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kernel: add vhost-net module

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vhost-net is used to accelerate traffic to virtualisation
guests that use the virtio-net network card in QEMU.

Generally it is invoked by specifying "vhost=on" to a
QEMU -netdev device:

qemu-system-aarch64 -nographic -M virt -cpu host \
        --enable-kvm -bios u-boot.bin -smp 1 -m 2048 \
        -drive file=openwrt-armsr-armv8.img,format=raw,index=0,media=disk \
        -device "virtio-net,netdev=landev,disable-legacy=off,disable-modern=off" \
        -netdev "tap,id=landev,helper=/usr/lib/qemu-bridge-helper --br=br-lan,vhost=on"

Signed-off-by: Mathew McBride <matt@traverse.com.au>
This commit is contained in:
Mathew McBride 2023-08-21 06:10:35 +00:00 committed by Hauke Mehrtens
parent 3210aa8e0a
commit d188db8aed
1 changed files with 24 additions and 0 deletions
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24
package/kernel/linux/modules/virt.mk
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@ -117,3 +117,27 @@ define KernelPackage/vfio-pci/description
endef
$(eval $(call KernelPackage,vfio-pci))
define KernelPackage/vhost
SUBMENU:=Virtualization
TITLE:=Host kernel accelerator for virtio (base)
KCONFIG:=CONFIG_VHOST
FILES:=$(LINUX_DIR)/drivers/vhost/vhost.ko \
$(LINUX_DIR)/drivers/vhost/vhost_iotlb.ko
AUTOLOAD:=$(call AutoProbe,vhost vhost_iotlb)
endef
$(eval $(call KernelPackage,vhost))
define KernelPackage/vhost-net
SUBMENU:=Virtualization
TITLE:=Host kernel accelerator for virtio-net
DEPENDS:=+kmod-tun +kmod-vhost
KCONFIG:=CONFIG_VHOST_NET
FILES:=$(LINUX_DIR)/drivers/vhost/vhost_net.ko
AUTOLOAD:=$(call AutoProbe,vhost_net)
endef
$(eval $(call KernelPackage,vhost-net))