arch/s390/include/asm/ipl.h

   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 */