1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include "2api.h"
#include <arch/hlt.h>
#include <bl_uapp/bl_errorcodes_public.h>
#include <bl_uapp/bl_syscall_public.h>
#include <boot_device.h>
#include <cbfs.h>
#include <console/console.h>
#include <psp_verstage.h>
#include <security/vboot/misc.h>
#include <security/vboot/vbnv.h>
#define PSP_FW_HASH_FILE_NAME(slot, id) "apu/amdfw_" slot "_hash" id
/*
* We can't pass pointer to hash table in the SPI.
* The AMD PSP team specifically required that whole hash table
* should be copied into memory before passing them to the PSP
* to reduce window of TOCTOU.
*/
#define MAX_NUM_HASH_ENTRIES 64
static struct psp_fw_hash_table hash_table;
static struct psp_fw_entry_hash_256 hash_256[MAX_NUM_HASH_ENTRIES];
static struct psp_fw_entry_hash_384 hash_384[MAX_NUM_HASH_ENTRIES];
static struct psp_fw_hash_table_v2 hash_table_v2;
static struct psp_fw_entry_hash_256_v2 hash_256_v2[MAX_NUM_HASH_ENTRIES];
static struct psp_fw_entry_hash_384_v2 hash_384_v2[MAX_NUM_HASH_ENTRIES];
static void update_one_psp_fw_hash_table_v1(enum verstage_cmd_id cmd, uint8_t *spi_ptr)
{
uint32_t len;
memcpy(&hash_table, spi_ptr, offsetof(struct psp_fw_hash_table, fw_hash_256));
if (hash_table.no_of_entries_256 > MAX_NUM_HASH_ENTRIES ||
hash_table.no_of_entries_384 > MAX_NUM_HASH_ENTRIES) {
printk(BIOS_ERR, "Too many entries in AMD Firmware hash table"
" (SHA256:%d, SHA384:%d)\n", hash_table.no_of_entries_256,
hash_table.no_of_entries_384);
return;
}
if (hash_table.no_of_entries_256 == 0 && hash_table.no_of_entries_384 == 0) {
printk(BIOS_ERR, "No entries in AMD Firmware hash table"
" (SHA256:%d, SHA384:%d)\n", hash_table.no_of_entries_256,
hash_table.no_of_entries_384);
return;
}
spi_ptr += offsetof(struct psp_fw_hash_table, fw_hash_256);
hash_table.fw_hash_256 = hash_256;
hash_table.fw_hash_384 = hash_384;
len = sizeof(struct psp_fw_entry_hash_256) * hash_table.no_of_entries_256;
memcpy(hash_256, spi_ptr, len);
spi_ptr += len;
len = sizeof(struct psp_fw_entry_hash_384) * hash_table.no_of_entries_384;
memcpy(hash_384, spi_ptr, len);
svc_set_fw_hash_table(cmd, &hash_table);
}
static void update_one_psp_fw_hash_table_v2(enum verstage_cmd_id cmd, uint8_t *spi_ptr)
{
uint32_t len;
memcpy(&hash_table_v2, spi_ptr, offsetof(struct psp_fw_hash_table_v2, fw_hash_256));
if (hash_table_v2.no_of_entries_256 > MAX_NUM_HASH_ENTRIES ||
hash_table_v2.no_of_entries_384 > MAX_NUM_HASH_ENTRIES) {
printk(BIOS_ERR, "Too many entries in AMD Firmware hash table"
" (SHA256:%d, SHA384:%d)\n", hash_table_v2.no_of_entries_256,
hash_table_v2.no_of_entries_384);
return;
}
if (hash_table_v2.no_of_entries_256 == 0 && hash_table_v2.no_of_entries_384 == 0) {
printk(BIOS_ERR, "No entries in AMD Firmware hash table"
" (SHA256:%d, SHA384:%d)\n", hash_table_v2.no_of_entries_256,
hash_table_v2.no_of_entries_384);
return;
}
spi_ptr += offsetof(struct psp_fw_hash_table_v2, fw_hash_256);
hash_table_v2.fw_hash_256 = hash_256_v2;
hash_table_v2.fw_hash_384 = hash_384_v2;
len = sizeof(struct psp_fw_entry_hash_256_v2) * hash_table_v2.no_of_entries_256;
memcpy(hash_256_v2, spi_ptr, len);
spi_ptr += len;
len = sizeof(struct psp_fw_entry_hash_384_v2) * hash_table_v2.no_of_entries_384;
memcpy(hash_384_v2, spi_ptr, len);
svc_set_fw_hash_table(cmd, &hash_table_v2);
}
static void update_one_psp_fw_hash_table(enum verstage_cmd_id cmd, const char *fname)
{
void *hash_file = cbfs_map(fname, NULL);
uint16_t version;
if (!hash_file) {
printk(BIOS_ERR, "AMD Firmware hash table %s not found\n", fname);
/*
* If we don't supply hash table, the PSP will refuse to boot.
