1 /* 2 * s390 IPL device 3 * 4 * Copyright 2015, 2020 IBM Corp. 5 * Author(s): Zhang Fan <bjfanzh@cn.ibm.com> 6 * Janosch Frank <frankja@linux.ibm.com> 7 * 8 * This work is licensed under the terms of the GNU GPL, version 2 or (at 9 * your option) any later version. See the COPYING file in the top-level 10 * directory. 11 */ 12 13 #ifndef HW_S390_IPL_H 14 #define HW_S390_IPL_H 15 16 #include "cpu.h" 17 #include "exec/address-spaces.h" 18 #include "hw/qdev-core.h" 19 #include "qom/object.h" 20 21 struct IPLBlockPVComp { 22 uint64_t tweak_pref; 23 uint64_t addr; 24 uint64_t size; 25 } QEMU_PACKED; 26 typedef struct IPLBlockPVComp IPLBlockPVComp; 27 28 struct IPLBlockPV { 29 uint8_t reserved18[87]; /* 0x18 */ 30 uint8_t version; /* 0x6f */ 31 uint32_t reserved70; /* 0x70 */ 32 uint32_t num_comp; /* 0x74 */ 33 uint64_t pv_header_addr; /* 0x78 */ 34 uint64_t pv_header_len; /* 0x80 */ 35 struct IPLBlockPVComp components[0]; 36 } QEMU_PACKED; 37 typedef struct IPLBlockPV IPLBlockPV; 38 39 struct IplBlockCcw { 40 uint8_t reserved0[85]; 41 uint8_t ssid; 42 uint16_t devno; 43 uint8_t vm_flags; 44 uint8_t reserved3[3]; 45 uint32_t vm_parm_len; 46 uint8_t nss_name[8]; 47 uint8_t vm_parm[64]; 48 uint8_t reserved4[8]; 49 } QEMU_PACKED; 50 typedef struct IplBlockCcw IplBlockCcw; 51 52 struct IplBlockFcp { 53 uint8_t reserved1[305 - 1]; 54 uint8_t opt; 55 uint8_t reserved2[3]; 56 uint16_t reserved3; 57 uint16_t devno; 58 uint8_t reserved4[4]; 59 uint64_t wwpn; 60 uint64_t lun; 61 uint32_t bootprog; 62 uint8_t reserved5[12]; 63 uint64_t br_lba; 64 uint32_t scp_data_len; 65 uint8_t reserved6[260]; 66 uint8_t scp_data[0]; 67 } QEMU_PACKED; 68 typedef struct IplBlockFcp IplBlockFcp; 69 70 struct IplBlockQemuScsi { 71 uint32_t lun; 72 uint16_t target; 73 uint16_t channel; 74 uint8_t reserved0[77]; 75 uint8_t ssid; 76 uint16_t devno; 77 } QEMU_PACKED; 78 typedef struct IplBlockQemuScsi IplBlockQemuScsi; 79 80 #define DIAG308_FLAGS_LP_VALID 0x80 81 82 union IplParameterBlock { 83 struct { 84 uint32_t len; 85 uint8_t reserved0[3]; 86 uint8_t version; 87 uint32_t blk0_len; 88 uint8_t pbt; 89 uint8_t flags; 90 uint16_t reserved01; 91 uint8_t loadparm[8]; 92 union { 93 IplBlockCcw ccw; 94 IplBlockFcp fcp; 95 IPLBlockPV pv; 96 IplBlockQemuScsi scsi; 97 }; 98 } QEMU_PACKED; 99 struct { 100 uint8_t reserved1[110]; 101 uint16_t devno; 102 uint8_t reserved2[88]; 103 uint8_t reserved_ext[4096 - 200]; 104 } QEMU_PACKED; 105 } QEMU_PACKED; 106 typedef union IplParameterBlock IplParameterBlock; 107 108 int s390_ipl_set_loadparm(uint8_t *loadparm); 109 void s390_ipl_update_diag308(IplParameterBlock *iplb); 110 int s390_ipl_prepare_pv_header(Error **errp); 111 int s390_ipl_pv_unpack(void); 112 void s390_ipl_prepare_cpu(S390CPU *cpu); 113 IplParameterBlock *s390_ipl_get_iplb(void); 114 IplParameterBlock *s390_ipl_get_iplb_pv(void); 115 116 enum s390_reset { 117 /* default is a reset not triggered by a CPU e.g. issued by QMP */ 118 S390_RESET_EXTERNAL = 0, 119 S390_RESET_REIPL, 120 S390_RESET_MODIFIED_CLEAR, 121 S390_RESET_LOAD_NORMAL, 122 S390_RESET_PV, 123 }; 124 void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type); 125 void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset_type); 126 void s390_ipl_clear_reset_request(void); 127 128 #define QIPL_ADDRESS 0xcc 129 130 /* Boot Menu flags */ 131 #define QIPL_FLAG_BM_OPTS_CMD 0x80 132 #define QIPL_FLAG_BM_OPTS_ZIPL 0x40 133 134 /* 135 * The QEMU IPL Parameters will be stored at absolute address 136 * 204 (0xcc) which means it is 32-bit word aligned but not 137 * double-word aligned. 138 * Placement of data fields in this area must account for 139 * their alignment needs. E.g., netboot_start_address must 140 * have an offset of 4 + n * 8 bytes within the struct in order 141 * to keep it double-word aligned. 142 * The total size of the struct must never exceed 28 bytes. 