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[uCode] Add experimental check for pending AMD microcode updates (git…
…hub issue #150).
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,202 @@ | ||
| # needrestart - Restart daemons after library updates. | ||
| # | ||
| # Authors: | ||
| # Thomas Liske <thomas@fiasko-nw.net> | ||
| # | ||
| # Copyright Holder: | ||
| # 2013 - 2019 (C) Thomas Liske [http://fiasko-nw.net/~thomas/] | ||
| # | ||
| # License: | ||
| # This program is free software; you can redistribute it and/or modify | ||
| # it under the terms of the GNU General Public License as published by | ||
| # the Free Software Foundation; either version 2 of the License, or | ||
| # (at your option) any later version. | ||
| # | ||
| # This program is distributed in the hope that it will be useful, | ||
| # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| # GNU General Public License for more details. | ||
| # | ||
| # You should have received a copy of the GNU General Public License | ||
| # along with this package; if not, write to the Free Software | ||
| # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
| # | ||
|
|
||
| # | ||
| # This package is based on the result of the following paper: | ||
| # | ||
| # Security Analysis of x86 Processor Microcode | ||
| # Daming D. Chen <ddchen@asu.edu> | ||
| # Gail-Joon Ahn <gahn@asu.edu> | ||
| # | ||
| # https://www.dcddcc.com/docs/2014_paper_microcode.pdf | ||
| # | ||
| package NeedRestart::uCode::AMD; | ||
|
|
||
| use strict; | ||
| use warnings; | ||
| use NeedRestart::uCode; | ||
| use NeedRestart::Utils; | ||
| use File::Basename; | ||
| use POSIX qw(uname); | ||
| use Locale::TextDomain 'needrestart'; | ||
|
|
||
| my $LOGPREF = '[uCode/AMD]'; | ||
|
|
||
| sub nr_ucode_init { | ||
| my ( $sysname, $nodename, $release, $version, $machine ) = uname; | ||
| my $is_x86 = ( $machine =~ /^(i\d86|x86_64)$/ ); | ||
|
|
||
| die "$LOGPREF Not running on x86!\n" unless ($is_x86); | ||
| } | ||
|
|
||
| my $_ucodes; | ||
|
|
||
| sub _scan_ucodes { | ||
| my $debug = shift; | ||
|
|
||
| # scan AMD ucode files | ||
| foreach my $fn (</lib/firmware/amd-ucode/microcode_*.bin>) { | ||
| my $bn = basename( $fn, '.bin' ); | ||
| my $fh; | ||
|
|
||
| unless ( open( $fh, '<:raw', $fn ) ) { | ||
| warn "$LOGPREF Failed to open ucode source file '$fn': $!\n"; | ||
| next; | ||
| } | ||
| my @stat = stat($fh); | ||
|
|
||
| my $fpos = read( $fh, my $buf, 12 ); | ||
| my ( $hdr_magic, $hdr_type, $hdr_size ) = unpack( 'a4VV', $buf ); | ||
|
|
||
| if ( $hdr_magic ne "DMA\0" ) { | ||
| warn "$LOGPREF Invalid magic header ($hdr_magic)!\n"; | ||
| next; | ||
| } | ||
| if ( $hdr_type != 0 ) { | ||
| warn "$LOGPREF Unsupported table type $hdr_type!\n"; | ||
| next; | ||
| } | ||
|
|
||
| for ( ; $fpos < $hdr_size ; ) { | ||
| $fpos += read( $fh, $buf, 16 ); | ||
| my ( $pkg_cpuid, $pkg_errmask, $pkg_errcomp, $pkg_prid, $pkg_unk ) | ||
| = unpack( 'VVVvv', $buf ); | ||
|
|
||
| if ( $pkg_cpuid > 0 ) { | ||
| $_ucodes->{cpuid}->{$pkg_cpuid} = $pkg_prid; | ||
| } | ||
| } | ||
|
|
||
| for ( ; $fpos < $stat[7] ; ) { | ||
| $fpos += read( $fh, $buf, 8 ); | ||
| my ( $upd_type, $upd_size ) = unpack( 'VV', $buf ); | ||
|
|
||
| $fpos += read( $fh, $buf, $upd_size ); | ||
| my ( | ||
| $pat_date, $pat_pid, $pat_did, $pat_dlen, $pat_iflg, | ||
