diff --git a/drivers/event/cnxk/cn10k_eventdev.c b/drivers/event/cnxk/cn10k_eventdev.c
index 37a7c8a8e..8d6b1e48a 100644
--- a/drivers/event/cnxk/cn10k_eventdev.c
+++ b/drivers/event/cnxk/cn10k_eventdev.c
@@ -112,6 +112,117 @@ cn10k_sso_hws_release(void *arg, void *hws)
 	memset(ws, 0, sizeof(*ws));
 }
 
+static void
+cn10k_sso_hws_flush_events(void *hws, uint8_t queue_id, uintptr_t base,
+			   cnxk_handle_event_t fn, void *arg)
+{
+	struct cn10k_sso_hws *ws = hws;
+	uint64_t cq_ds_cnt = 1;
+	uint64_t aq_cnt = 1;
+	uint64_t ds_cnt = 1;
+	struct rte_event ev;
+	uint64_t val, req;
+
+	plt_write64(0, base + SSO_LF_GGRP_QCTL);
+
+	req = queue_id;	    /* GGRP ID */
+	req |= BIT_ULL(18); /* Grouped */
+	req |= BIT_ULL(16); /* WAIT */
+
+	aq_cnt = plt_read64(base + SSO_LF_GGRP_AQ_CNT);
+	ds_cnt = plt_read64(base + SSO_LF_GGRP_MISC_CNT);
+	cq_ds_cnt = plt_read64(base + SSO_LF_GGRP_INT_CNT);
+	cq_ds_cnt &= 0x3FFF3FFF0000;
+
+	while (aq_cnt || cq_ds_cnt || ds_cnt) {
+		plt_write64(req, ws->getwrk_op);
+		cn10k_sso_hws_get_work_empty(ws, &ev);
+		if (fn != NULL && ev.u64 != 0)
+			fn(arg, ev);
+		if (ev.sched_type != SSO_TT_EMPTY)
+			cnxk_sso_hws_swtag_flush(ws->tag_wqe_op,
+						 ws->swtag_flush_op);
+		do {
+			val = plt_read64(ws->base + SSOW_LF_GWS_PENDSTATE);
+		} while (val & BIT_ULL(56));
+		aq_cnt = plt_read64(base + SSO_LF_GGRP_AQ_CNT);
+		ds_cnt = plt_read64(base + SSO_LF_GGRP_MISC_CNT);
+		cq_ds_cnt = plt_read64(base + SSO_LF_GGRP_INT_CNT);
+		/* Extract cq and ds count */
+		cq_ds_cnt &= 0x3FFF3FFF0000;
+	}
+
+	plt_write64(0, ws->base + SSOW_LF_GWS_OP_GWC_INVAL);
+	rte_mb();
+}
+
+static void
+cn10k_sso_hws_reset(void *arg, void *hws)
+{
+	struct cnxk_sso_evdev *dev = arg;
+	struct cn10k_sso_hws *ws = hws;
+	uintptr_t base = ws->base;
+	uint64_t pend_state;
+	union {
+		__uint128_t wdata;
+		uint64_t u64[2];
+	} gw;
+	uint8_t pend_tt;
+
+	/* Wait till getwork/swtp/waitw/desched completes. */
+	do {
+		pend_state = plt_read64(base + SSOW_LF_GWS_PENDSTATE);
+	} while (pend_state & (BIT_ULL(63) | BIT_ULL(62) | BIT_ULL(58) |
+			       BIT_ULL(56) | BIT_ULL(54)));
+	pend_tt = CNXK_TT_FROM_TAG(plt_read64(base + SSOW_LF_GWS_WQE0));
+	if (pend_tt != SSO_TT_EMPTY) { /* Work was pending */
+		if (pend_tt == SSO_TT_ATOMIC || pend_tt == SSO_TT_ORDERED)
+			cnxk_sso_hws_swtag_untag(base +
+						 SSOW_LF_GWS_OP_SWTAG_UNTAG);
+		plt_write64(0, base + SSOW_LF_GWS_OP_DESCHED);
+	}
+
+	/* Wait for desched to complete. */
+	do {
+		pend_state = plt_read64(base + SSOW_LF_GWS_PENDSTATE);
+	} while (pend_state & BIT_ULL(58));
+
+	switch (dev->gw_mode) {
+	case CN10K_GW_MODE_PREF:
+		while (plt_read64(base + SSOW_LF_GWS_PRF_WQE0) & BIT_ULL(63))
+			;
+		break;
+	case CN10K_GW_MODE_PREF_WFE:
+		while (plt_read64(base + SSOW_LF_GWS_PRF_WQE0) &
+		       SSOW_LF_GWS_TAG_PEND_GET_WORK_BIT)
+			continue;
+		plt_write64(0, base + SSOW_LF_GWS_OP_GWC_INVAL);
+		break;
+	case CN10K_GW_MODE_NONE:
+	default:
+		break;
+	}
+
+	if (CNXK_TT_FROM_TAG(plt_read64(base + SSOW_LF_GWS_PRF_WQE0)) !=
+	    SSO_TT_EMPTY) {
+		plt_write64(BIT_ULL(16) | 1, ws->getwrk_op);
+		do {
+			roc_load_pair(gw.u64[0], gw.u64[1], ws->tag_wqe_op);
+		} while (gw.u64[0] & BIT_ULL(63));
+		pend_tt = CNXK_TT_FROM_TAG(plt_read64(base + SSOW_LF_GWS_WQE0));
+		if (pend_tt != SSO_TT_EMPTY) { /* Work was pending */
+			if (pend_tt == SSO_TT_ATOMIC ||
+			    pend_tt == SSO_TT_ORDERED)
+				cnxk_sso_hws_swtag_untag(
+					base + SSOW_LF_GWS_OP_SWTAG_UNTAG);
+			plt_write64(0, base + SSOW_LF_GWS_OP_DESCHED);
+		}
+	}
+
+	plt_write64(0, base + SSOW_LF_GWS_OP_GWC_INVAL);
+	rte_mb();
+}
+
 static void
 cn10k_sso_set_rsrc(void *arg)
 {
@@ -263,6 +374,20 @@ cn10k_sso_port_unlink(struct rte_eventdev *event_dev, void *port,
 	return (int)nb_unlinks;
 }
 
