hw/ppc/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/sysemu.h"
  28 #include "hw/hw.h"
  29 #include "elf.h"
  30 #include "net/net.h"
  31 #include "sysemu/blockdev.h"
  32 #include "sysemu/cpus.h"
  33 #include "sysemu/kvm.h"
  34 #include "kvm_ppc.h"
  35
  36 #include "hw/boards.h"
  37 #include "hw/ppc.h"
  38 #include "hw/loader.h"
  39
  40 #include "hw/spapr.h"
  41 #include "hw/spapr_vio.h"
  42 #include "hw/spapr_pci.h"
  43 #include "hw/xics.h"
  44 #include "hw/pci/msi.h"
  45
  46 #include "sysemu/kvm.h"
  47 #include "kvm_ppc.h"
  48 #include "hw/pci/pci.h"
  49
  50 #include "exec/address-spaces.h"
  51 #include "hw/usb.h"
  52 #include "qemu/config-file.h"
  53
  54 #include <libfdt.h>
  55
  56 /* SLOF memory layout:
  57  *
  58  * SLOF raw image loaded at 0, copies its romfs right below the flat
  59  * device-tree, then position SLOF itself 31M below that
  60  *
  61  * So we set FW_OVERHEAD to 40MB which should account for all of that
  62  * and more
  63  *
  64  * We load our kernel at 4M, leaving space for SLOF initial image
  65  */
  66 #define FDT_MAX_SIZE            0x10000
  67 #define RTAS_MAX_SIZE           0x10000
  68 #define FW_MAX_SIZE             0x400000
  69 #define FW_FILE_NAME            "slof.bin"
  70 #define FW_OVERHEAD             0x2800000
  71 #define KERNEL_LOAD_ADDR        FW_MAX_SIZE
  72
  73 #define MIN_RMA_SLOF            128UL
  74
  75 #define TIMEBASE_FREQ           512000000ULL
  76
  77 #define MAX_CPUS                256
  78 #define XICS_IRQS               1024
  79
  80 #define PHANDLE_XICP            0x00001111
  81
  82 #define HTAB_SIZE(spapr)        (1ULL << ((spapr)->htab_shift))
  83
  84 sPAPREnvironment *spapr;
  85
  86 int spapr_allocate_irq(int hint, bool lsi)
  87 {
  88     int irq;
  89
  90     if (hint) {
  91         irq = hint;
  92         /* FIXME: we should probably check for collisions somehow */
  93     } else {
  94         irq = spapr->next_irq++;
  95     }
  96
  97     /* Configure irq type */
  98     if (!xics_get_qirq(spapr->icp, irq)) {
  99         return 0;
 100     }
 101
 102     xics_set_irq_type(spapr->icp, irq, lsi);
 103
 104     return irq;
 105 }
 106
 107 /* Allocate block of consequtive IRQs, returns a number of the first */
 108 int spapr_allocate_irq_block(int num, bool lsi)
 109 {
 110     int first = -1;
 111     int i;
 112
 113     for (i = 0; i < num; ++i) {
 114         int irq;
 115
 116         irq = spapr_allocate_irq(0, lsi);
 117         if (!irq) {
 118             return -1;
 119         }
 120
 121         if (0 == i) {
 122             first = irq;
 123         }
 124
 125         /* If the above doesn't create a consecutive block then that's
 126          * an internal bug */
 127         assert(irq == (first + i));
 128     }
 129
 130     return first;
 131 }
 132
 133 static int spapr_fixup_cpu_dt(void *fdt, sPAPREnvironment *spapr)
 134 {
 135     int ret = 0, offset;
 136     CPUPPCState *env;
 137     CPUState *cpu;
 138     char cpu_model[32];
 139     int smt = kvmppc_smt_threads();
 140     uint32_t pft_size_prop[] = {0, cpu_to_be32(spapr->htab_shift)};
 141
 142     assert(spapr->cpu_model);
 143
 144     for (env = first_cpu; env != NULL; env = env->next_cpu) {
 145         cpu = CPU(ppc_env_get_cpu(env));
 146         uint32_t associativity[] = {cpu_to_be32(0x5),
 147                                     cpu_to_be32(0x0),
 148                                     cpu_to_be32(0x0),
 149                                     cpu_to_be32(0x0),
 150                                     cpu_to_be32(cpu->numa_node),
 151                                     cpu_to_be32(cpu->cpu_index)};
 152
 153         if ((cpu->cpu_index % smt) != 0) {
 154             continue;
 155         }
 156
 157         snprintf(cpu_model, 32, "/cpus/%s@%x", spapr->cpu_model,
 158                  cpu->cpu_index);
 159
 160         offset = fdt_path_offset(fdt, cpu_model);
 161         if (offset < 0) {
 162             return offset;
 163         }
 164
 165         if (nb_numa_nodes > 1) {
 166             ret = fdt_setprop(fdt, offset, "ibm,associativity", associativity,
 167                               sizeof(associativity));
 168             if (ret < 0) {
 169                 return ret;
 170             }
 171         }
 172
 173         ret = fdt_setprop(fdt, offset, "ibm,pft-size",
