hw/s390x/ipl.h

   1 /*
   2  * s390 IPL device
   3  *
   4  * Copyright 2015 IBM Corp.
   5  * Author(s): Zhang Fan <bjfanzh@cn.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #ifndef HW_S390_IPL_H
  13 #define HW_S390_IPL_H
  14
  15 #include "hw/qdev.h"
  16 #include "cpu.h"
  17
  18 struct IplBlockCcw {
  19     uint8_t  reserved0[85];
  20     uint8_t  ssid;
  21     uint16_t devno;
  22     uint8_t  vm_flags;
  23     uint8_t  reserved3[3];
  24     uint32_t vm_parm_len;
  25     uint8_t  nss_name[8];
  26     uint8_t  vm_parm[64];
  27     uint8_t  reserved4[8];
  28 } QEMU_PACKED;
  29 typedef struct IplBlockCcw IplBlockCcw;
  30
  31 struct IplBlockFcp {
  32     uint8_t  reserved1[305 - 1];
  33     uint8_t  opt;
  34     uint8_t  reserved2[3];
  35     uint16_t reserved3;
  36     uint16_t devno;
  37     uint8_t  reserved4[4];
  38     uint64_t wwpn;
  39     uint64_t lun;
  40     uint32_t bootprog;
  41     uint8_t  reserved5[12];
  42     uint64_t br_lba;
  43     uint32_t scp_data_len;
  44     uint8_t  reserved6[260];
  45     uint8_t  scp_data[];
  46 } QEMU_PACKED;
  47 typedef struct IplBlockFcp IplBlockFcp;
  48
  49 struct IplBlockQemuScsi {
  50     uint32_t lun;
  51     uint16_t target;
  52     uint16_t channel;
  53     uint8_t  reserved0[77];
  54     uint8_t  ssid;
  55     uint16_t devno;
  56 } QEMU_PACKED;
  57 typedef struct IplBlockQemuScsi IplBlockQemuScsi;
  58
  59 union IplParameterBlock {
  60     struct {
  61         uint32_t len;
  62         uint8_t  reserved0[3];
  63         uint8_t  version;
  64         uint32_t blk0_len;
  65         uint8_t  pbt;
  66         uint8_t  flags;
  67         uint16_t reserved01;
  68         uint8_t  loadparm[8];
  69         union {
  70             IplBlockCcw ccw;
  71             IplBlockFcp fcp;
  72             IplBlockQemuScsi scsi;
  73         };
  74     } QEMU_PACKED;
  75     struct {
  76         uint8_t  reserved1[110];
  77         uint16_t devno;
  78         uint8_t  reserved2[88];
  79         uint8_t  reserved_ext[4096 - 200];
  80     } QEMU_PACKED;
  81 } QEMU_PACKED;
  82 typedef union IplParameterBlock IplParameterBlock;
  83
  84 void s390_ipl_update_diag308(IplParameterBlock *iplb);
  85 void s390_ipl_prepare_cpu(S390CPU *cpu);
  86 IplParameterBlock *s390_ipl_get_iplb(void);
  87 void s390_reipl_request(void);
  88
  89 #define TYPE_S390_IPL "s390-ipl"
  90 #define S390_IPL(obj) OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL)
  91
  92 struct S390IPLState {
  93     /*< private >*/
  94     DeviceState parent_obj;
  95     uint64_t start_addr;
  96     uint64_t compat_start_addr;
  97     uint64_t bios_start_addr;
  98     uint64_t compat_bios_start_addr;
  99     bool enforce_bios;
 100     IplParameterBlock iplb;
 101     bool iplb_valid;
 102     bool reipl_requested;
 103
 104     /*< public >*/
 105     char *kernel;
 106     char *initrd;
 107     char *cmdline;
 108     char *firmware;
 109     uint8_t cssid;
 110     uint8_t ssid;
 111     uint16_t devno;
 112     bool iplbext_migration;
 113 };
 114 typedef struct S390IPLState S390IPLState;
 115
 116 #define S390_IPL_TYPE_FCP 0x00
 117 #define S390_IPL_TYPE_CCW 0x02
 118 #define S390_IPL_TYPE_QEMU_SCSI 0xff
 119
 120 #define S390_IPLB_HEADER_LEN 8
 121 #define S390_IPLB_MIN_CCW_LEN 200
 122 #define S390_IPLB_MIN_FCP_LEN 384
 123 #define S390_IPLB_MIN_QEMU_SCSI_LEN 200
 124
 125 static inline bool iplb_valid_len(IplParameterBlock *iplb)
 126 {
 127     return be32_to_cpu(iplb->len) <= sizeof(IplParameterBlock);
 128 }
 129
 130 static inline bool iplb_valid_ccw(IplParameterBlock *iplb)
 131 {
 132     return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_CCW_LEN &&
 133            iplb->pbt == S390_IPL_TYPE_CCW;
 134 }
 135
 136 static inline bool iplb_valid_fcp(IplParameterBlock *iplb)
 137 {
 138     return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_FCP_LEN &&
 139            iplb->pbt == S390_IPL_TYPE_FCP;
 140 }
 141
 142 #endif