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
 264     _FDT((fdt_property_cell(fdt, "#address-cells", 0x2)));
 265     _FDT((fdt_property_cell(fdt, "#size-cells", 0x2)));
 266
 267     /* /chosen */
 268     _FDT((fdt_begin_node(fdt, "chosen")));
 269
 270     /* Set Form1_affinity */
 271     _FDT((fdt_property(fdt, "ibm,architecture-vec-5", vec5, sizeof(vec5))));
 272
 273     _FDT((fdt_property_string(fdt, "bootargs", kernel_cmdline)));
 274     _FDT((fdt_property(fdt, "linux,initrd-start",
 275                        &start_prop, sizeof(start_prop))));
 276     _FDT((fdt_property(fdt, "linux,initrd-end",
 277                        &end_prop, sizeof(end_prop))));
 278     if (kernel_size) {
 279         uint64_t kprop[2] = { cpu_to_be64(KERNEL_LOAD_ADDR),
 280                               cpu_to_be64(kernel_size) };
 281
 282         _FDT((fdt_property(fdt, "qemu,boot-kernel", &kprop, sizeof(kprop))));
 283     }
 284     if (boot_device) {
 285         _FDT((fdt_property_string(fdt, "qemu,boot-device", boot_device)));
 286     }
 287     _FDT((fdt_property_cell(fdt, "qemu,graphic-width", graphic_width)));
 288     _FDT((fdt_property_cell(fdt, "qemu,graphic-height", graphic_height)));
 289     _FDT((fdt_property_cell(fdt, "qemu,graphic-depth", graphic_depth)));
 290
 291     _FDT((fdt_end_node(fdt)));
 292
 293     /* cpus */
 294     _FDT((fdt_begin_node(fdt, "cpus")));
 295
 296     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 297     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 298
 299     modelname = g_strdup(cpu_model);
 300
 301     for (i = 0; i < strlen(modelname); i++) {
 302         modelname[i] = toupper(modelname[i]);
 303     }
 304
 305     /* This is needed during FDT finalization */
 306     spapr->cpu_model = g_strdup(modelname);
 307
 308     for (env = first_cpu; env != NULL; env = env->next_cpu) {
 309         CPUState *cpu = CPU(ppc_env_get_cpu(env));
 310         int index = cpu->cpu_index;
 311         uint32_t servers_prop[smp_threads];
 312         uint32_t gservers_prop[smp_threads * 2];
 313         char *nodename;
 314         uint32_t segs[] = {cpu_to_be32(28), cpu_to_be32(40),
 315                            0xffffffff, 0xffffffff};
 316         uint32_t tbfreq = kvm_enabled() ? kvmppc_get_tbfreq() : TIMEBASE_FREQ;
 317         uint32_t cpufreq = kvm_enabled() ? kvmppc_get_clockfreq() : 1000000000;
 318         uint32_t page_sizes_prop[64];
 319         size_t page_sizes_prop_size;
 320
 321         if ((index % smt) != 0) {
 322             continue;
 323         }
 324
 325         nodename = g_strdup_printf("%s@%x", modelname, index);
 326
 327         _FDT((fdt_begin_node(fdt, nodename)));
 328
 329         g_free(nodename);
 330
 331         _FDT((fdt_property_cell(fdt, "reg", index)));
 332         _FDT((fdt_property_string(fdt, "device_type", "cpu")));
 333
 334         _FDT((fdt_property_cell(fdt, "cpu-version", env->spr[SPR_PVR])));
 335         _FDT((fdt_property_cell(fdt, "dcache-block-size",
 336                                 env->dcache_line_size)));
 337         _FDT((fdt_property_cell(fdt, "icache-block-size",
 338                                 env->icache_line_size)));
 339         _FDT((fdt_property_cell(fdt, "timebase-frequency", tbfreq)));
 340         _FDT((fdt_property_cell(fdt, "clock-frequency", cpufreq)));
 341         _FDT((fdt_property_cell(fdt, "ibm,slb-size", env->slb_nr)));
 342         _FDT((fdt_property_string(fdt, "status", "okay")));
 343         _FDT((fdt_property(fdt, "64-bit", NULL, 0)));
 344
 345         /* Build interrupt servers and gservers properties */
 346         for (i = 0; i < smp_threads; i++) {
 347             servers_prop[i] = cpu_to_be32(index + i);
 348             /* Hack, direct the group queues back to cpu 0 */
