arm64: Enable virtio-net and add network scripts #40
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Enable POSIX timers to support ping’s POSIX timer syscalls: - CONFIG_POSIX_TIMERS=y in configs/linux-arm64.config Enable network stack and virtio-net in kernel config: - CONFIG_NET, CONFIG_INET, CONFIG_IP_MULTICAST, CONFIG_IP_PNP - CONFIG_IP_PNP_DHCP, CONFIG_NETDEVICES, CONFIG_VIRTIO - CONFIG_VIRTIO_NET, CONFIG_VIRTIO_RING, CONFIG_UNIX - CONFIG_UNIX_SCM, CONFIG_AF_UNIX_OOB Add virtio_net_dev to FDT generation: - src/arch/arm64/vm.c: include virtio_net_dev in interrupt-map Define VIRTIO_NET_IRQ=2 (SPI 34) in src/arch/arm64/desc.h Add scripts for host and guest network setup: - scripts/set-host-bridge.sh to configure TAP bridge and default route - scripts/set-guest-route.sh to configure guest static IP and route Update README.md with new scripts and build instructions These changes have been validated on a Raspberry Pi 5 Model B (Revision 1.0) running Ubuntu 25.10 with Linux kernel version 6.14.0.
The previous URL of The Linux/x86 Boot Protocol returned a 404 error due to an incorrect origin. Updated the link to point to the correct resource. References: - The Linux/x86 Boot Protocol: https://www.kernel.org/doc/html/latest/arch/x86/boot.html
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Many thanks to @visitorckw. I rebased the branch, interchanged patches 2 and 3, flagged patch 2 for squashing, and force-pushed the result. Please examine the changes at your convenience. |
README.md
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| @@ -42,8 +44,63 @@ containing concatenated `bootsect.o + setup.o + misc.o + piggy.o`. `initrd` is t | |||
| initial RAM disk image, which is an optional argument. | |||
| `disk-image` is the path to disk image which can be mounted as a block device via virtio. For the reference Linux guest, ext4 filesystem is used for disk image. | |||
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| ### Stop Emulator | |||
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It is meant to "stop" the emulation. Instead, the operation is dedicated to "exit" from the execution loop.
configs/linux-arm64.config
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| CONFIG_UNIX=y | ||
| CONFIG_UNIX_SCM=y | ||
| CONFIG_AF_UNIX_OOB=y |
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Confirm if they are needed or not.
This commit removes the following kernel configuration options in the ARM64 image: - CONFIG_UNIX - CONFIG_UNIX_SCM - CONFIG_AF_UNIX_OOB The updated ARM64 kernel image was tested on a Raspberry Pi 5 Model B (Revision 1.0) running Ubuntu 25.10 with Linux kernel version 6.14.0.
The term “Exit” more accurately reflects that this key sequence terminates the emulator’s execution loop rather than simply pausing or stopping it.
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I’ve removed the unneeded ARM64 kernel configs (CONFIG_UNIX, CONFIG_UNIX_SCM, CONFIG_AF_UNIX_OOB) and renamed “Stop Emulator” to “Exit Emulator” in the README to better reflect its behavior. Please take a look and let me know if everything looks good for merge! |
UpdateThe changes were validated on the NVIDIA Jetson Orin Nano Developer Kit running JetPack 6.2.1 (L4T 36.4.4) with Linux kernel version 5.15.148-tegra. Network functionality within the guest operating system was confirmed to operate correctly. |
README.md
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| 1. Start the kvm-host emulator. Once initialized, the TUN/TAP interface (for example, `tap0`) is visible in the output of `ip a`. The following is sample output from the host: | ||
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| ```shell | ||
| ❯ ip a |
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Use $ for the command line prompt.
README.md
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| 2. Execute the shell script `./scripts/set-host-bridge.sh`, which configures a bridge by assigning the default route to 10.0.0.1, integrating the TUN/TAP interface into the bridge, and activating the network interfaces. The following is sample output of `ip a` from the host: | ||
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| ```shell | ||
| ❯ ip a |
jserv
changed the title
Replaced the ❯ prompt symbol with the conventional $ prompt in the README’s example output for `ip a`, improving consistency and readability.
UpdateI’ve updated the README example to use the standard Also, just a heads-up, the change requested by @visitorckw is no longer applicable, as the commit they referenced was removed by a force‑push.
Let me know if you’d like any further tweaks. Thanks. |
Enable POSIX timers to support ping’s POSIX timer syscalls:
Enable network stack and virtio-net in kernel config:
Add virtio_net_dev to FDT generation:
Define VIRTIO_NET_IRQ=2 (SPI 34) in src/arch/arm64/desc.h
Add scripts for host and guest network setup:
Update README.md with new scripts and build instructions
These changes have been validated on both a Raspberry Pi 5 Model B
(Revision 1.0) running Ubuntu 25.10 with Linux kernel 6.14.0 and an
NVIDIA Jetson Orin Nano Developer Kit running JetPack 6.2.1
(L4T 36.4.4) with Linux kernel 5.15.148-tegra.