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Revision b837913fc2d9061bf9b8c0dd6bf2d24e2f98b84a authored by jacek.tomaka@poczta.fm on 23 April 2018, 16:14:25 UTC, committed by Thomas Gleixner on 26 April 2018, 19:42:44 UTC 
x86/cpu/intel: Add missing TLB cpuid values
 
Make kernel print the correct number of TLB entries on Intel Xeon Phi 7210
(and others)

Before:
[ 0.320005] Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
After:
[ 0.320005] Last level dTLB entries: 4KB 256, 2MB 128, 4MB 128, 1GB 16

The entries do exist in the official Intel SMD but the type column there is
incorrect (states "Cache" where it should read "TLB"), but the entries for
the values 0x6B, 0x6C and 0x6D are correctly described as 'Data TLB'.

Signed-off-by: Jacek Tomaka <jacek.tomaka@poczta.fm>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20180423161425.24366-1-jacekt@dugeo.com
1 parent da6fa7e
Raw File
debugfs.c 
/*
 * cfg80211 debugfs
 *
 * Copyright 2009	Luis R. Rodriguez <lrodriguez@atheros.com>
 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/slab.h>
#include "core.h"
#include "debugfs.h"

#define DEBUGFS_READONLY_FILE(name, buflen, fmt, value...)		\
static ssize_t name## _read(struct file *file, char __user *userbuf,	\
			    size_t count, loff_t *ppos)			\
{									\
	struct wiphy *wiphy = file->private_data;			\
	char buf[buflen];						\
	int res;							\
									\
	res = scnprintf(buf, buflen, fmt "\n", ##value);		\
	return simple_read_from_buffer(userbuf, count, ppos, buf, res);	\
}									\
									\
static const struct file_operations name## _ops = {			\
	.read = name## _read,						\
	.open = simple_open,						\
	.llseek = generic_file_llseek,					\
}

DEBUGFS_READONLY_FILE(rts_threshold, 20, "%d",
		      wiphy->rts_threshold);
DEBUGFS_READONLY_FILE(fragmentation_threshold, 20, "%d",
		      wiphy->frag_threshold);
DEBUGFS_READONLY_FILE(short_retry_limit, 20, "%d",
		      wiphy->retry_short);
DEBUGFS_READONLY_FILE(long_retry_limit, 20, "%d",
		      wiphy->retry_long);

static int ht_print_chan(struct ieee80211_channel *chan,
			 char *buf, int buf_size, int offset)
{
	if (WARN_ON(offset > buf_size))
		return 0;

	if (chan->flags & IEEE80211_CHAN_DISABLED)
		return scnprintf(buf + offset,
				 buf_size - offset,
				 "%d Disabled\n",
				 chan->center_freq);

	return scnprintf(buf + offset,
			 buf_size - offset,
			 "%d HT40 %c%c\n",
			 chan->center_freq,
			 (chan->flags & IEEE80211_CHAN_NO_HT40MINUS) ?
				' ' : '-',
			 (chan->flags & IEEE80211_CHAN_NO_HT40PLUS) ?
				' ' : '+');
}

static ssize_t ht40allow_map_read(struct file *file,
				  char __user *user_buf,
				  size_t count, loff_t *ppos)
{
	struct wiphy *wiphy = file->private_data;
	char *buf;
	unsigned int offset = 0, buf_size = PAGE_SIZE, i, r;
	enum nl80211_band band;
	struct ieee80211_supported_band *sband;

	buf = kzalloc(buf_size, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	rtnl_lock();

	for (band = 0; band < NUM_NL80211_BANDS; band++) {
		sband = wiphy->bands[band];
		if (!sband)
			continue;
		for (i = 0; i < sband->n_channels; i++)
			offset += ht_print_chan(&sband->channels[i],
						buf, buf_size, offset);
	}

	rtnl_unlock();

	r = simple_read_from_buffer(user_buf, count, ppos, buf, offset);

	kfree(buf);

	return r;
}

static const struct file_operations ht40allow_map_ops = {
	.read = ht40allow_map_read,
	.open = simple_open,
	.llseek = default_llseek,
};

#define DEBUGFS_ADD(name)						\
	debugfs_create_file(#name, 0444, phyd, &rdev->wiphy, &name## _ops)

void cfg80211_debugfs_rdev_add(struct cfg80211_registered_device *rdev)
{
	struct dentry *phyd = rdev->wiphy.debugfsdir;

	DEBUGFS_ADD(rts_threshold);
	DEBUGFS_ADD(fragmentation_threshold);
	DEBUGFS_ADD(short_retry_limit);
	DEBUGFS_ADD(long_retry_limit);
	DEBUGFS_ADD(ht40allow_map);
}
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