diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index d048cabc4246..1bc9ceb16b70 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -241,6 +241,27 @@ ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
 	return in_len;
 }
 
+/*
+ * ib_uverbs_query_port_resp.port_cap_flags started out as just a copy of the
+ * PortInfo CapabilityMask, but was extended with unique bits.
+ */
+static u32 make_port_cap_flags(const struct ib_port_attr *attr)
+{
+	u32 res;
+
+	/* All IBA CapabilityMask bits are passed through here, except bit 26,
+	 * which is overridden with IP_BASED_GIDS. This is due to a historical
+	 * mistake in the implementation of IP_BASED_GIDS. Otherwise all other
+	 * bits match the IBA definition across all kernel versions.
+	 */
+	res = attr->port_cap_flags & ~(u32)IB_UVERBS_PCF_IP_BASED_GIDS;
+
+	if (attr->ip_gids)
+		res |= IB_UVERBS_PCF_IP_BASED_GIDS;
+
+	return res;
+}
+
 ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 			     struct ib_device *ib_dev,
 			     const char __user *buf,
@@ -267,7 +288,7 @@ ssize_t ib_uverbs_query_port(struct ib_uverbs_file *file,
 	resp.max_mtu 	     = attr.max_mtu;
 	resp.active_mtu      = attr.active_mtu;
 	resp.gid_tbl_len     = attr.gid_tbl_len;
-	resp.port_cap_flags  = attr.port_cap_flags;
+	resp.port_cap_flags  = make_port_cap_flags(&attr);
 	resp.max_msg_sz      = attr.max_msg_sz;
 	resp.bad_pkey_cntr   = attr.bad_pkey_cntr;
 	resp.qkey_viol_cntr  = attr.qkey_viol_cntr;
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 6c0c6d3426e0..492c750f7ed6 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -244,8 +244,8 @@ int bnxt_re_query_port(struct ib_device *ibdev, u8 port_num,
 	port_attr->gid_tbl_len = dev_attr->max_sgid;
 	port_attr->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
 				    IB_PORT_DEVICE_MGMT_SUP |
-				    IB_PORT_VENDOR_CLASS_SUP |
-				    IB_PORT_IP_BASED_GIDS;
+				    IB_PORT_VENDOR_CLASS_SUP;
+	port_attr->ip_gids = true;
 
 	port_attr->max_msg_sz = (u32)BNXT_RE_MAX_MR_SIZE_LOW;
 	port_attr->bad_pkey_cntr = 0;
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 5bc522ca9431..ca0f1ee26091 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -762,7 +762,8 @@ static int eth_link_query_port(struct ib_device *ibdev, u8 port,
 					   IB_WIDTH_4X : IB_WIDTH_1X;
 	props->active_speed	=  (((u8 *)mailbox->buf)[5] == 0x20 /*56Gb*/) ?
 					   IB_SPEED_FDR : IB_SPEED_QDR;
-	props->port_cap_flags	= IB_PORT_CM_SUP | IB_PORT_IP_BASED_GIDS;
+	props->port_cap_flags	= IB_PORT_CM_SUP;
+	props->ip_gids = true;
 	props->gid_tbl_len	= mdev->dev->caps.gid_table_len[port];
 	props->max_msg_sz	= mdev->dev->caps.max_msg_sz;
 	props->pkey_tbl_len	= 1;
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 0f482d2a760f..d1f1beefe599 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -419,8 +419,8 @@ static int mlx5_query_port_roce(struct ib_device *device, u8 port_num,
 	translate_eth_proto_oper(eth_prot_oper, &props->active_speed,
 				 &props->active_width);
 
-	props->port_cap_flags  |= IB_PORT_CM_SUP;
-	props->port_cap_flags  |= IB_PORT_IP_BASED_GIDS;
+	props->port_cap_flags |= IB_PORT_CM_SUP;
+	props->ip_gids = true;
 
