On Fri, Jul 24, 2020 at 2:25 PM Yifei Jiang <jiangyifei@xxxxxxxxxx> wrote: > > Hi, > > These two patches enable support for vhost-net on RISC-V architecture. They are developed > based on the Linux source in this repo: https://github.com/avpatel/linux, > the branch is riscv_kvm_v13. > > The accompanying QEMU is from the repo: https://github.com/alistair23/qemu, the branch is > hyp-ext-v0.6.next. In order for the QEMU to work with KVM, the patch found here is necessary: > https://patchwork.kernel.org/cover/11435965/ > > Several steps to use this: > > 1. create virbr0 on riscv64 emulation > $ brctl addbr virbr0 > $ brctl stp virbr0 on > $ ifconfig virbr0 up > $ ifconfig virbr0 <virbr0_ip> netmask <virbr0_netmask> > > 2. boot riscv64 guestOS on riscv64 emulation > $ ./qemu-system-riscv64 -M virt,accel=kvm -m 1024M -cpu host -nographic \ > -name guest=riscv-guest \ > -smp 2 \ > -kernel ./Image \ > -drive file=./guest.img,format=raw,id=hd0 \ > -device virtio-blk,drive=hd0 \ > -netdev type=tap,vhost=on,script=./ifup.sh,downscript=./ifdown.sh,id=net0 \ > -append "root=/dev/vda rw console=ttyS0 earlycon=sbi" > > $ cat ifup.sh > #!/bin/sh > brctl addif virbr0 $1 > ifconfig $1 up > > $ cat ifdown.sh > #!/bin/sh > ifconfig $1 down > brctl delif virbr0 $1 > > This brenchmark is vhost-net compare with virtio: > > $ ./netperf -H <virbr0_ip> -l 100 -t TCP_STREAM > > vhost-net: > Recv Send Send > Socket Socket Message Elapsed > Size Size Size Time Throughput > bytes bytes bytes secs. 10^6bits/sec > > 131072 16384 16384 100.07 457.55 > > virtio: > Recv Send Send > Socket Socket Message Elapsed > Size Size Size Time Throughput > bytes bytes bytes secs. 10^6bits/sec > > 131072 16384 16384 100.07 227.02 > > > The next step is to support irqfd on RISC-V architecture. > > Yifei Jiang (2): > RISC-V: KVM: enable ioeventfd capability and compile for risc-v > RISC-V: KVM: read\write kernel mmio device support > > arch/riscv/kvm/Kconfig | 2 ++ > arch/riscv/kvm/Makefile | 2 +- > arch/riscv/kvm/vcpu_exit.c | 38 ++++++++++++++++++++++++++++++++------ > arch/riscv/kvm/vm.c | 1 + > 4 files changed, 36 insertions(+), 7 deletions(-) > > -- > 2.19.1 > > I will be squashing these patches into PATCH7 of v14 KVM RISC-V series. I will also add your Signed-off-by to PATCH7 of v14 KVM RISC-V to acknowledge your efforts. Thanks, Anup
