diff options
Diffstat (limited to 'nixos/modules/virtualisation/qemu-vm.nix')
| -rw-r--r-- | nixos/modules/virtualisation/qemu-vm.nix | 52 |
1 files changed, 38 insertions, 14 deletions
diff --git a/nixos/modules/virtualisation/qemu-vm.nix b/nixos/modules/virtualisation/qemu-vm.nix index 42e43f5ee02..d9935bcafb7 100644 --- a/nixos/modules/virtualisation/qemu-vm.nix +++ b/nixos/modules/virtualisation/qemu-vm.nix @@ -7,17 +7,18 @@ # the VM in the host. On the other hand, the root filesystem is a # read/writable disk image persistent across VM reboots. -{ config, lib, pkgs, ... }: +{ config, lib, pkgs, options, ... }: with lib; with import ../../lib/qemu-flags.nix { inherit pkgs; }; let - qemu = config.system.build.qemu or pkgs.qemu_test; cfg = config.virtualisation; + qemu = cfg.qemu.package; + consoles = lib.concatMapStringsSep " " (c: "console=${c}") cfg.qemu.consoles; driveOpts = { ... }: { @@ -135,10 +136,8 @@ let cp ${bootDisk}/efi-vars.fd "$NIX_EFI_VARS" || exit 1 chmod 0644 "$NIX_EFI_VARS" || exit 1 fi - '' else '' - ''} - '' else '' - ''} + '' else ""} + '' else ""} cd $TMPDIR idx=0 @@ -186,10 +185,9 @@ let efiVars=$out/efi-vars.fd cp ${efiVarsDefault} $efiVars chmod 0644 $efiVars - '' else '' - ''} + '' else ""} ''; - buildInputs = [ pkgs.utillinux ]; + buildInputs = [ pkgs.util-linux ]; QEMU_OPTS = "-nographic -serial stdio -monitor none" + lib.optionalString cfg.useEFIBoot ( " -drive if=pflash,format=raw,unit=0,readonly=on,file=${efiFirmware}" @@ -268,6 +266,8 @@ in options = { + virtualisation.fileSystems = options.fileSystems; + virtualisation.memorySize = mkOption { default = 384; @@ -277,6 +277,18 @@ in ''; }; + virtualisation.msize = + mkOption { + default = null; + type = types.nullOr types.ints.unsigned; + description = + '' + msize (maximum packet size) option passed to 9p file systems, in + bytes. Increasing this should increase performance significantly, + at the cost of higher RAM usage. + ''; + }; + virtualisation.diskSize = mkOption { default = 512; @@ -401,6 +413,14 @@ in }; virtualisation.qemu = { + package = + mkOption { + type = types.package; + default = pkgs.qemu; + example = "pkgs.qemu_test"; + description = "QEMU package to use."; + }; + options = mkOption { type = types.listOf types.unspecified; @@ -653,11 +673,12 @@ in # attribute should be disregarded for the purpose of building a VM # test image (since those filesystems don't exist in the VM). fileSystems = mkVMOverride ( + cfg.fileSystems // { "/".device = cfg.bootDevice; ${if cfg.writableStore then "/nix/.ro-store" else "/nix/store"} = { device = "store"; fsType = "9p"; - options = [ "trans=virtio" "version=9p2000.L" "cache=loose" ]; + options = [ "trans=virtio" "version=9p2000.L" "cache=loose" ] ++ lib.optional (cfg.msize != null) "msize=${toString cfg.msize}"; neededForBoot = true; }; "/tmp" = mkIf config.boot.tmpOnTmpfs @@ -670,13 +691,13 @@ in "/tmp/xchg" = { device = "xchg"; fsType = "9p"; - options = [ "trans=virtio" "version=9p2000.L" ]; + options = [ "trans=virtio" "version=9p2000.L" ] ++ lib.optional (cfg.msize != null) "msize=${toString cfg.msize}"; neededForBoot = true; }; "/tmp/shared" = { device = "shared"; fsType = "9p"; - options = [ "trans=virtio" "version=9p2000.L" ]; + options = [ "trans=virtio" "version=9p2000.L" ] ++ lib.optional (cfg.msize != null) "msize=${toString cfg.msize}"; neededForBoot = true; }; } // optionalAttrs (cfg.writableStore && cfg.writableStoreUseTmpfs) @@ -735,16 +756,19 @@ in (isEnabled "VIRTIO_PCI") (isEnabled "VIRTIO_NET") (isEnabled "EXT4_FS") + (isEnabled "NET_9P_VIRTIO") + (isEnabled "9P_FS") (isYes "BLK_DEV") (isYes "PCI") - (isYes "EXPERIMENTAL") (isYes "NETDEVICES") (isYes "NET_CORE") (isYes "INET") (isYes "NETWORK_FILESYSTEMS") - ] ++ optional (!cfg.graphics) [ + ] ++ optionals (!cfg.graphics) [ (isYes "SERIAL_8250_CONSOLE") (isYes "SERIAL_8250") + ] ++ optionals (cfg.writableStore) [ + (isEnabled "OVERLAY_FS") ]; }; |