 	props->gid_tbl_len      = MLX5_CAP_ROCE(dev->mdev,
 						roce_address_table_size);
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index 1f057fdb3a8c..9d0431e01dce 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -197,11 +197,10 @@ int ocrdma_query_port(struct ib_device *ibdev,
 	props->sm_lid = 0;
 	props->sm_sl = 0;
 	props->state = port_state;
-	props->port_cap_flags =
-	    IB_PORT_CM_SUP |
-	    IB_PORT_REINIT_SUP |
-	    IB_PORT_DEVICE_MGMT_SUP | IB_PORT_VENDOR_CLASS_SUP |
-	    IB_PORT_IP_BASED_GIDS;
+	props->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_REINIT_SUP |
+				IB_PORT_DEVICE_MGMT_SUP |
+				IB_PORT_VENDOR_CLASS_SUP;
+	props->ip_gids = true;
 	props->gid_tbl_len = OCRDMA_MAX_SGID;
 	props->pkey_tbl_len = 1;
 	props->bad_pkey_cntr = 0;
diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 0c41d54f586b..b82c5d5fb0e3 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -225,7 +225,7 @@ int qedr_query_port(struct ib_device *ibdev, u8 port, struct ib_port_attr *attr)
 	attr->lmc = 0;
 	attr->sm_lid = 0;
 	attr->sm_sl = 0;
-	attr->port_cap_flags = IB_PORT_IP_BASED_GIDS;
+	attr->ip_gids = true;
 	if (rdma_protocol_iwarp(&dev->ibdev, 1)) {
 		attr->gid_tbl_len = 1;
 		attr->pkey_tbl_len = 1;
diff --git a/drivers/infiniband/hw/qib/qib_verbs.h b/drivers/infiniband/hw/qib/qib_verbs.h
index f9a46768a19a..e72562a8959a 100644
--- a/drivers/infiniband/hw/qib/qib_verbs.h
+++ b/drivers/infiniband/hw/qib/qib_verbs.h
@@ -78,9 +78,6 @@ struct qib_verbs_txreq;
 
 #define QIB_VENDOR_IPG		cpu_to_be16(0xFFA0)
 
-/* XXX Should be defined in ib_verbs.h enum ib_port_cap_flags */
-#define IB_PORT_OTHER_LOCAL_CHANGES_SUP (1 << 26)
-
 #define IB_DEFAULT_GID_PREFIX	cpu_to_be64(0xfe80000000000000ULL)
 
 /* Values for set/get portinfo VLCap OperationalVLs */
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c
index 816cc285daf6..b65d10b0a875 100644
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c
@@ -155,7 +155,8 @@ int pvrdma_query_port(struct ib_device *ibdev, u8 port,
 	props->gid_tbl_len = resp->attrs.gid_tbl_len;
 	props->port_cap_flags =
 		pvrdma_port_cap_flags_to_ib(resp->attrs.port_cap_flags);
-	props->port_cap_flags |= IB_PORT_CM_SUP | IB_PORT_IP_BASED_GIDS;
+	props->port_cap_flags |= IB_PORT_CM_SUP;
+	props->ip_gids = true;
 	props->max_msg_sz = resp->attrs.max_msg_sz;
 	props->bad_pkey_cntr = resp->attrs.bad_pkey_cntr;
 	props->qkey_viol_cntr = resp->attrs.qkey_viol_cntr;
diff --git a/include/rdma/ib_mad.h b/include/rdma/ib_mad.h
index 2f4f1768ded4..f6ba366051c7 100644
--- a/include/rdma/ib_mad.h
+++ b/include/rdma/ib_mad.h
@@ -262,6 +262,39 @@ struct ib_class_port_info {
 	__be32			trap_qkey;
 };
 
