support USB ethernet in bordervm
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55387b0ee3
commit
b70c8ee258
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@ -1,7 +1,7 @@
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{ config, pkgs, lib, ... }:
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let
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cfg = config.bordervm;
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inherit (lib) mkOption mdDoc types;
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inherit (lib) mkOption mkEnableOption mdDoc types optional optionals;
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in {
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options.bordervm = {
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l2tp = {
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@ -22,14 +22,28 @@ in {
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};
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};
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ethernet = {
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pciId = mkOption {
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description = ''
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Host PCI ID (as shown by `lspci`) of the ethernet adaptor
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to be used by the VM. This uses VFIO and requires setup
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on the emulation host before it will work!
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'';
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type = types.str;
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example = "04:00.0";
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pci = {
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enable = mkEnableOption "passthru PCI ethernet";
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id = mkOption {
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description = ''
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Host PCI ID (as shown by `lspci`) of the ethernet adaptor
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to be used by the VM. This uses VFIO and requires setup
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on the emulation host before it will work!
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'';
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type = types.str;
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example = "04:00.0";
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};
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};
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usb = {
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enable = mkEnableOption "passthru USB ethernet";
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vendor = mkOption {
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type = types.str;
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example = "0x0bda";
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};
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product = mkOption {
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type = types.str;
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example = "0x8153";
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};
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};
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};
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};
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@ -66,11 +80,16 @@ in {
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virtualisation = {
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qemu = {
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networkingOptions = [];
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options = [
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"-device vfio-pci,host=${cfg.ethernet.pciId}"
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"-nographic"
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"-serial mon:stdio"
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];
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options = [] ++
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optional cfg.ethernet.pci.enable
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"-device vfio-pci,host=${cfg.ethernet.pci.id}" ++
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optionals cfg.ethernet.usb.enable [
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"-device usb-ehci,id=ehci"
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"-device usb-host,bus=ehci.0,vendorid=${cfg.ethernet.usb.vendor},productid=${cfg.ethernet.usb.product}"
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] ++ [
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"-nographic"
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"-serial mon:stdio"
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];
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};
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sharedDirectories = {
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liminix = {
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@ -1,7 +1,8 @@
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{...}:
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{
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bordervm = {
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ethernet.pciId = "01:00.0";
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# ethernet.pci = { id = "01:00.0"; enable = true; };
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ethernet.usb = { vendor = "0x0bda"; product = "0x8153"; enable = true; };
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l2tp = {
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host = "l2tp.aa.net.uk";
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};
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@ -139,11 +139,13 @@ router from the internet so you can borrow the cable/fibre/DSL.
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``bordervm`` is included for this purpose. You will need
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* a Linux machine with a spare PCI ethernet card which you can dedicate to Liminix
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* a Linux machine with a spare (PCI or USB) ethernet device which you can dedicate to Liminix
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* an L2TP service such as https://www.aa.net.uk/broadband/l2tp-service/
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You need to configure the Ethernet card for VFIO passthru, then
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You need to "hide" the Ethernet device from the host - for PCI this
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means configuring it for VFIO passthru; for USB you need to
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unload the module(s) it uses. Then
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you can execute :command:`run-border-vm` in a ``buildEnv`` shell,
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which starts up QEMU using the NixOS configuration in
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:file:`bordervm-configuration.nix`.
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