tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * blacklist.c
3 *
4 * Check to see if the given machine has a known bad ACPI BIOS
5 * or if the BIOS is too old.
6 *
7 * Copyright (C) 2004 Len Brown <len.brown@intel.com>
8 * Copyright (C) 2002 Andy Grover <andrew.grover@intel.com>
9 *
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or (at
15 * your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
25 *
26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
27 */
28
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/init.h>
32#include <linux/acpi.h>
33#include <acpi/acpi_bus.h>
34#include <linux/dmi.h>
35
36enum acpi_blacklist_predicates {
37 all_versions,
38 less_than_or_equal,
39 equal,
40 greater_than_or_equal,
41};
42
43struct acpi_blacklist_item {
44 char oem_id[7];
45 char oem_table_id[9];
46 u32 oem_revision;
47 acpi_table_type table;
48 enum acpi_blacklist_predicates oem_revision_predicate;
49 char *reason;
50 u32 is_critical_error;
51};
52
53/*
54 * POLICY: If *anything* doesn't work, put it on the blacklist.
55 * If they are critical errors, mark it critical, and abort driver load.
56 */
57static struct acpi_blacklist_item acpi_blacklist[] __initdata = {
58 /* Compaq Presario 1700 */
59 {"PTLTD ", " DSDT ", 0x06040000, ACPI_DSDT, less_than_or_equal,
60 "Multiple problems", 1},
61 /* Sony FX120, FX140, FX150? */
62 {"SONY ", "U0 ", 0x20010313, ACPI_DSDT, less_than_or_equal,
63 "ACPI driver problem", 1},
64 /* Compaq Presario 800, Insyde BIOS */
65 {"INT440", "SYSFexxx", 0x00001001, ACPI_DSDT, less_than_or_equal,
66 "Does not use _REG to protect EC OpRegions", 1},
67 /* IBM 600E - _ADR should return 7, but it returns 1 */
68 {"IBM ", "TP600E ", 0x00000105, ACPI_DSDT, less_than_or_equal,
69 "Incorrect _ADR", 1},
70 {"ASUS\0\0", "P2B-S ", 0, ACPI_DSDT, all_versions,
71 "Bogus PCI routing", 1},
72
73 {""}
74};
75
76#if CONFIG_ACPI_BLACKLIST_YEAR
77
78static int __init blacklist_by_year(void)
79{
80 int year = dmi_get_year(DMI_BIOS_DATE);
81 /* Doesn't exist? Likely an old system */
82 if (year == -1)
83 return 1;
84 /* 0? Likely a buggy new BIOS */
85 if (year == 0)
86 return 0;
87 if (year < CONFIG_ACPI_BLACKLIST_YEAR) {
88 printk(KERN_ERR PREFIX "BIOS age (%d) fails cutoff (%d), "
89 "acpi=force is required to enable ACPI\n",
90 year, CONFIG_ACPI_BLACKLIST_YEAR);
91 return 1;
92 }
93 return 0;
94}
95#else
96static inline int blacklist_by_year(void)
97{
98 return 0;
99}
100#endif
101
102int __init acpi_blacklisted(void)
103{
104 int i = 0;
105 int blacklisted = 0;
106 struct acpi_table_header *table_header;
107
108 while (acpi_blacklist[i].oem_id[0] != '\0') {
109 if (acpi_get_table_header_early
110 (acpi_blacklist[i].table, &table_header)) {
111 i++;
112 continue;
113 }
114
115 if (strncmp(acpi_blacklist[i].oem_id, table_header->oem_id, 6)) {
116 i++;
117 continue;
118 }
119
120 if (strncmp
121 (acpi_blacklist[i].oem_table_id, table_header->oem_table_id,
122 8)) {
123 i++;
124 continue;
125 }
126
127 if ((acpi_blacklist[i].oem_revision_predicate == all_versions)
128 || (acpi_blacklist[i].oem_revision_predicate ==
129 less_than_or_equal
130 && table_header->oem_revision <=
131 acpi_blacklist[i].oem_revision)
132 || (acpi_blacklist[i].oem_revision_predicate ==
133 greater_than_or_equal
134 && table_header->oem_revision >=
135 acpi_blacklist[i].oem_revision)
136 || (acpi_blacklist[i].oem_revision_predicate == equal
137 && table_header->oem_revision ==
138 acpi_blacklist[i].oem_revision)) {
139
140 printk(KERN_ERR PREFIX
141 "Vendor \"%6.6s\" System \"%8.8s\" "
142 "Revision 0x%x has a known ACPI BIOS problem.\n",
143 acpi_blacklist[i].oem_id,
144 acpi_blacklist[i].oem_table_id,
145 acpi_blacklist[i].oem_revision);
146
147 printk(KERN_ERR PREFIX
148 "Reason: %s. This is a %s error\n",
149 acpi_blacklist[i].reason,
150 (acpi_blacklist[i].
151 is_critical_error ? "non-recoverable" :
152 "recoverable"));
153
154 blacklisted = acpi_blacklist[i].is_critical_error;
155 break;
156 } else {
157 i++;
158 }
159 }
160
161 blacklisted += blacklist_by_year();
162
163 return blacklisted;
164}