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FMO-77: Modify microvm qemu into fmo-qemu (#90)
- Add functionality to read pci passthrough information from a config file during runtime instead of prebuilt nix config - Comments with "FMO" is one that modified compared to upstream microvm - Remove microvm.devices as it is now unused Signed-off-by: Anh Huy Bui <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,111 @@ | ||
| { pkgs | ||
| , microvmConfig | ||
| , toplevel | ||
| , ghafOS | ||
| }: | ||
|
|
||
| let | ||
| inherit (pkgs) lib; | ||
|
|
||
| inherit (import "${ghafOS.inputs.microvm}/lib" { nixpkgs-lib = lib; }) createVolumesScript makeMacvtap; | ||
| inherit (makeMacvtap { | ||
| inherit microvmConfig hypervisorConfig; | ||
| }) openMacvtapFds macvtapFds; | ||
|
|
||
| hypervisorConfig = import (./qemu.nix) { | ||
| inherit pkgs microvmConfig macvtapFds; | ||
| }; | ||
|
|
||
| inherit (hypervisorConfig) command canShutdown shutdownCommand; | ||
| supportsNotifySocket = hypervisorConfig.supportsNotifySocket or false; | ||
| preStart = hypervisorConfig.preStart or microvmConfig.preStart; | ||
| tapMultiQueue = hypervisorConfig.tapMultiQueue or false; | ||
|
|
||
| execArg = lib.optionalString microvmConfig.prettyProcnames | ||
| ''-a "microvm@${microvmConfig.hostName}"''; | ||
|
|
||
| # FMO: Use command in an array format | ||
| runScriptBin = pkgs.writeShellScriptBin "microvm-run" '' | ||
| ${preStart} | ||
| ${createVolumesScript pkgs.buildPackages microvmConfig.volumes} | ||
| ${lib.optionalString (hypervisorConfig.requiresMacvtapAsFds or false) openMacvtapFds} | ||
| CMD=(${command}) | ||
| exec ${execArg} "''${CMD[@]}" | ||
| ''; | ||
|
|
||
| shutdownScriptBin = pkgs.writeShellScriptBin "microvm-shutdown" '' | ||
| ${shutdownCommand} | ||
| ''; | ||
|
|
||
| balloonScriptBin = pkgs.writeShellScriptBin "microvm-balloon" '' | ||
| set -e | ||
| if [ -z "$1" ]; then | ||
| echo "Usage: $0 <balloon-size-mb>" | ||
| exit 1 | ||
| fi | ||
| SIZE=$1 | ||
| ${hypervisorConfig.setBalloonScript} | ||
| ''; | ||
| in | ||
|
|
||
| pkgs.buildPackages.runCommand "microvm-${microvmConfig.hypervisor}-${microvmConfig.hostName}" | ||
| { | ||
| # for `nix run` | ||
| meta.mainProgram = "microvm-run"; | ||
| passthru = { | ||
| inherit canShutdown supportsNotifySocket; | ||
| inherit (microvmConfig) hypervisor; | ||
| }; | ||
| } '' | ||
| mkdir -p $out/bin | ||
| ln -s ${runScriptBin}/bin/microvm-run $out/bin/microvm-run | ||
| ${if canShutdown | ||
| then "ln -s ${shutdownScriptBin}/bin/microvm-shutdown $out/bin/microvm-shutdown" | ||
| else ""} | ||
| ${lib.optionalString ((hypervisorConfig.setBalloonScript or null) != null) '' | ||
| ln -s ${balloonScriptBin}/bin/microvm-balloon $out/bin/microvm-balloon | ||
| ''} | ||
| mkdir -p $out/share/microvm | ||
| ln -s ${toplevel} $out/share/microvm/system | ||
| echo vnet_hdr > $out/share/microvm/tap-flags | ||
| ${lib.optionalString tapMultiQueue '' | ||
| echo multi_queue >> $out/share/microvm/tap-flags | ||
| ''} | ||
| ${lib.concatMapStringsSep " " (interface: | ||
| lib.optionalString (interface.type == "tap" && interface ? id) '' | ||
| echo "${interface.id}" >> $out/share/microvm/tap-interfaces | ||
| '') microvmConfig.interfaces} | ||
| ${lib.concatMapStringsSep " " (interface: | ||
| lib.optionalString ( | ||
| interface.type == "macvtap" && | ||
| interface ? id && | ||
| (interface.macvtap.link or null) != null && | ||
| (interface.macvtap.mode or null) != null | ||
| ) '' | ||
| echo "${builtins.concatStringsSep " " [ | ||
| interface.id | ||
| interface.mac | ||
| interface.macvtap.link | ||
| (builtins.toString interface.macvtap.mode) | ||
| ]}" >> $out/share/microvm/macvtap-interfaces | ||
| '') microvmConfig.interfaces} | ||
| ${lib.concatMapStrings ({ tag, socket, source, proto, ... }: | ||
| lib.optionalString (proto == "virtiofs") '' | ||
| mkdir -p $out/share/microvm/virtiofs/${tag} | ||
| echo "${socket}" > $out/share/microvm/virtiofs/${tag}/socket | ||
| echo "${source}" > $out/share/microvm/virtiofs/${tag}/source | ||
| '' | ||
| ) microvmConfig.shares} | ||
| ${pkgs.coreutils}/bin/ln -s ${microvmConfig.pciConfigPath} $out/share/microvm/pci-devices | ||
| '' |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| # Copyright 2022-2024 TII (SSRC) and the Ghaf contributors | ||
| # SPDX-License-Identifier: Apache-2.0 | ||
| {pkgs, microvmConfig}: | ||
| # FMO: A helper function to generate pci passthrough options in the qemu command | ||
| pkgs.writeShellScriptBin "pci-passthrough-options" '' | ||
| pciDevices=$(cat ${microvmConfig.pciConfigPath}) | ||
| for device in $pciDevices; do | ||
| echo -n "-device vfio-pci,host=$device,multifunction=on " | ||
| done | ||
| '' |
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