* So returning here is safe to do.
*/
return;
}
memcpy(&version, hash_file, sizeof(version));
assert(version <= 2);
switch (version) {
case 1:
update_one_psp_fw_hash_table_v1(cmd, hash_file);
break;
case 2:
update_one_psp_fw_hash_table_v2(cmd, hash_file);
break;
default:
printk(BIOS_ERR, "%s: Unexpected version %d\n", __func__, version);
}
cbfs_unmap(hash_file);
rdev_munmap(boot_device_ro(), hash_file);
}
void update_psp_fw_hash_tables(void)
{
struct vb2_context *ctx = vboot_get_context();
if (vboot_is_firmware_slot_a(ctx)) {
update_one_psp_fw_hash_table(CMD_SET_FW_HASH_TABLE_STAGE1,
PSP_FW_HASH_FILE_NAME("a", ""));
update_one_psp_fw_hash_table(CMD_SET_FW_HASH_TABLE_STAGE2,
PSP_FW_HASH_FILE_NAME("a", "1"));
update_one_psp_fw_hash_table(CMD_SET_FW_HASH_TABLE_TOS,
PSP_FW_HASH_FILE_NAME("a", "2"));
} else {
update_one_psp_fw_hash_table(CMD_SET_FW_HASH_TABLE_STAGE1,
PSP_FW_HASH_FILE_NAME("b", ""));
update_one_psp_fw_hash_table(CMD_SET_FW_HASH_TABLE_STAGE2,
PSP_FW_HASH_FILE_NAME("b", "1"));
update_one_psp_fw_hash_table(CMD_SET_FW_HASH_TABLE_TOS,
PSP_FW_HASH_FILE_NAME("b", "2"));
}
}
uint32_t update_psp_bios_dir(uint32_t *psp_dir_offset, uint32_t *bios_dir_offset)
{
return svc_update_psp_bios_dir(psp_dir_offset, bios_dir_offset);
}
uint32_t save_uapp_data(void *address, uint32_t size)
{
return svc_save_uapp_data(address, size);
}
uint32_t get_bios_dir_addr(struct embedded_firmware *ef_table)
{
return 0;
}
int platform_set_sha_op(enum vb2_hash_algorithm hash_alg,
struct sha_generic_data *sha_op)
{
if (hash_alg == VB2_HASH_SHA256) {
sha_op->SHAType = SHA_TYPE_256;
sha_op->DigestLen = 32;
} else if (hash_alg == VB2_HASH_SHA384) {
sha_op->SHAType = SHA_TYPE_384;
sha_op->DigestLen = 48;
} else {
return -1;
}
return 0;
}
void platform_report_mode(int developer_mode_enabled)
{
printk(BIOS_INFO, "Reporting %s mode\n",
developer_mode_enabled ? "Developer" : "Normal");
if (developer_mode_enabled)
svc_set_platform_boot_mode(CHROME_BOOK_BOOT_MODE_DEVELOPER);
else
svc_set_platform_boot_mode(CHROME_BOOK_BOOT_MODE_NORMAL);
}
void report_prev_boot_status_to_vboot(void)
{
uint32_t boot_status = 0;
int ret;
struct vb2_context *ctx = vboot_get_context();
/* Already in recovery mode. No need to report previous boot status. */
if (ctx->flags & VB2_CONTEXT_RECOVERY_MODE)
return;
ret = svc_get_prev_boot_status(&boot_status);
if (ret != BL_OK || boot_status) {
printk(BIOS_ERR, "PSPFW failure in previous boot: %d:%#8x\n", ret, boot_status);
vbnv_init();
vb2api_previous_boot_fail(ctx, VB2_RECOVERY_FW_VENDOR_BLOB,
boot_status ? (int)boot_status : ret);
}
}
void report_hsp_secure_state(void)
{
uint32_t hsp_secure_state;
int ret;
ret = svc_get_hsp_secure_state(&hsp_secure_state);
if (ret != BL_OK) {
printk(BIOS_ERR, "Error reading HSP Secure state: %d\n", ret);
hlt();
}
printk(BIOS_INFO, "HSP Secure state: %#8x\n", hsp_secure_state);
}
|
