug = dbg->control;
+	else
+		vcpu->guest_debug = 0;
+
+	return 0;
 }
 
 static inline int kvm_set_cpuid(struct kvm_vcpu *vcpu, u64 val)
@@ -499,6 +507,9 @@ static int kvm_get_one_reg(struct kvm_vcpu *vcpu,
 		case KVM_REG_LOONGARCH_COUNTER:
 			*v = drdtime() + vcpu->kvm->arch.time_offset;
 			break;
+		case KVM_REG_LOONGARCH_DEBUG_INST:
+			*v = INSN_HVCL | KVM_HCALL_SWDBG;
+			break;
 		default:
 			ret = -EINVAL;
 			break;
diff --git a/arch/loongarch/kvm/vm.c b/arch/loongarch/kvm/vm.c
index 191d82309a1e..6b2e4f66ad26 100644
--- a/arch/loongarch/kvm/vm.c
+++ b/arch/loongarch/kvm/vm.c
@@ -76,6 +76,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_IMMEDIATE_EXIT:
 	case KVM_CAP_IOEVENTFD:
 	case KVM_CAP_MP_STATE:
+	case KVM_CAP_SET_GUEST_DEBUG:
 		r = 1;
 		break;
 	case KVM_CAP_NR_VCPUS: