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114 lines
4.0 KiB
114 lines
4.0 KiB
#! /bin/bash -efux |
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# Generator of RPM "Provides:" tags for Intel microcode files. |
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# |
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# SPDX-License-Identifier: CC0-1.0 |
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IFS=$'\n' |
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UPDATED="intel-beta" |
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CODENAMES="codenames" |
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if [ "$#" -ge 1 ]; then |
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CODENAMES="$1" |
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shift |
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fi |
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# Match only FF-MM-SS ucode files under intel-ucode/intel-ucode-with-caveats |
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# directories. |
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for f in $(grep -E '/intel-ucode.*/[0-9a-f][0-9a-f]-[0-9a-f][0-9a-f]-[0-9a-f][0-9a-f]$'); do |
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ucode=$(basename "$f") |
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ucode_caveat="$(basename "$(dirname "$(dirname "$f")")")" |
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ucode_fname="$ucode_caveat/$ucode" |
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file_sz="$(stat -c "%s" "$f")" |
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skip=0 |
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while :; do |
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[ "$skip" -lt "$file_sz" ] || break |
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# Microcode header format description: |
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# https://gitlab.com/iucode-tool/iucode-tool/blob/master/intel_microcode.c |
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IFS=' ' read hdrver rev \ |
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date_y date_d date_m \ |
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cpuid cksum ldrver \ |
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pf_mask datasz totalsz <<- EOF |
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$(dd if="$f" bs=1 skip="$skip" count=36 status=none \ |
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| hexdump -e '"" 1/4 "%u " 1/4 "%#x " \ |
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1/2 "%04x " 1/1 "%02x " 1/1 "%02x " \ |
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1/4 "%08x " 1/4 "%x " 1/4 "%#x " \ |
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1/4 "%u " 1/4 "%u " 1/4 "%u" "\n"') |
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EOF |
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[ 0 != "$datasz" ] || datasz=2000 |
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[ 0 != "$totalsz" ] || totalsz=2048 |
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# TODO: add some sanity/safety checks here. As of now, there's |
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# a (pretty fragile) assumption that all the matched files |
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# are valid Intel microcode files in the expected format. |
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skip=$((skip + totalsz)) |
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#[ -n "$rev" ] || continue |
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# Basic "Provides:" tag. Everything else is bells and whistles. |
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# It's possible that microcode files for different platform_id's |
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# and the same CPUID have the same version, that's why "sort -u" |
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# in the end. |
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printf "firmware(intel-ucode/%s) = %s\n" "$ucode" "$rev" |
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# Generate extended "Provides:" tags with additional |
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# information, which allow more precise matching. |
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printf "iucode_date(fname:%s;cpuid:%s;pf_mask:0x%x) = %s.%s.%s\n" \ |
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"$ucode_fname" "$cpuid" "$pf_mask" "$date_y" "$date_m" "$date_d" |
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printf "iucode_rev(fname:%s;cpuid:%s;pf_mask:0x%x) = %s\n" \ |
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"$ucode_fname" "$cpuid" "$pf_mask" "$rev" |
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# Generate tags for each possible platform_id |
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_pf=1 |
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_pf_mask="$pf_mask" |
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while [ 0 -lt "$_pf_mask" ]; do |
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[ 1 -ne "$((_pf_mask % 2))" ] || \ |
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# We try to provide a more specific firmware() |
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# dependency here. It has incorrect file name, |
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# but allows constructing a required RPM |
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# capability name by (directly) using |
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# the contents of /proc/cpuinfo and |
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# /sys/devices/system/cpu/cpu*/microcode/processor_flags |
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# (except for a Deschutes CPU with sig 0x1632) |
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printf "iucode_rev(fname:%s;platform_id:0x%x) = %s\n" \ |
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"$ucode_fname" "$_pf" "$rev" |
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_pf_mask=$((_pf_mask / 2)) |
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_pf=$((_pf * 2)) |
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done |
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# Generate tags with codename information, in case |
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# it is available |
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cpuid_up="$(echo "$cpuid" | tr 'a-z' 'A-Z')" |
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if [ -e "$CODENAMES" ]; then |
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grep ' '"$cpuid_up"' ' "$CODENAMES" \ |
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| while IFS=$'\t' read segm int_fname codename stepping candidate_pf rest; do |
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codename=$(echo "$codename" | tr ' (),' '_[];') |
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candidate_pf=$(printf "%u" "0x${candidate_pf}") |
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[ \( 0 -ne "$pf_mask" \) -a \ |
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\( "$candidate_pf" -ne "$((candidate_pf & pf_mask))" \) ] || { \ |
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printf "iucode_rev(fname:%s;cpuid:%s;pf_mask:0x%x;segment:\"%s\";codename:\"%s\";stepping:\"%s\";pf_model:0x%x) = %s\n" \ |
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"$ucode_fname" "$cpuid" "$pf_mask" \ |
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"$segm" "$codename" "$stepping" "$candidate_pf" \ |
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"$rev"; |
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printf "iucode_date(fname:%s;cpuid:%s;pf_mask:0x%x;segment:\"%s\";codename:\"%s\";stepping:\"%s\";pf_model:0x%x) = %s.%s.%s\n" \ |
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"$ucode_fname" "$cpuid" "$pf_mask" \ |
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"$segm" "$codename" "$stepping" "$candidate_pf" \ |
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"$date_y" "$date_m" "$date_d"; |
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} |
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done |
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fi |
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# Kludge squared: generate additional "Provides:" tags |
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# for the files in the overrides tarball (that a placed |
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# in a separate caveat with a specific name) |
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[ "x${ucode_caveat}" != "x${UPDATED}" ] || { |
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printf "firmware_updated(intel-ucode/%s) = %s\n" \ |
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"$ucode" "$rev"; |
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} |
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done |
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done | sort -u
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