 174                           pft_size_prop, sizeof(pft_size_prop));
 175         if (ret < 0) {
 176             return ret;
 177         }
 178     }
 179     return ret;
 180 }
 181
 182
 183 static size_t create_page_sizes_prop(CPUPPCState *env, uint32_t *prop,
 184                                      size_t maxsize)
 185 {
 186     size_t maxcells = maxsize / sizeof(uint32_t);
 187     int i, j, count;
 188     uint32_t *p = prop;
 189
 190     for (i = 0; i < PPC_PAGE_SIZES_MAX_SZ; i++) {
 191         struct ppc_one_seg_page_size *sps = &env->sps.sps[i];
 192
 193         if (!sps->page_shift) {
 194             break;
 195         }
 196         for (count = 0; count < PPC_PAGE_SIZES_MAX_SZ; count++) {
 197             if (sps->enc[count].page_shift == 0) {
 198                 break;
 199             }
 200         }
 201         if ((p - prop) >= (maxcells - 3 - count * 2)) {
 202             break;
 203         }
 204         *(p++) = cpu_to_be32(sps->page_shift);
 205         *(p++) = cpu_to_be32(sps->slb_enc);
 206         *(p++) = cpu_to_be32(count);
 207         for (j = 0; j < count; j++) {
 208             *(p++) = cpu_to_be32(sps->enc[j].page_shift);
 209             *(p++) = cpu_to_be32(sps->enc[j].pte_enc);
 210         }
 211     }
 212
 213     return (p - prop) * sizeof(uint32_t);
 214 }
 215
 216 #define _FDT(exp) \
 217     do { \
 218         int ret = (exp);                                           \
 219         if (ret < 0) {                                             \
 220             fprintf(stderr, "qemu: error creating device tree: %s: %s\n", \
 221                     #exp, fdt_strerror(ret));                      \
 222             exit(1);                                               \
 223         }                                                          \
 224     } while (0)
 225
 226
 227 static void *spapr_create_fdt_skel(const char *cpu_model,
 228                                    hwaddr initrd_base,
 229                                    hwaddr initrd_size,
 230                                    hwaddr kernel_size,
 231                                    const char *boot_device,
 232                                    const char *kernel_cmdline,
 233                                    uint32_t epow_irq)
 234 {
 235     void *fdt;
 236     CPUPPCState *env;
 237     uint32_t start_prop = cpu_to_be32(initrd_base);
 238     uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size);
 239     char hypertas_prop[] = "hcall-pft\0hcall-term\0hcall-dabr\0hcall-interrupt"
 240         "\0hcall-tce\0hcall-vio\0hcall-splpar\0hcall-bulk";
 241     char qemu_hypertas_prop[] = "hcall-memop1";
 242     uint32_t refpoints[] = {cpu_to_be32(0x4), cpu_to_be32(0x4)};
 243     uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};
 244     char *modelname;
 245     int i, smt = kvmppc_smt_threads();
 246     unsigned char vec5[] = {0x0, 0x0, 0x0, 0x0, 0x0, 0x80};
 247
 248     fdt = g_malloc0(FDT_MAX_SIZE);
 249     _FDT((fdt_create(fdt, FDT_MAX_SIZE)));
 250
 251     if (kernel_size) {
 252         _FDT((fdt_add_reservemap_entry(fdt, KERNEL_LOAD_ADDR, kernel_size)));
 253     }
 254     if (initrd_size) {
 255         _FDT((fdt_add_reservemap_entry(fdt, initrd_base, initrd_size)));
 256     }
 257     _FDT((fdt_finish_reservemap(fdt)));
 258
 259     /* Root node */
 260     _FDT((fdt_begin_node(fdt, "")));
 261     _FDT((fdt_property_string(fdt, "device_type", "chrp")));
 262     _FDT((fdt_property_string(fdt, "model", "IBM pSeries (emulated by qemu)")));
 263     _FDT((fdt_property_string(fdt, "compatible", "qemu,pseries")));
 264
 265     _FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
 266     _FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
 267
 268     /* /chosen */
 269     _FDT((fdt_begin_node(fdt, "chosen")));
 270
 271     /* Set Form1_affinity */
 272     _FDT((fdt_property(fdt, "ibm,architecture-vec-5", vec5, sizeof(vec5))));
 273
 274     _FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
 275     _FDT((fdt_property(fdt, "linux,initrd-start",
 276                        &start_prop, sizeof(start_prop))));
 277     _FDT((fdt_property(fdt, "linux,initrd-end",
 278                        &end_prop, sizeof(end_prop))));
 279     if (kernel_size) {
 280         uint64_t kprop[2] = { cpu_to_be64(KERNEL_LOAD_ADDR),
 281                               cpu_to_be64(kernel_size) };
