hw/spapr.c

   1 /*
   2  * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
   3  *
   4  * Copyright (c) 2004-2007 Fabrice Bellard
   5  * Copyright (c) 2007 Jocelyn Mayer
   6  * Copyright (c) 2010 David Gibson, IBM Corporation.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  *
  26  */
  27 #include "sysemu.h"
  28 #include "hw.h"
  29 #include "elf.h"
  30 #include "net.h"
  31 #include "blockdev.h"
  32
  33 #include "hw/boards.h"
  34 #include "hw/ppc.h"
  35 #include "hw/loader.h"
  36
  37 #include "hw/spapr.h"
  38 #include "hw/spapr_vio.h"
  39 #include "hw/xics.h"
  40
  41 #include <libfdt.h>
  42
  43 #define KERNEL_LOAD_ADDR        0x00000000
  44 #define INITRD_LOAD_ADDR        0x02800000
  45 #define FDT_MAX_SIZE            0x10000
  46 #define RTAS_MAX_SIZE           0x10000
  47 #define FW_MAX_SIZE             0x400000
  48 #define FW_FILE_NAME            "slof.bin"
  49
  50 #define MIN_RAM_SLOF            512UL
  51
  52 #define TIMEBASE_FREQ           512000000ULL
  53
  54 #define MAX_CPUS                256
  55 #define XICS_IRQS               1024
  56
  57 sPAPREnvironment *spapr;
  58
  59 static void *spapr_create_fdt_skel(const char *cpu_model,
  60                                    target_phys_addr_t initrd_base,
  61                                    target_phys_addr_t initrd_size,
  62                                    const char *boot_device,
  63                                    const char *kernel_cmdline,
  64                                    long hash_shift)
  65 {
  66     void *fdt;
  67     CPUState *env;
  68     uint64_t mem_reg_property[] = { 0, cpu_to_be64(ram_size) };
  69     uint32_t start_prop = cpu_to_be32(initrd_base);
  70     uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size);
  71     uint32_t pft_size_prop[] = {0, cpu_to_be32(hash_shift)};
  72     char hypertas_prop[] = "hcall-pft\0hcall-term\0hcall-dabr\0hcall-interrupt"
  73         "\0hcall-tce\0hcall-vio\0hcall-splpar";
  74     uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};
  75     int i;
  76     char *modelname;
  77
  78 #define _FDT(exp) \
  79     do { \
  80         int ret = (exp);                                           \
  81         if (ret < 0) {                                             \
  82             fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
  83                     #exp, fdt_strerror(ret));                      \
  84             exit(1);                                               \
  85         }                                                          \
  86     } while (0)
  87
  88     fdt = qemu_mallocz(FDT_MAX_SIZE);
  89     _FDT((fdt_create(fdt, FDT_MAX_SIZE)));
  90
  91     _FDT((fdt_finish_reservemap(fdt)));
  92
  93     /* Root node */
  94     _FDT((fdt_begin_node(fdt, "")));
  95     _FDT((fdt_property_string(fdt, "device_type", "chrp")));
  96     _FDT((fdt_property_string(fdt, "model", "IBM pSeries (emulated by qemu)")));
  97
  98     _FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
  99     _FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
 100
 101     /* /chosen */
 102     _FDT((fdt_begin_node(fdt, "chosen")));
 103
 104     _FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
 105     _FDT((fdt_property(fdt, "linux,initrd-start",
 106                        &start_prop, sizeof(start_prop))));
 107     _FDT((fdt_property(fdt, "linux,initrd-end",
 108                        &end_prop, sizeof(end_prop))));
 109     _FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
 110
 111     _FDT((fdt_end_node(fdt)));
 112
 113     /* memory node */
 114     _FDT((fdt_begin_node(fdt, "memory@0")));
 115
 116     _FDT((fdt_property_string(fdt, "device_type", "memory")));
 117     _FDT((fdt_property(fdt, "reg",
 118                        mem_reg_property, sizeof(mem_reg_property))));
 119
 120     _FDT((fdt_end_node(fdt)));
 121
 122     /* cpus */
 123     _FDT((fdt_begin_node(fdt, "cpus")));
 124
 125     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 126     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 127
 128     modelname = qemu_strdup(cpu_model);
 129
 130     for (i = 0; i < strlen(modelname); i++) {
 131         modelname[i] = toupper(modelname[i]);
 132     }
 133
 134     for (env = first_cpu; env != NULL; env = env->next_cpu) {
