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nixos/qemu-vm: Use different serial port on ARM/AArch64

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This commit is contained in:
Tuomas Tynkkynen 2017-11-24 14:31:50 +02:00
parent 0a2eda7a7e
commit e56da6a464
2 changed files with 20 additions and 9 deletions
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22
nixos/modules/testing/test-instrumentation.nix
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@ -5,7 +5,13 @@
with lib;
let kernel = config.boot.kernelPackages.kernel; in
let
kernel = config.boot.kernelPackages.kernel;
# FIXME: figure out a common place for this instead of copy pasting
serialDevice = if pkgs.stdenv.isi686 || pkgs.stdenv.isx86_64 then "ttyS0"
else if pkgs.stdenv.isArm || pkgs.stdenv.isAarch64 then "ttyAMA0"
else throw "Unknown QEMU serial device for system '${pkgs.stdenv.system}'";
in
{
@ -22,8 +28,8 @@ let kernel = config.boot.kernelPackages.kernel; in
systemd.services.backdoor =
{ wantedBy = [ "multi-user.target" ];
requires = [ "dev-hvc0.device" "dev-ttyS0.device" ];
after = [ "dev-hvc0.device" "dev-ttyS0.device" ];
requires = [ "dev-hvc0.device" "dev-${serialDevice}.device" ];
after = [ "dev-hvc0.device" "dev-${serialDevice}.device" ];
script =
''
export USER=root
@ -40,7 +46,7 @@ let kernel = config.boot.kernelPackages.kernel; in
cd /tmp
exec < /dev/hvc0 > /dev/hvc0
while ! exec 2> /dev/ttyS0; do sleep 0.1; done
while ! exec 2> /dev/${serialDevice}; do sleep 0.1; done
echo "connecting to host..." >&2
stty -F /dev/hvc0 raw -echo # prevent nl -> cr/nl conversion
echo
@ -49,10 +55,10 @@ let kernel = config.boot.kernelPackages.kernel; in
serviceConfig.KillSignal = "SIGHUP";
};
# Prevent agetty from being instantiated on ttyS0, since it
# interferes with the backdoor (writes to ttyS0 will randomly fail
# Prevent agetty from being instantiated on ${serialDevice}, since it
# interferes with the backdoor (writes to ${serialDevice} will randomly fail
# with EIO). Likewise for hvc0.
systemd.services."serial-getty@ttyS0".enable = false;
systemd.services."serial-getty@${serialDevice}".enable = false;
systemd.services."serial-getty@hvc0".enable = false;
boot.initrd.preDeviceCommands =
@ -88,7 +94,7 @@ let kernel = config.boot.kernelPackages.kernel; in
# Panic if an error occurs in stage 1 (rather than waiting for
# user intervention).
boot.kernelParams =
[ "console=ttyS0" "panic=1" "boot.panic_on_fail" ];
[ "console=${serialDevice}" "panic=1" "boot.panic_on_fail" ];
# `xwininfo' is used by the test driver to query open windows.
environment.systemPackages = [ pkgs.xorg.xwininfo ];