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tools/virtio: option to build an out of tree module

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Handy for testing with distro kernels.
Warn that the resulting module is completely unsupported,
and isn't intended for production use.

Usage:
        make oot # builds vhost_test.ko, vhost.ko
        make oot-clean # cleans out files created

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2020-02-06 02:54:32 -05:00
parent 16fbf79b0f
commit d5f5ee2a49
1 changed files with 26 additions and 1 deletions
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27
tools/virtio/Makefile
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@ -8,7 +8,32 @@ CFLAGS += -g -O2 -Werror -Wall -I. -I../include/ -I ../../usr/include/ -Wno-poin
vpath %.c ../../drivers/virtio ../../drivers/vhost
mod:
${MAKE} -C `pwd`/../.. M=`pwd`/vhost_test V=${V}
.PHONY: all test mod clean
#oot: build vhost as an out of tree module for a distro kernel
#no effort is taken to make it actually build or work, but tends to mostly work
#if the distro kernel is very close to upstream
#unsupported! this is a development tool only, don't use the
#resulting modules in production!
OOT_KSRC=/lib/modules/$$(uname -r)/build
OOT_VHOST=`pwd`/../../drivers/vhost
#Everyone depends on vhost
#Tweak the below to enable more modules
OOT_CONFIGS=\
CONFIG_VHOST=m \
CONFIG_VHOST_NET=n \
CONFIG_VHOST_SCSI=n \
CONFIG_VHOST_VSOCK=n
OOT_BUILD=KCFLAGS="-I "${OOT_VHOST} ${MAKE} -C ${OOT_KSRC} V=${V}
oot-build:
echo "UNSUPPORTED! Don't use the resulting modules in production!"
${OOT_BUILD} M=`pwd`/vhost_test
${OOT_BUILD} M=${OOT_VHOST} ${OOT_CONFIGS}
oot-clean: oot-build
oot: oot-build
oot-clean: OOT_BUILD+=clean
.PHONY: all test mod clean vhost oot oot-clean oot-build
clean:
${RM} *.o vringh_test virtio_test vhost_test/*.o vhost_test/.*.cmd \
vhost_test/Module.symvers vhost_test/modules.order *.d