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Commit f87d0fbb authored by Rusty Russell's avatar Rusty Russell
Browse files

vringh: host-side implementation of virtio rings. 



Getting use of virtio rings correct is tricky, and a recent patch saw
an implementation of in-kernel rings (as separate from userspace).

This abstracts the business of dealing with the virtio ring layout
from the access (userspace or direct); to do this, we use function
pointers, which gcc inlines correctly.

Signed-off-by: default avatarRusty Russell <rusty@rustcorp.com.au>
Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 61d0b5a4

drivers/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -123,7 +123,7 @@ obj-$(CONFIG_PPC_PS3) += ps3/ 
obj-$(CONFIG_OF)		+= of/

obj-$(CONFIG_SSB)		+= ssb/

obj-$(CONFIG_BCMA)		+= bcma/

obj-$(CONFIG_VHOST_NET)		+= vhost/

obj-$(CONFIG_VHOST_RING)	+= vhost/

obj-$(CONFIG_VLYNQ)		+= vlynq/

obj-$(CONFIG_STAGING)		+= staging/

obj-y				+= platform/

drivers/vhost/Kconfig

+8 −0
Original line number Diff line number Diff line 
config VHOST_NET

	tristate "Host kernel accelerator for virtio net"

	depends on NET && EVENTFD && (TUN || !TUN) && (MACVTAP || !MACVTAP)

	select VHOST_RING

	---help---

	  This kernel module can be loaded in host kernel to accelerate

	  guest networking with virtio_net. Not to be confused with virtio_net
@@ -12,3 +13,10 @@ config VHOST_NET 
if STAGING

source "drivers/vhost/Kconfig.tcm"

endif



config VHOST_RING

	tristate

	---help---

	  This option is selected by any driver which needs to access

	  the host side of a virtio ring.

drivers/vhost/Kconfig.tcm

+1 −0
Original line number Diff line number Diff line 
config TCM_VHOST

	tristate "TCM_VHOST fabric module"

	depends on TARGET_CORE && EVENTFD && m

	select VHOST_RING

	default n

	---help---

	Say M here to enable the TCM_VHOST fabric module for use with virtio-scsi guests

drivers/vhost/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -2,3 +2,5 @@ obj-$(CONFIG_VHOST_NET) += vhost_net.o 
vhost_net-y := vhost.o net.o



obj-$(CONFIG_TCM_VHOST) += tcm_vhost.o



obj-$(CONFIG_VHOST_RING) += vringh.o

drivers/vhost/vringh.c

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+1007 −0

File added.

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