Revonzy Mini Shell
#! /bin/bash -eu
# Script for checking various microcode caveats
#
#
# SPDX-License-Identifier: CC0-1.0
export LC_ALL=C
: ${MC_CAVEATS_DATA_DIR=/usr/share/microcode_ctl/ucode_with_caveats}
: ${FW_DIR=/lib/firmware}
: ${CFG_DIR=/etc/microcode_ctl/ucode_with_caveats}
MAX_NESTING_LEVEL=8
usage() {
echo 'Usage: check_caveats [-d] [-e] [-k TARGET_KVER] [-c CONFIG]'
echo ' [-m] [-v]'
echo
echo ' -d - enables disclaimer printing mode'
echo ' -e - check for early microcode load possibility (instead of'
echo ' late microcode load)'
echo ' -k - target version to check against, $(uname -r) is used'
echo ' otherwise'
echo ' -c - caveat config(s) to check, all configs are checked'
echo ' otherwise'
echo ' -m - check that caveats actually apply to the current model'
echo ' -v - verbose output'
echo
echo 'Environment:'
echo ' MC_CAVEATS_DATA_DIR - directory that contains caveats'
echo ' configuration data'
}
debug() { [ 0 = "$verbose" ] || echo "$*" >&2; }
# A simplified RPM version comparison that takes into account knowledge about
# Y- and Z-streams (so it compares versions inside Y-stram or Z-stream if
# the version against which comparison is performed has appropriate versioning
# scheme).
#
# $1 - kernel version to check
# $* - list of kernel versions to check against
check_kver()
{
local t_major= t_minor= t_patch= t_y= t_z1= t_z2= t_rest=
local m_major= m_minor= m_patch= m_y= m_z1= m_z2= m_rest=
local cmp_type=
# IFS=.- read -r t_major t_minor t_patch t_y t_z1 t_z2 t_rest <<<"$1"
# "cannot create temp file for here-document: Read-only file system"
# that's why we can't have nice things.
t_major=${1%%.*}
t_rest=${1#${t_major}}
t_rest=${t_rest#.}
t_minor=${t_rest%%.*}
t_rest=${t_rest#${t_minor}}
t_rest=${t_rest#.}
t_patch=${t_rest%%-*}
t_rest=${t_rest#${t_patch}}
t_rest=${t_rest#-}
t_y=${t_rest%%.*}
t_rest=${t_rest#${t_y}}
t_rest=${t_rest#.}
t_z1=${t_rest%%.*}
t_rest=${t_rest#${t_z1}}
t_rest=${t_rest#.}
t_z2=${t_rest%%.*}
# minor/major/patch/y should be numeric
[ -n "${t_major##*[!0-9]*}" ] || return 1
[ -n "${t_minor##*[!0-9]*}" ] || return 1
[ -n "${t_patch##*[!0-9]*}" ] || return 1
[ -n "${t_y##*[!0-9]*}" ] || return 1
# reset z1/z2 to zero if non-numeric
[ -n "${t_z1##*[!0-9]*}" ] || t_z1=0
[ -n "${t_z2##*[!0-9]*}" ] || t_z2=0
while [ 1 -lt "$#" ]; do
cmp_type=upstream
shift
m_major=${1%%.*}
m_rest=${1#${m_major}}
m_rest=${m_rest#.}
m_minor=${m_rest%%.*}
m_rest=${m_rest#${m_minor}}
m_rest=${m_rest#.}
m_patch=${m_rest%%-*}
m_rest=${m_rest#${m_patch}}
m_rest=${m_rest#-}
m_y=${m_rest%%.*}
m_rest=${m_rest#${m_y}}
m_rest=${m_rest#.}
m_z1=${m_rest%%.*}
