blacklist.c
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/*
* blacklist.c
*
* Check to see if the given machine has a known bad ACPI BIOS
* or if the BIOS is too old.
* Check given machine against acpi_rev_dmi_table[].
*
* Copyright (C) 2004 Len Brown <len.brown@intel.com>
* Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
* 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 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.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/dmi.h>
#include "internal.h"
enum acpi_blacklist_predicates {
all_versions,
less_than_or_equal,
equal,
greater_than_or_equal,
};
struct acpi_blacklist_item {
char oem_id[7];
char oem_table_id[9];
u32 oem_revision;
char *table;
enum acpi_blacklist_predicates oem_revision_predicate;
char *reason;
u32 is_critical_error;
};
static struct dmi_system_id acpi_rev_dmi_table[] __initdata;
/*
* POLICY: If *anything* doesn't work, put it on the blacklist.
* If they are critical errors, mark it critical, and abort driver load.
*/
static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
/* Compaq Presario 1700 */
{"PTLTD ", " DSDT ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal,
"Multiple problems", 1},
/* Sony FX120, FX140, FX150? */
{"SONY ", "U0 ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal,
"ACPI driver problem", 1},
/* Compaq Presario 800, Insyde BIOS */
{"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal,
"Does not use _REG to protect EC OpRegions", 1},
/* IBM 600E - _ADR should return 7, but it returns 1 */
{"IBM ", "TP600E ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal,
"Incorrect _ADR", 1},
{""}
};
int __init acpi_blacklisted(void)
{
int i = 0;
int blacklisted = 0;
struct acpi_table_header table_header;
while (acpi_blacklist[i].oem_id[0] != '\0') {
if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) {
i++;
continue;
}
if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) {
i++;
continue;
}
if (strncmp
(acpi_blacklist[i].oem_table_id, table_header.oem_table_id,
8)) {
i++;
continue;
}
if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
|| (acpi_blacklist[i].oem_revision_predicate ==
less_than_or_equal
&& table_header.oem_revision <=
acpi_blacklist[i].oem_revision)
|| (acpi_blacklist[i].oem_revision_predicate ==
greater_than_or_equal
&& table_header.oem_revision >=
acpi_blacklist[i].oem_revision)
|| (acpi_blacklist[i].oem_revision_predicate == equal
&& table_header.oem_revision ==
acpi_blacklist[i].oem_revision)) {
printk(KERN_ERR PREFIX
"Vendor \"%6.6s\" System \"%8.8s\" "
"Revision 0x%x has a known ACPI BIOS problem.\n",
acpi_blacklist[i].oem_id,
acpi_blacklist[i].oem_table_id,
acpi_blacklist[i].oem_revision);
printk(KERN_ERR PREFIX
"Reason: %s. This is a %s error\n",
acpi_blacklist[i].reason,
(acpi_blacklist[i].
is_critical_error ? "non-recoverable" :
"recoverable"));
blacklisted = acpi_blacklist[i].is_critical_error;
break;
} else {
i++;
}
}
(void)early_acpi_osi_init();
dmi_check_system(acpi_rev_dmi_table);
return blacklisted;
}
#ifdef CONFIG_DMI
#ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
static int __init dmi_enable_rev_override(const struct dmi_system_id *d)
{
printk(KERN_NOTICE PREFIX "DMI detected: %s (force ACPI _REV to 5)\n",
d->ident);
acpi_rev_override_setup(NULL);
return 0;
}
#endif
static struct dmi_system_id acpi_rev_dmi_table[] __initdata = {
#ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
/*
* DELL XPS 13 (2015) switches sound between HDA and I2S
* depending on the ACPI _REV callback. If userspace supports
* I2S sufficiently (or if you do not care about sound), you
* can safely disable this quirk.
*/
{
.callback = dmi_enable_rev_override,
.ident = "DELL XPS 13 (2015)",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9343"),
},
},
#endif
{}
};
#endif /* CONFIG_DMI */