Add UEFI support (#236)

* OVMF

Dockerfile

@@ -16,6 +16,7 @@ RUN apt-get update && apt-get -y upgrade && \
 	netcat-openbsd \
 	qemu-system-x86 \
 	qemu-utils \
+	ovmf \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 

src/boot.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+# Docker environment variables
+
+: ${BOOT_MODE:='legacy'}  # Display type
+
+case "${BOOT_MODE,,}" in
+  uefi)
+    BOOT_OPTS="-bios /usr/share/OVMF/OVMF_CODE.fd"
+    ;;
+  legacy)
+    BOOT_OPTS=""
+    ;;
+  *)
+    info "Unknown boot mode '${BOOT_MODE}', defaulting to 'legacy'"
+    BOOT_OPTS=""
+    ;;
+esac
+
+return 0

src/config.sh

@@ -28,7 +28,7 @@ MAC_OPTS="-machine type=q35,usb=off,dump-guest-core=off,hpet=off${KVM_OPTS}"
 SERIAL_OPTS="-serial mon:stdio -device virtio-serial-pci,id=virtio-serial0,bus=pcie.0,addr=0x3"
 EXTRA_OPTS="-device virtio-balloon-pci,id=balloon0 -object rng-random,id=rng0,filename=/dev/urandom -device virtio-rng-pci,rng=rng0"
 
-ARGS="$DEF_OPTS $CPU_OPTS $RAM_OPTS $MAC_OPTS $SERIAL_OPTS $NET_OPTS $DISK_OPTS $DISPLAY_OPTS $EXTRA_OPTS $ARGUMENTS"
+ARGS="$DEF_OPTS $CPU_OPTS $RAM_OPTS $MAC_OPTS $SERIAL_OPTS $NET_OPTS $DISK_OPTS $DISPLAY_OPTS $BOOT_OPTS $EXTRA_OPTS $ARGUMENTS"
 ARGS=$(echo "$ARGS" | sed 's/\t/ /g' | tr -s ' ')
 
 return 0

src/display.sh

@@ -13,3 +13,5 @@ case "${DISPLAY,,}" in
     DISPLAY_OPTS="-nographic -display none"
     ;;
 esac
+
+return 0

src/entry.sh

@@ -11,6 +11,7 @@ cd /run
 . disk.sh       # Initialize disks
 . display.sh    # Initialize display
 . network.sh    # Initialize network
+. boot.sh       # Configure boot
 . config.sh     # Configure arguments
 
 trap - ERR