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
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
|
// SPDX-License-Identifier: GPL-2.0
/*
* SCLP early driver
*
* Copyright IBM Corp. 2013
*/
#define KMSG_COMPONENT "sclp_early"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/errno.h>
#include <asm/ctl_reg.h>
#include <asm/sclp.h>
#include <asm/ipl.h>
#include "sclp_sdias.h"
#include "sclp.h"
#define SCLP_CMDW_READ_SCP_INFO 0x00020001
#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
struct read_info_sccb {
struct sccb_header header; /* 0-7 */
u16 rnmax; /* 8-9 */
u8 rnsize; /* 10 */
u8 _pad_11[16 - 11]; /* 11-15 */
u16 ncpurl; /* 16-17 */
u16 cpuoff; /* 18-19 */
u8 _pad_20[24 - 20]; /* 20-23 */
u8 loadparm[8]; /* 24-31 */
u8 _pad_32[42 - 32]; /* 32-41 */
u8 fac42; /* 42 */
u8 fac43; /* 43 */
u8 _pad_44[48 - 44]; /* 44-47 */
u64 facilities; /* 48-55 */
u8 _pad_56[66 - 56]; /* 56-65 */
u8 fac66; /* 66 */
u8 _pad_67[76 - 67]; /* 67-83 */
u32 ibc; /* 76-79 */
u8 _pad80[84 - 80]; /* 80-83 */
u8 fac84; /* 84 */
u8 fac85; /* 85 */
u8 _pad_86[91 - 86]; /* 86-90 */
u8 fac91; /* 91 */
u8 _pad_92[98 - 92]; /* 92-97 */
u8 fac98; /* 98 */
u8 hamaxpow; /* 99 */
u32 rnsize2; /* 100-103 */
u64 rnmax2; /* 104-111 */
u8 _pad_112[116 - 112]; /* 112-115 */
u8 fac116; /* 116 */
u8 fac117; /* 117 */
u8 _pad_118; /* 118 */
u8 fac119; /* 119 */
u16 hcpua; /* 120-121 */
u8 _pad_122[124 - 122]; /* 122-123 */
u32 hmfai; /* 124-127 */
u8 _pad_128[4096 - 128]; /* 128-4095 */
} __packed __aligned(PAGE_SIZE);
static struct sclp_ipl_info sclp_ipl_info;
struct sclp_info sclp;
EXPORT_SYMBOL(sclp);
static int __init sclp_early_read_info(struct read_info_sccb *sccb)
{
int i;
sclp_cmdw_t commands[] = {SCLP_CMDW_READ_SCP_INFO_FORCED,
SCLP_CMDW_READ_SCP_INFO};
for (i = 0; i < ARRAY_SIZE(commands); i++) {
memset(sccb, 0, sizeof(*sccb));
sccb->header.length = sizeof(*sccb);
sccb->header.function_code = 0x80;
sccb->header.control_mask[2] = 0x80;
if (sclp_early_cmd(commands[i], sccb))
break;
if (sccb->header.response_code == 0x10)
return 0;
if (sccb->header.response_code != 0x1f0)
break;
}
return -EIO;
}
static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
{
struct sclp_core_entry *cpue;
u16 boot_cpu_address, cpu;
if (sclp_early_read_info(sccb))
return;
sclp.facilities = sccb->facilities;
sclp.has_sprp = !!(sccb->fac84 & 0x02);
sclp.has_core_type = !!(sccb->fac84 & 0x01);
sclp.has_gsls = !!(sccb->fac85 & 0x80);
sclp.has_64bscao = !!(sccb->fac116 & 0x80);
sclp.has_cmma = !!(sccb->fac116 & 0x40);
sclp.has_esca = !!(sccb->fac116 & 0x08);
sclp.has_pfmfi = !!(sccb->fac117 & 0x40);
sclp.has_ibs = !!(sccb->fac117 & 0x20);
sclp.has_hvs = !!(sccb->fac119 & 0x80);
sclp.has_kss = !!(sccb->fac98 & 0x01);
if (sccb->fac85 & 0x02)
S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
if (sccb->fac91 & 0x40)
S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST;
sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
sclp.rzm <<= 20;
sclp.ibc = sccb->ibc;
if (sccb->hamaxpow && sccb->hamaxpow < 64)
sclp.hamax = (1UL << sccb->hamaxpow) - 1;
else
sclp.hamax = U64_MAX;
if (!sccb->hcpua) {
if (MACHINE_IS_VM)
sclp.max_cores = 64;
else
sclp.max_cores = sccb->ncpurl;
} else {
sclp.max_cores = sccb->hcpua + 1;
}
boot_cpu_address = stap();
cpue = (void *)sccb + sccb->cpuoff;
for (cpu = 0; cpu < sccb->ncpurl; cpue++, cpu++) {
if (boot_cpu_address != cpue->core_id)
continue;
sclp.has_siif = cpue->siif;
sclp.has_sigpif = cpue->sigpif;
sclp.has_sief2 = cpue->sief2;
sclp.has_gpere = cpue->gpere;
sclp.has_ib = cpue->ib;
sclp.has_cei = cpue->cei;
sclp.has_skey = cpue->skey;
break;
}
/* Save IPL information */
sclp_ipl_info.is_valid = 1;
if (sccb->fac91 & 0x2)
sclp_ipl_info.has_dump = 1;
memcpy(&sclp_ipl_info.loadparm, &sccb->loadparm, LOADPARM_LEN);
sclp.mtid = (sccb->fac42 & 0x80) ? (sccb->fac42 & 31) : 0;
sclp.mtid_cp = (sccb->fac42 & 0x80) ? (sccb->fac43 & 31) : 0;
sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
sclp.hmfai = sccb->hmfai;
}
/*
* This function will be called after sclp_early_facilities_detect(), which gets
* called from early.c code. The sclp_early_facilities_detect() function retrieves
* and saves the IPL information.
