13380 Add virtio-9p (aka VirtFS) filesystem sharing to bhyve

Portions contributed by: Andy Fiddaman <andy@omnios.org>
Reviewed by: Jason King <jason.brian.king@gmail.com>
Reviewed by: Jorge Schrauwen <sjorge@blackdot.be>
Approved by: Robert Mustacchi <rm@fingolfin.org>

exception_lists/cstyle

@@ -1357,6 +1357,7 @@ usr/src/cmd/bhyve/pci_lpc.[ch]
 usr/src/cmd/bhyve/pci_nvme.c
 usr/src/cmd/bhyve/pci_passthru.c
 usr/src/cmd/bhyve/pci_uart.c
+usr/src/cmd/bhyve/pci_virtio_9p.c
 usr/src/cmd/bhyve/pci_virtio_block.c
 usr/src/cmd/bhyve/pci_virtio_console.c
 usr/src/cmd/bhyve/pci_virtio_net.c
@@ -1390,3 +1391,4 @@ usr/src/uts/i86pc/io/vmm/amd/amdvi_*.[ch]
 usr/src/uts/i86pc/io/vmm/amd/ivrs_*.c
 usr/src/uts/i86pc/sys/vmm.h
 usr/src/uts/i86pc/sys/vmm_dev.h
+usr/src/lib/lib9p/common/*

exception_lists/hdrchk

@@ -433,3 +433,4 @@ usr/src/uts/i86pc/io/vmm/vmm_util.h
 usr/src/uts/i86pc/io/vmm/x86.h
 usr/src/uts/i86pc/sys/vmm.h
 usr/src/uts/i86pc/sys/vmm_dev.h
+usr/src/lib/lib9p/common/*

exception_lists/packaging

@@ -861,6 +861,12 @@ usr/lib/amd64/libdwarf.so		i386
 usr/lib/sparcv9/libdwarf.so		sparc
 usr/lib/libdwarf.so
 
+#
+# lib9p is private
+#
+usr/include/lib9p.h
+usr/lib/amd64/lib9p.so			i386
+
 #
 # We're not quite ready to ship ctfconvert and ctfmerge
 #

exception_lists/wscheck

@@ -69,6 +69,7 @@ usr/src/cmd/bhyve/pci_lpc.[ch]
 usr/src/cmd/bhyve/pci_nvme.c
 usr/src/cmd/bhyve/pci_passthru.c
 usr/src/cmd/bhyve/pci_uart.c
+usr/src/cmd/bhyve/pci_virtio_9p.c
 usr/src/cmd/bhyve/pci_virtio_block.c
 usr/src/cmd/bhyve/pci_virtio_console.c
 usr/src/cmd/bhyve/pci_virtio_net.c
@@ -95,3 +96,4 @@ usr/src/cmd/bhyve/xmsr.[ch]
 usr/src/cmd/bhyvectl/bhyvectl.c
 usr/src/contrib/bhyve/*
 usr/src/lib/libvmmapi/common/vmmapi.[ch]
+usr/src/lib/lib9p/common/*

usr/src/cmd/bhyve/Makefile

@@ -56,6 +56,7 @@ SRCS =	acpi.c			\
 	pci_nvme.c		\
 	pci_passthru.c		\
 	pci_uart.c		\
+	pci_virtio_9p.c		\
 	pci_virtio_block.c	\
 	pci_virtio_console.c	\
 	pci_virtio_net.c	\
@@ -115,6 +116,7 @@ CPPFLAGS =	-I$(COMPAT)/bhyve -I$(CONTRIB)/bhyve \
 		-I$(COMPAT)/bhyve/amd64 -I$(CONTRIB)/bhyve/amd64 \
 		-I$(CONTRIB)/bhyve/dev/usb/controller \
 		-I$(CONTRIB)/bhyve/dev/mii \
+		-I$(SRC)/lib/lib9p/common \
 		-I$(SRC)/uts/common/io/e1000api \
 		$(CPPFLAGS.master) \
 		-I$(SRC)/uts/i86pc/io/vmm \
@@ -128,6 +130,8 @@ pci_nvme.o := SMOFF += kmalloc_wrong_size
 
 pci_passthru.o := CERRWARN += -_gcc10=-Wno-address-of-packed-member
 
+pci_virtio_9p.o := SMOFF += kmalloc_wrong_size
+
 pci_xhci.o := CERRWARN += -_gcc10=-Wno-address-of-packed-member
 
 SMOFF += all_func_returns,leaks,no_if_block
@@ -136,6 +140,7 @@ SMOFF += all_func_returns,leaks,no_if_block
 CSTD=		$(CSTD_GNU99)
 
 $(PROG) := LDLIBS += \
+	-l9p \
 	-lsocket \
 	-lnsl \
 	-ldlpi \

usr/src/cmd/bhyve/README.sync

@@ -24,12 +24,6 @@ The draft Save/Restore functionality, added in FreeBSD commit
 yet.  It is not built by default in FreeBSD, so we're not interested in taking
 it until it successfully endures more in-depth testing.
 
-The VirtFS filesystem sharing feature, added in FreeBSD commit
-100353cfbf882e23c911300ebd0cb458bd3ee975, has not been synced into illumos bhyve
-yet.  It depends on the userland lib9p which needs a fair amount of work to
-build and run on illumos. The integration of this feature is being tracked in
-https://www.illumos.org/issues/13380
-
 The stub usr/src/compat/bhyve/stdatomic.h file only includes enough glue
 to satisfy the use of <stdatomic.h> in usr/src/cmd/bhyve/rfb.c, and in
 particular assumes that atomic variables are sized as an int. If other bhyve