m_rest=${m_rest#${m_z1}}
m_rest=${m_rest#.}
m_z2=${m_rest%%.*}
# minor/major/patch should be numeric
[ -n "${m_major##*[!0-9]*}" ] || continue
[ -n "${m_minor##*[!0-9]*}" ] || continue
[ -n "${m_patch##*[!0-9]*}" ] || continue
# reset z1/z2 to zero if non-numeric
[ -n "${m_y##*[!0-9]*}" ] && cmp_type=y || m_y=0
[ -n "${m_z1##*[!0-9]*}" ] && cmp_type=z || m_z1=0
[ -n "${m_z2##*[!0-9]*}" ] && cmp_type=z || m_z2=0
# Comparing versions
case "$cmp_type" in
upstream)
[ "$t_major" -ge "$m_major" ] || continue
[ "$t_minor" -ge "$m_minor" ] || continue
[ "$t_patch" -ge "$m_patch" ] || continue
return 0
;;
y)
[ "$t_major" -eq "$m_major" ] || continue
[ "$t_minor" -eq "$m_minor" ] || continue
[ "$t_patch" -eq "$m_patch" ] || continue
[ "$t_y" -ge "$m_y" ] || continue
return 0
;;
z)
[ "$t_major" -eq "$m_major" ] || continue
[ "$t_minor" -eq "$m_minor" ] || continue
[ "$t_patch" -eq "$m_patch" ] || continue
[ "$t_y" -eq "$m_y" ] || continue
[ "$t_z1" -ge "$m_z1" ] || continue
[ "$t_z2" -ge "$m_z2" ] || continue
return 0
;;
esac
done
return 1
}
# It is needed for SKX[1] for which different product segments
# are differentiated by a value in the CAPID0 field of PCU registers
# device[2].
# [1] https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files/issues/21
# [2] https://www.intel.com/content/dam/www/public/us/en/documents/specification-updates/xeon-scalable-spec-update.pdf#page=13
#
# $1 - params in config file, space-separated, in key=value form:
# domain=* - PCI domain, '*' or number
# bus=* - PCI bus, '*' or number
# device=* - PCI device, '*' or number
# function=* - PCI function, '*' or number
# vid= - PCI vendor ID, empty or number
# did= - PCI device ID, empty or number
# offset=0 - offset in configuration space
# size=4 - field size
# mask=0 - mask applied to the data read
# val=0 - comma-separated list of possible values
# mode=success-any [ success-ail, fail-any, fail-all ] - matching mode:
# success-any: Returns 0 if there was at least one match, otherwise 1.
# success-all: Returns 0 if there was at least one device checked and all
# the checked devices have matches, otherwise 1.
# fail-any: Returns 1 if there was at least one match, otherwise 0.
# fail-all: Returns 1 if there was at least one device checked and all
# the checked devices have matches, otherwise 0.
# $2 - whether model filter is engaged (if it is not '1', just return the result
# based on "mode" value that assumes that there were 0 checks/0 matches).
check_pci_config_val()
{
local domain='*' bus='*' device='*' func='*' vid= did=
local offset=0 size=4 mask=0 val=0 mode=success-any
local checked=0 matched=0 path=''