 135         int index = env->cpu_index;
 136         uint32_t gserver_prop[] = {cpu_to_be32(index), 0}; /* HACK! */
 137         char *nodename;
 138         uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
 139                            0xffffffff, 0xffffffff};
 140
 141         if (asprintf(&nodename, "%s@%x", modelname, index) < 0) {
 142             fprintf(stderr, "Allocation failure\n");
 143             exit(1);
 144         }
 145
 146         _FDT((fdt_begin_node(fdt, nodename)));
 147
 148         free(nodename);
 149
 150         _FDT((fdt_property_cell(fdt, "reg", index)));
 151         _FDT((fdt_property_string(fdt, "device_type", "cpu")));
 152
 153         _FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
 154         _FDT((fdt_property_cell(fdt, "dcache-block-size",
 155                                 env->dcache_line_size)));
 156         _FDT((fdt_property_cell(fdt, "icache-block-size",
 157                                 env->icache_line_size)));
 158         _FDT((fdt_property_cell(fdt, "timebase-frequency", TIMEBASE_FREQ)));
 159         /* Hardcode CPU frequency for now.  It's kind of arbitrary on
 160          * full emu, for kvm we should copy it from the host */
 161         _FDT((fdt_property_cell(fdt, "clock-frequency", 1000000000)));
 162         _FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
 163         _FDT((fdt_property(fdt, "ibm,pft-size",
 164                            pft_size_prop, sizeof(pft_size_prop))));
 165         _FDT((fdt_property_string(fdt, "status", "okay")));
 166         _FDT((fdt_property(fdt, "64-bit", NULL, 0)));
 167         _FDT((fdt_property_cell(fdt, "ibm,ppc-interrupt-server#s", index)));
 168         _FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
 169                            gserver_prop, sizeof(gserver_prop))));
 170
 171         if (env->mmu_model & POWERPC_MMU_1TSEG) {
 172             _FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
 173                                segs, sizeof(segs))));
 174         }
 175
 176         _FDT((fdt_end_node(fdt)));
 177     }
 178
 179     qemu_free(modelname);
 180
 181     _FDT((fdt_end_node(fdt)));
 182
 183     /* RTAS */
 184     _FDT((fdt_begin_node(fdt, "rtas")));
 185
 186     _FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
 187                        sizeof(hypertas_prop))));
 188
 189     _FDT((fdt_end_node(fdt)));
 190
 191     /* interrupt controller */
 192     _FDT((fdt_begin_node(fdt, "interrupt-controller@0")));
 193
 194     _FDT((fdt_property_string(fdt, "device_type",
 195                               "PowerPC-External-Interrupt-Presentation")));
 196     _FDT((fdt_property_string(fdt, "compatible", "IBM,ppc-xicp")));
 197     _FDT((fdt_property_cell(fdt, "reg", 0)));
 198     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 199     _FDT((fdt_property(fdt, "ibm,interrupt-server-ranges",
 200                        interrupt_server_ranges_prop,
 201                        sizeof(interrupt_server_ranges_prop))));
 202
 203     _FDT((fdt_end_node(fdt)));
 204
 205     /* vdevice */
 206     _FDT((fdt_begin_node(fdt, "vdevice")));
 207
 208     _FDT((fdt_property_string(fdt, "device_type", "vdevice")));
 209     _FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
 210     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 211     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 212     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
 213     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 214
 215     _FDT((fdt_end_node(fdt)));
 216
 217     _FDT((fdt_end_node(fdt))); /* close root node */
 218     _FDT((fdt_finish(fdt)));
 219
 220     return fdt;
 221 }
 222
 223 static void spapr_finalize_fdt(sPAPREnvironment *spapr,
 224                                target_phys_addr_t fdt_addr,
 225                                target_phys_addr_t rtas_addr,
 226                                target_phys_addr_t rtas_size)
 227 {
 228     int ret;
 229     void *fdt;
 230
 231     fdt = qemu_malloc(FDT_MAX_SIZE);
 232
 233     /* open out the base tree into a temp buffer for the final tweaks */
 234     _FDT((fdt_open_into(spapr->fdt_skel, fdt, FDT_MAX_SIZE)));
 235
 236     ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
 237     if (ret < 0) {
