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