1#!/bin/sh 2# SPDX-License-Identifier: GPL-2.0-only 3# 4# Copyright 2015, Daniel Axtens, IBM Corporation 5# 6 7 8# do we have ./getscom, ./putscom? 9if [ -x ./getscom ] && [ -x ./putscom ]; then 10 GETSCOM=./getscom 11 PUTSCOM=./putscom 12elif which getscom > /dev/null; then 13 GETSCOM=$(which getscom) 14 PUTSCOM=$(which putscom) 15else 16 cat <<EOF 17Can't find getscom/putscom in . or \$PATH. 18See https://github.com/open-power/skiboot. 19The tool is in external/xscom-utils 20EOF 21 exit 1 22fi 23 24# We will get 8 HMI events per injection 25# todo: deal with things being offline 26expected_hmis=8 27COUNT_HMIS() { 28 dmesg | grep -c 'Harmless Hypervisor Maintenance interrupt' 29} 30 31# massively expand snooze delay, allowing injection on all cores 32ppc64_cpu --smt-snooze-delay=1000000000 33 34# when we exit, restore it 35trap "ppc64_cpu --smt-snooze-delay=100" 0 1 36 37# for each chip+core combination 38# todo - less fragile parsing 39egrep -o 'OCC: Chip [0-9a-f]+ Core [0-9a-f]' < /sys/firmware/opal/msglog | 40while read chipcore; do 41 chip=$(echo "$chipcore"|awk '{print $3}') 42 core=$(echo "$chipcore"|awk '{print $5}') 43 fir="0x1${core}013100" 44 45 # verify that Core FIR is zero as expected 46 if [ "$($GETSCOM -c 0x${chip} $fir)" != 0 ]; then 47 echo "FIR was not zero before injection for chip $chip, core $core. Aborting!" 48 echo "Result of $GETSCOM -c 0x${chip} $fir:" 49 $GETSCOM -c 0x${chip} $fir 50 echo "If you get a -5 error, the core may be in idle state. Try stress-ng." 51 echo "Otherwise, try $PUTSCOM -c 0x${chip} $fir 0" 52 exit 1 53 fi 54 55 # keep track of the number of HMIs handled 56 old_hmis=$(COUNT_HMIS) 57 58 # do injection, adding a marker to dmesg for clarity 59 echo "Injecting HMI on core $core, chip $chip" | tee /dev/kmsg 60 # inject a RegFile recoverable error 61 if ! $PUTSCOM -c 0x${chip} $fir 2000000000000000 > /dev/null; then 62 echo "Error injecting. Aborting!" 63 exit 1 64 fi 65 66 # now we want to wait for all the HMIs to be processed 67 # we expect one per thread on the core 68 i=0; 69 new_hmis=$(COUNT_HMIS) 70 while [ $new_hmis -lt $((old_hmis + expected_hmis)) ] && [ $i -lt 12 ]; do 71 echo "Seen $((new_hmis - old_hmis)) HMI(s) out of $expected_hmis expected, sleeping" 72 sleep 5; 73 i=$((i + 1)) 74 new_hmis=$(COUNT_HMIS) 75 done 76 if [ $i = 12 ]; then 77 echo "Haven't seen expected $expected_hmis recoveries after 1 min. Aborting." 78 exit 1 79 fi 80 echo "Processed $expected_hmis events; presumed success. Check dmesg." 81 echo "" 82done 83