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#! /bin/bash -efu

# Trigger microcode reload with additional check for BDW-EP that can have
# microcode reloaded only in case kernel has specific patches.
#
# SPDX-License-Identifier: CC0-1.0

export LC_ALL=C

CHECK_CAVEATS=/usr/libexec/microcode_ctl/check_caveats
IGNORE_HYPERVISOR="/etc/microcode_ctl/ignore-hypervisor-flag"

[ -e "$IGNORE_HYPERVISOR" ] || {
	if grep -q '^flags[[:space:]]*:.* hypervisor\( .*\)\?$' /proc/cpuinfo
	then
		exit 0
	fi
}

"$CHECK_CAVEATS" -m > /dev/null || exit 0

echo 2>/dev/null 1 > /sys/devices/system/cpu/microcode/reload || :

exit 0