diff --git a/tools/power/x86/intel-speed-select/isst-core-mbox.c b/tools/power/x86/intel-speed-select/isst-core-mbox.c
index e6d32786a6ad..bf873dfe72e6 100644
--- a/tools/power/x86/intel-speed-select/isst-core-mbox.c
+++ b/tools/power/x86/intel-speed-select/isst-core-mbox.c
@@ -390,6 +390,97 @@ static int mbox_set_pbf_fact_status(struct isst_id *id, int pbf, int enable)
 	return 0;
 }
 
+static int _get_fact_bucket_info(struct isst_id *id, int level,
+			      struct isst_fact_bucket_info *bucket_info)
+{
+	unsigned int resp;
+	int i, k, ret;
+
+	for (i = 0; i < 2; ++i) {
+		int j;
+
+		ret = isst_send_mbox_command(
+			id->cpu, CONFIG_TDP,
+			CONFIG_TDP_GET_FACT_HP_TURBO_LIMIT_NUMCORES, 0,
+			(i << 8) | level, &resp);
+		if (ret)
+			return ret;
+
+		debug_printf(
+			"cpu:%d CONFIG_TDP_GET_FACT_HP_TURBO_LIMIT_NUMCORES index:%d level:%d resp:%x\n",
+			id->cpu, i, level, resp);
+
+		for (j = 0; j < 4; ++j) {
+			bucket_info[j + (i * 4)].hp_cores =
+				(resp >> (j * 8)) & 0xff;
+		}
+	}
+
+	for (k = 0; k < 3; ++k) {
+		for (i = 0; i < 2; ++i) {
+			int j;
+
+			ret = isst_send_mbox_command(
+				id->cpu, CONFIG_TDP,
+				CONFIG_TDP_GET_FACT_HP_TURBO_LIMIT_RATIOS, 0,
+				(k << 16) | (i << 8) | level, &resp);
+			if (ret)
+				return ret;
+
+			debug_printf(
+				"cpu:%d CONFIG_TDP_GET_FACT_HP_TURBO_LIMIT_RATIOS index:%d level:%d avx:%d resp:%x\n",
+				id->cpu, i, level, k, resp);
+
+			for (j = 0; j < 4; ++j) {
+				bucket_info[j + (i * 4)].hp_ratios[k] =
+					(resp >> (j * 8)) & 0xff;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static int mbox_get_fact_info(struct isst_id *id, int level, int fact_bucket, struct isst_fact_info *fact_info)
+{
+	unsigned int resp;
+	int j, ret, print;
+
+	ret = isst_send_mbox_command(id->cpu, CONFIG_TDP,
+				     CONFIG_TDP_GET_FACT_LP_CLIPPING_RATIO, 0,
+				     level, &resp);
+	if (ret)
+		return ret;
+
+	debug_printf("cpu:%d CONFIG_TDP_GET_FACT_LP_CLIPPING_RATIO resp:%x\n",
+		     id->cpu, resp);
+
+	fact_info->lp_ratios[0] = resp & 0xff;
+	fact_info->lp_ratios[1] = (resp >> 8) & 0xff;
+	fact_info->lp_ratios[2] = (resp >> 16) & 0xff;
+
+	ret = _get_fact_bucket_info(id, level, fact_info->bucket_info);
+	if (ret)
+		return ret;
+
+	print = 0;
+	for (j = 0; j < ISST_FACT_MAX_BUCKETS; ++j) {
+		if (fact_bucket != 0xff && fact_bucket != j)
+			continue;
+
+		if (!fact_info->bucket_info[j].hp_cores)
+			break;
+
+		print = 1;
+	}
+	if (!print) {
+		isst_display_error_info_message(1, "Invalid bucket", 0, 0);
+		return -1;
+	}
+
+	return 0;
+}
+
 static struct isst_platform_ops mbox_ops = {
 	.get_disp_freq_multiplier = mbox_get_disp_freq_multiplier,
 	.get_trl_max_levels = mbox_get_trl_max_levels,
@@ -405,6 +496,7 @@ static struct isst_platform_ops mbox_ops = {
 	.set_tdp_level = mbox_set_tdp_level,
 	.get_pbf_info = mbox_get_pbf_info,
 	.set_pbf_fact_status = mbox_set_pbf_fact_status,
+	.get_fact_info = mbox_get_fact_info,
 };
 
 struct isst_platform_ops *mbox_get_platform_ops(void)
diff --git a/tools/power/x86/intel-speed-select/isst-core.c b/tools/power/x86/intel-speed-select/isst-core.c
index 3765a1eefcc5..e42469363803 100644
--- a/tools/power/x86/intel-speed-select/isst-core.c
+++ b/tools/power/x86/intel-speed-select/isst-core.c
@@ -396,63 +396,13 @@ int isst_set_pbf_fact_status(struct isst_id *id, int pbf, int enable)
 	return isst_ops->set_pbf_fact_status(id, pbf, enable);
 }
 
-int isst_get_fact_bucket_info(struct isst_id *id, int level,
-			      struct isst_fact_bucket_info *bucket_info)
-{
-	unsigned int resp;
-	int i, k, ret;
 