local dev_path dev_vid dev_did dev_val
local opts="${1:-}"
local match_model="${2:-0}"
set -- $1
while [ "$#" -gt 0 ]; do
[ "x${1#domain=}" = "x${1}" ] || domain="${1#domain=}"
[ "x${1#bus=}" = "x${1}" ] || bus="${1#bus=}"
[ "x${1#device=}" = "x${1}" ] || device="${1#device=}"
[ "x${1#function=}" = "x${1}" ] || func="${1#function=}"
[ "x${1#vid=}" = "x${1}" ] || vid="${1#vid=}"
[ "x${1#did=}" = "x${1}" ] || did="${1#did=}"
[ "x${1#offset=}" = "x${1}" ] || offset="${1#offset=}"
[ "x${1#size=}" = "x${1}" ] || size="${1#size=}"
[ "x${1#mask=}" = "x${1}" ] || mask="${1#mask=}"
[ "x${1#val=}" = "x${1}" ] || val="${1#val=}"
[ "x${1#mode=}" = "x${1}" ] || mode="${1#mode=}"
shift
done
path="$domain"
if [ "x$bus" = 'x*' ]; then
path="$path:$bus";
else
path=$(printf '%s:%02x' "$path" "$bus")
fi
if [ "x$device" = 'x*' ]; then
path="$path:$device";
else
path=$(printf '%s:%02x' "$path" "$device")
fi
if [ "x$func" = 'x*' ]; then
path="$path.$func";
else
path=$(printf '%s.%01x' "$path" "$func")
fi
# Normalise VID, DID
[ -n "$vid" ] || vid="$(printf '0x%04x' "$vid")"
[ -n "$did" ] || did="$(printf '0x%04x' "$did")"
( [ 1 != "$match_model" ] \
|| /usr/bin/find /sys/bus/pci/devices/ -maxdepth 1 -name "$path" \
|| : ) | (
while read -r dev_path; do
# Filter VID, DID
if [ -n "$vid" ]; then
dev_vid=$(/bin/cat "$dev_path/vendor")
[ "x$vid" = "x$dev_vid" ] || continue
fi
if [ -n "$did" ]; then
dev_did=$(/bin/cat "$dev_path/device")
[ "x$did" = "x$dev_did" ] || continue
fi
checked="$((checked + 1))"
dev_val="$(/usr/bin/od -j "$offset" -N "$size" -A n \
-t "u$size" "$dev_path/config")"
val_rest="${val}"
while :; do
cur_val="${val_rest%%,*}"
if [ "$((dev_val & mask))" = "$((cur_val & mask))" ]
then
matched="$((matched + 1))"
break
fi
[ "x${val_rest}" != "x${val_rest#*,}" ] || break
val_rest="${val_rest#*,}"
done
case "$mode" in
success-any) [ "$matched" -eq 0 ] || { echo 0; exit; } ;;
success-all) [ "$matched" -eq "$checked" ] || { echo 1; exit; } ;;
fail-any) [ "$matched" -eq 0 ] || { echo 1; exit; } ;;
fail-all) [ "$matched" -eq "$checked" ] || { echo 0; exit; } ;;
*) echo 2; exit;;
esac
done
debug "PCI config value check ($opts): checked $checked," \
"matched $matched (model check is set to $match_model)"
case "$mode" in
success-any) if [ "$matched" -eq 0 ]; then echo 1; else echo 0; fi ;;
success-all) if [ "$matched" -gt 0 -a "$matched" -eq "$checked" ]; then echo 0; else echo 1; fi ;;
fail-any) if [ "$matched" -eq 0 ]; then echo 0; else echo 1; fi ;;
fail-all) if [ "$matched" -gt 0 -a "$matched" -eq "$checked" ]; then echo 1; else echo 0; fi ;;
*) echo 2; exit;;
esac
)
