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-rw-r--r--drivers/char/tpm/Makefile1
-rw-r--r--drivers/char/tpm/tpm.c1
-rw-r--r--drivers/char/tpm/tpm_acpi.c104
-rw-r--r--drivers/char/tpm/tpm_eventlog.c (renamed from drivers/char/tpm/tpm_bios.c)147
-rw-r--r--drivers/char/tpm/tpm_eventlog.h71
5 files changed, 182 insertions, 142 deletions
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
index a9c3afc92dbc..beac52f61a82 100644
--- a/drivers/char/tpm/Makefile
+++ b/drivers/char/tpm/Makefile
@@ -4,6 +4,7 @@
4obj-$(CONFIG_TCG_TPM) += tpm.o 4obj-$(CONFIG_TCG_TPM) += tpm.o
5ifdef CONFIG_ACPI 5ifdef CONFIG_ACPI
6 obj-$(CONFIG_TCG_TPM) += tpm_bios.o 6 obj-$(CONFIG_TCG_TPM) += tpm_bios.o
7 tpm_bios-objs += tpm_eventlog.o tpm_acpi.o
7endif 8endif
8obj-$(CONFIG_TCG_TIS) += tpm_tis.o 9obj-$(CONFIG_TCG_TIS) += tpm_tis.o
9obj-$(CONFIG_TCG_TIS_I2C_INFINEON) += tpm_i2c_infineon.o 10obj-$(CONFIG_TCG_TIS_I2C_INFINEON) += tpm_i2c_infineon.o
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
index 817f0ee202b6..677c6e26593f 100644
--- a/drivers/char/tpm/tpm.c
+++ b/drivers/char/tpm/tpm.c
@@ -30,6 +30,7 @@
30#include <linux/freezer.h> 30#include <linux/freezer.h>
31 31
32#include "tpm.h" 32#include "tpm.h"
33#include "tpm_eventlog.h"
33 34
34enum tpm_const { 35enum tpm_const {
35 TPM_MINOR = 224, /* officially assigned */ 36 TPM_MINOR = 224, /* officially assigned */
diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c
new file mode 100644
index 000000000000..a1bb5a182df9
--- /dev/null
+++ b/drivers/char/tpm/tpm_acpi.c
@@ -0,0 +1,104 @@
1/*
2 * Copyright (C) 2005 IBM Corporation
3 *
4 * Authors:
5 * Seiji Munetoh <munetoh@jp.ibm.com>
6 * Stefan Berger <stefanb@us.ibm.com>
7 * Reiner Sailer <sailer@watson.ibm.com>
8 * Kylene Hall <kjhall@us.ibm.com>
9 *
10 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
11 *
12 * Access to the eventlog extended by the TCG BIOS of PC platform
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * as published by the Free Software Foundation; either version
17 * 2 of the License, or (at your option) any later version.
18 *
19 */
20
21#include <linux/seq_file.h>
22#include <linux/fs.h>
23#include <linux/security.h>
24#include <linux/module.h>
25#include <linux/slab.h>
26#include <acpi/acpi.h>
27
28#include "tpm.h"
29#include "tpm_eventlog.h"
30
31struct acpi_tcpa {
32 struct acpi_table_header hdr;
33 u16 platform_class;
34 union {
35 struct client_hdr {
36 u32 log_max_len __attribute__ ((packed));
37 u64 log_start_addr __attribute__ ((packed));
38 } client;
39 struct server_hdr {
40 u16 reserved;
41 u64 log_max_len __attribute__ ((packed));
42 u64 log_start_addr __attribute__ ((packed));
43 } server;
44 };
45};
46
47/* read binary bios log */
48int read_log(struct tpm_bios_log *log)
49{
50 struct acpi_tcpa *buff;
51 acpi_status status;
52 struct acpi_table_header *virt;
53 u64 len, start;
54
55 if (log->bios_event_log != NULL) {
56 printk(KERN_ERR
57 "%s: ERROR - Eventlog already initialized\n",
58 __func__);
59 return -EFAULT;
60 }
61
62 /* Find TCPA entry in RSDT (ACPI_LOGICAL_ADDRESSING) */
63 status = acpi_get_table(ACPI_SIG_TCPA, 1,
64 (struct acpi_table_header **)&buff);
65
66 if (ACPI_FAILURE(status)) {
67 printk(KERN_ERR "%s: ERROR - Could not get TCPA table\n",
68 __func__);
69 return -EIO;
70 }
71
72 switch(buff->platform_class) {
73 case BIOS_SERVER:
74 len = buff->server.log_max_len;
75 start = buff->server.log_start_addr;
76 break;
77 case BIOS_CLIENT:
78 default:
79 len = buff->client.log_max_len;
80 start = buff->client.log_start_addr;
81 break;
82 }
83 if (!len) {
84 printk(KERN_ERR "%s: ERROR - TCPA log area empty\n", __func__);
