diff options
| author | Matthew Bauer <mjbauer95@gmail.com> | 2020-08-21 23:33:59 -0500 |
|---|---|---|
| committer | Matthew Bauer <mjbauer95@gmail.com> | 2020-08-21 23:42:07 -0500 |
| commit | 47b56e7c19c2e3af685ee408f02f232efb3d12b1 (patch) | |
| tree | c4577e5c11903ca4805d54fba6d45124193e726e | |
| parent | e5a097a8cdeb731d2a2ecf300a0e0609d8d5677b (diff) | |
runInLinuxVM, test-driver: use -cpu max instead of -cpu host
This appears to avoid requiring KVM when it’s not available. This is
what I originally though -cpu host did. Unfortunately not much
documentation available from the QEMU side on this, but this appears
to square with help:
$ qemu-system-x86 -cpu help
...
x86 host KVM processor with all supported host features
x86 max Enables all features supported by the accelerator in the current host
...
Whether we actually want to support this not clear, since this only
happens when your CPU doesn’t have full KVM support. Some Nix builders
are lying about kvm support though. Things aren’t too slow without it
though.
Fixes https://github.com/NixOS/nixpkgs/issues/85394
Alternative to https://github.com/NixOS/nixpkgs/pull/83920
| -rw-r--r-- | nixos/lib/qemu-flags.nix | 4 | ||||
| -rw-r--r-- | nixos/tests/installer.nix | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/nixos/lib/qemu-flags.nix b/nixos/lib/qemu-flags.nix index 0cf6977af4bb..0f0662458935 100644 --- a/nixos/lib/qemu-flags.nix +++ b/nixos/lib/qemu-flags.nix @@ -22,9 +22,9 @@ rec { else throw "Unknown QEMU serial device for system '${pkgs.stdenv.hostPlatform.system}'"; qemuBinary = qemuPkg: { - x86_64-linux = "${qemuPkg}/bin/qemu-kvm -cpu host"; + x86_64-linux = "${qemuPkg}/bin/qemu-kvm -cpu max"; armv7l-linux = "${qemuPkg}/bin/qemu-system-arm -enable-kvm -machine virt -cpu host"; aarch64-linux = "${qemuPkg}/bin/qemu-system-aarch64 -enable-kvm -machine virt,gic-version=host -cpu host"; - x86_64-darwin = "${qemuPkg}/bin/qemu-kvm -cpu host"; + x86_64-darwin = "${qemuPkg}/bin/qemu-kvm -cpu max"; }.${pkgs.stdenv.hostPlatform.system} or "${qemuPkg}/bin/qemu-kvm"; } diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix index 02b839fee3f5..420951eb715c 100644 --- a/nixos/tests/installer.nix +++ b/nixos/tests/installer.nix @@ -74,7 +74,7 @@ let throw "Non-EFI boot methods are only supported on i686 / x86_64" else '' def assemble_qemu_flags(): - flags = "-cpu host" + flags = "-cpu max" ${if system == "x86_64-linux" then ''flags += " -m 768"'' else ''flags += " -m 512 -enable-kvm -machine virt,gic-version=host"'' |