 282
 283         _FDT((fdt_property(fdt, "qemu,boot-kernel", &kprop, sizeof(kprop))));
 284     }
 285     if (boot_device) {
 286         _FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
 287     }
 288     _FDT((fdt_property_cell(fdt, "qemu,graphic-width", graphic_width)));
 289     _FDT((fdt_property_cell(fdt, "qemu,graphic-height", graphic_height)));
 290     _FDT((fdt_property_cell(fdt, "qemu,graphic-depth", graphic_depth)));
 291
 292     _FDT((fdt_end_node(fdt)));
 293
 294     /* cpus */
 295     _FDT((fdt_begin_node(fdt, "cpus")));
 296
 297     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 298     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 299
 300     modelname = g_strdup(cpu_model);
 301
 302     for (i = 0; i < strlen(modelname); i++) {
 303         modelname[i] = toupper(modelname[i]);
 304     }
 305
 306     /* This is needed during FDT finalization */
 307     spapr->cpu_model = g_strdup(modelname);
 308
 309     for (env = first_cpu; env != NULL; env = env->next_cpu) {
 310         CPUState *cpu = CPU(ppc_env_get_cpu(env));
 311         int index = cpu->cpu_index;
 312         uint32_t servers_prop[smp_threads];
 313         uint32_t gservers_prop[smp_threads * 2];
 314         char *nodename;
 315         uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
 316                            0xffffffff, 0xffffffff};
 317         uint32_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq() : TIMEBASE_FREQ;
 318         uint32_t cpufreq = kvm_enabled() ? kvmppc_get_clockfreq() : 1000000000;
 319         uint32_t page_sizes_prop[64];
 320         size_t page_sizes_prop_size;
 321
 322         if ((index % smt) != 0) {
 323             continue;
 324         }
 325
 326         nodename = g_strdup_printf("%s@%x", modelname, index);
 327
 328         _FDT((fdt_begin_node(fdt, nodename)));
 329
 330         g_free(nodename);
 331
 332         _FDT((fdt_property_cell(fdt, "reg", index)));
 333         _FDT((fdt_property_string(fdt, "device_type", "cpu")));
 334
 335         _FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
 336         _FDT((fdt_property_cell(fdt, "dcache-block-size",
 337                                 env->dcache_line_size)));
 338         _FDT((fdt_property_cell(fdt, "icache-block-size",
 339                                 env->icache_line_size)));
 340         _FDT((fdt_property_cell(fdt, "timebase-frequency", tbfreq)));
 341         _FDT((fdt_property_cell(fdt, "clock-frequency", cpufreq)));
 342         _FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
 343         _FDT((fdt_property_string(fdt, "status", "okay")));
 344         _FDT((fdt_property(fdt, "64-bit", NULL, 0)));
 345
 346         /* Build interrupt servers and gservers properties */
 347         for (i = 0; i < smp_threads; i++) {
 348             servers_prop[i] = cpu_to_be32(index + i);
 349             /* Hack, direct the group queues back to cpu 0 */
 350             gservers_prop[i*2] = cpu_to_be32(index + i);
 351             gservers_prop[i*2 + 1] = 0;
 352         }
 353         _FDT((fdt_property(fdt, "ibm,ppc-interrupt-server#s",
 354                            servers_prop, sizeof(servers_prop))));
 355         _FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
 356                            gservers_prop, sizeof(gservers_prop))));
 357
 358         if (env->mmu_model & POWERPC_MMU_1TSEG) {
 359             _FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
 360                                segs, sizeof(segs))));
 361         }
 362
 363         /* Advertise VMX/VSX (vector extensions) if available
 364          *   0 / no property == no vector extensions
 365          *   1               == VMX / Altivec available
 366          *   2               == VSX available */
 367         if (env->insns_flags & PPC_ALTIVEC) {
 368             uint32_t vmx = (env->insns_flags2 & PPC2_VSX) ? 2 : 1;
 369
 370             _FDT((fdt_property_cell(fdt, "ibm,vmx", vmx)));
 371         }
 372
 373         /* Advertise DFP (Decimal Floating Point) if available
 374          *   0 / no property == no DFP
 375          *   1               == DFP available */
 376         if (env->insns_flags2 & PPC2_DFP) {
 377             _FDT((fdt_property_cell(fdt, "ibm,dfp", 1)));
 378         }
 379
 380         page_sizes_prop_size = create_page_sizes_prop(env, page_sizes_prop,