+static int
+cn10k_sso_start(struct rte_eventdev *event_dev)
+{
+	int rc;
+
+	rc = cnxk_sso_start(event_dev, cn10k_sso_hws_reset,
+			    cn10k_sso_hws_flush_events);
+	if (rc < 0)
+		return rc;
+	cn10k_sso_fp_fns_set(event_dev);
+
+	return rc;
+}
+
 static struct rte_eventdev_ops cn10k_sso_dev_ops = {
 	.dev_infos_get = cn10k_sso_info_get,
 	.dev_configure = cn10k_sso_dev_configure,
@@ -275,6 +400,8 @@ static struct rte_eventdev_ops cn10k_sso_dev_ops = {
 	.port_link = cn10k_sso_port_link,
 	.port_unlink = cn10k_sso_port_unlink,
 	.timeout_ticks = cnxk_sso_timeout_ticks,
+
+	.dev_start = cn10k_sso_start,
 };
 
 static int
diff --git a/drivers/event/cnxk/cn9k_eventdev.c b/drivers/event/cnxk/cn9k_eventdev.c
index 6ba3d1466..20919e3a0 100644
--- a/drivers/event/cnxk/cn9k_eventdev.c
+++ b/drivers/event/cnxk/cn9k_eventdev.c
@@ -126,6 +126,102 @@ cn9k_sso_hws_release(void *arg, void *hws)
 	}
 }
 
