peter/spectre-meltdown-checker
peter/spectre-meltdown-checker
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chore: speed optimization of hw check and indentation fixes

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This commit is contained in:
Stéphane Lesimple 2018-09-24 20:05:41 +02:00
parent 90c2ae5de2
commit dc5402b349
1 changed files with 20 additions and 23 deletions
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43
spectre-meltdown-checker.sh
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@ -851,7 +851,7 @@ pvulnstatus()
case "$opt_batch_format" in
text) _echo 0 "$1: $2 ($3)";;
short) short_output="${short_output}$1 ";;
short) short_output="${short_output}$1 ";;
json)
case "$2" in
UNK) is_vuln="null";;
@ -1334,10 +1334,9 @@ is_ucode_blacklisted()
do
model=$(echo $tuple | cut -d, -f1)
stepping=$(( $(echo $tuple | cut -d, -f2) ))
ucode=$(echo $tuple | cut -d, -f3)
echo "$ucode" | grep -q ^0x && ucode_decimal=$(( ucode ))
if [ "$cpu_model" = "$model" ] && [ "$cpu_stepping" = "$stepping" ]; then
if [ "$cpu_ucode" = "$ucode_decimal" ] || [ "$cpu_ucode" = "$ucode" ]; then
ucode=$(( $(echo $tuple | cut -d, -f3) ))
if [ "$cpu_ucode" = "$ucode" ]; then
_debug "is_ucode_blacklisted: we have a match! ($cpu_model/$cpu_stepping/$cpu_ucode)"
return 0
fi
@ -1352,7 +1351,7 @@ is_skylake_cpu()
# is this a skylake cpu?
# return 0 if yes, 1 otherwise
#if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
# boot_cpu_data.x86 == 6) {
# boot_cpu_data.x86 == 6) {
# switch (boot_cpu_data.x86_model) {
# case INTEL_FAM6_SKYLAKE_MOBILE:
# case INTEL_FAM6_SKYLAKE_DESKTOP:
@ -1410,26 +1409,24 @@ is_latest_known_ucode()
# 0: yes, 1: no, 2: unknown
parse_cpu_details
ucode_latest="latest microcode version for your CPU model is unknown"
if ! is_intel && ! is_amd; then
# cpuid,version,date
if is_intel; then
cpu_brand_prefix=I
elif is_amd; then
cpu_brand_prefix=A
else
return 2
fi
# cpuid,version,date
for tuple in $(read_mcedb)
for tuple in $(read_mcedb | grep "$(printf "^$cpu_brand_prefix,0x%08X," "$cpu_cpuid")")
do
cpu_brand=$( echo "$tuple" | cut -d, -f1)
is_intel && [ "$cpu_brand" != I ] && continue
is_amd && [ "$cpu_brand" != A ] && continue
cpuid_decimal=$(( $(echo "$tuple" | cut -d, -f2) ))
ucode_decimal=$(( $(echo "$tuple" | cut -d, -f3) ))
ucode_date=$( echo "$tuple" | cut -d, -f4)
if [ "$cpuid_decimal" = "$cpu_cpuid" ]; then
_debug "is_latest_known_ucode: with cpuid $cpu_cpuid has ucode $cpu_ucode, last known is $cpuid_decimal from $ucode_date"
ucode_latest=$(printf "latest version is 0x%x dated $ucode_date according to $mcedb_info" "$ucode_decimal")
if [ "$cpu_ucode" -ge "$ucode_decimal" ]; then
return 0
else
return 1
fi
ucode=$(( $(echo "$tuple" | cut -d, -f3) ))
ucode_date=$(echo "$tuple" | cut -d, -f4 | sed -r 's=(....)(..)(..)=\1/\2/\3=')
_debug "is_latest_known_ucode: with cpuid $cpu_cpuid has ucode $cpu_ucode, last known is $ucode from $ucode_date"
ucode_latest=$(printf "latest version is 0x%x dated $ucode_date according to $mcedb_info" "$ucode")
if [ "$cpu_ucode" -ge "$ucode" ]; then
return 0
else
return 1
fi
done
_debug "is_latest_known_ucode: this cpuid is not referenced ($cpu_cpuid)"
@ -1637,7 +1634,7 @@ if [ -e "$opt_kernel" ]; then
if ! which "${opt_arch_prefix}readelf" >/dev/null 2>&1; then
_debug "readelf not found"
kernel_err="missing '${opt_arch_prefix}readelf' tool, please install it, usually it's in the 'binutils' package"
elif [ "$opt_sysfs_only" = 1 ]; then
elif [ "$opt_sysfs_only" = 1 ] || [ "$opt_hw_only" = 1 ]; then
kernel_err='kernel image decompression skipped'
else
extract_kernel "$opt_kernel"