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 #define DIAG308_FLAGS_LP_VALID 0x80
  60
  61 union IplParameterBlock {
  62     struct {
  63         uint32_t len;
  64         uint8_t  reserved0[3];
  65         uint8_t  version;
  66         uint32_t blk0_len;
  67         uint8_t  pbt;
  68         uint8_t  flags;
  69         uint16_t reserved01;
  70         uint8_t  loadparm[8];
  71         union {
  72             IplBlockCcw ccw;
  73             IplBlockFcp fcp;
  74             IplBlockQemuScsi scsi;
  75         };
  76     } QEMU_PACKED;
  77     struct {
  78         uint8_t  reserved1[110];
  79         uint16_t devno;
  80         uint8_t  reserved2[88];
  81         uint8_t  reserved_ext[4096 - 200];
  82     } QEMU_PACKED;
  83 } QEMU_PACKED;
  84 typedef union IplParameterBlock IplParameterBlock;
  85
  86 int s390_ipl_set_loadparm(uint8_t *loadparm);
  87 void s390_ipl_update_diag308(IplParameterBlock *iplb);
  88 void s390_ipl_prepare_cpu(S390CPU *cpu);
  89 IplParameterBlock *s390_ipl_get_iplb(void);
  90
  91 enum s390_reset {
  92     /* default is a reset not triggered by a CPU e.g. issued by QMP */
  93     S390_RESET_EXTERNAL = 0,
  94     S390_RESET_REIPL,
  95     S390_RESET_MODIFIED_CLEAR,
  96     S390_RESET_LOAD_NORMAL,
  97 };
  98 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type);
  99 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type);
 100 void s390_ipl_clear_reset_request(void);
 101
 102 #define QIPL_ADDRESS  0xcc
 103
 104 /* Boot Menu flags */
 105 #define QIPL_FLAG_BM_OPTS_CMD   0x80
 106 #define QIPL_FLAG_BM_OPTS_ZIPL  0x40
 107
 108 /*
 109  * The QEMU IPL Parameters will be stored at absolute address
 110  * 204 (0xcc) which means it is 32-bit word aligned but not
 111  * double-word aligned.
 112  * Placement of data fields in this area must account for
 113  * their alignment needs. E.g., netboot_start_address must
 114  * have an offset of 4 + n * 8 bytes within the struct in order
 115  * to keep it double-word aligned.
 116  * The total size of the struct must never exceed 28 bytes.
 117  * This definition must be kept in sync with the defininition
 118  * in pc-bios/s390-ccw/iplb.h.
 119  */
 120 struct QemuIplParameters {
 121     uint8_t  qipl_flags;
 122     uint8_t  reserved1[3];
 123     uint64_t netboot_start_addr;
 124     uint32_t boot_menu_timeout;
 125     uint8_t  reserved2[12];
 126 } QEMU_PACKED;
 127 typedef struct QemuIplParameters QemuIplParameters;
 128
 129 #define TYPE_S390_IPL "s390-ipl"
 130 #define S390_IPL(obj) OBJECT_CHECK(S390IPLState, (obj), TYPE_S390_IPL)
 131
 132 struct S390IPLState {
 133     /*< private >*/
 134     DeviceState parent_obj;
 135     IplParameterBlock iplb;
 136     QemuIplParameters qipl;
 137     uint64_t start_addr;
 138     uint64_t compat_start_addr;
 139     uint64_t bios_start_addr;
 140     uint64_t compat_bios_start_addr;
 141     bool enforce_bios;
 142     bool iplb_valid;
 143     bool netboot;
 144     /* reset related properties don't have to be migrated or reset */
 145     enum s390_reset reset_type;
 146     int reset_cpu_index;
 147
 148     /*< public >*/
 149     char *kernel;
 150     char *initrd;
 151     char *cmdline;
 152     char *firmware;
 153     char *netboot_fw;
 154     uint8_t cssid;
 155     uint8_t ssid;
 156     uint16_t devno;
 157     bool iplbext_migration;
 158 };
 159 typedef struct S390IPLState S390IPLState;
 160 QEMU_BUILD_BUG_MSG(offsetof(S390IPLState, iplb) & 3, "alignment of iplb wrong");
 161
 162 #define S390_IPL_TYPE_FCP 0x00
 163 #define S390_IPL_TYPE_CCW 0x02
 164 #define S390_IPL_TYPE_QEMU_SCSI 0xff
 165
 166 #define S390_IPLB_HEADER_LEN 8
 167 #define S390_IPLB_MIN_CCW_LEN 200
 168 #define S390_IPLB_MIN_FCP_LEN 384
 169 #define S390_IPLB_MIN_QEMU_SCSI_LEN 200
 170
 171 static inline bool iplb_valid_len(IplParameterBlock *iplb)
 172 {
 173     return be32_to_cpu(iplb->len) <= sizeof(IplParameterBlock);
 174 }
 175
 176 static inline bool iplb_valid_ccw(IplParameterBlock *iplb)
 177 {
 178     return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_CCW_LEN &&
 179            iplb->pbt == S390_IPL_TYPE_CCW;
 180 }
 181
 182 static inline bool iplb_valid_fcp(IplParameterBlock *iplb)
 183 {
 184     return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_FCP_LEN &&
 185            iplb->pbt == S390_IPL_TYPE_FCP;
 186 }
 187
 188 #endif