svn commit: r247870 - in head/sys: amd64/conf conf i386/conf

[Bryan Venteicher]

Author: bryanv
Date: Wed Mar  6 07:17:53 2013
New Revision: 247870
URL: http://svnweb.freebsd.org/changeset/base/247870

Log:
  Remove the virtio dependency entry for the VirtIO device drivers. This
  will prevent the kernel from linking if the device driver are included
  without the virtio module. Remove pci and scbus for the same reason.
  
  Also explain the relationship and necessity of the virtio and virtio_pci
  modules. Currently in FreeBSD, we only support VirtIO PCI, but it could
  be replaced with a different interface (like MMIO) and the device
  (network, block, etc) will still function.
  
  Requested by:	luigi
  Approved by:	grehan (mentor)
  MFC after:	3 days

Modified:
  head/sys/amd64/conf/NOTES
  head/sys/conf/files.amd64
  head/sys/conf/files.i386
  head/sys/i386/conf/NOTES

Modified: head/sys/amd64/conf/NOTES
==============================================================================
--- head/sys/amd64/conf/NOTES	Wed Mar  6 06:59:42 2013	(r247869)
+++ head/sys/amd64/conf/NOTES	Wed Mar  6 07:17:53 2013	(r247870)
@@ -442,6 +442,13 @@ options 	SAFE_RNDTEST	# enable rndtest s
 
 #
 # VirtIO support
+#
+# The virtio entry provides a generic bus for use by the device drivers.
+# It must be combined with an interface that communicates with the host.
+# Multiple such interfaces defined by the VirtIO specification. FreeBSD
+# only has support for PCI. Therefore, virtio_pci must be statically
+# compiled in or loaded as a module for the device drivers to function.
+#
 device		virtio		# Generic VirtIO bus (required)
 device		virtio_pci	# VirtIO PCI Interface
 device		vtnet		# VirtIO Ethernet device

Modified: head/sys/conf/files.amd64
==============================================================================
--- head/sys/conf/files.amd64	Wed Mar  6 06:59:42 2013	(r247869)
+++ head/sys/conf/files.amd64	Wed Mar  6 07:17:53 2013	(r247870)
@@ -393,11 +393,11 @@ dev/virtio/virtio.c			optional	virtio
 dev/virtio/virtqueue.c			optional	virtio
 dev/virtio/virtio_bus_if.m		optional	virtio
 dev/virtio/virtio_if.m			optional	virtio
-dev/virtio/pci/virtio_pci.c		optional	virtio_pci virtio pci
-dev/virtio/network/if_vtnet.c		optional	vtnet virtio
-dev/virtio/block/virtio_blk.c		optional	virtio_blk virtio
-dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon virtio
-dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi virtio scbus
+dev/virtio/pci/virtio_pci.c		optional	virtio_pci
+dev/virtio/network/if_vtnet.c		optional	vtnet
+dev/virtio/block/virtio_blk.c		optional	virtio_blk
+dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon
+dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi
 isa/syscons_isa.c		optional	sc
 isa/vga_isa.c			optional	vga
 kern/kern_clocksource.c		standard

Modified: head/sys/conf/files.i386
==============================================================================
--- head/sys/conf/files.i386	Wed Mar  6 06:59:42 2013	(r247869)
+++ head/sys/conf/files.i386	Wed Mar  6 07:17:53 2013	(r247870)
@@ -374,11 +374,11 @@ dev/virtio/virtio.c			optional	virtio
 dev/virtio/virtqueue.c			optional	virtio
 dev/virtio/virtio_bus_if.m		optional	virtio
 dev/virtio/virtio_if.m			optional	virtio
-dev/virtio/pci/virtio_pci.c		optional	virtio_pci virtio pci
-dev/virtio/network/if_vtnet.c		optional	vtnet virtio
-dev/virtio/block/virtio_blk.c		optional	virtio_blk virtio
-dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon virtio
-dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi virtio scbus
+dev/virtio/pci/virtio_pci.c		optional	virtio_pci
+dev/virtio/network/if_vtnet.c		optional	vtnet
+dev/virtio/block/virtio_blk.c		optional	virtio_blk
+dev/virtio/balloon/virtio_balloon.c	optional	virtio_balloon
+dev/virtio/scsi/virtio_scsi.c		optional	virtio_scsi
 i386/acpica/acpi_machdep.c	optional acpi
 acpi_wakecode.o			optional acpi				\
 	dependency	"$S/i386/acpica/acpi_wakecode.S assym.s"	\

Modified: head/sys/i386/conf/NOTES
==============================================================================
--- head/sys/i386/conf/NOTES	Wed Mar  6 06:59:42 2013	(r247869)
+++ head/sys/i386/conf/NOTES	Wed Mar  6 07:17:53 2013	(r247870)
@@ -773,6 +773,13 @@ device		glxsb		# AMD Geode LX Security B
 
 #
 # VirtIO support
+#
+# The virtio entry provides a generic bus for use by the device drivers.
+# It must be combined with an interface that communicates with the host.
+# Multiple such interfaces defined by the VirtIO specification. FreeBSD
+# only has support for PCI. Therefore, virtio_pci must be statically
+# compiled in or loaded as a module for the device drivers to function.
+#
 device		virtio		# Generic VirtIO bus (required)
 device		virtio_pci	# VirtIO PCI Interface
 device		vtnet		# VirtIO Ethernet device