diff --git a/arch/sim/src/Makefile b/arch/sim/src/Makefile
index bbfed35b942..2afb1a5a7b4 100644
--- a/arch/sim/src/Makefile
+++ b/arch/sim/src/Makefile
@@ -75,7 +75,8 @@ CSRCS += up_vfork.c
 endif
 endif
 
-VPATH = sim
+VPATH = :sim
+VPATH += :sim/posix
 DEPPATH = $(patsubst %,--dep-path %,$(subst :, ,$(VPATH)))
 
 CFLAGS += -fvisibility=default
@@ -84,6 +85,7 @@ HOSTCFLAGS = $(ARCHWARNINGS) $(ARCHOPTIMIZATION) \
    -fvisibility=default
 
 HOSTCFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)}
+HOSTCFLAGS += ${shell $(INCDIR) "$(CC)" $(ARCH_SRCDIR)$(DELIM)chip}
 ifeq ($(CONFIG_HOST_MACOS),y)
   HOSTCFLAGS += -Wno-deprecated-declarations
 endif
diff --git a/arch/sim/src/sim/up_hcisocket_host.c b/arch/sim/src/sim/posix/up_hcisocket_host.c
similarity index 99%
rename from arch/sim/src/sim/up_hcisocket_host.c
rename to arch/sim/src/sim/posix/up_hcisocket_host.c
index e03284e2cbc..ece872896af 100644
--- a/arch/sim/src/sim/up_hcisocket_host.c
+++ b/arch/sim/src/sim/posix/up_hcisocket_host.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_hcisocket_host.c
+ * arch/sim/src/sim/posix/up_hcisocket_host.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_hostfs.c b/arch/sim/src/sim/posix/up_hostfs.c
similarity index 99%
rename from arch/sim/src/sim/up_hostfs.c
rename to arch/sim/src/sim/posix/up_hostfs.c
index 607f04212c8..a53320c0fdc 100644
--- a/arch/sim/src/sim/up_hostfs.c
+++ b/arch/sim/src/sim/posix/up_hostfs.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_hostfs.c
+ * arch/sim/src/sim/posix/up_hostfs.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_hostirq.c b/arch/sim/src/sim/posix/up_hostirq.c
similarity index 99%
rename from arch/sim/src/sim/up_hostirq.c
rename to arch/sim/src/sim/posix/up_hostirq.c
index 2e05b94f4e3..bd8c31f2e29 100644
--- a/arch/sim/src/sim/up_hostirq.c
+++ b/arch/sim/src/sim/posix/up_hostirq.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_hostirq.c
+ * arch/sim/src/sim/posix/up_hostirq.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_hostmemory.c b/arch/sim/src/sim/posix/up_hostmemory.c
similarity index 99%
rename from arch/sim/src/sim/up_hostmemory.c
rename to arch/sim/src/sim/posix/up_hostmemory.c
index 5875c8e8281..86e98d8bd01 100644
--- a/arch/sim/src/sim/up_hostmemory.c
+++ b/arch/sim/src/sim/posix/up_hostmemory.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_hostmemory.c
+ * arch/sim/src/sim/posix/up_hostmemory.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_hostmisc.c b/arch/sim/src/sim/posix/up_hostmisc.c
similarity index 97%
rename from arch/sim/src/sim/up_hostmisc.c
rename to arch/sim/src/sim/posix/up_hostmisc.c
index 75b7e665fe7..159aea197e2 100644
--- a/arch/sim/src/sim/up_hostmisc.c
+++ b/arch/sim/src/sim/posix/up_hostmisc.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_hostmisc.c
+ * arch/sim/src/sim/posix/up_hostmisc.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_hosttime.c b/arch/sim/src/sim/posix/up_hosttime.c
similarity index 98%
rename from arch/sim/src/sim/up_hosttime.c
rename to arch/sim/src/sim/posix/up_hosttime.c
index 4e6e0dbb534..ff148cb9bfa 100644
--- a/arch/sim/src/sim/up_hosttime.c
+++ b/arch/sim/src/sim/posix/up_hosttime.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_hosttime.c
+ * arch/sim/src/sim/posix/up_hosttime.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_i2cbus.h b/arch/sim/src/sim/posix/up_i2cbus.h
similarity index 100%
rename from arch/sim/src/sim/up_i2cbus.h
rename to arch/sim/src/sim/posix/up_i2cbus.h
diff --git a/arch/sim/src/sim/up_i2cbuslinux.c b/arch/sim/src/sim/posix/up_i2cbuslinux.c
similarity index 99%
rename from arch/sim/src/sim/up_i2cbuslinux.c
rename to arch/sim/src/sim/posix/up_i2cbuslinux.c
index 09512b41712..9a4574090d5 100644
--- a/arch/sim/src/sim/up_i2cbuslinux.c
+++ b/arch/sim/src/sim/posix/up_i2cbuslinux.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_i2cbuslinux.c
+ * arch/sim/src/sim/posix/up_i2cbuslinux.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_simsmp.c b/arch/sim/src/sim/posix/up_simsmp.c
similarity index 99%
rename from arch/sim/src/sim/up_simsmp.c
rename to arch/sim/src/sim/posix/up_simsmp.c
index c802675efbd..0cfc35d3bad 100644
--- a/arch/sim/src/sim/up_simsmp.c
+++ b/arch/sim/src/sim/posix/up_simsmp.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_simsmp.c
