cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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misc.c (3539B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *  Misc and compatibility things
      4 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
      5 */
      6
      7#include <linux/init.h>
      8#include <linux/export.h>
      9#include <linux/moduleparam.h>
     10#include <linux/time.h>
     11#include <linux/slab.h>
     12#include <linux/ioport.h>
     13#include <sound/core.h>
     14
     15#ifdef CONFIG_SND_DEBUG
     16
     17#ifdef CONFIG_SND_DEBUG_VERBOSE
     18#define DEFAULT_DEBUG_LEVEL	2
     19#else
     20#define DEFAULT_DEBUG_LEVEL	1
     21#endif
     22
     23static int debug = DEFAULT_DEBUG_LEVEL;
     24module_param(debug, int, 0644);
     25MODULE_PARM_DESC(debug, "Debug level (0 = disable)");
     26
     27#endif /* CONFIG_SND_DEBUG */
     28
     29void release_and_free_resource(struct resource *res)
     30{
     31	if (res) {
     32		release_resource(res);
     33		kfree(res);
     34	}
     35}
     36EXPORT_SYMBOL(release_and_free_resource);
     37
     38#ifdef CONFIG_SND_VERBOSE_PRINTK
     39/* strip the leading path if the given path is absolute */
     40static const char *sanity_file_name(const char *path)
     41{
     42	if (*path == '/')
     43		return strrchr(path, '/') + 1;
     44	else
     45		return path;
     46}
     47#endif
     48
     49#if defined(CONFIG_SND_DEBUG) || defined(CONFIG_SND_VERBOSE_PRINTK)
     50void __snd_printk(unsigned int level, const char *path, int line,
     51		  const char *format, ...)
     52{
     53	va_list args;
     54#ifdef CONFIG_SND_VERBOSE_PRINTK
     55	int kern_level;
     56	struct va_format vaf;
     57	char verbose_fmt[] = KERN_DEFAULT "ALSA %s:%d %pV";
     58	bool level_found = false;
     59#endif
     60
     61#ifdef CONFIG_SND_DEBUG
     62	if (debug < level)
     63		return;
     64#endif
     65
     66	va_start(args, format);
     67#ifdef CONFIG_SND_VERBOSE_PRINTK
     68	vaf.fmt = format;
     69	vaf.va = &args;
     70
     71	while ((kern_level = printk_get_level(vaf.fmt)) != 0) {
     72		const char *end_of_header = printk_skip_level(vaf.fmt);
     73
     74		/* Ignore KERN_CONT. We print filename:line for each piece. */
     75		if (kern_level >= '0' && kern_level <= '7') {
     76			memcpy(verbose_fmt, vaf.fmt, end_of_header - vaf.fmt);
     77			level_found = true;
     78		}
     79
     80		vaf.fmt = end_of_header;
     81	}
     82
     83	if (!level_found && level)
     84		memcpy(verbose_fmt, KERN_DEBUG, sizeof(KERN_DEBUG) - 1);
     85
     86	printk(verbose_fmt, sanity_file_name(path), line, &vaf);
     87#else
     88	vprintk(format, args);
     89#endif
     90	va_end(args);
     91}
     92EXPORT_SYMBOL_GPL(__snd_printk);
     93#endif
     94
     95#ifdef CONFIG_PCI
     96#include <linux/pci.h>
     97/**
     98 * snd_pci_quirk_lookup_id - look up a PCI SSID quirk list
     99 * @vendor: PCI SSV id
    100 * @device: PCI SSD id
    101 * @list: quirk list, terminated by a null entry
    102 *
    103 * Look through the given quirk list and finds a matching entry
    104 * with the same PCI SSID.  When subdevice is 0, all subdevice
    105 * values may match.
    106 *
    107 * Returns the matched entry pointer, or NULL if nothing matched.
    108 */
    109const struct snd_pci_quirk *
    110snd_pci_quirk_lookup_id(u16 vendor, u16 device,
    111			const struct snd_pci_quirk *list)
    112{
    113	const struct snd_pci_quirk *q;
    114
    115	for (q = list; q->subvendor || q->subdevice; q++) {
    116		if (q->subvendor != vendor)
    117			continue;
    118		if (!q->subdevice ||
    119		    (device & q->subdevice_mask) == q->subdevice)
    120			return q;
    121	}
    122	return NULL;
    123}
    124EXPORT_SYMBOL(snd_pci_quirk_lookup_id);
    125
    126/**
    127 * snd_pci_quirk_lookup - look up a PCI SSID quirk list
    128 * @pci: pci_dev handle
    129 * @list: quirk list, terminated by a null entry
    130 *
    131 * Look through the given quirk list and finds a matching entry
    132 * with the same PCI SSID.  When subdevice is 0, all subdevice
    133 * values may match.
    134 *
    135 * Returns the matched entry pointer, or NULL if nothing matched.
    136 */
    137const struct snd_pci_quirk *
    138snd_pci_quirk_lookup(struct pci_dev *pci, const struct snd_pci_quirk *list)
    139{
    140	if (!pci)
    141		return NULL;
    142	return snd_pci_quirk_lookup_id(pci->subsystem_vendor,
    143				       pci->subsystem_device,
    144				       list);
    145}
    146EXPORT_SYMBOL(snd_pci_quirk_lookup);
    147#endif