add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/tools/virtio/Makefile
..
..
@@ -4,11 +4,39 @@
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 virtio_test: virtio_ring.o virtio_test.o
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 vringh_test: vringh_test.o vringh.o virtio_ring.o
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-CFLAGS += -g -O2 -Werror -Wall -I. -I../include/ -I ../../usr/include/ -Wno-pointer-sign -fno-strict-overflow -fno-strict-aliasing -fno-common -MMD -U_FORTIFY_SOURCE
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+CFLAGS += -g -O2 -Werror -Wno-maybe-uninitialized -Wall -I. -I../include/ -I ../../usr/include/ -Wno-pointer-sign -fno-strict-overflow -fno-strict-aliasing -fno-common -MMD -U_FORTIFY_SOURCE -include ../../include/linux/kconfig.h
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+CFLAGS += -pthread
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+LDFLAGS += -pthread
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 vpath %.c ../../drivers/virtio ../../drivers/vhost
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 mod:
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 	${MAKE} -C `pwd`/../.. M=`pwd`/vhost_test V=${V}
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-.PHONY: all test mod clean
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+
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+#oot: build vhost as an out of tree module for a distro kernel
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+#no effort is taken to make it actually build or work, but tends to mostly work
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+#if the distro kernel is very close to upstream
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+#unsupported! this is a development tool only, don't use the
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+#resulting modules in production!
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+OOT_KSRC=/lib/modules/$$(uname -r)/build
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+OOT_VHOST=`pwd`/../../drivers/vhost
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+#Everyone depends on vhost
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+#Tweak the below to enable more modules
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+OOT_CONFIGS=\
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+	CONFIG_VHOST=m \
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+	CONFIG_VHOST_NET=n \
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+	CONFIG_VHOST_SCSI=n \
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+	CONFIG_VHOST_VSOCK=n \
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+	CONFIG_VHOST_RING=n
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+OOT_BUILD=KCFLAGS="-I "${OOT_VHOST} ${MAKE} -C ${OOT_KSRC} V=${V}
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+oot-build:
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+	echo "UNSUPPORTED! Don't use the resulting modules in production!"
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+	${OOT_BUILD} M=`pwd`/vhost_test
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+	${OOT_BUILD} M=${OOT_VHOST} ${OOT_CONFIGS}
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+
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+oot-clean: oot-build
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+oot: oot-build
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+oot-clean: OOT_BUILD+=clean
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+
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+.PHONY: all test mod clean vhost oot oot-clean oot-build
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 clean:
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 	${RM} *.o vringh_test virtio_test vhost_test/*.o vhost_test/.*.cmd \
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               vhost_test/Module.symvers vhost_test/modules.order *.d