#!/bin/sh
#
# Copyright 2015, Daniel Axtens, IBM Corporation
#
# 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; version 2 of the License.
#
# 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.


# do we have ./getscom, ./putscom?
if [ -x ./getscom ] && [ -x ./putscom ]; then
	GETSCOM=./getscom
	PUTSCOM=./putscom
elif which getscom > /dev/null; then
	GETSCOM=$(which getscom)
	PUTSCOM=$(which putscom)
else
	cat <<EOF
Can't find getscom/putscom in . or \$PATH.
See https://github.com/open-power/skiboot.
The tool is in external/xscom-utils
EOF
	exit 1
fi

# We will get 8 HMI events per injection
# todo: deal with things being offline
expected_hmis=8
COUNT_HMIS() {
    dmesg | grep -c 'Harmless Hypervisor Maintenance interrupt'
}

# massively expand snooze delay, allowing injection on all cores
ppc64_cpu --smt-snooze-delay=1000000000

# when we exit, restore it
trap "ppc64_cpu --smt-snooze-delay=100" 0 1

# for each chip+core combination
# todo - less fragile parsing
egrep -o 'OCC: Chip [0-9a-f]+ Core [0-9a-f]' < /sys/firmware/opal/msglog |
while read chipcore; do
	chip=$(echo "$chipcore"|awk '{print $3}')
	core=$(echo "$chipcore"|awk '{print $5}')
	fir="0x1${core}013100"

	# verify that Core FIR is zero as expected
	if [ "$($GETSCOM -c 0x${chip} $fir)" != 0 ]; then
		echo "FIR was not zero before injection for chip $chip, core $core. Aborting!"
		echo "Result of $GETSCOM -c 0x${chip} $fir:"
		$GETSCOM -c 0x${chip} $fir
		echo "If you get a -5 error, the core may be in idle state. Try stress-ng."
		echo "Otherwise, try $PUTSCOM -c 0x${chip} $fir 0"
		exit 1
	fi

	# keep track of the number of HMIs handled
	old_hmis=$(COUNT_HMIS)

	# do injection, adding a marker to dmesg for clarity
	echo "Injecting HMI on core $core, chip $chip" | tee /dev/kmsg
	# inject a RegFile recoverable error
	if ! $PUTSCOM -c 0x${chip} $fir 2000000000000000 > /dev/null; then
		echo "Error injecting. Aborting!"
		exit 1
	fi

	# now we want to wait for all the HMIs to be processed
	# we expect one per thread on the core
	i=0;
	new_hmis=$(COUNT_HMIS)
	while [ $new_hmis -lt $((old_hmis + expected_hmis)) ] && [ $i -lt 12 ]; do
	    echo "Seen $((new_hmis - old_hmis)) HMI(s) out of $expected_hmis expected, sleeping"
	    sleep 5;
	    i=$((i + 1))
	    new_hmis=$(COUNT_HMIS)
	done
	if [ $i = 12 ]; then
	    echo "Haven't seen expected $expected_hmis recoveries after 1 min. Aborting."
	    exit 1
	fi
	echo "Processed $expected_hmis events; presumed success. Check dmesg."
	echo ""
done
7fb837e93b517036fab4500fe39de5'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=99421c1cb27fb837e93b517036fab4500fe39de5'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=99421c1cb27fb837e93b517036fab4500fe39de5'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial?id=99421c1cb27fb837e93b517036fab4500fe39de5'>serial</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/f81534.c?id=99421c1cb27fb837e93b517036fab4500fe39de5'>f81534.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='99421c1cb27fb837e93b517036fab4500fe39de5'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-15 16:09:50 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-15 16:09:50 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/f81534.c?id=99421c1cb27fb837e93b517036fab4500fe39de5'>99421c1cb27fb837e93b517036fab4500fe39de5</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/serial/f81534.c?id=99421c1cb27fb837e93b517036fab4500fe39de5'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=99421c1cb27fb837e93b517036fab4500fe39de5'>de5fc5bacb671223f389793ad643cebe520bc292</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/serial/f81534.c?id=99421c1cb27fb837e93b517036fab4500fe39de5'>drivers/usb/serial/f81534.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/f81534.c?id=c92816275674c1491ce228ee49aa030a5fa1be04'>c92816275674c1491ce228ee49aa030a5fa1be04</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/f81534.c?id=99421c1cb27fb837e93b517036fab4500fe39de5&amp;id2=c92816275674c1491ce228ee49aa030a5fa1be04'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/f81534.c?id=93362fa47fe98b62e4a34ab408c4a418432e7939'>93362fa47fe98b62e4a34ab408c4a418432e7939</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/f81534.c?id=99421c1cb27fb837e93b517036fab4500fe39de5&amp;id2=93362fa47fe98b62e4a34ab408c4a418432e7939'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace</div><div class='commit-msg'>Pull namespace fixes from Eric Biederman:
 "This tree contains 4 fixes.

  The first is a fix for a race that can causes oopses under the right
  circumstances, and that someone just recently encountered.

  Past that are several small trivial correct fixes. A real issue that
  was blocking development of an out of tree driver, but does not appear
  to have caused any actual problems for in-tree code. A potential
  deadlock that was reported by lockdep. And a deadlock people have
  experienced and took the time to track down caused by a cleanup that
  removed the code to drop a reference count"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  sysctl: Drop reference added by grab_header in proc_sys_readdir
  pid: fix lockdep deadlock warning due to ucount_lock
  libfs: Modify mount_pseudo_xattr to be clear it is not a userspace mount
  mnt: Protect the mountpoint hashtable with mount_lock
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=99421c1cb27fb837e93b517036fab4500fe39de5'>Diffstat</a> (limited to 'drivers/usb/serial/f81534.c')</div><table summary='diffstat' class='diffstat'>