85 return -EIO;
86 }
87
88 /* malloc EventLog space */
89 log->bios_event_log = kmalloc(len, GFP_KERNEL);
90 if (!log->bios_event_log) {
91 printk("%s: ERROR - Not enough Memory for BIOS measurements\n",
92 __func__);
93 return -ENOMEM;
94 }
95
96 log->bios_event_log_end = log->bios_event_log + len;
97
98 virt = acpi_os_map_memory(start, len);
99
100 memcpy(log->bios_event_log, virt, len);
101
102 acpi_os_unmap_memory(virt, len);
103 return 0;
104}
diff --git a/drivers/char/tpm/tpm_bios.c b/drivers/char/tpm/tpm_eventlog.c
index 0636520fa9bf..84ddc557b8f8 100644
--- a/drivers/char/tpm/tpm_bios.c
+++ b/drivers/char/tpm/tpm_eventlog.c
@@ -1,7 +1,8 @@
1/* 1/*
2 * Copyright (C) 2005 IBM Corporation 2 * Copyright (C) 2005, 2012 IBM Corporation
3 * 3 *
4 * Authors: 4 * Authors:
5 * Kent Yoder <key@linux.vnet.ibm.com>
5 * Seiji Munetoh <munetoh@jp.ibm.com> 6 * Seiji Munetoh <munetoh@jp.ibm.com>
6 * Stefan Berger <stefanb@us.ibm.com> 7 * Stefan Berger <stefanb@us.ibm.com>
7 * Reiner Sailer <sailer@watson.ibm.com> 8 * Reiner Sailer <sailer@watson.ibm.com>
@@ -9,7 +10,7 @@
9 * 10 *
10 * Maintained by: <tpmdd-devel@lists.sourceforge.net> 11 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
11 * 12 *
12 * Access to the eventlog extended by the TCG BIOS of PC platform 13 * Access to the eventlog created by a system's firmware / BIOS
13 * 14 *
14 * This program is free software; you can redistribute it and/or 15 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License 16 * modify it under the terms of the GNU General Public License
@@ -23,67 +24,10 @@
23#include <linux/security.h> 24#include <linux/security.h>
24#include <linux/module.h> 25#include <linux/module.h>
25#include <linux/slab.h> 26#include <linux/slab.h>
26#include <acpi/acpi.h>
27#include "tpm.h"
28
29#define TCG_EVENT_NAME_LEN_MAX 255
30#define MAX_TEXT_EVENT 1000 /* Max event string length */
31#define ACPI_TCPA_SIG "TCPA" /* 0x41504354 /'TCPA' */
32
33enum bios_platform_class {
34 BIOS_CLIENT = 0x00,
35 BIOS_SERVER = 0x01,
36};
37
38struct tpm_bios_log {
39 void *bios_event_log;
40 void *bios_event_log_end;
41};
42
43struct acpi_tcpa {
44 struct acpi_table_header hdr;
45 u16 platform_class;
46 union {
47 struct client_hdr {
48 u32 log_max_len __attribute__ ((packed));
49 u64 log_start_addr __attribute__ ((packed));
50 } client;
51 struct server_hdr {
52 u16 reserved;
53 u64 log_max_len __attribute__ ((packed));
54 u64 log_start_addr __attribute__ ((packed));
55 } server;
56 };
57};
58 27
59struct tcpa_event { 28#include "tpm.h"
60 u32 pcr_index; 29#include "tpm_eventlog.h"
61 u32 event_type;
62 u8 pcr_value[20]; /* SHA1 */
63 u32 event_size;
64 u8 event_data[0];
65};
66 30
67enum tcpa_event_types {
68 PREBOOT = 0,
69 POST_CODE,
70 UNUSED,
71 NO_ACTION,
72 SEPARATOR,
73 ACTION,
74 EVENT_TAG,
75 SCRTM_CONTENTS,
76 SCRTM_VERSION,
77 CPU_MICROCODE,
78 PLATFORM_CONFIG_FLAGS,
79 TABLE_OF_DEVICES,
80 COMPACT_HASH,
81 IPL,
82 IPL_PARTITION_DATA,
83 NONHOST_CODE,
84 NONHOST_CONFIG,
85 NONHOST_INFO,
86};
87 31
88static const char* tcpa_event_type_strings[] = { 32static const char* tcpa_event_type_strings[] = {
89 "PREBOOT", 33 "PREBOOT",
@@ -106,28 +50,6 @@ static const char* tcpa_event_type_strings[] = {
106 "Non-Host Info" 50 "Non-Host Info"
107}; 51};
108 52
109struct tcpa_pc_event {
110 u32 event_id;
111 u32 event_size;
112 u8 event_data[0];
113};
114
115enum tcpa_pc_event_ids {
116 SMBIOS = 1,
117 BIS_CERT,
118 POST_BIOS_ROM,
119 ESCD,
120 CMOS,
121 NVRAM,
122 OPTION_ROM_EXEC,
123 OPTION_ROM_CONFIG,
124 OPTION_ROM_MICROCODE = 10,
125 S_CRTM_VERSION,