+/* PortInfo CapabilityMask */
+enum ib_port_capability_mask_bits {
+	IB_PORT_SM = 1 << 1,
+	IB_PORT_NOTICE_SUP = 1 << 2,
+	IB_PORT_TRAP_SUP = 1 << 3,
+	IB_PORT_OPT_IPD_SUP = 1 << 4,
+	IB_PORT_AUTO_MIGR_SUP = 1 << 5,
+	IB_PORT_SL_MAP_SUP = 1 << 6,
+	IB_PORT_MKEY_NVRAM = 1 << 7,
+	IB_PORT_PKEY_NVRAM = 1 << 8,
+	IB_PORT_LED_INFO_SUP = 1 << 9,
+	IB_PORT_SM_DISABLED = 1 << 10,
+	IB_PORT_SYS_IMAGE_GUID_SUP = 1 << 11,
+	IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP = 1 << 12,
+	IB_PORT_EXTENDED_SPEEDS_SUP = 1 << 14,
+	IB_PORT_CM_SUP = 1 << 16,
+	IB_PORT_SNMP_TUNNEL_SUP = 1 << 17,
+	IB_PORT_REINIT_SUP = 1 << 18,
+	IB_PORT_DEVICE_MGMT_SUP = 1 << 19,
+	IB_PORT_VENDOR_CLASS_SUP = 1 << 20,
+	IB_PORT_DR_NOTICE_SUP = 1 << 21,
+	IB_PORT_CAP_MASK_NOTICE_SUP = 1 << 22,
+	IB_PORT_BOOT_MGMT_SUP = 1 << 23,
+	IB_PORT_LINK_LATENCY_SUP = 1 << 24,
+	IB_PORT_CLIENT_REG_SUP = 1 << 25,
+	IB_PORT_OTHER_LOCAL_CHANGES_SUP = 1 << 26,
+	IB_PORT_LINK_SPEED_WIDTH_TABLE_SUP = 1 << 27,
+	IB_PORT_VENDOR_SPECIFIC_MADS_TABLE_SUP = 1 << 28,
+	IB_PORT_MCAST_PKEY_TRAP_SUPPRESSION_SUP = 1 << 29,
+	IB_PORT_MCAST_FDB_TOP_SUP = 1 << 30,
+	IB_PORT_HIERARCHY_INFO_SUP = 1ULL << 31,
+};
+
 #define OPA_CLASS_PORT_INFO_PR_SUPPORT BIT(26)
 
 struct opa_class_port_info {
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 031d121190fd..98e025759791 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -432,33 +432,6 @@ enum ib_port_state {
 	IB_PORT_ACTIVE_DEFER	= 5
 };
 
-enum ib_port_cap_flags {
-	IB_PORT_SM				= 1 <<  1,
-	IB_PORT_NOTICE_SUP			= 1 <<  2,
-	IB_PORT_TRAP_SUP			= 1 <<  3,
-	IB_PORT_OPT_IPD_SUP                     = 1 <<  4,
-	IB_PORT_AUTO_MIGR_SUP			= 1 <<  5,
-	IB_PORT_SL_MAP_SUP			= 1 <<  6,
-	IB_PORT_MKEY_NVRAM			= 1 <<  7,
-	IB_PORT_PKEY_NVRAM			= 1 <<  8,
-	IB_PORT_LED_INFO_SUP			= 1 <<  9,
-	IB_PORT_SM_DISABLED			= 1 << 10,
-	IB_PORT_SYS_IMAGE_GUID_SUP		= 1 << 11,
-	IB_PORT_PKEY_SW_EXT_PORT_TRAP_SUP	= 1 << 12,
-	IB_PORT_EXTENDED_SPEEDS_SUP             = 1 << 14,
-	IB_PORT_CM_SUP				= 1 << 16,
-	IB_PORT_SNMP_TUNNEL_SUP			= 1 << 17,
-	IB_PORT_REINIT_SUP			= 1 << 18,
-	IB_PORT_DEVICE_MGMT_SUP			= 1 << 19,
-	IB_PORT_VENDOR_CLASS_SUP		= 1 << 20,
-	IB_PORT_DR_NOTICE_SUP			= 1 << 21,
-	IB_PORT_CAP_MASK_NOTICE_SUP		= 1 << 22,
-	IB_PORT_BOOT_MGMT_SUP			= 1 << 23,
-	IB_PORT_LINK_LATENCY_SUP		= 1 << 24,
-	IB_PORT_CLIENT_REG_SUP			= 1 << 25,
-	IB_PORT_IP_BASED_GIDS			= 1 << 26,
-};
-
 enum ib_port_width {
 	IB_WIDTH_1X	= 1,
 	IB_WIDTH_4X	= 2,
@@ -597,6 +570,9 @@ struct ib_port_attr {
 	enum ib_mtu		max_mtu;
 	enum ib_mtu		active_mtu;
 	int			gid_tbl_len;
+	unsigned int		grh_required:1;
+	unsigned int		ip_gids:1;
+	/* This is the value from PortInfo CapabilityMask, defined by IBA */
 	u32			port_cap_flags;
 	u32			max_msg_sz;
 	u32			bad_pkey_cntr;
@@ -612,7 +588,6 @@ struct ib_port_attr {
 	u8			active_width;
 	u8			active_speed;
 	u8                      phys_state;
-	bool			grh_required;
 };
 
 enum ib_device_modify_flags {
diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h
index 625545d862d7..1220f1df3ded 100644
--- a/include/uapi/rdma/ib_user_ioctl_verbs.h
+++ b/include/uapi/rdma/ib_user_ioctl_verbs.h
@@ -40,6 +40,44 @@
 #define RDMA_UAPI_PTR(_type, _name)	__aligned_u64 _name
 #endif
 