 381                                                       sizeof(page_sizes_prop));
 382         if (page_sizes_prop_size) {
 383             _FDT((fdt_property(fdt, "ibm,segment-page-sizes",
 384                                page_sizes_prop, page_sizes_prop_size)));
 385         }
 386
 387         _FDT((fdt_end_node(fdt)));
 388     }
 389
 390     g_free(modelname);
 391
 392     _FDT((fdt_end_node(fdt)));
 393
 394     /* RTAS */
 395     _FDT((fdt_begin_node(fdt, "rtas")));
 396
 397     _FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
 398                        sizeof(hypertas_prop))));
 399     _FDT((fdt_property(fdt, "qemu,hypertas-functions", qemu_hypertas_prop,
 400                        sizeof(qemu_hypertas_prop))));
 401
 402     _FDT((fdt_property(fdt, "ibm,associativity-reference-points",
 403         refpoints, sizeof(refpoints))));
 404
 405     _FDT((fdt_property_cell(fdt, "rtas-error-log-max", RTAS_ERROR_LOG_MAX)));
 406
 407     _FDT((fdt_end_node(fdt)));
 408
 409     /* interrupt controller */
 410     _FDT((fdt_begin_node(fdt, "interrupt-controller")));
 411
 412     _FDT((fdt_property_string(fdt, "device_type",
 413                               "PowerPC-External-Interrupt-Presentation")));
 414     _FDT((fdt_property_string(fdt, "compatible", "IBM,ppc-xicp")));
 415     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 416     _FDT((fdt_property(fdt, "ibm,interrupt-server-ranges",
 417                        interrupt_server_ranges_prop,
 418                        sizeof(interrupt_server_ranges_prop))));
 419     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 2)));
 420     _FDT((fdt_property_cell(fdt, "linux,phandle", PHANDLE_XICP)));
 421     _FDT((fdt_property_cell(fdt, "phandle", PHANDLE_XICP)));
 422
 423     _FDT((fdt_end_node(fdt)));
 424
 425     /* vdevice */
 426     _FDT((fdt_begin_node(fdt, "vdevice")));
 427
 428     _FDT((fdt_property_string(fdt, "device_type", "vdevice")));
 429     _FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
 430     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 431     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 432     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
 433     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 434
 435     _FDT((fdt_end_node(fdt)));
 436
 437     /* event-sources */
 438     spapr_events_fdt_skel(fdt, epow_irq);
 439
 440     _FDT((fdt_end_node(fdt))); /* close root node */
 441     _FDT((fdt_finish(fdt)));
 442
 443     return fdt;
 444 }
 445
 446 static int spapr_populate_memory(sPAPREnvironment *spapr, void *fdt)
 447 {
 448     uint32_t associativity[] = {cpu_to_be32(0x4), cpu_to_be32(0x0),
 449                                 cpu_to_be32(0x0), cpu_to_be32(0x0),
 450                                 cpu_to_be32(0x0)};
 451     char mem_name[32];
 452     hwaddr node0_size, mem_start;
 453     uint64_t mem_reg_property[2];
 454     int i, off;
 455
 456     /* memory node(s) */
 457     node0_size = (nb_numa_nodes > 1) ? node_mem[0] : ram_size;
 458     if (spapr->rma_size > node0_size) {
 459         spapr->rma_size = node0_size;
 460     }
 461
 462     /* RMA */
 463     mem_reg_property[0] = 0;
 464     mem_reg_property[1] = cpu_to_be64(spapr->rma_size);
 465     off = fdt_add_subnode(fdt, 0, "memory@0");
 466     _FDT(off);
 467     _FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
 468     _FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
 469                       sizeof(mem_reg_property))));
 470     _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
 471                       sizeof(associativity))));
 472
 473     /* RAM: Node 0 */
 474     if (node0_size > spapr->rma_size) {
 475         mem_reg_property[0] = cpu_to_be64(spapr->rma_size);
 476         mem_reg_property[1] = cpu_to_be64(node0_size - spapr->rma_size);
 477
 478         sprintf(mem_name, "memory@" TARGET_FMT_lx, spapr->rma_size);
 479         off = fdt_add_subnode(fdt, 0, mem_name);
 480         _FDT(off);
 481         _FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
 482         _FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
 483                           sizeof(mem_reg_property))));
 484         _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
 485                           sizeof(associativity))));
 486     }
 487
 488     /* RAM: Node 1 and beyond */