-	for (i = 0; i < 2; ++i) {
-		int j;
-
-		ret = isst_send_mbox_command(
-			id->cpu, CONFIG_TDP,
-			CONFIG_TDP_GET_FACT_HP_TURBO_LIMIT_NUMCORES, 0,
-			(i << 8) | level, &resp);
-		if (ret)
-			return ret;
-
-		debug_printf(
-			"cpu:%d CONFIG_TDP_GET_FACT_HP_TURBO_LIMIT_NUMCORES index:%d level:%d resp:%x\n",
-			id->cpu, i, level, resp);
-
-		for (j = 0; j < 4; ++j) {
-			bucket_info[j + (i * 4)].hp_cores =
-				(resp >> (j * 8)) & 0xff;
-		}
-	}
-
-	for (k = 0; k < 3; ++k) {
-		for (i = 0; i < 2; ++i) {
-			int j;
-
-			ret = isst_send_mbox_command(
-				id->cpu, CONFIG_TDP,
-				CONFIG_TDP_GET_FACT_HP_TURBO_LIMIT_RATIOS, 0,
-				(k << 16) | (i << 8) | level, &resp);
-			if (ret)
-				return ret;
-
-			debug_printf(
-				"cpu:%d CONFIG_TDP_GET_FACT_HP_TURBO_LIMIT_RATIOS index:%d level:%d avx:%d resp:%x\n",
-				id->cpu, i, level, k, resp);
-
-			for (j = 0; j < 4; ++j) {
-				bucket_info[j + (i * 4)].hp_ratios[k] =
-					(resp >> (j * 8)) & 0xff;
-			}
-		}
-	}
-
-	return 0;
-}
 
 int isst_get_fact_info(struct isst_id *id, int level, int fact_bucket, struct isst_fact_info *fact_info)
 {
 	struct isst_pkg_ctdp_level_info ctdp_level;
 	struct isst_pkg_ctdp pkg_dev;
-	unsigned int resp;
-	int j, ret, print;
+	int ret;
 
 	ret = isst_get_ctdp_levels(id, &pkg_dev);
 	if (ret) {
@@ -473,40 +423,8 @@ int isst_get_fact_info(struct isst_id *id, int level, int fact_bucket, struct is
 		isst_display_error_info_message(1, "turbo-freq feature is not present at this level", 1, level);
 		return -1;
 	}
-
-	ret = isst_send_mbox_command(id->cpu, CONFIG_TDP,
-				     CONFIG_TDP_GET_FACT_LP_CLIPPING_RATIO, 0,
-				     level, &resp);
-	if (ret)
-		return ret;
-
-	debug_printf("cpu:%d CONFIG_TDP_GET_FACT_LP_CLIPPING_RATIO resp:%x\n",
-		     id->cpu, resp);
-
-	fact_info->lp_ratios[0] = resp & 0xff;
-	fact_info->lp_ratios[1] = (resp >> 8) & 0xff;
-	fact_info->lp_ratios[2] = (resp >> 16) & 0xff;
-
-	ret = isst_get_fact_bucket_info(id, level, fact_info->bucket_info);
-	if (ret)
-		return ret;
-
-	print = 0;
-	for (j = 0; j < ISST_FACT_MAX_BUCKETS; ++j) {
-		if (fact_bucket != 0xff && fact_bucket != j)
-			continue;
-
-		if (!fact_info->bucket_info[j].hp_cores)
-			break;
-
-		print = 1;
-	}
-	if (!print) {
-		isst_display_error_info_message(1, "Invalid bucket", 0, 0);
-		return -1;
-	}
-
-	return 0;
+	CHECK_CB(get_fact_info);
+	return isst_ops->get_fact_info(id, level, fact_bucket, fact_info);
 }
 
 int isst_get_trl(struct isst_id *id, unsigned long long *trl)
diff --git a/tools/power/x86/intel-speed-select/isst.h b/tools/power/x86/intel-speed-select/isst.h
index e8251a1c34ca..4fd901ef2437 100644
--- a/tools/power/x86/intel-speed-select/isst.h
+++ b/tools/power/x86/intel-speed-select/isst.h
@@ -196,6 +196,7 @@ struct isst_platform_ops {
 	int (*set_tdp_level)(struct isst_id *id, int tdp_level);
 	int (*get_pbf_info)(struct isst_id *id, int level, struct isst_pbf_info *pbf_info);
 	int (*set_pbf_fact_status)(struct isst_id *id, int pbf, int enable);
+	int (*get_fact_info)(struct isst_id *id, int level, int fact_bucket, struct isst_fact_info *fact_info);
 };
 
 extern int is_cpu_in_power_domain(int cpu, struct isst_id *id);
@@ -256,8 +257,6 @@ extern int isst_get_pbf_info(struct isst_id *id, int level,
 			     struct isst_pbf_info *pbf_info);
 extern int isst_get_fact_info(struct isst_id *id, int level, int fact_bucket,
 			      struct isst_fact_info *fact_info);
-extern int isst_get_fact_bucket_info(struct isst_id *id, int level,
-				     struct isst_fact_bucket_info *bucket_info);
 extern void isst_fact_display_information(struct isst_id *id, FILE *outf, int level,
 					  int fact_bucket, int fact_avx,
 					  struct isst_fact_info *fact_info);