126 S_CRTM_CONTENTS,
127 POST_CONTENTS,
128 HOST_TABLE_OF_DEVICES,
129};
130
131static const char* tcpa_pc_event_id_strings[] = { 53static const char* tcpa_pc_event_id_strings[] = {
132 "", 54 "",
133 "SMBIOS", 55 "SMBIOS",
@@ -358,65 +280,6 @@ static const struct seq_operations tpm_binary_b_measurments_seqops = {
358 .show = tpm_binary_bios_measurements_show, 280 .show = tpm_binary_bios_measurements_show,
359}; 281};
360 282
361/* read binary bios log */
362static int read_log(struct tpm_bios_log *log)
363{
364 struct acpi_tcpa *buff;
365 acpi_status status;
366 struct acpi_table_header *virt;
367 u64 len, start;
368
369 if (log->bios_event_log != NULL) {
370 printk(KERN_ERR
371 "%s: ERROR - Eventlog already initialized\n",
372 __func__);
373 return -EFAULT;
374 }
375
376 /* Find TCPA entry in RSDT (ACPI_LOGICAL_ADDRESSING) */
377 status = acpi_get_table(ACPI_SIG_TCPA, 1,
378 (struct acpi_table_header **)&buff);
379
380 if (ACPI_FAILURE(status)) {
381 printk(KERN_ERR "%s: ERROR - Could not get TCPA table\n",
382 __func__);
383 return -EIO;
384 }
385
386 switch(buff->platform_class) {
387 case BIOS_SERVER:
388 len = buff->server.log_max_len;
389 start = buff->server.log_start_addr;
390 break;
391 case BIOS_CLIENT:
392 default:
393 len = buff->client.log_max_len;
394 start = buff->client.log_start_addr;
395 break;
396 }
397 if (!len) {
398 printk(KERN_ERR "%s: ERROR - TCPA log area empty\n", __func__);
399 return -EIO;
400 }
401
402 /* malloc EventLog space */
403 log->bios_event_log = kmalloc(len, GFP_KERNEL);
404 if (!log->bios_event_log) {
405 printk("%s: ERROR - Not enough Memory for BIOS measurements\n",
406 __func__);
407 return -ENOMEM;
408 }
409
410 log->bios_event_log_end = log->bios_event_log + len;
411
412 virt = acpi_os_map_memory(start, len);
413
414 memcpy(log->bios_event_log, virt, len);
415
416 acpi_os_unmap_memory(virt, len);
417 return 0;
418}
419
420static int tpm_ascii_bios_measurements_open(struct inode *inode, 283static int tpm_ascii_bios_measurements_open(struct inode *inode,
421 struct file *file) 284 struct file *file)
422{ 285{
diff --git a/drivers/char/tpm/tpm_eventlog.h b/drivers/char/tpm/tpm_eventlog.h
new file mode 100644
index 000000000000..8e23ccdf8a83
--- /dev/null
+++ b/drivers/char/tpm/tpm_eventlog.h
@@ -0,0 +1,71 @@
1
2#ifndef __TPM_EVENTLOG_H__
3#define __TPM_EVENTLOG_H__
4
5#define TCG_EVENT_NAME_LEN_MAX 255
6#define MAX_TEXT_EVENT 1000 /* Max event string length */
7#define ACPI_TCPA_SIG "TCPA" /* 0x41504354 /'TCPA' */
8
9enum bios_platform_class {
10 BIOS_CLIENT = 0x00,
11 BIOS_SERVER = 0x01,
12};
13
14struct tpm_bios_log {
15 void *bios_event_log;
16 void *bios_event_log_end;
17};
18
19struct tcpa_event {
20 u32 pcr_index;
21 u32 event_type;
22 u8 pcr_value[20]; /* SHA1 */
23 u32 event_size;
24 u8 event_data[0];
25};
26
27enum tcpa_event_types {
28 PREBOOT = 0,
29 POST_CODE,
30 UNUSED,
31 NO_ACTION,
32 SEPARATOR,
33 ACTION,
34 EVENT_TAG,
35 SCRTM_CONTENTS,
36 SCRTM_VERSION,
37 CPU_MICROCODE,
38 PLATFORM_CONFIG_FLAGS,
39 TABLE_OF_DEVICES,
40 COMPACT_HASH,
41 IPL,
42 IPL_PARTITION_DATA,
43 NONHOST_CODE,
44 NONHOST_CONFIG,
45 NONHOST_INFO,
46};
47
48struct tcpa_pc_event {
49 u32 event_id;
50 u32 event_size;
51 u8 event_data[0];
52};
53
54enum tcpa_pc_event_ids {
55 SMBIOS = 1,
56 BIS_CERT,
57 POST_BIOS_ROM,
58 ESCD,
59 CMOS,
60 NVRAM,
61 OPTION_ROM_EXEC,
62 OPTION_ROM_CONFIG,
63 OPTION_ROM_MICROCODE = 10,
64 S_CRTM_VERSION,
65 S_CRTM_CONTENTS,
66 POST_CONTENTS,
67 HOST_TABLE_OF_DEVICES,
68};
69
70int read_log(struct tpm_bios_log *log);
71#endif
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-25 04:14:27 -0500