 489     mem_start = node0_size;
 490     for (i = 1; i < nb_numa_nodes; i++) {
 491         mem_reg_property[0] = cpu_to_be64(mem_start);
 492         mem_reg_property[1] = cpu_to_be64(node_mem[i]);
 493         associativity[3] = associativity[4] = cpu_to_be32(i);
 494         sprintf(mem_name, "memory@" TARGET_FMT_lx, mem_start);
 495         off = fdt_add_subnode(fdt, 0, mem_name);
 496         _FDT(off);
 497         _FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
 498         _FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
 499                           sizeof(mem_reg_property))));
 500         _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
 501                           sizeof(associativity))));
 502         mem_start += node_mem[i];
 503     }
 504
 505     return 0;
 506 }
 507
 508 static void spapr_finalize_fdt(sPAPREnvironment *spapr,
 509                                hwaddr fdt_addr,
 510                                hwaddr rtas_addr,
 511                                hwaddr rtas_size)
 512 {
 513     int ret;
 514     void *fdt;
 515     sPAPRPHBState *phb;
 516
 517     fdt = g_malloc(FDT_MAX_SIZE);
 518
 519     /* open out the base tree into a temp buffer for the final tweaks */
 520     _FDT((fdt_open_into(spapr->fdt_skel, fdt, FDT_MAX_SIZE)));
 521
 522     ret = spapr_populate_memory(spapr, fdt);
 523     if (ret < 0) {
 524         fprintf(stderr, "couldn't setup memory nodes in fdt\n");
 525         exit(1);
 526     }
 527
 528     ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
 529     if (ret < 0) {
 530         fprintf(stderr, "couldn't setup vio devices in fdt\n");
 531         exit(1);
 532     }
 533
 534     QLIST_FOREACH(phb, &spapr->phbs, list) {
 535         ret = spapr_populate_pci_dt(phb, PHANDLE_XICP, fdt);
 536     }
 537
 538     if (ret < 0) {
 539         fprintf(stderr, "couldn't setup PCI devices in fdt\n");
 540         exit(1);
 541     }
 542
 543     /* RTAS */
 544     ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
 545     if (ret < 0) {
 546         fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
 547     }
 548
 549     /* Advertise NUMA via ibm,associativity */
 550     ret = spapr_fixup_cpu_dt(fdt, spapr);
 551     if (ret < 0) {
 552         fprintf(stderr, "Couldn't finalize CPU device tree properties\n");
 553     }
 554
 555     if (!spapr->has_graphics) {
 556         spapr_populate_chosen_stdout(fdt, spapr->vio_bus);
 557     }
 558
 559     _FDT((fdt_pack(fdt)));
 560
 561     if (fdt_totalsize(fdt) > FDT_MAX_SIZE) {
 562         hw_error("FDT too big ! 0x%x bytes (max is 0x%x)\n",
 563                  fdt_totalsize(fdt), FDT_MAX_SIZE);
 564         exit(1);
 565     }
 566
 567     cpu_physical_memory_write(fdt_addr, fdt, fdt_totalsize(fdt));
 568
 569     g_free(fdt);
 570 }
 571
 572 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 573 {
 574     return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
 575 }
 576
 577 static void emulate_spapr_hypercall(PowerPCCPU *cpu)
 578 {
 579     CPUPPCState *env = &cpu->env;
 580
 581     if (msr_pr) {
 582         hcall_dprintf("Hypercall made with MSR[PR]=1\n");
 583         env->gpr[3] = H_PRIVILEGE;
 584     } else {
 585         env->gpr[3] = spapr_hypercall(cpu, env->gpr[3], &env->gpr[4]);
 586     }
 587 }
 588
 589 static void spapr_reset_htab(sPAPREnvironment *spapr)
 590 {
 591     long shift;
 592
 593     /* allocate hash page table.  For now we always make this 16mb,
 594      * later we should probably make it scale to the size of guest
 595      * RAM */
 596
 597     shift = kvmppc_reset_htab(spapr->htab_shift);
 598
 599     if (shift > 0) {
 600         /* Kernel handles htab, we don't need to allocate one */
 601         spapr->htab_shift = shift;
 602     } else {
 603         if (!spapr->htab) {
 604             /* Allocate an htab if we don't yet have one */
 605             spapr->htab = qemu_memalign(HTAB_SIZE(spapr), HTAB_SIZE(spapr));
 606         }
 607
 608         /* And clear it */
 609         memset(spapr->htab, 0, HTAB_SIZE(spapr));
 610     }
 611
 612     /* Update the RMA size if necessary */
 613     if (spapr->vrma_adjust) {
 614         spapr->rma_size = kvmppc_rma_size(ram_size, spapr->htab_shift);
 615     }
 616 }
 617
 618 static void ppc_spapr_reset(void)
 619 {
 620     /* Reset the hash table & recalc the RMA */
