name : reload_microcode #! /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