split script in multiple files, reassembled through build.sh

src/libs/380_hw_microcode.sh

@@ -0,0 +1,70 @@
+# vim: set ts=4 sw=4 sts=4 et:
+g_builtin_dbversion=$(awk '/^# %%% MCEDB / { print $4 }' "$0")
+if [ -r "$g_mcedb_cache" ]; then
+    # we have a local cache file, but it might be older than the builtin version we have
+    g_local_dbversion=$(awk '/^# %%% MCEDB / { print $4 }' "$g_mcedb_cache")
+    # sort -V sorts by version number
+    g_older_dbversion=$(printf "%b\n%b" "$g_local_dbversion" "$g_builtin_dbversion" | sort -V | head -n1)
+    if [ "$g_older_dbversion" = "$g_builtin_dbversion" ]; then
+        g_mcedb_source="$g_mcedb_cache"
+        g_mcedb_info="local firmwares DB $g_local_dbversion"
+    fi
+fi
+# if g_mcedb_source is not set, either we don't have a local cached db, or it is older than the builtin db
+if [ -z "${g_mcedb_source:-}" ]; then
+    g_mcedb_source="$0"
+    g_mcedb_info="builtin firmwares DB $g_builtin_dbversion"
+fi
+# Read the MCExtractor microcode database (from local cache or builtin) to stdout
+read_mcedb() {
+    awk '{ if (DELIM==1) { print $2 } } /^# %%% MCEDB / { DELIM=1 }' "$g_mcedb_source"
+}
+
+# Read the Intel official affected CPUs database (builtin) to stdout
+read_inteldb() {
+    if [ "$opt_intel_db" = 1 ]; then
+        awk '/^# %%% ENDOFINTELDB/ { exit } { if (DELIM==1) { print $2 } } /^# %%% INTELDB/ { DELIM=1 }' "$0"
+    fi
+    # otherwise don't output nothing, it'll be as if the database is empty
+}
+
+# Check whether the CPU is running the latest known microcode version
+# Sets: ret_is_latest_known_ucode_latest
+# Returns: 0=latest, 1=outdated, 2=unknown
+is_latest_known_ucode() {
+    local brand_prefix tuple pfmask ucode ucode_date
+    parse_cpu_details
+    if [ "$cpu_cpuid" = 0 ]; then
+        ret_is_latest_known_ucode_latest="couldn't get your cpuid"
+        return 2
+    fi
+    ret_is_latest_known_ucode_latest="latest microcode version for your CPU model is unknown"
+    if is_intel; then
+        brand_prefix=I
+    elif is_amd; then
+        brand_prefix=A
+    else
+        return 2
+    fi
+    for tuple in $(read_mcedb | grep "$(printf "^$brand_prefix,0x%08X," "$cpu_cpuid")"); do
+        # skip if the pfmask doesn't match our platformid
+        pfmask=$(echo "$tuple" | cut -d, -f3)
+        if is_intel && [ $((cpu_platformid & pfmask)) -eq 0 ]; then
+            continue
+        fi
+        ucode=$(($(echo "$tuple" | cut -d, -f4)))
+        ucode_date=$(echo "$tuple" | cut -d, -f5 | sed -r 's=(....)(..)(..)=\1/\2/\3=')
+        pr_debug "is_latest_known_ucode: with cpuid $cpu_cpuid has ucode $cpu_ucode, last known is $ucode from $ucode_date"
+        ret_is_latest_known_ucode_latest=$(printf "latest version is 0x%x dated $ucode_date according to $g_mcedb_info" "$ucode")
+        if [ "$cpu_ucode" -ge "$ucode" ]; then
+            return 0
+        else
+            return 1
+        fi
+    done
+    pr_debug "is_latest_known_ucode: this cpuid is not referenced ($cpu_cpuid)"
+    return 2
+}
+
+# Read and cache the kernel command line from /proc/cmdline or mock
+# Sets: g_kernel_cmdline