+enum ib_uverbs_query_port_cap_flags {
+	IB_UVERBS_PCF_SM = 1 << 1,
+	IB_UVERBS_PCF_NOTICE_SUP = 1 << 2,
+	IB_UVERBS_PCF_TRAP_SUP = 1 << 3,
+	IB_UVERBS_PCF_OPT_IPD_SUP = 1 << 4,
+	IB_UVERBS_PCF_AUTO_MIGR_SUP = 1 << 5,
+	IB_UVERBS_PCF_SL_MAP_SUP = 1 << 6,
+	IB_UVERBS_PCF_MKEY_NVRAM = 1 << 7,
+	IB_UVERBS_PCF_PKEY_NVRAM = 1 << 8,
+	IB_UVERBS_PCF_LED_INFO_SUP = 1 << 9,
+	IB_UVERBS_PCF_SM_DISABLED = 1 << 10,
+	IB_UVERBS_PCF_SYS_IMAGE_GUID_SUP = 1 << 11,
+	IB_UVERBS_PCF_PKEY_SW_EXT_PORT_TRAP_SUP = 1 << 12,
+	IB_UVERBS_PCF_EXTENDED_SPEEDS_SUP = 1 << 14,
+	IB_UVERBS_PCF_CM_SUP = 1 << 16,
+	IB_UVERBS_PCF_SNMP_TUNNEL_SUP = 1 << 17,
+	IB_UVERBS_PCF_REINIT_SUP = 1 << 18,
+	IB_UVERBS_PCF_DEVICE_MGMT_SUP = 1 << 19,
+	IB_UVERBS_PCF_VENDOR_CLASS_SUP = 1 << 20,
+	IB_UVERBS_PCF_DR_NOTICE_SUP = 1 << 21,
+	IB_UVERBS_PCF_CAP_MASK_NOTICE_SUP = 1 << 22,
+	IB_UVERBS_PCF_BOOT_MGMT_SUP = 1 << 23,
+	IB_UVERBS_PCF_LINK_LATENCY_SUP = 1 << 24,
+	IB_UVERBS_PCF_CLIENT_REG_SUP = 1 << 25,
+	/*
+	 * IsOtherLocalChangesNoticeSupported is aliased by IP_BASED_GIDS and
+	 * is inaccessible
+	 */
+	IB_UVERBS_PCF_LINK_SPEED_WIDTH_TABLE_SUP = 1 << 27,
+	IB_UVERBS_PCF_VENDOR_SPECIFIC_MADS_TABLE_SUP = 1 << 28,
+	IB_UVERBS_PCF_MCAST_PKEY_TRAP_SUPPRESSION_SUP = 1 << 29,
+	IB_UVERBS_PCF_MCAST_FDB_TOP_SUP = 1 << 30,
+	IB_UVERBS_PCF_HIERARCHY_INFO_SUP = 1ULL << 31,
+
+	/* NOTE this is an internal flag, not an IBA flag */
+	IB_UVERBS_PCF_IP_BASED_GIDS = 1 << 26,
+};
+
 enum ib_uverbs_flow_action_esp_keymat {
 	IB_UVERBS_FLOW_ACTION_ESP_KEYMAT_AES_GCM,
 };
diff --git a/include/uapi/rdma/ib_user_verbs.h b/include/uapi/rdma/ib_user_verbs.h
index 4f9991de8e3a..0a9070abb3f8 100644
--- a/include/uapi/rdma/ib_user_verbs.h
+++ b/include/uapi/rdma/ib_user_verbs.h
@@ -279,7 +279,7 @@ struct ib_uverbs_query_port {
 };
 
 struct ib_uverbs_query_port_resp {
-	__u32 port_cap_flags;
+	__u32 port_cap_flags;		/* see ib_uverbs_query_port_cap_flags */
 	__u32 max_msg_sz;
 	__u32 bad_pkey_cntr;
 	__u32 qkey_viol_cntr;