Em Wed, 18 Jun 2025 23:16:47 +0900 "Alexandre Courbot" <gnu...@gmail.com> escreveu:
> Hi Mauro, > > On Tue Jun 17, 2025 at 5:49 PM JST, Mauro Carvalho Chehab wrote: > > Hi Alex, > > > > Em Tue, 27 May 2025 23:03:39 +0900 > > Alexandre Courbot <gnu...@gmail.com> escreveu: > > > >> > > > Btw, I was looking at: > >> > > > > >> > > > https://github.com/chromeos/virtio-media > >> > > > > >> > > > (I'm assuming that this is the QEMU counterpart, right?) > >> > > > >> > > crosvm actually, but QEMU support is also being worked on. > >> > > >> > Do you have already QEMU patches? The best is to have the Kernel driver > >> > submitted altogether with QEMU, as Kernel developers need it to do the > >> > tests. In my case, I never use crosvm, and I don't have any Chromebook > >> > anymore. > >> > >> IIRC Albert Esteve was working on this, maybe he can share the current > >> status. > > > > Any news regards to it? > > Albert shared the latest status. There is one in-flight patch series > required in qemu [1], and then this branch of vhost-device should > contain the necessary support [2]. Albert is waiting for the virtio spec > to get merged before sending a pull request IIUC. > > [1] https://patchew.org/QEMU/20250217164012.246727-1-aest...@redhat.com/ > [2] https://github.com/aesteve-rh/vhost-device/tree/virtio-media > > > > >> Note that crosvm does not require a Chromebook, you can build and run > >> it pretty easily on a regular PC. I have put together a document to > >> help with that: > >> > >> https://github.com/chromeos/virtio-media/blob/main/TRY_IT_OUT.md > > > > I started looking on it today. Already installed crossvm (I had to > > install libcap-devel to build it). Still, I'm not familiar with > > crossvm, which is a little be painful. In particular, how can I > > enable network on it and speedup it? > > There is a "./tools/examples/setup_network" in the crosvm repository that > will setup a TAP device. Once this is done, you can pass the "--net > tap-name=crosvm_tap" argument to crosvm, and the network device should > be visible and usable. > > Let me reply to the rest of your questions in your latest mail, with the > most recent logs. Heh, I just managed to get it work maybe 10 minutes before your e-mail... I'm building crossvm with: cargo build --release --features "gpu,media,virgl_renderer,x" To also have GPU working. Network setup required a rather complex script to set it up without breaking my ssh section with the machine where I'm running crossvm. In case you need, I'm enclosing it. Now, I need to allocate another time slot for tests and review. --- #!/bin/bash PHY=enp0s25 BRIDGE=crossvm_br TAP=crossvm_tap IP_MASK=$(ip -br addr show $PHY | awk '{print $3}' | grep -oE '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/[0-9]+') if [ -z "$IP_MASK" ]; then echo "Failed to detect IP address on $PHY. Exiting." exit 1 fi GW=$(ip -br route show default dev $PHY | awk '{print $3}') if [ -z "$GW" ]; then echo "Failed to detect default gateway on $PHY. Exiting." exit 1 fi restore_network() { echo "Restoring original network config on $PHY..." sudo ip link set dev $BRIDGE down || true sudo ip link del $BRIDGE || true sudo ip link set dev $TAP down || true sudo ip tuntap del dev $TAP mode tap || true sudo ip addr flush dev $PHY sudo ip addr add ${IP_MASK} dev $PHY sudo ip link set dev $PHY up sudo ip route add default via $GW } if ! lsmod | grep -q '^bridge'; then sudo modprobe bridge fi trap 'catch $LINENO "$BASH_COMMAND"' ERR catch() { echo "Error on line $1: $2" restore_network exit 1 } if ip link show $TAP &>/dev/null; then echo "Removing existing tap $TAP" sudo ip link set dev $TAP down sudo ip tuntap del dev $TAP mode tap fi if ip link show $BRIDGE &>/dev/null; then echo "Removing existing bridge $BRIDGE" sudo ip link set dev $BRIDGE down sudo ip link del $BRIDGE fi # Create bridge device sudo ip link add name $BRIDGE type bridge sudo ip link set dev $BRIDGE up sudo ip link set dev $BRIDGE type bridge forward_delay 0 # Add physical interface to bridge sudo ip link set dev $PHY master $BRIDGE # Create tap device sudo ip tuntap add dev $TAP mode tap sudo ip link set dev $TAP up # Add tap to bridge sudo ip link set dev $TAP master $BRIDGE # Get an address to the bridge sudo dhclient $BRIDGE # Start crossvm sudo ./crosvm/target/release/crosvm run \ linux/arch/x86/boot/bzImage \ -c 4 -m size=4096 \ --disable-sandbox \ --block debian-12.img \ -p "root=/dev/vda1" \ --v4l2-proxy /dev/video0 \ --gpu backend=virglrenderer \ --net tap-name=crossvm_tap,vhost-net
