diff --git a/configs/nsim_700_defconfig b/configs/nsim_700_defconfig
index 01a461b851..b10044986f 100644
--- a/configs/nsim_700_defconfig
+++ b/configs/nsim_700_defconfig
@@ -3,6 +3,7 @@ CONFIG_TARGET_NSIM=y
 CONFIG_SYS_TEXT_BASE=0x81000000
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_DEFAULT_DEVICE_TREE="nsim"
+CONFIG_DEBUG_UART=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyARC0,115200n8"
@@ -13,5 +14,8 @@ CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
 CONFIG_DM=y
 CONFIG_DM_SERIAL=y
+CONFIG_DEBUG_ARC_SERIAL=y
+CONFIG_DEBUG_UART_BASE=0xc0fc1000
+CONFIG_DEBUG_UART_CLOCK=70000000
 CONFIG_ARC_SERIAL=y
 CONFIG_USE_PRIVATE_LIBGCC=y
diff --git a/configs/nsim_700be_defconfig b/configs/nsim_700be_defconfig
index 9188ab24d7..6f03145517 100644
--- a/configs/nsim_700be_defconfig
+++ b/configs/nsim_700be_defconfig
@@ -4,6 +4,7 @@ CONFIG_TARGET_NSIM=y
 CONFIG_SYS_TEXT_BASE=0x81000000
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_DEFAULT_DEVICE_TREE="nsim"
+CONFIG_DEBUG_UART=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyARC0,115200n8"
@@ -14,5 +15,8 @@ CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
 CONFIG_DM=y
 CONFIG_DM_SERIAL=y
+CONFIG_DEBUG_ARC_SERIAL=y
+CONFIG_DEBUG_UART_BASE=0xc0fc1000
+CONFIG_DEBUG_UART_CLOCK=70000000
 CONFIG_ARC_SERIAL=y
 CONFIG_USE_PRIVATE_LIBGCC=y
diff --git a/configs/nsim_hs38_defconfig b/configs/nsim_hs38_defconfig
index 58ada454e7..526dd3e5e2 100644
--- a/configs/nsim_hs38_defconfig
+++ b/configs/nsim_hs38_defconfig
@@ -4,6 +4,7 @@ CONFIG_TARGET_NSIM=y
 CONFIG_SYS_TEXT_BASE=0x81000000
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_DEFAULT_DEVICE_TREE="nsim"
+CONFIG_DEBUG_UART=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyARC0,115200n8"
@@ -14,5 +15,8 @@ CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
 CONFIG_DM=y
 CONFIG_DM_SERIAL=y
+CONFIG_DEBUG_ARC_SERIAL=y
+CONFIG_DEBUG_UART_BASE=0xc0fc1000
+CONFIG_DEBUG_UART_CLOCK=70000000
 CONFIG_ARC_SERIAL=y
 CONFIG_USE_PRIVATE_LIBGCC=y
diff --git a/configs/nsim_hs38be_defconfig b/configs/nsim_hs38be_defconfig
index 53feb29a48..141051ded1 100644
--- a/configs/nsim_hs38be_defconfig
+++ b/configs/nsim_hs38be_defconfig
@@ -5,6 +5,7 @@ CONFIG_TARGET_NSIM=y
 CONFIG_SYS_TEXT_BASE=0x81000000
 CONFIG_SYS_CLK_FREQ=70000000
 CONFIG_DEFAULT_DEVICE_TREE="nsim"
+CONFIG_DEBUG_UART=y
 CONFIG_BOOTDELAY=3
 CONFIG_USE_BOOTARGS=y
 CONFIG_BOOTARGS="console=ttyARC0,115200n8"
@@ -15,5 +16,8 @@ CONFIG_OF_CONTROL=y
 CONFIG_OF_EMBED=y
 CONFIG_DM=y
 CONFIG_DM_SERIAL=y
+CONFIG_DEBUG_ARC_SERIAL=y
+CONFIG_DEBUG_UART_BASE=0xc0fc1000
+CONFIG_DEBUG_UART_CLOCK=70000000
 CONFIG_ARC_SERIAL=y
 CONFIG_USE_PRIVATE_LIBGCC=y