/*********************************************************************
 *
 * Filename:      irproc.c
 * Version:       1.0
 * Description:   Various entries in the /proc file system
 * Status:        Experimental.
 * Author:        Thomas Davis, <ratbert@radiks.net>
 * Created at:    Sat Feb 21 21:33:24 1998
 * Modified at:   Sun Nov 14 08:54:54 1999
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 *
 *     Copyright (c) 1998-1999, Dag Brattli <dagb@cs.uit.no>
 *     Copyright (c) 1998, Thomas Davis, <ratbert@radiks.net>,
 *     All Rights Reserved.
 *
 *     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.
 *
 *     I, Thomas Davis, provide no warranty for any of this software.
 *     This material is provided "AS-IS" and at no charge.
 *
 ********************************************************************/

#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/init.h>
#include <net/net_namespace.h>

#include <net/irda/irda.h>
#include <net/irda/irlap.h>
#include <net/irda/irlmp.h>

extern const struct file_operations discovery_seq_fops;
extern const struct file_operations irlap_seq_fops;
extern const struct file_operations irlmp_seq_fops;
extern const struct file_operations irttp_seq_fops;
extern const struct file_operations irias_seq_fops;

struct irda_entry {
	const char *name;
	const struct file_operations *fops;
};

struct proc_dir_entry *proc_irda;
EXPORT_SYMBOL(proc_irda);

static const struct irda_entry irda_dirs[] = {
	{"discovery",	&discovery_seq_fops},
	{"irttp",	&irttp_seq_fops},
	{"irlmp",	&irlmp_seq_fops},
	{"irlap",	&irlap_seq_fops},
	{"irias",	&irias_seq_fops},
};

/*
 * Function irda_proc_register (void)
 *
 *    Register irda entry in /proc file system
 *
 */
void __init irda_proc_register(void)
{
	int i;

	proc_irda = proc_mkdir("irda", init_net.proc_net);
	if (proc_irda == NULL)
		return;

	for (i = 0; i < ARRAY_SIZE(irda_dirs); i++)
		(void) proc_create(irda_dirs[i].name, 0, proc_irda,
				   irda_dirs[i].fops);
}

/*
 * Function irda_proc_unregister (void)
 *
 *    Unregister irda entry in /proc file system
 *
 */
void irda_proc_unregister(void)
{
	int i;

	if (proc_irda) {
		for (i=0; i<ARRAY_SIZE(irda_dirs); i++)
			remove_proc_entry(irda_dirs[i].name, proc_irda);

		remove_proc_entry("irda", init_net.proc_net);
		proc_irda = NULL;
	}
}


'range'>range</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/media?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>media</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>blackfin</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin/ppi.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>ppi.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='6e978b22efa1db9f6e71b24440b5f1d93e968ee3'/><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>Srinivas Pandruvada &lt;srinivas.pandruvada@linux.intel.com&gt;</td><td class='right'>2017-02-03 14:18:39 -0800</td></tr>
<tr><th>committer</th><td>Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;</td><td class='right'>2017-02-04 00:11:08 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin/ppi.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>6e978b22efa1db9f6e71b24440b5f1d93e968ee3</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/media/blackfin/ppi.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>c666f7a26b860674848949e39a610222b0723f89</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/media/blackfin/ppi.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>include/media/blackfin/ppi.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/media/blackfin/ppi.h?id=3c223c19aea85d3dda1416c187915f4a30b04b1f'>3c223c19aea85d3dda1416c187915f4a30b04b1f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/media/blackfin/ppi.h?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3&amp;id2=3c223c19aea85d3dda1416c187915f4a30b04b1f'>diff</a>)</td></tr></table>
<div class='commit-subject'>cpufreq: intel_pstate: Disable energy efficiency optimization</div><div class='commit-msg'>Some Kabylake desktop processors may not reach max turbo when running in
HWP mode, even if running under sustained 100% utilization.

This occurs when the HWP.EPP (Energy Performance Preference) is set to
"balance_power" (0x80) -- the default on most systems.

It occurs because the platform BIOS may erroneously enable an
energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not
recommended to be enabled on this SKU.

On the failing systems, this BIOS issue was not discovered when the
desktop motherboard was tested with Windows, because the BIOS also
neglects to provide the ACPI/CPPC table, that Windows requires to enable
HWP, and so Windows runs in legacy P-state mode, where this setting has
no effect.

Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and
so it runs in HWP mode, exposing this incorrect BIOS configuration.

There are several ways to address this problem.

First, Linux can also run in legacy P-state mode on this system.
As intel_pstate is how Linux enables HWP, booting with
"intel_pstate=disable"
will run in acpi-cpufreq/ondemand legacy p-state mode.

Or second, the "performance" governor can be used with intel_pstate,
which will modify HWP.EPP to 0.

Or third, starting in 4.10, the
/sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference
attribute in can be updated from "balance_power" to "performance".

Or fourth, apply this patch, which fixes the erroneous setting of
MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default
configuration to function as designed.

Signed-off-by: Srinivas Pandruvada &lt;srinivas.pandruvada@linux.intel.com&gt;
Reviewed-by: Len Brown &lt;len.brown@intel.com&gt;
Cc: 4.6+ &lt;stable@vger.kernel.org&gt; # 4.6+
Signed-off-by: Rafael J. Wysocki &lt;rafael.j.wysocki@intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=6e978b22efa1db9f6e71b24440b5f1d93e968ee3'>Diffstat</a> (limited to 'include/media/blackfin/ppi.h')</div><table summary='diffstat' class='diffstat'>