| $pat_dchk, $pat_ndid, $pat_sdid, $pat_prid | ||
| ) = unpack( 'VVvCCVVVv', $buf ); | ||
|
|
||
| $_ucodes->{prid}->{$pat_prid} = $pat_pid; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| sub nr_ucode_check_real { | ||
| my $debug = shift; | ||
| my $ui = shift; | ||
| my $info = shift; | ||
|
|
||
| # check for AMD cpu | ||
| unless ( defined( $info->{vendor_id} ) | ||
| && $info->{vendor_id} eq 'AuthenticAMD' ) | ||
| { | ||
| die "$LOGPREF #$info->{processor} cpu vendor id mismatch\n"; | ||
| } | ||
|
|
||
| # get CPUID using kernel module | ||
| my $cpuid; | ||
| if ( open( my $fh, '<:raw', "/dev/cpu/$info->{processor}/cpuid" ) ) { | ||
| seek( $fh, 1, 0 ); | ||
| read( $fh, my $eax, 16 ); | ||
| close($fh); | ||
| $cpuid = unpack( 'V', $eax ); | ||
| printf( STDERR | ||
| "$LOGPREF #$info->{processor} cpuid 0x%08x (/dev/cpu/$info->{processor}/cpuid)\n", | ||
| $cpuid | ||
| ) if ($debug); | ||
| } | ||
| else { | ||
| warn | ||
| "$LOGPREF #$info->{processor} Failed to open /dev/cpu/$info->{processor}/cpuid (Missed \`modprobe cpuid\`?): $!\n" | ||
| if ($debug); | ||
| } | ||
|
|
||
| # get CPUID from /proc/cpuinfo | ||
| my $family = int( $info->{'cpu family'} ); | ||
| my $xfamily = 0; | ||
| if ( $family > 0xf ) { | ||
| $xfamily = $family - 0xf; | ||
| $family = 0xf; | ||
| } | ||
|
|
||
| my $model = int( $info->{model} ); | ||
| my $xmodel = $model >> 4; | ||
| $model = $model & 0xf; | ||
|
|
||
| my $stepping = int( $info->{stepping} ); | ||
| my $eax = | ||
| ( ( ( $xfamily & 0xff ) << 20 ) + | ||
| ( ( $xmodel & 0xf ) << 16 ) + | ||
| ( ( $family & 0xf ) << 8 ) + | ||
| ( ( $model & 0xf ) << 4 ) + | ||
| ( ( $stepping & 0xf ) << 0 ) ); | ||
|
|
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| printf( STDERR "$LOGPREF #$info->{processor} cpuid 0x%08x (/proc/cpuinfo)\n", $eax ) | ||
| if ($debug); | ||
|
|
||
| if ($cpuid) { | ||
| if ( $cpuid != $eax ) { | ||
| warn "$LOGPREF #$info->{processor} CPUID mismatch detected!\n" if ($debug); | ||
| } | ||
| } | ||
| else { | ||
| $cpuid = $eax; | ||
| } | ||
|
|
||
| # get microcode version of cpu | ||
| my $ucode = hex( $info->{microcode} ); | ||
| printf( STDERR "$LOGPREF #$info->{processor} running ucode 0x%08x\n", $ucode ) if ($debug); | ||
|
|
||
| unless ( defined($_ucodes) ) { | ||
| _scan_ucodes(); | ||
| } | ||
|
|
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| my %vars = ( CURRENT => sprintf( "0x%08x", $ucode ), ); | ||
|
|
||
| # check for microcode updates | ||
| if ( exists( $_ucodes->{cpuid}->{$cpuid} ) ) { | ||
| my $prid = $_ucodes->{cpuid}->{$cpuid}; | ||
| if ( exists( $_ucodes->{prid}->{$prid} ) ) { | ||
| $vars{AVAIL} = sprintf( "0x%08x", $_ucodes->{prid}->{$prid} ), | ||
|
|
||
| print STDERR "$LOGPREF #$info->{processor} found ucode $vars{AVAIL}\n" if ($debug); | ||
| if ( $_ucodes->{prid}->{$prid} > $ucode ) { | ||
| return ( NRM_OBSOLETE, %vars ); | ||
| } | ||
| } | ||
| else { | ||
| print STDERR "$LOGPREF #$info->{processor} no ucode updates available\n" if ($debug); | ||
| } | ||
| return ( NRM_CURRENT, %vars ); | ||
| } | ||
| else { | ||
| print STDERR "$LOGPREF #$info->{processor} no ucode updates available\n" if ($debug); | ||
| return ( NRM_CURRENT, %vars ); | ||
| } | ||
|
|
||
| return ( NRM_UNKNOWN, %vars ); | ||
| } | ||
|
|
||
| 1; |
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