 621     spapr_reset_htab(spapr);
 622
 623     qemu_devices_reset();
 624
 625     /* Load the fdt */
 626     spapr_finalize_fdt(spapr, spapr->fdt_addr, spapr->rtas_addr,
 627                        spapr->rtas_size);
 628
 629     /* Set up the entry state */
 630     first_cpu->gpr[3] = spapr->fdt_addr;
 631     first_cpu->gpr[5] = 0;
 632     first_cpu->halted = 0;
 633     first_cpu->nip = spapr->entry_point;
 634
 635 }
 636
 637 static void spapr_cpu_reset(void *opaque)
 638 {
 639     PowerPCCPU *cpu = opaque;
 640     CPUPPCState *env = &cpu->env;
 641
 642     cpu_reset(CPU(cpu));
 643
 644     /* All CPUs start halted.  CPU0 is unhalted from the machine level
 645      * reset code and the rest are explicitly started up by the guest
 646      * using an RTAS call */
 647     env->halted = 1;
 648
 649     env->spr[SPR_HIOR] = 0;
 650
 651     env->external_htab = spapr->htab;
 652     env->htab_base = -1;
 653     env->htab_mask = HTAB_SIZE(spapr) - 1;
 654     env->spr[SPR_SDR1] = (unsigned long)spapr->htab |
 655         (spapr->htab_shift - 18);
 656 }
 657
 658 static void spapr_create_nvram(sPAPREnvironment *spapr)
 659 {
 660     QemuOpts *machine_opts;
 661     DeviceState *dev;
 662
 663     dev = qdev_create(&spapr->vio_bus->bus, "spapr-nvram");
 664
 665     machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
 666     if (machine_opts) {
 667         const char *drivename;
 668
 669         drivename = qemu_opt_get(machine_opts, "nvram");
 670         if (drivename) {
 671             BlockDriverState *bs;
 672
 673             bs = bdrv_find(drivename);
 674             if (!bs) {
 675                 fprintf(stderr, "No such block device \"%s\" for nvram\n",
 676                         drivename);
 677                 exit(1);
 678             }
 679             qdev_prop_set_drive_nofail(dev, "drive", bs);
 680         }
 681     }
 682
 683     qdev_init_nofail(dev);
 684
 685     spapr->nvram = (struct sPAPRNVRAM *)dev;
 686 }
 687
 688 /* Returns whether we want to use VGA or not */
 689 static int spapr_vga_init(PCIBus *pci_bus)
 690 {
 691     switch (vga_interface_type) {
 692     case VGA_NONE:
 693     case VGA_STD:
 694         return pci_vga_init(pci_bus) != NULL;
 695     default:
 696         fprintf(stderr, "This vga model is not supported,"
 697                 "currently it only supports -vga std\n");
 698         exit(0);
 699         break;
 700     }
 701 }
 702
 703 /* pSeries LPAR / sPAPR hardware init */
 704 static void ppc_spapr_init(QEMUMachineInitArgs *args)
 705 {
 706     ram_addr_t ram_size = args->ram_size;
 707     const char *cpu_model = args->cpu_model;
 708     const char *kernel_filename = args->kernel_filename;
 709     const char *kernel_cmdline = args->kernel_cmdline;
 710     const char *initrd_filename = args->initrd_filename;
 711     const char *boot_device = args->boot_device;
 712     PowerPCCPU *cpu;
 713     CPUPPCState *env;
 714     PCIHostState *phb;
 715     int i;
 716     MemoryRegion *sysmem = get_system_memory();
 717     MemoryRegion *ram = g_new(MemoryRegion, 1);
 718     hwaddr rma_alloc_size;
 719     uint32_t initrd_base = 0;
 720     long kernel_size = 0, initrd_size = 0;
 721     long load_limit, rtas_limit, fw_size;
 722     char *filename;
 723
 724     msi_supported = true;
 725
 726     spapr = g_malloc0(sizeof(*spapr));
 727     QLIST_INIT(&spapr->phbs);
 728
 729     cpu_ppc_hypercall = emulate_spapr_hypercall;
 730
 731     /* Allocate RMA if necessary */
 732     rma_alloc_size = kvmppc_alloc_rma("ppc_spapr.rma", sysmem);
 733
 734     if (rma_alloc_size == -1) {
 735         hw_error("qemu: Unable to create RMA\n");
 736         exit(1);
 737     }
 738
 739     if (rma_alloc_size && (rma_alloc_size < ram_size)) {
 740         spapr->rma_size = rma_alloc_size;
 741     } else {
 742         spapr->rma_size = ram_size;
 743
 744         /* With KVM, we don't actually know whether KVM supports an
 745          * unbounded RMA (PR KVM) or is limited by the hash table size
 746          * (HV KVM using VRMA), so we always assume the latter
 747          *
 748          * In that case, we also limit the initial allocations for RTAS
 749          * etc... to 256M since we have no way to know what the VRMA size
 750          * is going to be as it depends on the size of the hash table
 751          * isn't determined yet.