+static void
+cn9k_sso_hws_flush_events(void *hws, uint8_t queue_id, uintptr_t base,
+			  cnxk_handle_event_t fn, void *arg)
+{
+	struct cnxk_sso_evdev *dev = cnxk_sso_pmd_priv(arg);
+	struct cn9k_sso_hws_dual *dws;
+	struct cn9k_sso_hws_state *st;
+	struct cn9k_sso_hws *ws;
+	uint64_t cq_ds_cnt = 1;
+	uint64_t aq_cnt = 1;
+	uint64_t ds_cnt = 1;
+	struct rte_event ev;
+	uintptr_t ws_base;
+	uint64_t val, req;
+
+	plt_write64(0, base + SSO_LF_GGRP_QCTL);
+
+	req = queue_id;	    /* GGRP ID */
+	req |= BIT_ULL(18); /* Grouped */
+	req |= BIT_ULL(16); /* WAIT */
+
+	aq_cnt = plt_read64(base + SSO_LF_GGRP_AQ_CNT);
+	ds_cnt = plt_read64(base + SSO_LF_GGRP_MISC_CNT);
+	cq_ds_cnt = plt_read64(base + SSO_LF_GGRP_INT_CNT);
+	cq_ds_cnt &= 0x3FFF3FFF0000;
+
+	if (dev->dual_ws) {
+		dws = hws;
+		st = &dws->ws_state[0];
+		ws_base = dws->base[0];
+	} else {
+		ws = hws;
+		st = (struct cn9k_sso_hws_state *)ws;
+		ws_base = ws->base;
+	}
+
+	while (aq_cnt || cq_ds_cnt || ds_cnt) {
+		plt_write64(req, st->getwrk_op);
+		cn9k_sso_hws_get_work_empty(st, &ev);
+		if (fn != NULL && ev.u64 != 0)
+			fn(arg, ev);
+		if (ev.sched_type != SSO_TT_EMPTY)
+			cnxk_sso_hws_swtag_flush(st->tag_op,
+						 st->swtag_flush_op);
+		do {
+			val = plt_read64(ws_base + SSOW_LF_GWS_PENDSTATE);
+		} while (val & BIT_ULL(56));
+		aq_cnt = plt_read64(base + SSO_LF_GGRP_AQ_CNT);
+		ds_cnt = plt_read64(base + SSO_LF_GGRP_MISC_CNT);
+		cq_ds_cnt = plt_read64(base + SSO_LF_GGRP_INT_CNT);
+		/* Extract cq and ds count */
+		cq_ds_cnt &= 0x3FFF3FFF0000;
+	}
+
+	plt_write64(0, ws_base + SSOW_LF_GWS_OP_GWC_INVAL);
+}
+
+static void
+cn9k_sso_hws_reset(void *arg, void *hws)
+{
+	struct cnxk_sso_evdev *dev = arg;
+	struct cn9k_sso_hws_dual *dws;
+	struct cn9k_sso_hws *ws;
+	uint64_t pend_state;
+	uint8_t pend_tt;
+	uintptr_t base;
+	uint64_t tag;
+	uint8_t i;
+
+	dws = hws;
+	ws = hws;
+	for (i = 0; i < (dev->dual_ws ? CN9K_DUAL_WS_NB_WS : 1); i++) {
+		base = dev->dual_ws ? dws->base[i] : ws->base;
+		/* Wait till getwork/swtp/waitw/desched completes. */
+		do {
+			pend_state = plt_read64(base + SSOW_LF_GWS_PENDSTATE);
+		} while (pend_state & (BIT_ULL(63) | BIT_ULL(62) | BIT_ULL(58) |
+				       BIT_ULL(56)));
+
+		tag = plt_read64(base + SSOW_LF_GWS_TAG);
+		pend_tt = (tag >> 32) & 0x3;
+		if (pend_tt != SSO_TT_EMPTY) { /* Work was pending */
+			if (pend_tt == SSO_TT_ATOMIC ||
+			    pend_tt == SSO_TT_ORDERED)
+				cnxk_sso_hws_swtag_untag(
+					base + SSOW_LF_GWS_OP_SWTAG_UNTAG);
+			plt_write64(0, base + SSOW_LF_GWS_OP_DESCHED);
+		}
+
+		/* Wait for desched to complete. */
+		do {
+			pend_state = plt_read64(base + SSOW_LF_GWS_PENDSTATE);
+		} while (pend_state & BIT_ULL(58));
+	}
+}
+
 static void
 cn9k_sso_set_rsrc(void *arg)
 {
@@ -352,6 +448,21 @@ cn9k_sso_port_unlink(struct rte_eventdev *event_dev, void *port,
 	return (int)nb_unlinks;
 }
 
+static int
+cn9k_sso_start(struct rte_eventdev *event_dev)
+{
+	int rc;
+
+	rc = cnxk_sso_start(event_dev, cn9k_sso_hws_reset,
+			    cn9k_sso_hws_flush_events);
+	if (rc < 0)
+		return rc;
+
+	cn9k_sso_fp_fns_set(event_dev);
+
+	return rc;
+}
+
 static struct rte_eventdev_ops cn9k_sso_dev_ops = {
 	.dev_infos_get = cn9k_sso_info_get,
 	.dev_configure = cn9k_sso_dev_configure,
@@ -364,6 +475,8 @@ static struct rte_eventdev_ops cn9k_sso_dev_ops = {
 	.port_link = cn9k_sso_port_link,
 	.port_unlink = cn9k_sso_port_unlink,
 	.timeout_ticks = cnxk_sso_timeout_ticks,
+
+	.dev_start = cn9k_sso_start,
 };
 
 static int
diff --git a/drivers/event/cnxk/cnxk_eventdev.c b/drivers/event/cnxk/cnxk_eventdev.c
index 2a387ff95..5feae5288 100644
--- a/drivers/event/cnxk/cnxk_eventdev.c
+++ b/drivers/event/cnxk/cnxk_eventdev.c
@@ -326,6 +326,70 @@ cnxk_sso_timeout_ticks(struct rte_eventdev *event_dev, uint64_t ns,
 	return 0;
 }
 
