/*
 * Copyright 2015, Cyril Bur, IBM Corp.
 *
 * 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 test attempts to see if the VMX registers change across a syscall (fork).
 */

#include <altivec.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "utils.h"

vector int varray[] = {{1, 2, 3, 4}, {5, 6, 7, 8}, {9, 10,11,12},
	{13,14,15,16},{17,18,19,20},{21,22,23,24},
	{25,26,27,28},{29,30,31,32},{33,34,35,36},
	{37,38,39,40},{41,42,43,44},{45,46,47,48}};

extern int test_vmx(vector int *varray, pid_t *pid);

int vmx_syscall(void)
{
	pid_t fork_pid;
	int i;
	int ret;
	int child_ret;
	for (i = 0; i < 1000; i++) {
		/* test_vmx will fork() */
		ret = test_vmx(varray, &fork_pid);
		if (fork_pid == -1)
			return -1;
		if (fork_pid == 0)
			exit(ret);
		waitpid(fork_pid, &child_ret, 0);
		if (ret || child_ret)
			return 1;
	}

	return 0;
}

int test_vmx_syscall(void)
{
	/*
	 * Setup an environment with much context switching
	 */
	pid_t pid2;
	pid_t pid = fork();
	int ret;
	int child_ret;
	FAIL_IF(pid == -1);

	pid2 = fork();
	ret = vmx_syscall();
	/* Can't FAIL_IF(pid2 == -1); because we've already forked */
	if (pid2 == -1) {
		/*
		 * Couldn't fork, ensure child_ret is set and is a fail
		 */
		ret = child_ret = 1;
	} else {
		if (pid2)
			waitpid(pid2, &child_ret, 0);
		else
			exit(ret);
	}

	ret |= child_ret;

	if (pid)
		waitpid(pid, &child_ret, 0);
	else
		exit(ret);

	FAIL_IF(ret || child_ret);
	return 0;
}

int main(int argc, char *argv[])
{
	return test_harness(test_vmx_syscall, "vmx_syscall");

}
ff2b81366'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ohci-st.c?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/ohci-st.c?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/host/ohci-st.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>host</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ohci-st.c?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>ohci-st.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='aaaec6fc755447a1d056765b11b24d8ff2b81366'/><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>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 19:03:21 +0100</td></tr>
<tr><th>committer</th><td>Thomas Gleixner &lt;tglx@linutronix.de&gt;</td><td class='right'>2017-01-31 20:22:18 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ohci-st.c?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>aaaec6fc755447a1d056765b11b24d8ff2b81366</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/host/ohci-st.c?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>a7f4167960ee1df86739905b6ccdeb95465bfe5f</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/host/ohci-st.c?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>drivers/usb/host/ohci-st.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/ohci-st.c?id=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>08d85f3ea99f1eeafc4e8507936190e86a16ee8c</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/ohci-st.c?id=aaaec6fc755447a1d056765b11b24d8ff2b81366&amp;id2=08d85f3ea99f1eeafc4e8507936190e86a16ee8c'>diff</a>)</td></tr></table>
<div class='commit-subject'>x86/irq: Make irq activate operations symmetric</div><div class='commit-msg'>The recent commit which prevents double activation of interrupts unearthed
interesting code in x86. The code (ab)uses irq_domain_activate_irq() to
reconfigure an already activated interrupt. That trips over the prevention
code now.

Fix it by deactivating the interrupt before activating the new configuration.

Fixes: 08d85f3ea99f1 "irqdomain: Avoid activating interrupts more than once"
Reported-and-tested-by: Mike Galbraith &lt;efault@gmx.de&gt;
Reported-and-tested-by: Borislav Petkov &lt;bp@alien8.de&gt;
Signed-off-by: Thomas Gleixner &lt;tglx@linutronix.de&gt;
Cc: Andrey Ryabinin &lt;aryabinin@virtuozzo.com&gt;
Cc: Marc Zyngier &lt;marc.zyngier@arm.com&gt;
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701311901580.3457@nanos

</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=aaaec6fc755447a1d056765b11b24d8ff2b81366'>Diffstat</a> (limited to 'drivers/usb/host/ohci-st.c')</div><table summary='diffstat' class='diffstat'>