 752          */
 753         if (kvm_enabled()) {
 754             spapr->vrma_adjust = 1;
 755             spapr->rma_size = MIN(spapr->rma_size, 0x10000000);
 756         }
 757     }
 758
 759     /* We place the device tree and RTAS just below either the top of the RMA,
 760      * or just below 2GB, whichever is lowere, so that it can be
 761      * processed with 32-bit real mode code if necessary */
 762     rtas_limit = MIN(spapr->rma_size, 0x80000000);
 763     spapr->rtas_addr = rtas_limit - RTAS_MAX_SIZE;
 764     spapr->fdt_addr = spapr->rtas_addr - FDT_MAX_SIZE;
 765     load_limit = spapr->fdt_addr - FW_OVERHEAD;
 766
 767     /* We aim for a hash table of size 1/128 the size of RAM.  The
 768      * normal rule of thumb is 1/64 the size of RAM, but that's much
 769      * more than needed for the Linux guests we support. */
 770     spapr->htab_shift = 18; /* Minimum architected size */
 771     while (spapr->htab_shift <= 46) {
 772         if ((1ULL << (spapr->htab_shift + 7)) >= ram_size) {
 773             break;
 774         }
 775         spapr->htab_shift++;
 776     }
 777
 778     /* init CPUs */
 779     if (cpu_model == NULL) {
 780         cpu_model = kvm_enabled() ? "host" : "POWER7";
 781     }
 782     for (i = 0; i < smp_cpus; i++) {
 783         cpu = cpu_ppc_init(cpu_model);
 784         if (cpu == NULL) {
 785             fprintf(stderr, "Unable to find PowerPC CPU definition\n");
 786             exit(1);
 787         }
 788         env = &cpu->env;
 789
 790         /* Set time-base frequency to 512 MHz */
 791         cpu_ppc_tb_init(env, TIMEBASE_FREQ);
 792
 793         /* PAPR always has exception vectors in RAM not ROM */
 794         env->hreset_excp_prefix = 0;
 795
 796         /* Tell KVM that we're in PAPR mode */
 797         if (kvm_enabled()) {
 798             kvmppc_set_papr(cpu);
 799         }
 800
 801         qemu_register_reset(spapr_cpu_reset, cpu);
 802     }
 803
 804     /* allocate RAM */
 805     spapr->ram_limit = ram_size;
 806     if (spapr->ram_limit > rma_alloc_size) {
 807         ram_addr_t nonrma_base = rma_alloc_size;
 808         ram_addr_t nonrma_size = spapr->ram_limit - rma_alloc_size;
 809
 810         memory_region_init_ram(ram, "ppc_spapr.ram", nonrma_size);
 811         vmstate_register_ram_global(ram);
 812         memory_region_add_subregion(sysmem, nonrma_base, ram);
 813     }
 814
 815     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
 816     spapr->rtas_size = load_image_targphys(filename, spapr->rtas_addr,
 817                                            rtas_limit - spapr->rtas_addr);
 818     if (spapr->rtas_size < 0) {
 819         hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 820         exit(1);
 821     }
 822     if (spapr->rtas_size > RTAS_MAX_SIZE) {
 823         hw_error("RTAS too big ! 0x%lx bytes (max is 0x%x)\n",
 824                  spapr->rtas_size, RTAS_MAX_SIZE);
 825         exit(1);
 826     }
 827     g_free(filename);
 828
 829
 830     /* Set up Interrupt Controller */
 831     spapr->icp = xics_system_init(XICS_IRQS);
 832     spapr->next_irq = XICS_IRQ_BASE;
 833
 834     /* Set up EPOW events infrastructure */
 835     spapr_events_init(spapr);
 836
 837     /* Set up IOMMU */
 838     spapr_iommu_init();
 839
 840     /* Set up VIO bus */
 841     spapr->vio_bus = spapr_vio_bus_init();
 842
 843     for (i = 0; i < MAX_SERIAL_PORTS; i++) {
 844         if (serial_hds[i]) {
 845             spapr_vty_create(spapr->vio_bus, serial_hds[i]);
 846         }
 847     }
 848
 849     /* We always have at least the nvram device on VIO */
 850     spapr_create_nvram(spapr);
 851
 852     /* Set up PCI */
 853     spapr_pci_rtas_init();
 854
 855     phb = spapr_create_phb(spapr, 0, "pci");
 856
 857     for (i = 0; i < nb_nics; i++) {
 858         NICInfo *nd = &nd_table[i];