 349             gservers_prop[i*2] = cpu_to_be32(index + i);
 350             gservers_prop[i*2 + 1] = 0;
 351         }
 352         _FDT((fdt_property(fdt, "ibm,ppc-interrupt-server#s",
 353                            servers_prop, sizeof(servers_prop))));
 354         _FDT((fdt_property(fdt, "ibm,ppc-interrupt-gserver#s",
 355                            gservers_prop, sizeof(gservers_prop))));
 356
 357         if (env->mmu_model & POWERPC_MMU_1TSEG) {
 358             _FDT((fdt_property(fdt, "ibm,processor-segment-sizes",
 359                                segs, sizeof(segs))));
 360         }
 361
 362         /* Advertise VMX/VSX (vector extensions) if available
 363          *   0 / no property == no vector extensions
 364          *   1               == VMX / Altivec available
 365          *   2               == VSX available */
 366         if (env->insns_flags & PPC_ALTIVEC) {
 367             uint32_t vmx = (env->insns_flags2 & PPC2_VSX) ? 2 : 1;
 368
 369             _FDT((fdt_property_cell(fdt, "ibm,vmx", vmx)));
 370         }
 371
 372         /* Advertise DFP (Decimal Floating Point) if available
 373          *   0 / no property == no DFP
 374          *   1               == DFP available */
 375         if (env->insns_flags2 & PPC2_DFP) {
 376             _FDT((fdt_property_cell(fdt, "ibm,dfp", 1)));
 377         }
 378
 379         page_sizes_prop_size = create_page_sizes_prop(env, page_sizes_prop,
 380                                                       sizeof(page_sizes_prop));
 381         if (page_sizes_prop_size) {
 382             _FDT((fdt_property(fdt, "ibm,segment-page-sizes",
 383                                page_sizes_prop, page_sizes_prop_size)));
 384         }
 385
 386         _FDT((fdt_end_node(fdt)));
 387     }
 388
 389     g_free(modelname);
 390
 391     _FDT((fdt_end_node(fdt)));
 392
 393     /* RTAS */
 394     _FDT((fdt_begin_node(fdt, "rtas")));
 395
 396     _FDT((fdt_property(fdt, "ibm,hypertas-functions", hypertas_prop,
 397                        sizeof(hypertas_prop))));
 398     _FDT((fdt_property(fdt, "qemu,hypertas-functions", qemu_hypertas_prop,
 399                        sizeof(qemu_hypertas_prop))));
 400
 401     _FDT((fdt_property(fdt, "ibm,associativity-reference-points",
 402         refpoints, sizeof(refpoints))));
 403
 404     _FDT((fdt_property_cell(fdt, "rtas-error-log-max", RTAS_ERROR_LOG_MAX)));
 405
 406     _FDT((fdt_end_node(fdt)));
 407
 408     /* interrupt controller */
 409     _FDT((fdt_begin_node(fdt, "interrupt-controller")));
 410
 411     _FDT((fdt_property_string(fdt, "device_type",
 412                               "PowerPC-External-Interrupt-Presentation")));
 413     _FDT((fdt_property_string(fdt, "compatible", "IBM,ppc-xicp")));
 414     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 415     _FDT((fdt_property(fdt, "ibm,interrupt-server-ranges",
 416                        interrupt_server_ranges_prop,
 417                        sizeof(interrupt_server_ranges_prop))));
 418     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 2)));
 419     _FDT((fdt_property_cell(fdt, "linux,phandle", PHANDLE_XICP)));
 420     _FDT((fdt_property_cell(fdt, "phandle", PHANDLE_XICP)));
 421
 422     _FDT((fdt_end_node(fdt)));
 423
 424     /* vdevice */
 425     _FDT((fdt_begin_node(fdt, "vdevice")));
 426
 427     _FDT((fdt_property_string(fdt, "device_type", "vdevice")));
 428     _FDT((fdt_property_string(fdt, "compatible", "IBM,vdevice")));
 429     _FDT((fdt_property_cell(fdt, "#address-cells", 0x1)));
 430     _FDT((fdt_property_cell(fdt, "#size-cells", 0x0)));
 431     _FDT((fdt_property_cell(fdt, "#interrupt-cells", 0x2)));
 432     _FDT((fdt_property(fdt, "interrupt-controller", NULL, 0)));
 433
 434     _FDT((fdt_end_node(fdt)));
