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From 2050395b053e4813da20f1c3bc39d74a8e45803f Mon Sep 17 00:00:00 2001
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From: Peter Robinson <pbrobinson@gmail.com>
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Date: Thu, 7 Mar 2019 20:57:59 +0000
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Subject: [PATCH] Support legacy MBR (msdos) as part of UEFI to enable hybrid
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builds
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The UEFI spec supports legacy MBR (msdos) in section 5.2 of the UEFI 2.7 spec [1].
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There's a number of use cases where we might boot on a UEFI device but want to
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support, but not by default, the creation of images using legacy MBR partitions.
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One of these use cases is cloud images where we can produce a single image
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tha will run on UEFI supported, including secure-boot, clouds but also
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support AWS which only supports MBR partitioning schemes [2] and in the current
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config anaconda fails the install where this is a perfectly valid and widely
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supported deployment mechanism.
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So enable the ability to use legacy msdos partitioning schemes, but don't use
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it for default installs, so people may consume this mechanism using kickstarts
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rather than having the install fail for a valid use case.
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[1] https://uefi.org/sites/default/files/resources/UEFI%20Spec%202_7_A%20Sept%206.pdf
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[2] https://docs.aws.amazon.com/vm-import/latest/userguide/vmie_prereqs.html
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Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
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---
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blivet/formats/disklabel.py | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/blivet/formats/disklabel.py b/blivet/formats/disklabel.py
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index 75867d6a..8186d1a1 100644
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--- a/blivet/formats/disklabel.py
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+++ b/blivet/formats/disklabel.py
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@@ -228,7 +228,7 @@ def get_platform_label_types(cls):
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elif arch.is_efi() and arch.is_arm():
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label_types = ["msdos", "gpt"]
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elif arch.is_efi() and not arch.is_aarch64():
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- label_types = ["gpt"]
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+ label_types = ["gpt", "msdos"]
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elif arch.is_s390():
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label_types = ["msdos", "dasd"]
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