Hi,
I had a similar issue. However I could keep using VirtIO when I disabled hardware checksum offloading and hardware TCP segmentation offloading.
As I read somewhere on the FreeBSD mailinglists there is currently an issue using a virtual FreeBSD with VirtIO and hardware checksum offloading on KVM.
Until I read this I was using Intel e1000 as a virtual NIC however these are really slow.
Maybe this works for you.
I had a similar issue. However I could keep using VirtIO when I disabled hardware checksum offloading and hardware TCP segmentation offloading.
As I read somewhere on the FreeBSD mailinglists there is currently an issue using a virtual FreeBSD with VirtIO and hardware checksum offloading on KVM.
Until I read this I was using Intel e1000 as a virtual NIC however these are really slow.
Maybe this works for you.