}
# It is needed for filtering by BIOS vendor name that is available in DMI data
#
# $1 - params in config file, space-separated, in key=value form:
# key= - DMI data record to check. Can be one of the following: bios_date,
# bios_vendor, bios_version, board_asset_tag, board_name, board_serial,
# board_vendor, board_version, chassis_asset_tag, chassis_serial,
# chassis_type, chassis_vendor, chassis_version, product_family,
# product_name, product_serial, product_uuid, product_version,
# sys_vendor.
# val= - a string to match DMI data against. Can be enclosed in single
# or double quotes.
# keyval= - a string of format "KEY(!)?[=:]VAL" (so, one of "KEY=VAL",
# "KEY!=VAL", "KEY:VAL", "KEY!:VAL") that allows providing
# a key-value pair in a single parameter. It is possible to provide
# multiple keyval= parameters. "!" before :/= means negated match.
# The action supplied in the mode= parameter is executed upon
# successful (non-)matching of all the keyval pairs (as well
# as the pair provided in a pair of key= and val= parameters).
# mode=success-equal [ success-equal, fail-equal ] - matching mode:
# success-equal: Returns 0 if the all values present in the corresponding
# files under /sys/devices/virtual/dmi/id/<KEY> are equal
# (or not equal in case of a keyval= with negated match)
# to the respective values supplied as the values
# of the keyval= parameters or the pair of key= vand val=
# parameters, otherwise 1.
# fail-equal: Returns 1 if all the values present in DMI files in sysfs
# match (as described above), otherwise 0.
# no-model-mode=success [ success, fail ] - return value if model filter
# is not enabled:
# success: Return 0.
# fail: Return 1.
# $2 - whether model filter is engaged (if it is not '1', just return the result
# based on "no-model-mode" value).
check_dmi_val()
{
local key= val= keyval= keyvals= mode='success-equal' nm_mode='success'
local opts="${1:-}" opt= opt_=
local match_model="${2:-0}"
local valid_keys=" bios_date bios_vendor bios_version board_asset_tag board_name board_serial board_vendor board_version chassis_asset_tag chassis_serial chassis_type chassis_vendor chassis_version product_family product_name product_serial product_uuid product_version sys_vendor "
local success=1
while [ -n "$opts" ]; do
opt="${opts%%[ ]*}"
[ -n "${opt}" ] || { opts="${opts#[ ]}"; continue; }
[ "x${opt#key=}" = "x${opt}" ] || key="${opt#key=}"
[ "x${opt#mode=}" = "x${opt}" ] || mode="${opt#mode=}"
[ "x${opt#no-model-mode=}" = "x${opt}" ] || \
nm_mode="${opt#no-model-mode=}"
# Handle possible quoting
[ "x${opt#val=}" = "x${opt}" ] || {
case "${opt#val=}" in
[\']*) opt_="${opts#val=\'}"; val="${opt_%%\'*}"; opt="val='${val}'" ;;
[\"]*) opt_="${opts#val=\"}"; val="${opt_%%\"*}"; opt="val=\"${val}\"" ;;
*) val="${opt#val=}" ;;
esac
}
[ "x${opt#keyval=}" = "x${opt}" ] || {
case "${opt#keyval=}" in
[\']*)
opt_="${opts#keyval=\'}"
keyval="${opt_%%\'*}"
opt="keyval='${keyval}'"
keyvals="${keyvals}
${keyval}"
;;
[\"]*)
opt_="${opts#keyval=\"}"
keyval="${opt_%%\"*}"
opt="keyval=\"${keyval}\""
keyvals="${keyvals}
${keyval}"
;;
*)
keyvals="${keyvals}
${opt#keyval=}"
;;
esac
}
opts="${opts#"${opt}"}"
continue
done
[ -z "$key" -a -z "$val" ] || keyvals="${key}=${val}${keyvals}"
[ -n "x${keyvals}" ] || {
debug "Neither key=, val=, nor keyval= parameters were privoded"
echo 2
return
}
[ 1 = "$match_model" ] || {
case "$nm_mode" in
success) echo 0 ;;
fail) echo 1 ;;
*)
debug "Invalid no-model-mode value: \"${nm_mode}\""
echo 2
;;
esac
return
}
case "$mode" in
success-equal|fail-equal) ;;
*) debug "Invalid mode value: \"${nm_mode}\""; echo 2; return ;;
esac
printf "%s\n" "${keyvals}" | (
while read l; do
[ -n "$l" ] || continue
key="${l%%[=:]*}"
val="${l#${key}[=:]}"
cmp="="
[ "x${key%!}" = "x${key}" ] || {
cmp="!="
key="${key%!}"
}
# Check key for validity
[ "x${valid_keys#* ${key} *}" != "x${valid_keys}" ] || {
debug "Invalid \"key\" parameter value: \"${key}\""
echo 2
return
}
[ -r "/sys/devices/virtual/dmi/id/${key}" ] || {
debug "Can't access /sys/devices/virtual/dmi/id/${key}"
echo 3
return
}