 859
 860         if (!nd->model) {
 861             nd->model = g_strdup("ibmveth");
 862         }
 863
 864         if (strcmp(nd->model, "ibmveth") == 0) {
 865             spapr_vlan_create(spapr->vio_bus, nd);
 866         } else {
 867             pci_nic_init_nofail(&nd_table[i], nd->model, NULL);
 868         }
 869     }
 870
 871     for (i = 0; i <= drive_get_max_bus(IF_SCSI); i++) {
 872         spapr_vscsi_create(spapr->vio_bus);
 873     }
 874
 875     /* Graphics */
 876     if (spapr_vga_init(phb->bus)) {
 877         spapr->has_graphics = true;
 878     }
 879
 880     if (usb_enabled(spapr->has_graphics)) {
 881         pci_create_simple(phb->bus, -1, "pci-ohci");
 882         if (spapr->has_graphics) {
 883             usbdevice_create("keyboard");
 884             usbdevice_create("mouse");
 885         }
 886     }
 887
 888     if (spapr->rma_size < (MIN_RMA_SLOF << 20)) {
 889         fprintf(stderr, "qemu: pSeries SLOF firmware requires >= "
 890                 "%ldM guest RMA (Real Mode Area memory)\n", MIN_RMA_SLOF);
 891         exit(1);
 892     }
 893
 894     if (kernel_filename) {
 895         uint64_t lowaddr = 0;
 896
 897         kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
 898                                NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0);
 899         if (kernel_size < 0) {
 900             kernel_size = load_image_targphys(kernel_filename,
 901                                               KERNEL_LOAD_ADDR,
 902                                               load_limit - KERNEL_LOAD_ADDR);
 903         }
 904         if (kernel_size < 0) {
 905             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 906                     kernel_filename);
 907             exit(1);
 908         }
 909
 910         /* load initrd */
 911         if (initrd_filename) {
 912             /* Try to locate the initrd in the gap between the kernel
 913              * and the firmware. Add a bit of space just in case
 914              */
 915             initrd_base = (KERNEL_LOAD_ADDR + kernel_size + 0x1ffff) & ~0xffff;
 916             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 917                                               load_limit - initrd_base);
 918             if (initrd_size < 0) {
 919                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 920                         initrd_filename);
 921                 exit(1);
 922             }
 923         } else {
 924             initrd_base = 0;
 925             initrd_size = 0;
 926         }
 927     }
 928
 929     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, FW_FILE_NAME);
 930     fw_size = load_image_targphys(filename, 0, FW_MAX_SIZE);
 931     if (fw_size < 0) {
 932         hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 933         exit(1);
 934     }
 935     g_free(filename);
 936
 937     spapr->entry_point = 0x100;
 938
 939     /* Prepare the device tree */
 940     spapr->fdt_skel = spapr_create_fdt_skel(cpu_model,
 941                                             initrd_base, initrd_size,
 942                                             kernel_size,
 943                                             boot_device, kernel_cmdline,
 944                                             spapr->epow_irq);
 945     assert(spapr->fdt_skel != NULL);
 946 }
 947
 948 static QEMUMachine spapr_machine = {
 949     .name = "pseries",
 950     .desc = "pSeries Logical Partition (PAPR compliant)",
 951     .init = ppc_spapr_init,
 952     .reset = ppc_spapr_reset,
 953     .block_default_type = IF_SCSI,
 954     .max_cpus = MAX_CPUS,
 955     .no_parallel = 1,
 956     .boot_order = NULL,
 957 };
 958
 959 static void spapr_machine_init(void)
 960 {
 961     qemu_register_machine(&spapr_machine);
 962 }
 963
 964 machine_init(spapr_machine_init);