вс, 23 янв. 2022 г. в 07:51, 李士林 <lslboyfut...@icloud.com>:
> Hi: > I develop a custom os use qemu and use macos as host, I use the net > argument '-net nic,model=pcnet -net > tap,ifname=tap0,script=no,downscript=no’ when run the qemu-system-i386,then > I can get the network device in my custom os: > > Please notice that `-net` is a legacy option https://wiki.qemu.org/Documentation/Networking#The_legacy_-net_option > pci_device_dump: vendor id: 0x1022 > pci_device_dump: device id: 0x2000 > pci_device_dump: class code: 0x20000 > pci_device_dump: revision id: 0x10 > pci_device_dump: multi function: 0 > pci_device_dump: card bus CIS pointer: 0 > pci_device_dump: subsystem vendor id: 0 > pci_device_dump: subsystem device id: 0 > pci_device_dump: expansion ROM base address: feb80000 > pci_device_dump: capability list pointer: 0 > pci_device_dump: irq line: 11 > pci_device_dump: irq pin: 1 > pci_device_dump: min Gnt: 6 > pci_device_dump: max Lat: 255 > pci_device_dump: bar 0: > pci_device_bar_dump: type: io base address > pci_device_bar_dump: base address: c000 > pci_device_bar_dump: len: 20 > pci_device_dump: bar 1: > pci_device_bar_dump: type: mem base address > pci_device_bar_dump: base address: febd1000 > pci_device_bar_dump: len: 20 > > I can send a message to the host from my custom os in qemu, but can’t > receive a message from the host. > > This is known issue: https://gitlab.com/qemu-project/qemu/-/issues/335 > so I rebuild the qemu use this patch, then I use the argument '-netdev > vmnet-bridged,id=vmnet,ifname=en0’ run the qemu-system-i386 again, this > time, I can’t get the network device either, I don’t know why, how to use > vmnet-bridged to send message to host from my custom os and receive a > message from the host, what should I do? thanks a lot! It's normal behavior since you've specified a network backend only. See the corresponding QEMU documentation section: https://wiki.qemu.org/Documentation/Networking#Network_Backends Currently you have: `-netdev vmnet-bridged,id=vmnet,ifname=en0` You need add a device: `-netdev vmnet-bridged,id=vmnet,ifname=en0 -device pcnet,netdev=vmnet` Supported devices can be listed with -device help: `qemu-system-xxx -device help` -- Best Regards, Vladislav Yaroshchuk