file_val="$(/bin/cat "/sys/devices/virtual/dmi/id/${key}")"
[ "x${val}" "${cmp}" "x${file_val}" ] || {
case "$mode" in
success-equal) echo 1 ;;
fail-equal) echo 0 ;;
esac
return
}
done
case "$mode" in
success-equal) echo 0 ;;
fail-equal) echo 1 ;;
esac
)
}
# check_dependency CURLEVEL DEP_TYPE DEP_NAME OPTS
# DEP_TYPE:
# required - caveat can be enabled only if dependency is enabled
# (is not forcefully disabled and meets caveat conditions)
# OPTS:
# match-model-mode=same [ on, off, same ] - what mode matching mode is to be used for dependency
# skip=skip [ fail, skip, success ]
# force-skip=skip [ fail, skip, success ]
# nesting-too-deep=fail [ fail, skip, success ]
# Return values:
# 0 - success
# 1 - fail
# 2 - skip
# 9 - error
check_dependency()
{
local cur_level="$1"
local dep_type="$2"
local dep_name="$3"
local match_model_mode=same old_match_model="${match_model}"
local skip=skip
local force_skip=skip
local nesting_too_deep=fail
local check="Dependency check for ${dep_type} ${dep_name}"
set -- ${4:-}
while [ "$#" -gt 0 ]; do
[ "x${1#match-model-mode=}" = "x${1}" ] || match_model_mode="${1#match-model-mode=}"
[ "x${1#skip=}" = "x${1}" ] || skip="${1#skip=}"
[ "x${1#force-skip=}" = "x${1}" ] || force_skip="${1#force-skip=}"
[ "x${1#nesting-too-deep=}" = "x${1}" ] || nesting_too_deep="${1#nesting-too-deep=}"
shift
done
case "${dep_type}" in
required)
[ "x${dep_name%/*}" = "x${dep_name}" ] || {
debug "${check} error: dependency name (${dep_name})" \
"cannot contain slashes"
echo 9
return
}
[ "${MAX_NESTING_LEVEL}" -ge "$cur_level" ] || {
local reason="nesting level is too deep (${cur_level}) and nesting-too-deep='${nesting_too_deep}'"
case "$nesting_too_deep" in
success) debug "${check} succeeded: ${reason}"; echo 0 ;;
fail) debug "${check} failed: ${reason}"; echo 1 ;;
skip) debug "${check} skipped: ${reason}"; echo 2 ;;
*) debug "${check} error: invalid" \
"nesting-too-deep mode" \
"(${nesting_too_deep})"; echo 9 ;;
esac
return
}
case "${match_model_mode}" in
same) ;;
on) match_model=1 ;;
off) match_model=0 ;;
*)
debug "${check} error: invalid match-model-mode" \
"(${match_model_mode})"
echo 9
return
;;
esac
local result=0
debug "${check}: calling check_caveat '${dep_name}'" \
"'$(($cur_level + 1))' match_model=${match_model}"
check_caveat "${dep_name}" "$(($cur_level + 1))" > /dev/null || result="$?"
match_model="${old_match_model}"
case "${result}" in
0) debug "${check} succeeded: result=${result}"; echo "${result}" ;;
1) debug "${check} failed: result=${result}"; echo "${result}" ;;
2)
local reason="result=${result} and skip='${skip}'"
case "${skip}" in
success) debug "${check} succeeded: ${reason}"; echo 0 ;;
fail) debug "${check} failed: ${reason}"; echo 1 ;;
skip) debug "${check} skipped: ${reason}"; echo 2 ;;
*) debug "${check} error: unexpected skip=" \
"setting (${skip})"; echo 9 ;;
esac
;;
3)
local reason="result=${result} and force_skip='${force_skip}'"
case "${force_skip}" in
success) debug "${check} succeeded: ${reason}"; echo 0 ;;
fail) debug "${check} failed: ${reason}"; echo 1 ;;
skip) debug "${check} skipped: ${reason}"; echo 2 ;;
*) debug "${check} error: unexpected force-skip=" \
"setting (${skip})"; echo 9 ;;
esac
;;
*)
debug "${check} error: unexpected check_caveat result" \
"(${result})"; echo 9 ;;
esac
;;
*)
debug "${check} error: unknown dependency type '${dep_type}'"
echo 9
;;
esac
}
# Provides model in format "VENDOR_ID FAMILY-MODEL-STEPPING"
#
# We check only the first processor as we don't expect non-symmetrical setups
# with CPUs with caveats
get_model_string()
{
/usr/bin/printf "%s %02x-%02x-%02x" \
$(/bin/sed -rn '1,/^$/{
s/^vendor_id[[:space:]]*: (.*)$/\1/p;
s/^cpu family[[:space:]]*: (.*)$/\1/p;
s/^model[[:space:]]*: (.*)$/\1/p;
s/^stepping[[:space:]]*: (.*)$/\1/p;
}' /proc/cpuinfo)
}
get_model_name()
{
/bin/sed -rn '1,/^$/s/^model name[[:space:]]*: (.*)$/\1/p' /proc/cpuinfo
}
get_vendor_id()
{
/bin/sed -rn '1,/^$/s/^vendor_id[[:space:]]*: (.*)$/\1/p' /proc/cpuinfo
}
get_mc_path()
{
case "$1" in
GenuineIntel)
echo "intel-ucode/$2"
;;
AuthenticAMD)
echo "amd-ucode/$2"
;;
*)
