diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig
index cc174174c745b86be70cd2673137bb98db0e3c40..d95a1909d68a5fc1c85dd85bd6349ca619cc3a5a 100644
--- a/arch/arm64/configs/openeuler_defconfig
+++ b/arch/arm64/configs/openeuler_defconfig
@@ -873,6 +873,7 @@ CONFIG_MODPROBE_PATH="/sbin/modprobe"
 CONFIG_MODULES_TREE_LOOKUP=y
 CONFIG_BLOCK=y
 CONFIG_BLOCK_LEGACY_AUTOLOAD=y
+CONFIG_BLK_RQ_ALLOC_TIME=y
 CONFIG_BLK_CGROUP_RWSTAT=y
 CONFIG_BLK_CGROUP_PUNT_BIO=y
 CONFIG_BLK_DEV_BSG_COMMON=y
@@ -888,7 +889,8 @@ CONFIG_BLK_WBT=y
 CONFIG_BLK_WBT_MQ=y
 # CONFIG_BLK_CGROUP_IOLATENCY is not set
 # CONFIG_BLK_CGROUP_FC_APPID is not set
-# CONFIG_BLK_CGROUP_IOCOST is not set
+CONFIG_BLK_CGROUP_IOCOST=y
+CONFIG_BLK_CGROUP_LEGACY_IOCOST=y
 # CONFIG_BLK_CGROUP_IOPRIO is not set
 CONFIG_BLK_DEBUG_FS=y
 CONFIG_BLK_DEBUG_FS_ZONED=y
diff --git a/arch/x86/configs/openeuler_defconfig b/arch/x86/configs/openeuler_defconfig
index d929d6bb706a4a66efbd060d533bda4f1051fb8f..8d3d5abc3f5dfddb632bcbb5e1bbdfb5c90ac070 100644
--- a/arch/x86/configs/openeuler_defconfig
+++ b/arch/x86/configs/openeuler_defconfig
@@ -938,6 +938,7 @@ CONFIG_MODPROBE_PATH="/sbin/modprobe"
 CONFIG_MODULES_TREE_LOOKUP=y
 CONFIG_BLOCK=y
 CONFIG_BLOCK_LEGACY_AUTOLOAD=y
+CONFIG_BLK_RQ_ALLOC_TIME=y
 CONFIG_BLK_CGROUP_RWSTAT=y
 CONFIG_BLK_CGROUP_PUNT_BIO=y
 CONFIG_BLK_DEV_BSG_COMMON=y
@@ -953,7 +954,8 @@ CONFIG_BLK_WBT=y
 CONFIG_BLK_WBT_MQ=y
 # CONFIG_BLK_CGROUP_IOLATENCY is not set
 # CONFIG_BLK_CGROUP_FC_APPID is not set
-# CONFIG_BLK_CGROUP_IOCOST is not set
+CONFIG_BLK_CGROUP_IOCOST=y
+CONFIG_BLK_CGROUP_LEGACY_IOCOST=y
 # CONFIG_BLK_CGROUP_IOPRIO is not set
 CONFIG_BLK_DEBUG_FS=y
 CONFIG_BLK_DEBUG_FS_ZONED=y
diff --git a/block/Kconfig b/block/Kconfig
index 03b53a50939fd0bfbb743b9465b5ea6385d04268..7c7187366450fa1d863c85c1890143673240e713 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -188,6 +188,16 @@ config BLK_CGROUP_IOCOST
 	distributes IO capacity between different groups based on
 	their share of the overall weight distribution.
 
+config BLK_CGROUP_LEGACY_IOCOST
+	bool "Enable iocost in cgroup v1"
+	default n
+	depends on BLK_CGROUP_IOCOST=y
+	help
+	Enabling this option enables the .cost.weight interface for cost
+	model based proportional IO control when cgroup is version 1.
+
+	If unsure, say N.
+
 config BLK_CGROUP_IOPRIO
 	bool "Cgroup I/O controller for assigning an I/O priority class"
 	depends on BLK_CGROUP
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 089fcb9cfce37011f4cf6ec1f86ba36853fed381..92ad34e9537891d0ebd224066e118f1f1a5926b0 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -3490,6 +3490,30 @@ static ssize_t ioc_cost_model_write(struct kernfs_open_file *of, char *input,
 	return ret;
 }
 
+#ifdef CONFIG_BLK_CGROUP_LEGACY_IOCOST
+static struct cftype ioc_legacy_files[] = {
+	{
+		.name = "cost.weight",
+		.flags = CFTYPE_NOT_ON_ROOT,
+		.seq_show = ioc_weight_show,
+		.write = ioc_weight_write,
+	},
+	{
+		.name = "cost.qos",
+		.flags = CFTYPE_ONLY_ON_ROOT,
+		.seq_show = ioc_qos_show,
+		.write = ioc_qos_write,
+	},
+	{
+		.name = "cost.model",
+		.flags = CFTYPE_ONLY_ON_ROOT,
+		.seq_show = ioc_cost_model_show,
+		.write = ioc_cost_model_write,
+	},
+	{}
+};
+#endif
+
 static struct cftype ioc_files[] = {
 	{
 		.name = "weight",
@@ -3514,6 +3538,9 @@ static struct cftype ioc_files[] = {
 
 static struct blkcg_policy blkcg_policy_iocost = {
 	.dfl_cftypes	= ioc_files,
+#ifdef CONFIG_BLK_CGROUP_LEGACY_IOCOST
+	.legacy_cftypes = ioc_legacy_files,
+#endif
 	.cpd_alloc_fn	= ioc_cpd_alloc,
 	.cpd_free_fn	= ioc_cpd_free,
 	.pd_alloc_fn	= ioc_pd_alloc,