diff --git a/configs/defconfig b/configs/defconfig
index eb8cafb..c0db7c3 100644
--- a/configs/defconfig
+++ b/configs/defconfig
@@ -4,3 +4,4 @@
 CONFIG_HWBASE_DYNAMIC_MMIO		=
 CONFIG_HWBASE_TIMER_CLOCK_GETTIME	= y
 CONFIG_HWBASE_TIMER_MUTIME		=
+CONFIG_HWBASE_POSIX_FILE		=
diff --git a/configs/posix b/configs/posix
new file mode 100644
index 0000000..183a5b5
--- /dev/null
+++ b/configs/posix
@@ -0,0 +1,7 @@
+CONFIG_HWBASE_DEBUG_NULL		=
+CONFIG_HWBASE_DEBUG_TEXT_IO		= y
+CONFIG_HWBASE_STATIC_MMIO		=
+CONFIG_HWBASE_DYNAMIC_MMIO		= y
+CONFIG_HWBASE_TIMER_CLOCK_GETTIME	= y
+CONFIG_HWBASE_TIMER_MUTIME		=
+CONFIG_HWBASE_POSIX_FILE		= y