# We actually only support Intel ucode, but things may break
# if nothing is printed (input would be gotten from stdin
# otherwise).
echo "invalid"
;;
esac
}
get_mc_ver()
{
/bin/sed -rn '1,/^$/s/^microcode[[:space:]]*: (.*)$/\1/p' /proc/cpuinfo
}
match_model=0
configs=
kver=$(/bin/uname -r)
verbose=0
early_check=0
print_disclaimers=0
ret=0
while getopts "dek:c:mv" opt; do
case "${opt}" in
d)
print_disclaimers=1
early_check=2
;;
e)
early_check=1
;;
k)
kver="$OPTARG"
;;
c)
configs="$configs $OPTARG"
;;
m)
match_model=1
;;
v)
verbose=1
;;
*)
usage
exit 1;
;;
esac
done
: "${configs:=$(find "${MC_CAVEATS_DATA_DIR}" -maxdepth 1 -mindepth 1 -type d -printf "%f\n")}"
cpu_model=$(get_model_string)
cpu_model_name=$(get_model_name)
cpu_vendor=$(get_vendor_id)
ret_paths=""
ok_paths=""
fail_paths=""
ret_cfgs=""
ok_cfgs=""
fail_cfgs=""
skip_cfgs=""
if [ 1 -eq "$early_check" ]; then
stage="early"
else
stage="late"
fi
# check_caveat CFG [CHECK_LEVEL]
# changes ret_paths, ok_paths, fail_paths, ret_cfgs, ok_cfgs, fail_cfgs,
# skip_cfgs if CHECK_LEVEL is set to 0 (default).
# CHECK_LEVEL is used for recursive configuration dependency checks,
# and indicates nesting level.
# Return value:
# 0 - check is successful
# 1 - check has been failed
# 2 - configuration has been skipped
# 3 - configuration has been skipped due to presence of an override file
check_caveat() {
local cfg="$1"
local check_level="${2:-0}"
local dir="$MC_CAVEATS_DATA_DIR/$cfg"
[ -r "${dir}/readme" ] || {
debug "File 'readme' in ${dir} is not found, skipping"
return 2
}
[ -r "${dir}/config" ] || {
debug "File 'config' in ${dir} is not found, skipping"
return 2
}
local cfg_model=
local cfg_vendor=
local cfg_path=
local cfg_kvers=
local cfg_kvers_early=
local cfg_mc_min_ver_late=
local cfg_disable=
local cfg_pci=
local cfg_dmi=
local cfg_dependency=
local key
local value
while read -r key value; do
case "$key" in
model)
cfg_model="$value"
;;
vendor)
cfg_vendor="$value"
;;
path)
cfg_path="$cfg_path $value"
;;
kernel)
cfg_kvers="$cfg_kvers $value"
;;
kernel_early)
cfg_kvers_early="$cfg_kvers_early $value"
;;
mc_min_ver_late)
cfg_mc_min_ver_late="$value"
;;
disable)
cfg_disable="$cfg_disable $value "
;;
pci_config_val)
cfg_pci="$cfg_pci
$value"
;;
dmi)
cfg_dmi="$cfg_dmi
$value"
;;
dependency)
cfg_dependency="$cfg_dependency
$value"
;;
'#'*|'')
continue
;;
*)
debug "Unknown key '$key' (value '$value') in config" \
"'$cfg'"
;;
esac
done < "${dir}/config"
debug "${cfg}: model '$cfg_model', path '$cfg_path', kvers '$cfg_kvers'"
echo "$cfg_path"
