xref: /openbmc/linux/arch/s390/include/asm/ipl.h (revision e2d2a296)
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 
is_ipl_type_dump(void)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