bootloader: make serial console configurable
Currently, the serial console is hardcoded to ttyS0 in the bootloader element. This is a challenge for users that want to build images for some baremetal servers. Supermicro servers, for example, use ttyS1 for the serial over lan interface. This patch adds a new environment variable DIB_BOOTLOADER_SERIAL_CONSOLE that can be set to override the default. Change-Id: Ie8173be8690ac0b7164ce9e5b66d3c1c18f844d6
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@ -16,3 +16,7 @@ Arguments
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* ``DIB_BOOTLOADER_DEFAULT_CMDLINE`` sets parameters that are appended
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to the ``GRUB_CMDLINE_LINUX_DEFAULT`` values in ``grub.cfg``
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configuration. It defaults to ``nofb nomodeset vga=normal``.
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* ``DIB_BOOTLOADER_SERIAL_CONSOLE`` sets the serial device to be
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used as a console. It defaults to ``hvc0`` for PowerPC,
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``ttyAMA0,115200`` for ARM64, otherwise ``ttyS0,115200``.
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@ -1 +1,2 @@
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export DIB_BOOTLOADER_DEFAULT_CMDLINE=${DIB_BOOTLOADER_DEFAULT_CMDLINE:-"nofb nomodeset vga=normal"}
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export DIB_BOOTLOADER_SERIAL_CONSOLE=${DIB_BOOTLOADER_SERIAL_CONSOLE:-""}
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@ -174,8 +174,10 @@ function install_grub2 {
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echo 'GRUB_TERMINAL="serial console"' >>/etc/default/grub
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echo 'GRUB_GFXPAYLOAD_LINUX=auto' >>/etc/default/grub
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# Serial console on Power is hvc0
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if [[ "powerpc ppc64 ppc64le" =~ "$ARCH" ]]; then
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if [[ -n "${DIB_BOOTLOADER_SERIAL_CONSOLE}" ]]; then
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SERIAL_CONSOLE="${DIB_BOOTLOADER_SERIAL_CONSOLE}"
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elif [[ "powerpc ppc64 ppc64le" =~ "$ARCH" ]]; then
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# Serial console on Power is hvc0
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SERIAL_CONSOLE="hvc0"
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elif [[ "arm64" =~ "$ARCH" ]]; then
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SERIAL_CONSOLE="ttyAMA0,115200"
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