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99-grub-mkconfig: Disable BLS usage for Xen machines

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PV and PVH Xen DomU guests boot with pygrub that doesn't have BLS support.
Also Xen Dom0 use the menuentries from 20_linux_xen and not the ones from
10_linux. So BLS support needs to be disabled for both Xen Dom0 and DomU
and use a traditional grub.cfg file generated by the grub2-mkconfig tool.

Resolves: rhbz#1703700

Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>
Tested-by: Steven Haigh <netwiz@crc.id.au>
This commit is contained in:
Javier Martinez Canillas 2019-10-09 11:11:56 +02:00
parent 7ea6052755
commit 897e388763
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GPG key ID: C751E590D63F3D69
1 changed files with 23 additions and 3 deletions
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26
99-grub-mkconfig.install
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@ -4,10 +4,30 @@ if ! [[ $KERNEL_INSTALL_MACHINE_ID ]]; then
exit 0
fi
ARCH=$(uname -m)
# PV and PVH Xen DomU guests boot with pygrub that doesn't have BLS support,
# also Xen Dom0 use the menuentries from 20_linux_xen and not the ones from
# 10_linux. So BLS support needs to be disabled for both Xen Dom0 and DomU.
if [[ -e /sys/hypervisor/type ]] && grep -q "^xen$" /sys/hypervisor/type; then
RUN_MKCONFIG=true
DISABLE_BLS=true
fi
# Is only needed for ppc64* since we can't assume a BLS capable bootloader there
if [[ $ARCH != "ppc64" && $ARCH != "ppc64le" ]]; then
ARCH=$(uname -m)
# Older ppc64le OPAL firmware don't have BLS support so grub2-mkconfig has to
# be run to generate a GRUB config file that contains menuentry commands.
if [[ $ARCH = "ppc64le" ]]; then
RUN_MKCONFIG=true
fi
if [[ $DISABLE_BLS = "true" ]]; then
if grep -q '^GRUB_ENABLE_BLSCFG="*true"*\s*$' /etc/default/grub; then
sed -i 's/^GRUB_ENABLE_BLSCFG=.*/GRUB_ENABLE_BLSCFG=false/' /etc/default/grub
fi
fi
# A traditional grub configuration file needs to be generated only in the case when
# the bootloaders are not capable of populating a menu entry from the BLS fragments.
if [[ $RUN_MKCONFIG != "true" ]]; then
exit 0
fi