# Check for override files in the following order:
# - disallow early/late specific caveat for specific kernel
# - force early/late specific caveat for specific kernel
# - disallow specific caveat for specific kernel
# - force specific caveat for specific kernel
#
# - disallow early/late specific caveat for any kernel
# - disallow early/late any caveat for specific kernel
# - force early/late specific caveat for any kernel
# - force early/late any caveat for specific kernel
# - disallow specific caveat for any kernel
# - disallow any caveat for specific kernel
# - force specific caveat for any kernel
# - force any caveat for specific kernel
#
# - disallow early/late everything
# - force early/late everyhting
# - disallow everything
# - force everyhting
local ignore_cfg=0
local force_cfg=0
local override_file=""
local overrides="
0:$FW_DIR/$kver/disallow-$stage-$cfg
1:$FW_DIR/$kver/force-$stage-$cfg
0:$FW_DIR/$kver/disallow-$cfg
1:$FW_DIR/$kver/force-$cfg
0:$FW_DIR/$kver/disallow-$stage
0:$CFG_DIR/disallow-$stage-$cfg
1:$FW_DIR/$kver/force-$stage
1:$CFG_DIR/force-$stage-$cfg
0:$FW_DIR/$kver/disallow
0:$CFG_DIR/disallow-$cfg
1:$FW_DIR/$kver/force
1:$CFG_DIR/force-$cfg
0:$CFG_DIR/disallow-$stage
1:$CFG_DIR/force-$stage
0:$CFG_DIR/disallow
1:$CFG_DIR/force"
local o
local o_force
local override_file
for o in $(echo "$overrides"); do
o_force=${o%%:*}
override_file=${o#$o_force:}
[ -e "$override_file" ] || continue
if [ 0 -eq "$o_force" ]; then
ignore_cfg=1
else
force_cfg=1
fi
break
done
[ 0 -eq "$ignore_cfg" ] || {
debug "Configuration \"$cfg\" is ignored due to presence of" \
"\"$override_file\"."
return 3
}
# Check model if model filter is enabled
if [ 1 -eq "$match_model" -a -n "$cfg_model" ]; then
[ "x$cpu_model" = "x$cfg_model" ] || {
debug "Current CPU model '$cpu_model' doesn't" \
"match configuration CPU model '$cfg_model'," \
"skipping"
return 2
}
fi
# Check paths if model filter is enabled
local cpu_mc_path
local cfg_mc_present
if [ 1 -eq "$match_model" -a -n "$cfg_path" ]; then
cpu_mc_path="$MC_CAVEATS_DATA_DIR/$cfg/$(get_mc_path \
"$cpu_vendor" "${cpu_model#* }")"
cfg_mc_present=0
for p in $(printf "%s" "$cfg_path"); do
/usr/bin/find "$MC_CAVEATS_DATA_DIR/$cfg" \
-path "$MC_CAVEATS_DATA_DIR/$cfg/$p" -print0 \
| /bin/grep -zFxc "$cpu_mc_path" > /dev/null \
|| continue
cfg_mc_present=1
break
done
[ 1 = "$cfg_mc_present" ] || {
debug "No matching microcode files in '$cfg_path'" \
"for CPU model '$cpu_model', skipping"
return 2
}
fi
# Check vendor if model filter is enabled
if [ 1 -eq "$match_model" -a -n "$cfg_vendor" ]; then
[ "x$cpu_vendor" = "x$cfg_vendor" ] || {
debug "Current CPU vendor '$cpu_vendor' doesn't" \
"match configuration CPU vendor '$cfg_vendor'," \
"skipping"
return 2
}
fi
# Has to be performed before dependency checks
[ 0 -eq "$force_cfg" ] || {
debug "Checks for configuration \"$cfg\" are ignored due to" \
"presence of \"$override_file\"."