 238         fprintf(stderr, "couldn't setup vio devices in fdt\n");
 239         exit(1);
 240     }
 241
 242     /* RTAS */
 243     ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
 244     if (ret < 0) {
 245         fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
 246     }
 247
 248     _FDT((fdt_pack(fdt)));
 249
 250     cpu_physical_memory_write(fdt_addr, fdt, fdt_totalsize(fdt));
 251
 252     qemu_free(fdt);
 253 }
 254
 255 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 256 {
 257     return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
 258 }
 259
 260 static void emulate_spapr_hypercall(CPUState *env)
 261 {
 262     env->gpr[3] = spapr_hypercall(env, env->gpr[3], &env->gpr[4]);
 263 }
 264
 265 static void spapr_reset(void *opaque)
 266 {
 267     sPAPREnvironment *spapr = (sPAPREnvironment *)opaque;
 268
 269     fprintf(stderr, "sPAPR reset\n");
 270
 271     /* flush out the hash table */
 272     memset(spapr->htab, 0, spapr->htab_size);
 273
 274     /* Load the fdt */
 275     spapr_finalize_fdt(spapr, spapr->fdt_addr, spapr->rtas_addr,
 276                        spapr->rtas_size);
 277
 278     /* Set up the entry state */
 279     first_cpu->gpr[3] = spapr->fdt_addr;
 280     first_cpu->gpr[5] = 0;
 281     first_cpu->halted = 0;
 282     first_cpu->nip = spapr->entry_point;
 283
 284 }
 285
 286 /* pSeries LPAR / sPAPR hardware init */
 287 static void ppc_spapr_init(ram_addr_t ram_size,
 288                            const char *boot_device,
 289                            const char *kernel_filename,
 290                            const char *kernel_cmdline,
 291                            const char *initrd_filename,
 292                            const char *cpu_model)
 293 {
 294     CPUState *env;
 295     int i;
 296     ram_addr_t ram_offset;
 297     uint32_t initrd_base;
 298     long kernel_size, initrd_size, fw_size;
 299     long pteg_shift = 17;
 300     char *filename;
 301     int irq = 16;
 302
 303     spapr = qemu_malloc(sizeof(*spapr));
 304     cpu_ppc_hypercall = emulate_spapr_hypercall;
 305
 306     /* We place the device tree just below either the top of RAM, or
 307      * 2GB, so that it can be processed with 32-bit code if
 308      * necessary */
 309     spapr->fdt_addr = MIN(ram_size, 0x80000000) - FDT_MAX_SIZE;
 310     spapr->rtas_addr = spapr->fdt_addr - RTAS_MAX_SIZE;
 311
 312     /* init CPUs */
 313     if (cpu_model == NULL) {
 314         cpu_model = "POWER7";
 315     }
 316     for (i = 0; i < smp_cpus; i++) {
 317         env = cpu_init(cpu_model);
 318
 319         if (!env) {
 320             fprintf(stderr, "Unable to find PowerPC CPU definition\n");
 321             exit(1);
 322         }
 323         /* Set time-base frequency to 512 MHz */
 324         cpu_ppc_tb_init(env, TIMEBASE_FREQ);
 325         qemu_register_reset((QEMUResetHandler *)&cpu_reset, env);
 326
 327         env->hreset_vector = 0x60;
 328         env->hreset_excp_prefix = 0;
 329         env->gpr[3] = env->cpu_index;
 330     }
 331
 332     /* allocate RAM */
 333     ram_offset = qemu_ram_alloc(NULL, "ppc_spapr.ram", ram_size);
 334     cpu_register_physical_memory(0, ram_size, ram_offset);
 335
 336     /* allocate hash page table.  For now we always make this 16mb,
 337      * later we should probably make it scale to the size of guest
 338      * RAM */
 339     spapr->htab_size = 1ULL << (pteg_shift + 7);
 340     spapr->htab = qemu_malloc(spapr->htab_size);
 341
 342     for (env = first_cpu; env != NULL; env = env->next_cpu) {
 343         env->external_htab = spapr->htab;
 344         env->htab_base = -1;
 345         env->htab_mask = spapr->htab_size - 1;
 346     }
 347
 348     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
 349     spapr->rtas_size = load_image_targphys(filename, spapr->rtas_addr,
 350                                            ram_size - spapr->rtas_addr);
 351     if (spapr->rtas_size < 0) {
 352         hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 353         exit(1);
 354     }
 355     qemu_free(filename);
 356
 357     /* Set up Interrupt Controller */
 358     spapr->icp = xics_system_init(XICS_IRQS);
 359
 360     /* Set up VIO bus */
 361     spapr->vio_bus = spapr_vio_bus_init();
 362
