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#!/bin/bash # Hack in additional firmware directories for supported caveats. # # SPDX-License-Identifier: CC0-1.0 check() { return 0 } install() { local FW_DIR=/lib/firmware local DATA_DIR=/usr/share/microcode_ctl/ucode_with_caveats local CFG_DIR="/etc/microcode_ctl/ucode_with_caveats" local check_caveats=/usr/libexec/microcode_ctl/check_caveats local fw_path_para=$(< /sys/module/firmware_class/parameters/path) local verbose_opt local cc_out local path local ignored local do_skip_host_only local p verbose_opt= [ 4 -gt "$stdloglvl" ] || verbose_opt="-v" # HACK: we override external fw_dir variable in order to get # an additional ucode based on the kernel version. dinfo " microcode_ctl module: mangling fw_dir" [ -z "$fw_dir_l" ] || { dinfo " microcode_ctl: avoid touching fw_dir as" \ "it has been changed (fw_dir_l is '$fw_dir_l')" return 0 } # Reset fw_dir to avoid inclusion of kernel-version-specific directories # populated with microcode for the late load, only in case it is set # to the default value to avoid meddling with user-enforced changes. # The second variant has been introduced in dracut-057~5. [ \( "x$fw_dir" != \ "x/lib/firmware/updates /lib/firmware /lib/firmware/$kernel" \) -a \ \( "x$fw_dir" != \ "x${fw_path_para:+$fw_path_para }/lib/firmware/updates/$kernel /lib/firmware/updates /lib/firmware/$kernel /lib/firmware" \) ] || { fw_dir="/lib/firmware/updates /lib/firmware" dinfo " microcode_ctl: reset fw_dir to \"${fw_dir}\"" } fw_dir_add="" while read -d $'\n' -r i; do dinfo " microcode_ctl: processing data directory " \ "\"$DATA_DIR/$i\"..." if [ "x" != "x$hostonly" ]; then do_skip_host_only=0 local sho_overrides=" $CFG_DIR/skip-host-only-check $CFG_DIR/skip-host-only-check-$i $FW_DIR/$kernel/skip-host-only-check $FW_DIR/$kernel/skip-host-only-check-$i" for p in $(echo "$sho_overrides"); do [ -e "$p" ] || continue do_skip_host_only=1 dinfo " microcode_ctl: $i; skipping" \ "Host-Only check, since \"$p\" exists." break done else do_skip_host_only=1 fi match_model_opt="" [ 1 = "$do_skip_host_only" ] || match_model_opt="-m" if ! cc_out=$($check_caveats -e -k "$kernel" -c "$i" \ $verbose_opt $match_model_opt) then dinfo " microcode_ctl: kernel version \"$kernel\"" \ "failed early load check for \"$i\", skipping" continue fi path=$(printf "%s" "$cc_out" | sed -n 's/^paths //p') [ -n "$path" ] || { ignored=$(printf "%s" "$cc_out" | \ sed -n 's/^skip_cfgs //p') if [ -n "$ignored" ]; then dinfo " microcode_ctl: configuration" \ "\"$i\" is ignored" else dinfo " microcode_ctl: no microcode paths" \ "are associated with \"$i\", skipping" fi continue } dinfo " microcode_ctl: $i: caveats check for kernel" \ "version \"$kernel\" passed, adding" \ "\"$DATA_DIR/$i\" to fw_dir variable" if [ 0 -eq "$do_skip_host_only" ]; then fw_dir_add="$DATA_DIR/$i " else fw_dir_add="$DATA_DIR/$i $fw_dir_add" fi # The list of directories is reverse-sorted in order to preserve the # "last wins" policy in case of presence of multiple microcode # revisions. # # In case of hostonly == 0, all microcode revisions will be included, # but since the microcode search is done with the "first wins" policy # by the (early) microcode loading code, the correct microcode revision # still has to be picked. # # Note that dracut without patch [1] puts only the last directory # in the early cpio; we try to address this by putting only the last # matching caveat in the search path, but that workaround works only # for host-only mode; non-host-only mode early cpio generation is still # broken without that patch. # # [1] https://github.com/dracutdevs/dracut/commit/c44d2252bb4b done <<-EOF $(find "$DATA_DIR" -maxdepth 1 -mindepth 1 -type d -printf "%f\n" \ | LC_ALL=C sort) EOF fw_dir="${fw_dir_add}${fw_dir}" dinfo " microcode_ctl: final fw_dir: \"${fw_dir}\"" }
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