*/
void __init sclp_early_get_ipl_info(struct sclp_ipl_info *info)
{
*info = sclp_ipl_info;
}
static struct sclp_core_info sclp_early_core_info __initdata;
static int sclp_early_core_info_valid __initdata;
static void __init sclp_early_init_core_info(struct read_cpu_info_sccb *sccb)
{
if (!SCLP_HAS_CPU_INFO)
return;
memset(sccb, 0, sizeof(*sccb));
sccb->header.length = sizeof(*sccb);
if (sclp_early_cmd(SCLP_CMDW_READ_CPU_INFO, sccb))
return;
if (sccb->header.response_code != 0x0010)
return;
sclp_fill_core_info(&sclp_early_core_info, sccb);
sclp_early_core_info_valid = 1;
}
int __init sclp_early_get_core_info(struct sclp_core_info *info)
{
if (!sclp_early_core_info_valid)
return -EIO;
*info = sclp_early_core_info;
return 0;
}
static long __init sclp_early_hsa_size_init(struct sdias_sccb *sccb)
{
memset(sccb, 0, sizeof(*sccb));
sccb->hdr.length = sizeof(*sccb);
sccb->evbuf.hdr.length = sizeof(struct sdias_evbuf);
sccb->evbuf.hdr.type = EVTYP_SDIAS;
sccb->evbuf.event_qual = SDIAS_EQ_SIZE;
sccb->evbuf.data_id = SDIAS_DI_FCP_DUMP;
sccb->evbuf.event_id = 4712;
sccb->evbuf.dbs = 1;
if (sclp_early_cmd(SCLP_CMDW_WRITE_EVENT_DATA, sccb))
return -EIO;
if (sccb->hdr.response_code != 0x20)
return -EIO;
if (sccb->evbuf.blk_cnt == 0)
return 0;
return (sccb->evbuf.blk_cnt - 1) * PAGE_SIZE;
}
static long __init sclp_early_hsa_copy_wait(struct sdias_sccb *sccb)
{
memset(sccb, 0, PAGE_SIZE);
sccb->hdr.length = PAGE_SIZE;
if (sclp_early_cmd(SCLP_CMDW_READ_EVENT_DATA, sccb))
return -EIO;
if ((sccb->hdr.response_code != 0x20) && (sccb->hdr.response_code != 0x220))
return -EIO;
if (sccb->evbuf.blk_cnt == 0)
return 0;
return (sccb->evbuf.blk_cnt - 1) * PAGE_SIZE;
}
static void __init sclp_early_hsa_size_detect(void *sccb)
{
unsigned long flags;
long size = -EIO;
raw_local_irq_save(flags);
if (sclp_early_set_event_mask(sccb, EVTYP_SDIAS_MASK, EVTYP_SDIAS_MASK))
goto out;
size = sclp_early_hsa_size_init(sccb);
/* First check for synchronous response (LPAR) */
if (size)
goto out_mask;
if (!(S390_lowcore.ext_params & 1))
sclp_early_wait_irq();
size = sclp_early_hsa_copy_wait(sccb);
out_mask:
sclp_early_set_event_mask(sccb, 0, 0);
out:
raw_local_irq_restore(flags);
if (size > 0)
sclp.hsa_size = size;
}
static void __init sclp_early_console_detect(struct init_sccb *sccb)
{
if (sccb->header.response_code != 0x20)
return;
if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK)
sclp.has_vt220 = 1;
if (sclp_early_con_check_linemode(sccb))
sclp.has_linemode = 1;
}
void __init sclp_early_detect(void)
{
void *sccb = &sclp_early_sccb;
sclp_early_facilities_detect(sccb);
sclp_early_init_core_info(sccb);
sclp_early_hsa_size_detect(sccb);
/*
* Turn off SCLP event notifications. Also save remote masks in the
* sccb. These are sufficient to detect sclp console capabilities.
*/
sclp_early_set_event_mask(sccb, 0, 0);
sclp_early_console_detect(sccb);
}
|
