diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index dc2aa3d75b39..a3c60e2bde36 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -683,6 +683,7 @@ enum ethtool_link_ext_substate_module {
  * @ETH_SS_STATS_ETH_MAC: names of IEEE 802.3 MAC statistics
  * @ETH_SS_STATS_ETH_CTRL: names of IEEE 802.3 MAC Control statistics
  * @ETH_SS_STATS_RMON: names of RMON statistics
+ * @ETH_SS_HWTSTAMP_FLAG: timestamping flags
  *
  * @ETH_SS_COUNT: number of defined string sets
  */
@@ -708,6 +709,7 @@ enum ethtool_stringset {
 	ETH_SS_STATS_ETH_MAC,
 	ETH_SS_STATS_ETH_CTRL,
 	ETH_SS_STATS_RMON,
+	ETH_SS_HWTSTAMP_FLAG,
 
 	/* add new constants above here */
 	ETH_SS_COUNT
@@ -1416,6 +1418,7 @@ struct ethtool_ts_info {
 	__u32	tx_reserved[3];
 	__u32	rx_filters;
 	__u32	rx_reserved[3];
+	__u32	flag;
 };
 
 /*
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index bb57084ac524..4b7bd7554a3b 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -458,6 +458,7 @@ enum {
 	ETHTOOL_A_TSINFO_TX_TYPES,			/* bitset */
 	ETHTOOL_A_TSINFO_RX_FILTERS,			/* bitset */
 	ETHTOOL_A_TSINFO_PHC_INDEX,			/* u32 */
+	ETHTOOL_A_TSINFO_FLAG,				/* bitset */
 
 	/* add new constants above here */
 	__ETHTOOL_A_TSINFO_CNT,
diff --git a/include/uapi/linux/net_tstamp.h b/include/uapi/linux/net_tstamp.h
index 55501e5e7ac8..4966d5ca521f 100644
--- a/include/uapi/linux/net_tstamp.h
+++ b/include/uapi/linux/net_tstamp.h
@@ -89,7 +89,10 @@ enum hwtstamp_flags {
 	HWTSTAMP_FLAG_BONDED_PHC_INDEX = (1<<0),
 #define HWTSTAMP_FLAG_BONDED_PHC_INDEX	HWTSTAMP_FLAG_BONDED_PHC_INDEX
 
-	HWTSTAMP_FLAG_LAST = HWTSTAMP_FLAG_BONDED_PHC_INDEX,
+	HWTSTAMP_FLAG_DMA_TIMESTAMP = (1<<1),
+#define HWTSTAMP_FLAG_DMA_TIMESTAMP	HWTSTAMP_FLAG_DMA_TIMESTAMP
+
+	HWTSTAMP_FLAG_LAST = HWTSTAMP_FLAG_DMA_TIMESTAMP,
 	HWTSTAMP_FLAG_MASK = (HWTSTAMP_FLAG_LAST - 1) | HWTSTAMP_FLAG_LAST
 };
 
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 566adf85e658..f2a178d162ef 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -406,6 +406,12 @@ const char sof_timestamping_names[][ETH_GSTRING_LEN] = {
 };
 static_assert(ARRAY_SIZE(sof_timestamping_names) == __SOF_TIMESTAMPING_CNT);
 
+const char ts_flag_names[][ETH_GSTRING_LEN] = {
+	[const_ilog2(HWTSTAMP_FLAG_BONDED_PHC_INDEX)]	= "bonded-phc-index",
+	[const_ilog2(HWTSTAMP_FLAG_DMA_TIMESTAMP)]	= "dma-time-stamp",
+};
+static_assert(ARRAY_SIZE(ts_flag_names) == __HWTSTAMP_FLAG_CNT);
+
 const char ts_tx_type_names[][ETH_GSTRING_LEN] = {
 	[HWTSTAMP_TX_OFF]		= "off",
 	[HWTSTAMP_TX_ON]		= "on",
diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index c1779657e074..0161e04d4de8 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -13,6 +13,7 @@
 	ETHTOOL_LINK_MODE_ ## speed ## base ## type ## _ ## duplex ## _BIT
 
 #define __SOF_TIMESTAMPING_CNT (const_ilog2(SOF_TIMESTAMPING_LAST) + 1)
+#define __HWTSTAMP_FLAG_CNT (const_ilog2(HWTSTAMP_FLAG_LAST) + 1)
 
 struct link_mode_info {
 	int				speed;
@@ -36,6 +37,7 @@ extern const char sof_timestamping_names[][ETH_GSTRING_LEN];
 extern const char ts_tx_type_names[][ETH_GSTRING_LEN];
 extern const char ts_rx_filter_names[][ETH_GSTRING_LEN];
 extern const char udp_tunnel_type_names[][ETH_GSTRING_LEN];
+extern const char ts_flag_names[][ETH_GSTRING_LEN];
 
 int __ethtool_get_link(struct net_device *dev);
 
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index 3f7de54d85fb..b3fb1b1c516c 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -105,6 +105,11 @@ static const struct strset_info info_template[] = {
 		.count		= __ETHTOOL_A_STATS_RMON_CNT,
 		.strings	= stats_rmon_names,
 	},
+	[ETH_SS_HWTSTAMP_FLAG] = {
+		.per_dev	= false,
+		.count		= __HWTSTAMP_FLAG_CNT,
+		.strings	= ts_flag_names,
+	},
 };
 
 struct strset_req_info {
diff --git a/net/ethtool/tsinfo.c b/net/ethtool/tsinfo.c
index 63b5814bd460..af5acf7bf561 100644
--- a/net/ethtool/tsinfo.c
+++ b/net/ethtool/tsinfo.c
@@ -52,6 +52,7 @@ static int tsinfo_reply_size(const struct ethnl_req_info *req_base,
 	BUILD_BUG_ON(__SOF_TIMESTAMPING_CNT > 32);
 	BUILD_BUG_ON(__HWTSTAMP_TX_CNT > 32);
 	BUILD_BUG_ON(__HWTSTAMP_FILTER_CNT > 32);
+	BUILD_BUG_ON(__HWTSTAMP_FLAG_CNT > 32);
 
 	if (ts_info->so_timestamping) {
 		ret = ethnl_bitset32_size(&ts_info->so_timestamping, NULL,
@@ -79,6 +80,14 @@ static int tsinfo_reply_size(const struct ethnl_req_info *req_base,
 	}
 	if (ts_info->phc_index >= 0)
 		len += nla_total_size(sizeof(u32));	/* _TSINFO_PHC_INDEX */
+	if (ts_info->flag) {
+		ret = ethnl_bitset32_size(&ts_info->flag, NULL,
+					  __HWTSTAMP_FLAG_CNT,
+					  ts_flag_names, compact);
+		if (ret < 0)
+			return ret;
+		len += ret;	/* _TSINFO_FLAG */
+	}
 
 	return len;
 }
@@ -119,6 +128,14 @@ static int tsinfo_fill_reply(struct sk_buff *skb,
 	if (ts_info->phc_index >= 0 &&
 	    nla_put_u32(skb, ETHTOOL_A_TSINFO_PHC_INDEX, ts_info->phc_index))
 		return -EMSGSIZE;
+	if (ts_info->flag) {
+		ret = ethnl_put_bitset32(skb, ETHTOOL_A_TSINFO_FLAG,
+					 &ts_info->flag, NULL,
+					 __HWTSTAMP_FLAG_CNT,
+					 ts_flag_names, compact);
+		if (ret < 0)
+			return ret;
+	}
 
 	return 0;
 }
