diff --git a/hypervisor/arch/riscv/guest/vsbi.c b/hypervisor/arch/riscv/guest/vsbi.c
index 5e12e99a9..23b211de4 100644
--- a/hypervisor/arch/riscv/guest/vsbi.c
+++ b/hypervisor/arch/riscv/guest/vsbi.c
@@ -109,4 +109,15 @@ void init_vsbi(struct acrn_vm *vm)
 			}
 		}
 	}
+	if (is_service_vm(vm)) {
+		/* pass machine IDs from SBI to SOS */
+		vm->arch_vm.mvendorid = sbi_get_mvendorid();
+		vm->arch_vm.marchid = sbi_get_marchid();
+		vm->arch_vm.mimpid = sbi_get_mimpid();
+	} else {
+		/* set dummy machine IDs for guest VMs */
+		vm->arch_vm.mvendorid = VSBI_ACRN_MVENDORID;
+		vm->arch_vm.marchid = VSBI_ACRN_MARCHID;
+		vm->arch_vm.mimpid = VSBI_ACRN_MIMPID;
+	}
 }
diff --git a/hypervisor/arch/riscv/guest/vsbi/vsbi_base.c b/hypervisor/arch/riscv/guest/vsbi/vsbi_base.c
index 10d41c8f6..92d2de339 100644
--- a/hypervisor/arch/riscv/guest/vsbi/vsbi_base.c
+++ b/hypervisor/arch/riscv/guest/vsbi/vsbi_base.c
@@ -15,20 +15,26 @@ static int32_t vcpu_sbi_base_ecall_handler(struct acrn_vcpu *vcpu, __unused uint
 			       uint64_t func_id, uint64_t *args, struct vsbi_ret *out)
 {
 	int ret = SBI_SUCCESS;
-	sbiret r;
 	const struct acrn_vsbi_extension *e;
 
 	switch (func_id) {
 	case SBI_BASE_FID_GET_SPEC_VERSION:
-	case SBI_BASE_FID_GET_IMP_VERSION:
+		out->value = VSBI_SPEC_VERSION_MAJOR << 24 | VSBI_SPEC_VERSION_MINOR;
+		break;
 	case SBI_BASE_FID_GET_IMP_ID:
+		out->value = VSBI_ACRN_IMPID;
+		break;
+	case SBI_BASE_FID_GET_IMP_VERSION:
+		out->value = VSBI_ACRN_VERSION_MAJOR << 24 | VSBI_ACRN_VERSION_MINOR;
+		break;
 	case SBI_BASE_FID_GET_MVENDORID:
+		out->value = vcpu->vm->arch_vm.mvendorid;;
+		break;
 	case SBI_BASE_FID_GET_MARCHID:
+		out->value = vcpu->vm->arch_vm.marchid;
+		break;
 	case SBI_BASE_FID_GET_MIMPID:
-		/* TODO: Dummy. For now just passthrough everything */
-		r = sbi_ecall(0, 0, 0, 0, 0, 0, func_id, SBI_EID_BASE);
-		ret = r.error;
-		out->value = r.value;
+		out->value = vcpu->vm->arch_vm.mimpid;
 		break;
 	case SBI_BASE_FID_PROBE_EXT:
 		e = vcpu_find_extension(vcpu, args[0]);
@@ -36,6 +42,7 @@ static int32_t vcpu_sbi_base_ecall_handler(struct acrn_vcpu *vcpu, __unused uint
 		break;
 	default:
 		ret = SBI_ERR_NOT_SUPPORTED;
+		break;
 	}
 
 	return ret;
diff --git a/hypervisor/include/arch/riscv/asm/guest/vm.h b/hypervisor/include/arch/riscv/asm/guest/vm.h
index 3de19a6b8..15fccc51d 100644
--- a/hypervisor/include/arch/riscv/asm/guest/vm.h
+++ b/hypervisor/include/arch/riscv/asm/guest/vm.h
@@ -21,6 +21,9 @@
 struct vm_arch {
 	const struct acrn_vsbi_extension *vsbi_exts[MAX_NUM_SUPPORTED_VSBI_EXT];
 	uint16_t n_vsbi_exts;
+	uint64_t mvendorid;
+	uint64_t marchid;
+	uint64_t mimpid;
 };
 
 struct acrn_vcpu;
diff --git a/hypervisor/include/arch/riscv/asm/guest/vsbi.h b/hypervisor/include/arch/riscv/asm/guest/vsbi.h
index 69a88829c..be84f2361 100644
--- a/hypervisor/include/arch/riscv/asm/guest/vsbi.h
+++ b/hypervisor/include/arch/riscv/asm/guest/vsbi.h
@@ -8,6 +8,18 @@
 #define RISCV_VSBI_H
 
 #include <types.h>
+#include <version.h>
+
+#define VSBI_SPEC_VERSION_MAJOR 0x2U
+#define VSBI_SPEC_VERSION_MINOR 0x0U
+#define VSBI_SPEC_VERSION (VSBI_SPEC_VERSION_MAJOR << 24 | VSBI_SPEC_VERSION_MINOR)
+#define VSBI_ACRN_VERSION_MAJOR HV_API_MAJOR_VERSION
+#define VSBI_ACRN_VERSION_MINOR HV_API_MINOR_VERSION
+#define VSBI_ACRN_VERSION (VSBI_ACRN_VERSION_MAJOR << 24 | VSBI_ACRN_VERSION_MINOR)
+#define VSBI_ACRN_IMPID 55U /* FIXME: once official ID confirmed */
+#define VSBI_ACRN_MVENDORID 0U /* dummy MVENDORID for guest VM */
+#define VSBI_ACRN_MARCHID 0U /* dummy MARCHID for guest VM */
+#define VSBI_ACRN_MIMPID 0U /* dummy MIMPID for guest VM */
 
 #define MAX_NUM_SUPPORTED_VSBI_EXT 8