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 <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
  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 */