1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * s390 (re)ipl support
4 *
5 * Copyright IBM Corp. 2007
6 */
7
8 #ifndef _ASM_S390_IPL_H
9 #define _ASM_S390_IPL_H
10
11 #include <asm/lowcore.h>
12 #include <asm/types.h>
13 #include <asm/cio.h>
14 #include <asm/setup.h>
15 #include <asm/page.h>
16 #include <uapi/asm/ipl.h>
17
18 struct ipl_parameter_block {
19 struct ipl_pl_hdr hdr;
20 union {
21 struct ipl_pb_hdr pb0_hdr;
22 struct ipl_pb0_common common;
23 struct ipl_pb0_fcp fcp;
24 struct ipl_pb0_ccw ccw;
25 struct ipl_pb0_eckd eckd;
26 struct ipl_pb0_nvme nvme;
27 char raw[PAGE_SIZE - sizeof(struct ipl_pl_hdr)];
28 };
29 } __packed __aligned(PAGE_SIZE);
30
31 #define NSS_NAME_SIZE 8
32
33 #define IPL_BP_FCP_LEN (sizeof(struct ipl_pl_hdr) + \
34 sizeof(struct ipl_pb0_fcp))
35 #define IPL_BP0_FCP_LEN (sizeof(struct ipl_pb0_fcp))
36
37 #define IPL_BP_NVME_LEN (sizeof(struct ipl_pl_hdr) + \
38 sizeof(struct ipl_pb0_nvme))
39 #define IPL_BP0_NVME_LEN (sizeof(struct ipl_pb0_nvme))
40
41 #define IPL_BP_CCW_LEN (sizeof(struct ipl_pl_hdr) + \
42 sizeof(struct ipl_pb0_ccw))
43 #define IPL_BP0_CCW_LEN (sizeof(struct ipl_pb0_ccw))
44
45 #define IPL_BP_ECKD_LEN (sizeof(struct ipl_pl_hdr) + \
46 sizeof(struct ipl_pb0_eckd))
47 #define IPL_BP0_ECKD_LEN (sizeof(struct ipl_pb0_eckd))
48
49 #define IPL_MAX_SUPPORTED_VERSION (0)
50
51 #define IPL_RB_CERT_UNKNOWN ((unsigned short)-1)
52
53 #define DIAG308_VMPARM_SIZE (64)
54 #define DIAG308_SCPDATA_OFFSET offsetof(struct ipl_parameter_block, \
55 fcp.scp_data)
56 #define DIAG308_SCPDATA_SIZE (PAGE_SIZE - DIAG308_SCPDATA_OFFSET)
57
58 struct save_area;
59 struct save_area * __init save_area_alloc(bool is_boot_cpu);
60 struct save_area * __init save_area_boot_cpu(void);
61 void __init save_area_add_regs(struct save_area *, void *regs);
62 void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
63
64 extern void s390_reset_system(void);
65 extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
66 const struct ipl_parameter_block *ipb);
67
68 enum ipl_type {
69 IPL_TYPE_UNKNOWN = 1,
70 IPL_TYPE_CCW = 2,
71 IPL_TYPE_FCP = 4,
72 IPL_TYPE_FCP_DUMP = 8,
73 IPL_TYPE_NSS = 16,
74 IPL_TYPE_NVME = 32,
75 IPL_TYPE_NVME_DUMP = 64,
76 IPL_TYPE_ECKD = 128,
77 IPL_TYPE_ECKD_DUMP = 256,
78 };
79
80 struct ipl_info
81 {
82 enum ipl_type type;
83 union {
84 struct {
85 struct ccw_dev_id dev_id;
86 } ccw;
87 struct {
88 struct ccw_dev_id dev_id;
89 } eckd;
90 struct {
91 struct ccw_dev_id dev_id;
92 u64 wwpn;
93 u64 lun;
94 } fcp;
95 struct {
96 u32 fid;
97 u32 nsid;
98 } nvme;
99 struct {
100 char name[NSS_NAME_SIZE + 1];
101 } nss;
102 } data;
103 };
104
105 extern struct ipl_info ipl_info;
106 extern void setup_ipl(void);
107 extern void set_os_info_reipl_block(void);
108
109 static inline bool is_ipl_type_dump(void)
110 {
111 return (ipl_info.type == IPL_TYPE_FCP_DUMP) ||
112 (ipl_info.type == IPL_TYPE_ECKD_DUMP) ||
113 (ipl_info.type == IPL_TYPE_NVME_DUMP);
114 }
115
116 struct ipl_report {
117 struct ipl_parameter_block *ipib;
118 struct list_head components;
119 struct list_head certificates;
120 size_t size;
121 };
122
123 struct ipl_report_component {
124 struct list_head list;
125 struct ipl_rb_component_entry entry;
126 };
127
128 struct ipl_report_certificate {
129 struct list_head list;
130 struct ipl_rb_certificate_entry entry;
131 void *key;
132 };
133
134 struct kexec_buf;
135 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib);
136 void *ipl_report_finish(struct ipl_report *report);
137 int ipl_report_free(struct ipl_report *report);
138 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
139 unsigned char flags, unsigned short cert);
140 int ipl_report_add_certificate(struct ipl_report *report, void *key,
141 unsigned long addr, unsigned long len);
142
143 /*
144 * DIAG 308 support
145 */
146 enum diag308_subcode {
147 DIAG308_CLEAR_RESET = 0,
148 DIAG308_LOAD_NORMAL_RESET = 1,
149 DIAG308_REL_HSA = 2,
150 DIAG308_LOAD_CLEAR = 3,
151 DIAG308_LOAD_NORMAL_DUMP = 4,
152 DIAG308_SET = 5,
153 DIAG308_STORE = 6,
154 DIAG308_LOAD_NORMAL = 7,
155 };
156
157 enum diag308_subcode_flags {
158 DIAG308_FLAG_EI = 1UL << 16,
159 };
160
161 enum diag308_rc {
162 DIAG308_RC_OK = 0x0001,
163 DIAG308_RC_NOCONFIG = 0x0102,
164 };
165
166 extern int diag308(unsigned long subcode, void *addr);
167 extern void store_status(void (*fn)(void *), void *data);
168 extern void lgr_info_log(void);
169
170 #endif /* _ASM_S390_IPL_H */
171
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