143 * This definition must be kept in sync with the definition 144 * in pc-bios/s390-ccw/iplb.h. 145 */ 146 struct QemuIplParameters { 147 uint8_t qipl_flags; 148 uint8_t reserved1[3]; 149 uint64_t netboot_start_addr; 150 uint32_t boot_menu_timeout; 151 uint8_t reserved2[12]; 152 } QEMU_PACKED; 153 typedef struct QemuIplParameters QemuIplParameters; 154 155 #define TYPE_S390_IPL "s390-ipl" 156 OBJECT_DECLARE_SIMPLE_TYPE(S390IPLState, S390_IPL) 157 158 struct S390IPLState { 159 /*< private >*/ 160 DeviceState parent_obj; 161 IplParameterBlock iplb; 162 IplParameterBlock iplb_pv; 163 QemuIplParameters qipl; 164 uint64_t start_addr; 165 uint64_t compat_start_addr; 166 uint64_t bios_start_addr; 167 uint64_t compat_bios_start_addr; 168 bool enforce_bios; 169 bool iplb_valid; 170 bool iplb_valid_pv; 171 bool netboot; 172 /* reset related properties don't have to be migrated or reset */ 173 enum s390_reset reset_type; 174 int reset_cpu_index; 175 176 /*< public >*/ 177 char *kernel; 178 char *initrd; 179 char *cmdline; 180 char *firmware; 181 char *netboot_fw; 182 uint8_t cssid; 183 uint8_t ssid; 184 uint16_t devno; 185 bool iplbext_migration; 186 }; 187 QEMU_BUILD_BUG_MSG(offsetof(S390IPLState, iplb) & 3, "alignment of iplb wrong"); 188 189 #define DIAG_308_RC_OK 0x0001 190 #define DIAG_308_RC_NO_CONF 0x0102 191 #define DIAG_308_RC_INVALID 0x0402 192 #define DIAG_308_RC_NO_PV_CONF 0x0902 193 #define DIAG_308_RC_INVAL_FOR_PV 0x0a02 194 195 #define DIAG308_RESET_MOD_CLR 0 196 #define DIAG308_RESET_LOAD_NORM 1 197 #define DIAG308_LOAD_CLEAR 3 198 #define DIAG308_LOAD_NORMAL_DUMP 4 199 #define DIAG308_SET 5 200 #define DIAG308_STORE 6 201 #define DIAG308_PV_SET 8 202 #define DIAG308_PV_STORE 9 203 #define DIAG308_PV_START 10 204 205 #define S390_IPL_TYPE_FCP 0x00 206 #define S390_IPL_TYPE_CCW 0x02 207 #define S390_IPL_TYPE_PV 0x05 208 #define S390_IPL_TYPE_QEMU_SCSI 0xff 209 210 #define S390_IPLB_HEADER_LEN 8 211 #define S390_IPLB_MIN_PV_LEN 148 212 #define S390_IPLB_MIN_CCW_LEN 200 213 #define S390_IPLB_MIN_FCP_LEN 384 214 #define S390_IPLB_MIN_QEMU_SCSI_LEN 200 215 216 static inline bool iplb_valid_len(IplParameterBlock *iplb) 217 { 218 return be32_to_cpu(iplb->len) <= sizeof(IplParameterBlock); 219 } 220 221 static inline bool ipl_valid_pv_components(IplParameterBlock *iplb) 222 { 223 IPLBlockPV *ipib_pv = &iplb->pv; 224 int i; 225 226 if (ipib_pv->num_comp == 0) { 227 return false; 228 } 229 230 for (i = 0; i < ipib_pv->num_comp; i++) { 231 /* Addr must be 4k aligned */ 232 if (ipib_pv->components[i].addr & ~TARGET_PAGE_MASK) { 233 return false; 234 } 235 236 /* Tweak prefix is monotonically increasing with each component */ 237 if (i < ipib_pv->num_comp - 1 && 238 ipib_pv->components[i].tweak_pref >= 239 ipib_pv->components[i + 1].tweak_pref) { 240 return false; 241 } 242 } 243 return true; 244 } 245 246 static inline bool ipl_valid_pv_header(IplParameterBlock *iplb) 247 { 248 IPLBlockPV *ipib_pv = &iplb->pv; 249 250 if (ipib_pv->pv_header_len > 2 * TARGET_PAGE_SIZE) { 251 return false; 252 } 253 254 if (!address_space_access_valid(&address_space_memory, 255 ipib_pv->pv_header_addr, 256 ipib_pv->pv_header_len, 257 false, 258 MEMTXATTRS_UNSPECIFIED)) { 259 return false; 260 } 261 262 return true; 263 } 264 265 static inline bool iplb_valid_pv(IplParameterBlock *iplb) 266 { 267 if (iplb->pbt != S390_IPL_TYPE_PV || 268 be32_to_cpu(iplb->len) < S390_IPLB_MIN_PV_LEN) { 269 return false; 270 } 271 if (!ipl_valid_pv_header(iplb)) { 272 return false; 273 } 274 return ipl_valid_pv_components(iplb); 275 } 276 277 static inline bool iplb_valid(IplParameterBlock *iplb) 278 { 279 switch (iplb->pbt) { 280 case S390_IPL_TYPE_FCP: 281 return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_FCP_LEN; 282 case S390_IPL_TYPE_CCW: 283 return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_CCW_LEN; 284 default: 285 return false; 286 } 287 } 288 289 #endif 290