 363     for (i = 0; i < MAX_SERIAL_PORTS; i++, irq++) {
 364         if (serial_hds[i]) {
 365             spapr_vty_create(spapr->vio_bus, SPAPR_VTY_BASE_ADDRESS + i,
 366                              serial_hds[i], xics_find_qirq(spapr->icp, irq),
 367                              irq);
 368         }
 369     }
 370
 371     for (i = 0; i < nb_nics; i++, irq++) {
 372         NICInfo *nd = &nd_table[i];
 373
 374         if (!nd->model) {
 375             nd->model = qemu_strdup("ibmveth");
 376         }
 377
 378         if (strcmp(nd->model, "ibmveth") == 0) {
 379             spapr_vlan_create(spapr->vio_bus, 0x1000 + i, nd,
 380                               xics_find_qirq(spapr->icp, irq), irq);
 381         } else {
 382             fprintf(stderr, "pSeries (sPAPR) platform does not support "
 383                     "NIC model '%s' (only ibmveth is supported)\n",
 384                     nd->model);
 385             exit(1);
 386         }
 387     }
 388
 389     for (i = 0; i <= drive_get_max_bus(IF_SCSI); i++) {
 390         spapr_vscsi_create(spapr->vio_bus, 0x2000 + i,
 391                            xics_find_qirq(spapr->icp, irq), irq);
 392         irq++;
 393     }
 394
 395     if (kernel_filename) {
 396         uint64_t lowaddr = 0;
 397
 398         kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
 399                                NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0);
 400         if (kernel_size < 0) {
 401             kernel_size = load_image_targphys(kernel_filename,
 402                                               KERNEL_LOAD_ADDR,
 403                                               ram_size - KERNEL_LOAD_ADDR);
 404         }
 405         if (kernel_size < 0) {
 406             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 407                     kernel_filename);
 408             exit(1);
 409         }
 410
 411         /* load initrd */
 412         if (initrd_filename) {
 413             initrd_base = INITRD_LOAD_ADDR;
 414             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 415                                               ram_size - initrd_base);
 416             if (initrd_size < 0) {
 417                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 418                         initrd_filename);
 419                 exit(1);
 420             }
 421         } else {
 422             initrd_base = 0;
 423             initrd_size = 0;
 424         }
 425
 426         spapr->entry_point = KERNEL_LOAD_ADDR;
 427     } else {
 428         if (ram_size < (MIN_RAM_SLOF << 20)) {
 429             fprintf(stderr, "qemu: pSeries SLOF firmware requires >= "
 430                     "%ldM guest RAM\n", MIN_RAM_SLOF);
 431             exit(1);
 432         }
 433         filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "slof.bin");
 434         fw_size = load_image_targphys(filename, 0, FW_MAX_SIZE);
 435         if (fw_size < 0) {
 436             hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 437             exit(1);
 438         }
 439         qemu_free(filename);
 440         spapr->entry_point = 0x100;
 441         initrd_base = 0;
 442         initrd_size = 0;
 443
 444         /* SLOF will startup the secondary CPUs using RTAS,
 445            rather than expecting a kexec() style entry */
 446         for (env = first_cpu; env != NULL; env = env->next_cpu) {
 447             env->halted = 1;
 448         }
 449     }
 450
 451     /* Prepare the device tree */
 452     spapr->fdt_skel = spapr_create_fdt_skel(cpu_model,
 453                                             initrd_base, initrd_size,
 454                                             boot_device, kernel_cmdline,
 455                                             pteg_shift + 7);
 456     assert(spapr->fdt_skel != NULL);
 457
 458     qemu_register_reset(spapr_reset, spapr);
 459 }
 460
 461 static QEMUMachine spapr_machine = {
 462     .name = "pseries",
 463     .desc = "pSeries Logical Partition (PAPR compliant)",
 464     .init = ppc_spapr_init,
 465     .max_cpus = MAX_CPUS,
 466     .no_vga = 1,
 467     .no_parallel = 1,
 468     .use_scsi = 1,
 469 };
 470
 471 static void spapr_machine_init(void)
 472 {
 473     qemu_register_machine(&spapr_machine);
 474 }
 475
 476 machine_init(spapr_machine_init);