+ * arch/sim/src/sim/posix/up_simsmp.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_simuart.c b/arch/sim/src/sim/posix/up_simuart.c
similarity index 99%
rename from arch/sim/src/sim/up_simuart.c
rename to arch/sim/src/sim/posix/up_simuart.c
index 5e2aa56db55..dc1ab199fa4 100644
--- a/arch/sim/src/sim/up_simuart.c
+++ b/arch/sim/src/sim/posix/up_simuart.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_simuart.c
+ * arch/sim/src/sim/posix/up_simuart.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_spi.h b/arch/sim/src/sim/posix/up_spi.h
similarity index 100%
rename from arch/sim/src/sim/up_spi.h
rename to arch/sim/src/sim/posix/up_spi.h
diff --git a/arch/sim/src/sim/up_spilinux.c b/arch/sim/src/sim/posix/up_spilinux.c
similarity index 99%
rename from arch/sim/src/sim/up_spilinux.c
rename to arch/sim/src/sim/posix/up_spilinux.c
index 488a0bb8be6..6504f009ff8 100644
--- a/arch/sim/src/sim/up_spilinux.c
+++ b/arch/sim/src/sim/posix/up_spilinux.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_spilinux.c
+ * arch/sim/src/sim/posix/up_spilinux.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_tapdev.c b/arch/sim/src/sim/posix/up_tapdev.c
similarity index 99%
rename from arch/sim/src/sim/up_tapdev.c
rename to arch/sim/src/sim/posix/up_tapdev.c
index f1fcd1aaaab..d56b19286e7 100644
--- a/arch/sim/src/sim/up_tapdev.c
+++ b/arch/sim/src/sim/posix/up_tapdev.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_tapdev.c
+ * arch/sim/src/sim/posix/up_tapdev.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_testset.c b/arch/sim/src/sim/posix/up_testset.c
similarity index 98%
rename from arch/sim/src/sim/up_testset.c
rename to arch/sim/src/sim/posix/up_testset.c
index 4716ecfdc76..798331a2908 100644
--- a/arch/sim/src/sim/up_testset.c
+++ b/arch/sim/src/sim/posix/up_testset.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_testset.c
+ * arch/sim/src/sim/posix/up_testset.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_usrsock_host.c b/arch/sim/src/sim/posix/up_usrsock_host.c
similarity index 99%
rename from arch/sim/src/sim/up_usrsock_host.c
rename to arch/sim/src/sim/posix/up_usrsock_host.c
index 6494ecb613b..a52b78d23bc 100644
--- a/arch/sim/src/sim/up_usrsock_host.c
+++ b/arch/sim/src/sim/posix/up_usrsock_host.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_usrsock_host.c
+ * arch/sim/src/sim/posix/up_usrsock_host.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_vpnkit.c b/arch/sim/src/sim/posix/up_vpnkit.c
similarity index 99%
rename from arch/sim/src/sim/up_vpnkit.c
rename to arch/sim/src/sim/posix/up_vpnkit.c
index e144be376cd..fc9d3d864b0 100644
--- a/arch/sim/src/sim/up_vpnkit.c
+++ b/arch/sim/src/sim/posix/up_vpnkit.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_vpnkit.c
+ * arch/sim/src/sim/posix/up_vpnkit.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_wpcap.c b/arch/sim/src/sim/posix/up_wpcap.c
similarity index 99%
rename from arch/sim/src/sim/up_wpcap.c
rename to arch/sim/src/sim/posix/up_wpcap.c
index 2d0b0e04934..7915aa7d88c 100644
--- a/arch/sim/src/sim/up_wpcap.c
+++ b/arch/sim/src/sim/posix/up_wpcap.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_wpcap.c
+ * arch/sim/src/sim/posix/up_wpcap.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_x11eventloop.c b/arch/sim/src/sim/posix/up_x11eventloop.c
similarity index 98%
rename from arch/sim/src/sim/up_x11eventloop.c
rename to arch/sim/src/sim/posix/up_x11eventloop.c
index 4bf95ebf322..6f4fa69750d 100644
--- a/arch/sim/src/sim/up_x11eventloop.c
+++ b/arch/sim/src/sim/posix/up_x11eventloop.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_x11eventloop.c
+ * arch/sim/src/sim/posix/up_x11eventloop.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
diff --git a/arch/sim/src/sim/up_x11framebuffer.c b/arch/sim/src/sim/posix/up_x11framebuffer.c
similarity index 99%
rename from arch/sim/src/sim/up_x11framebuffer.c
rename to arch/sim/src/sim/posix/up_x11framebuffer.c
index 3ba4255ca00..cee426b9538 100644
--- a/arch/sim/src/sim/up_x11framebuffer.c
+++ b/arch/sim/src/sim/posix/up_x11framebuffer.c
@@ -1,5 +1,5 @@
 /****************************************************************************
- * arch/sim/src/sim/up_x11framebuffer.c
+ * arch/sim/src/sim/posix/up_x11framebuffer.c
  *
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with