Enable CONFIG_PACKET

Without CONFIG_PACKET, the kernel refuses AF_PACKET sockets, so those
utilities can't run. For user-level networking in virtualized setups
especially when the test harness relies on DHCP. Thus, we should enable
CONFIG_PACKET (built-in or module) in the guest kernel.

Author: jserv

Makefile

@@ -251,7 +251,9 @@ build-image:
 clean:
 	$(Q)$(RM) $(BIN) $(OBJS) $(deps)
 	$(Q)$(MAKE) -C mini-gdbstub clean
-	$(Q)$(MAKE) -C minislirp/src clean
+	$(Q)if [ -n "$(MINISLIRP_DIR)" ] && [ -d "$(MINISLIRP_DIR)/src" ]; then \
+		$(MAKE) -C $(MINISLIRP_DIR)/src clean; \
+	fi
 
 distclean: clean
 	$(Q)$(RM) riscv-harts.dtsi

configs/linux.config

@@ -472,7 +472,7 @@ CONFIG_NET=y
 #
 # Networking options
 #
-# CONFIG_PACKET is not set
+CONFIG_PACKET=y
 CONFIG_UNIX=y
 CONFIG_UNIX_SCM=y
 CONFIG_AF_UNIX_OOB=y

scripts/build-image.sh

@@ -35,7 +35,7 @@ function do_buildroot
 {
     if [ ! -d buildroot ]; then
         echo "Cloning Buildroot..."
-        ASSERT git clone https://github.com/buildroot/buildroot -b 2024.11.1 --depth=1
+        ASSERT git clone https://github.com/buildroot/buildroot -b 2025.02.x --depth=1
     else
         echo "buildroot/ already exists, skipping clone"
     fi