return 0
}
# Check dependencies
# It has to be performed here (before adding configuration
# to $ret_cfgs/$ret_paths) since it may be skipped.
if [ -n "$cfg_dependency" ]; then
dep_line="$(printf "%s\n" "$cfg_dependency" | \
while read -r dep_type dep_name dep_opts
do
[ -n "$dep_type" ] || continue
dep_res=$(check_dependency "$check_level" \
"$dep_type" \
"$dep_name" \
"$dep_opts")
[ 0 != "$dep_res" ] || continue
echo "$dep_res $dep_type $dep_name $dep_opts"
break
done
echo "0 ")"
case "${dep_line%% *}" in
0) ;;
2)
debug "Dependency check '${dep_line#* }'" \
"induced configuration skip"
return 2
;;
*)
debug "Dependency check '${dep_line#* }'" \
"failed (with return code ${dep_line%% *})"
return 1
;;
esac
fi
# Check configuration files
[ "x${cfg_disable%%* $stage *}" = "x$cfg_disable" ] || {
debug "${cfg}: caveat is disabled in configuration"
return 1
}
# Check late load kernel version
if [ 1 -ne "$early_check" -a -n "$cfg_kvers" ]; then
check_kver "$kver" $cfg_kvers || {
debug "${cfg}: late load kernel version check for" \
" '$kver' against '$cfg_kvers' failed"
return 1
}
fi
# Check early load kernel version
if [ 0 -ne "$early_check" -a -n "$cfg_kvers_early" ]; then
check_kver "$kver" $cfg_kvers_early || {
debug "${cfg}: early load kernel version check for" \
"'$kver' against '$cfg_kvers_early' failed"
return 1
}
fi
# Check current microcode version for the late update
if [ -n "$cfg_mc_min_ver_late" -a 1 -ne "$early_check" -a \
"x$cpu_model" = "x$cfg_model" ]; then
cpu_mc_ver="$(get_mc_ver)"
[ 1 -eq $((cpu_mc_ver >= cfg_mc_min_ver_late)) ] || {
debug "${cfg}: CPU microcode version $cpu_mc_ver" \
"failed check (should be at least" \
"${cfg_mc_min_ver_late})"
return 1
}
fi
# Check PCI devices if model filter is enabled
# Note that the model filter check is done inside check_pci_config_val
# based on the 'mode=' parameter.
if [ -n "$cfg_pci" ]; then
pci_line="$(printf "%s\n" "$cfg_pci" | while read -r pci_line; do
[ -n "$pci_line" ] || continue
pci_res=$(check_pci_config_val "$pci_line" \
"$match_model")
[ 0 != "$pci_res" ] || continue
echo "$pci_res $pci_line"
break
done
echo "0 ")"
[ -z "${pci_line#* }" ] || {
debug "PCI configuration word check '${pci_line#* }'" \
"failed (with return code ${pci_line%% *})"
return 1
}
fi
# Check DMI data if model filter is enabled
# Note that the model filter check is done inside check_dmi_val
# (which returns the value of 'no-model-mode=' parameter
# if it is disenaged).
if [ -n "$cfg_dmi" ]; then
dmi_line="$(printf "%s\n" "$cfg_dmi" | while read -r dmi_line
do
[ -n "$dmi_line" ] || continue
dmi_res=$(check_dmi_val "$dmi_line" \
"$match_model")
[ 0 != "$dmi_res" ] || continue
echo "$dmi_res $dmi_line"
break
done
echo "0 ")"
[ -z "${dmi_line#* }" ] || {
debug "DMI data check '${dmi_line#* }'" \
"failed (with return code ${dmi_line%% *})"
return 1
}
fi
return 0
}
for cfg in $(echo "${configs}"); do
if cfg_path=$(check_caveat "$cfg"; exit "$?")
then
ret_cfgs="$ret_cfgs $cfg"
ret_paths="$ret_paths $cfg_path"
ok_cfgs="$ok_cfgs $cfg"
ok_paths="$ok_paths $cfg_path"
else
case "$?" in
1)
ret=1
ret_cfgs="$ret_cfgs $cfg"
ret_paths="$ret_paths $cfg_path"
fail_cfgs="$fail_cfgs $cfg"
fail_paths="$fail_paths $cfg_path"
[ 0 -eq "$print_disclaimers" ] \
|| [ ! -e "${MC_CAVEATS_DATA_DIR}/${cfg}/disclaimer" ] \
|| /bin/cat "${MC_CAVEATS_DATA_DIR}/${cfg}/disclaimer"
;;
2|3)
skip_cfgs="$skip_cfgs $cfg";
;;
*)
debug "Unexpected check_caveat return code '$?'" \
"for config '$cfg'"
;;
esac
fi
done
[ 0 -eq "$print_disclaimers" ] || exit 0
echo "cfgs$ret_cfgs"
echo "skip_cfgs$skip_cfgs"
echo "paths$ret_paths"
echo "ok_cfgs$ok_cfgs"
echo "ok_paths$ok_paths"
echo "fail_cfgs$fail_cfgs"
echo "fail_paths$fail_paths"
exit $ret
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