This implements vhost: a kernel-level backend for virtio,
The main motivation for this work is to reduce virtualization
overhead for virtio by removing system calls on data path,
without guest changes. For virtio-net, this removes up to
4 system calls per packet: vm exit for kick, reentry for kick,
iothread wakeup for packet, interrupt injection for packet.
Some more detailed description attached to the patch itself.
The patches are against 2.6.31-rc4. I'd like them to go into linux-next
and down the road 2.6.32 if possible. Please comment.
Userspace bits using this driver will be posted to kvm at vger shortly.
Michael S. Tsirkin (2):
export cpu_tlbstate to modules
vhost_net: a kernel-level virtio server
MAINTAINERS | 10 +
arch/x86/kvm/Kconfig | 1 +
arch/x86/mm/tlb.c | 1 +
drivers/Makefile | 1 +
drivers/block/virtio_blk.c | 3 +
drivers/vhost/Kconfig | 11 +
drivers/vhost/Makefile | 2 +
drivers/vhost/net.c | 462 ++++++++++++++++++++++++++++++
drivers/vhost/vhost.c | 663 ++++++++++++++++++++++++++++++++++++++++++++
drivers/vhost/vhost.h | 108 +++++++
include/linux/Kbuild | 1 +
include/linux/miscdevice.h | 1 +
include/linux/vhost.h | 100 +++++++
13 files changed, 1364 insertions(+), 0 deletions(-)
create mode 100644 drivers/vhost/Kconfig
create mode 100644 drivers/vhost/Makefile
create mode 100644 drivers/vhost/net.c
create mode 100644 drivers/vhost/vhost.c
create mode 100644 drivers/vhost/vhost.h
create mode 100644 include/linux/vhost.h
