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     uint64_t netboot_start_addr;
  20     uint8_t  reserved0[77];
  21     uint8_t  ssid;
  22     uint16_t devno;
  23     uint8_t  vm_flags;
  24     uint8_t  reserved3[3];
  25     uint32_t vm_parm_len;
  26     uint8_t  nss_name[8];
  27     uint8_t  vm_parm[64];
  28     uint8_t  reserved4[8];
  29 } QEMU_PACKED;
  30 typedef struct IplBlockCcw IplBlockCcw;
  31
  32 struct IplBlockFcp {
  33     uint8_t  reserved1[305 - 1];
  34     uint8_t  opt;
  35     uint8_t  reserved2[3];
  36     uint16_t reserved3;
  37     uint16_t devno;
  38     uint8_t  reserved4[4];
  39     uint64_t wwpn;
  40     uint64_t lun;
  41     uint32_t bootprog;
  42     uint8_t  reserved5[12];
  43     uint64_t br_lba;
  44     uint32_t scp_data_len;
  45     uint8_t  reserved6[260];
  46     uint8_t  scp_data[];
  47 } QEMU_PACKED;
  48 typedef struct IplBlockFcp IplBlockFcp;
  49
  50 struct IplBlockQemuScsi {
  51     uint32_t lun;
  52     uint16_t target;
  53     uint16_t channel;
  54     uint8_t  reserved0[77];
  55     uint8_t  ssid;
  56     uint16_t devno;
  57 } QEMU_PACKED;
  58 typedef struct IplBlockQemuScsi IplBlockQemuScsi;
  59
  60 union IplParameterBlock {
  61     struct {
  62         uint32_t len;
  63         uint8_t  reserved0[3];
  64         uint8_t  version;
  65         uint32_t blk0_len;
  66         uint8_t  pbt;
  67         uint8_t  flags;
  68         uint16_t reserved01;
  69         uint8_t  loadparm[8];
  70         union {
  71             IplBlockCcw ccw;
  72             IplBlockFcp fcp;
  73             IplBlockQemuScsi scsi;
  74         };
  75     } QEMU_PACKED;
  76     struct {
  77         uint8_t  reserved1[110];
  78         uint16_t devno;
  79         uint8_t  reserved2[88];
  80         uint8_t  reserved_ext[4096 - 200];
  81     } QEMU_PACKED;
  82 } QEMU_PACKED;
  83 typedef union IplParameterBlock IplParameterBlock;
  84
  85 void s390_ipl_update_diag308(IplParameterBlock *iplb);
  86 void s390_ipl_prepare_cpu(S390CPU *cpu);
  87 IplParameterBlock *s390_ipl_get_iplb(void);
  88 void s390_reipl_request(void);
  89
  90 #define TYPE_S390_IPL "s390-ipl"
  91 #define S390_IPL(obj) OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL)
  92
  93 struct S390IPLState {
  94     /*< private >*/
  95     DeviceState parent_obj;
  96     uint64_t start_addr;
  97     uint64_t compat_start_addr;
  98     uint64_t bios_start_addr;
  99     uint64_t compat_bios_start_addr;
 100     bool enforce_bios;
 101     IplParameterBlock iplb;
 102     bool iplb_valid;
 103     bool reipl_requested;
 104     bool netboot;
 105
 106     /*< public >*/
 107     char *kernel;
 108     char *initrd;
 109     char *cmdline;
 110     char *firmware;
 111     char *netboot_fw;
 112     uint8_t cssid;
 113     uint8_t ssid;
 114     uint16_t devno;
 115     bool iplbext_migration;
 116 };
 117 typedef struct S390IPLState S390IPLState;
 118
 119 #define S390_IPL_TYPE_FCP 0x00
 120 #define S390_IPL_TYPE_CCW 0x02
 121 #define S390_IPL_TYPE_QEMU_SCSI 0xff
 122
 123 #define S390_IPLB_HEADER_LEN 8
 124 #define S390_IPLB_MIN_CCW_LEN 200
 125 #define S390_IPLB_MIN_FCP_LEN 384
 126 #define S390_IPLB_MIN_QEMU_SCSI_LEN 200
 127
 128 static inline bool iplb_valid_len(IplParameterBlock *iplb)
 129 {
 130     return be32_to_cpu(iplb->len) <= sizeof(IplParameterBlock);
 131 }
 132
 133 static inline bool iplb_valid_ccw(IplParameterBlock *iplb)
 134 {
 135     return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_CCW_LEN &&
 136            iplb->pbt == S390_IPL_TYPE_CCW;
 137 }
 138
 139 static inline bool iplb_valid_fcp(IplParameterBlock *iplb)
 140 {
 141     return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_FCP_LEN &&
 142            iplb->pbt == S390_IPL_TYPE_FCP;
 143 }
 144
 145 #endif