On Mon, Nov 26, 2018 at 02:20:38PM +0100, Paolo Bonzini wrote: > vhost does not have to be supported only if KVM is present, in fact > vhost-user does not even need any kind of kernel support. This series > changes this. The rationale is that, when vhost-user-test.c will be > converted to qgraph, it will be able to test vhost-user support > for virtio-mmio backend even on x86.
The reason for limiting it to KVM was very simple: it has the same set of problems with ordering as mttcg. So I guess it's fine but I think we must then limit it to when tcg emits fence instructions. Otherwise we'll get subtle race conditions. > Paolo Bonzini (5): > vhost-net: move stubs to a separate file > vhost-net-user: add stubs for when no virtio-net device is present > vhost: restrict Linux dependency to kernel vhost > vhost-net: compile it on all targets that have virtio-net. > vhost-net: revamp configure logic > > backends/Makefile.objs | 5 +-- > configure | 101 > ++++++++++++++++++++++++++++----------------- > default-configs/virtio.mak | 4 +- > hw/net/Makefile.objs | 4 +- > hw/net/vhost_net-stub.c | 95 ++++++++++++++++++++++++++++++++++++++++++ > hw/net/vhost_net.c | 78 ++-------------------------------- > hw/virtio/Makefile.objs | 5 ++- > hw/virtio/vhost-backend.c | 11 ++++- > include/exec/poison.h | 1 - > net/Makefile.objs | 4 +- > net/net.c | 2 +- > net/vhost-user-stub.c | 23 +++++++++++ > tests/Makefile.include | 5 +-- > 13 files changed, 209 insertions(+), 129 deletions(-) > create mode 100644 hw/net/vhost_net-stub.c > create mode 100644 net/vhost-user-stub.c > > -- > 1.8.3.1