linux/arch/s390/include/asm/ipl.h
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   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
  17struct 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
  52struct save_area;
  53struct save_area * __init save_area_alloc(bool is_boot_cpu);
  54struct save_area * __init save_area_boot_cpu(void);
  55void __init save_area_add_regs(struct save_area *, void *regs);
  56void __init save_area_add_vxrs(struct save_area *, __vector128 *vxrs);
  57
  58extern void s390_reset_system(void);
  59extern size_t ipl_block_get_ascii_vmparm(char *dest, size_t size,
  60                                         const struct ipl_parameter_block *ipb);
  61
  62enum 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
  72struct 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
  94extern struct ipl_info ipl_info;
  95extern void setup_ipl(void);
  96extern void set_os_info_reipl_block(void);
  97
  98static 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
 104struct ipl_report {
 105        struct ipl_parameter_block *ipib;
 106        struct list_head components;
 107        struct list_head certificates;
 108        size_t size;
 109};
 110
 111struct ipl_report_component {
 112        struct list_head list;
 113        struct ipl_rb_component_entry entry;
 114};
 115
 116struct ipl_report_certificate {
 117        struct list_head list;
 118        struct ipl_rb_certificate_entry entry;
 119        void *key;
 120};
 121
 122struct kexec_buf;
 123struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib);
 124void *ipl_report_finish(struct ipl_report *report);
 125int ipl_report_free(struct ipl_report *report);
 126int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
 127                             unsigned char flags, unsigned short cert);
 128int ipl_report_add_certificate(struct ipl_report *report, void *key,
 129                               unsigned long addr, unsigned long len);
 130
 131/*
 132 * DIAG 308 support
 133 */
 134enum 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
 143enum diag308_rc {
 144        DIAG308_RC_OK           = 0x0001,
 145        DIAG308_RC_NOCONFIG     = 0x0102,
 146};
 147
 148extern int diag308(unsigned long subcode, void *addr);
 149extern void store_status(void (*fn)(void *), void *data);
 150extern void lgr_info_log(void);
 151
 152#endif /* _ASM_S390_IPL_H */
 153
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