+static void
+cnxk_handle_event(void *arg, struct rte_event event)
+{
+	struct rte_eventdev *event_dev = arg;
+
+	if (event_dev->dev_ops->dev_stop_flush != NULL)
+		event_dev->dev_ops->dev_stop_flush(
+			event_dev->data->dev_id, event,
+			event_dev->data->dev_stop_flush_arg);
+}
+
+static void
+cnxk_sso_cleanup(struct rte_eventdev *event_dev, cnxk_sso_hws_reset_t reset_fn,
+		 cnxk_sso_hws_flush_t flush_fn, uint8_t enable)
+{
+	struct cnxk_sso_evdev *dev = cnxk_sso_pmd_priv(event_dev);
+	uintptr_t hwgrp_base;
+	uint16_t i;
+	void *ws;
+
+	for (i = 0; i < dev->nb_event_ports; i++) {
+		ws = event_dev->data->ports[i];
+		reset_fn(dev, ws);
+	}
+
+	rte_mb();
+	ws = event_dev->data->ports[0];
+
+	for (i = 0; i < dev->nb_event_queues; i++) {
+		/* Consume all the events through HWS0 */
+		hwgrp_base = roc_sso_hwgrp_base_get(&dev->sso, i);
+		flush_fn(ws, i, hwgrp_base, cnxk_handle_event, event_dev);
+		/* Enable/Disable SSO GGRP */
+		plt_write64(enable, hwgrp_base + SSO_LF_GGRP_QCTL);
+	}
+}
+
+int
+cnxk_sso_start(struct rte_eventdev *event_dev, cnxk_sso_hws_reset_t reset_fn,
+	       cnxk_sso_hws_flush_t flush_fn)
+{
+	struct cnxk_sso_evdev *dev = cnxk_sso_pmd_priv(event_dev);
+	struct roc_sso_hwgrp_qos qos[dev->qos_queue_cnt];
+	int i, rc;
+
+	plt_sso_dbg();
+	for (i = 0; i < dev->qos_queue_cnt; i++) {
+		qos->hwgrp = dev->qos_parse_data[i].queue;
+		qos->iaq_prcnt = dev->qos_parse_data[i].iaq_prcnt;
+		qos->taq_prcnt = dev->qos_parse_data[i].taq_prcnt;
+		qos->xaq_prcnt = dev->qos_parse_data[i].xaq_prcnt;
+	}
+	rc = roc_sso_hwgrp_qos_config(&dev->sso, qos, dev->qos_queue_cnt,
+				      dev->xae_cnt);
+	if (rc < 0) {
+		plt_sso_dbg("failed to configure HWGRP QoS rc = %d", rc);
+		return -EINVAL;
+	}
+	cnxk_sso_cleanup(event_dev, reset_fn, flush_fn, true);
+	rte_mb();
+
+	return 0;
+}
+
 static void
 parse_queue_param(char *value, void *opaque)
 {
diff --git a/drivers/event/cnxk/cnxk_eventdev.h b/drivers/event/cnxk/cnxk_eventdev.h
index 0a3ab71e4..f175c23bb 100644
--- a/drivers/event/cnxk/cnxk_eventdev.h
+++ b/drivers/event/cnxk/cnxk_eventdev.h
@@ -48,6 +48,10 @@ typedef void (*cnxk_sso_hws_setup_t)(void *dev, void *ws, uintptr_t *grp_base);
 typedef void (*cnxk_sso_hws_release_t)(void *dev, void *ws);
 typedef int (*cnxk_sso_link_t)(void *dev, void *ws, uint16_t *map,
 			       uint16_t nb_link);
+typedef void (*cnxk_handle_event_t)(void *arg, struct rte_event ev);
+typedef void (*cnxk_sso_hws_reset_t)(void *arg, void *ws);
+typedef void (*cnxk_sso_hws_flush_t)(void *ws, uint8_t queue_id, uintptr_t base,
+				     cnxk_handle_event_t fn, void *arg);
 
 struct cnxk_sso_qos {
 	uint16_t queue;
@@ -198,5 +202,8 @@ int cnxk_sso_port_setup(struct rte_eventdev *event_dev, uint8_t port_id,
 			cnxk_sso_hws_setup_t hws_setup_fn);
 int cnxk_sso_timeout_ticks(struct rte_eventdev *event_dev, uint64_t ns,
 			   uint64_t *tmo_ticks);
+int cnxk_sso_start(struct rte_eventdev *event_dev,
+		   cnxk_sso_hws_reset_t reset_fn,
+		   cnxk_sso_hws_flush_t flush_fn);
 
 #endif /* __CNXK_EVENTDEV_H__ */