 435
 436     /* event-sources */
 437     spapr_events_fdt_skel(fdt, epow_irq);
 438
 439     _FDT((fdt_end_node(fdt))); /* close root node */
 440     _FDT((fdt_finish(fdt)));
 441
 442     return fdt;
 443 }
 444
 445 static int spapr_populate_memory(sPAPREnvironment *spapr, void *fdt)
 446 {
 447     uint32_t associativity[] = {cpu_to_be32(0x4), cpu_to_be32(0x0),
 448                                 cpu_to_be32(0x0), cpu_to_be32(0x0),
 449                                 cpu_to_be32(0x0)};
 450     char mem_name[32];
 451     hwaddr node0_size, mem_start;
 452     uint64_t mem_reg_property[2];
 453     int i, off;
 454
 455     /* memory node(s) */
 456     node0_size = (nb_numa_nodes > 1) ? node_mem[0] : ram_size;
 457     if (spapr->rma_size > node0_size) {
 458         spapr->rma_size = node0_size;
 459     }
 460
 461     /* RMA */
 462     mem_reg_property[0] = 0;
 463     mem_reg_property[1] = cpu_to_be64(spapr->rma_size);
 464     off = fdt_add_subnode(fdt, 0, "memory@0");
 465     _FDT(off);
 466     _FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
 467     _FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
 468                       sizeof(mem_reg_property))));
 469     _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
 470                       sizeof(associativity))));
 471
 472     /* RAM: Node 0 */
 473     if (node0_size > spapr->rma_size) {
 474         mem_reg_property[0] = cpu_to_be64(spapr->rma_size);
 475         mem_reg_property[1] = cpu_to_be64(node0_size - spapr->rma_size);
 476
 477         sprintf(mem_name, "memory@" TARGET_FMT_lx, spapr->rma_size);
 478         off = fdt_add_subnode(fdt, 0, mem_name);
 479         _FDT(off);
 480         _FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
 481         _FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
 482                           sizeof(mem_reg_property))));
 483         _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
 484                           sizeof(associativity))));
 485     }
 486
 487     /* RAM: Node 1 and beyond */
 488     mem_start = node0_size;
 489     for (i = 1; i < nb_numa_nodes; i++) {
 490         mem_reg_property[0] = cpu_to_be64(mem_start);
 491         mem_reg_property[1] = cpu_to_be64(node_mem[i]);
 492         associativity[3] = associativity[4] = cpu_to_be32(i);
 493         sprintf(mem_name, "memory@" TARGET_FMT_lx, mem_start);
 494         off = fdt_add_subnode(fdt, 0, mem_name);
 495         _FDT(off);
 496         _FDT((fdt_setprop_string(fdt, off, "device_type", "memory")));
 497         _FDT((fdt_setprop(fdt, off, "reg", mem_reg_property,
 498                           sizeof(mem_reg_property))));
 499         _FDT((fdt_setprop(fdt, off, "ibm,associativity", associativity,
 500                           sizeof(associativity))));
 501         mem_start += node_mem[i];
 502     }
 503
 504     return 0;
 505 }
 506
 507 static void spapr_finalize_fdt(sPAPREnvironment *spapr,
 508                                hwaddr fdt_addr,
 509                                hwaddr rtas_addr,
 510                                hwaddr rtas_size)
 511 {
 512     int ret;
 513     void *fdt;
 514     sPAPRPHBState *phb;
 515
 516     fdt = g_malloc(FDT_MAX_SIZE);
 517
 518     /* open out the base tree into a temp buffer for the final tweaks */
 519     _FDT((fdt_open_into(spapr->fdt_skel, fdt, FDT_MAX_SIZE)));
 520
 521     ret = spapr_populate_memory(spapr, fdt);
 522     if (ret < 0) {
 523         fprintf(stderr, "couldn't setup memory nodes in fdt\n");
 524         exit(1);
 525     }
 526
 527     ret = spapr_populate_vdevice(spapr->vio_bus, fdt);
 528     if (ret < 0) {
 529         fprintf(stderr, "couldn't setup vio devices in fdt\n");
 530         exit(1);
 531     }
 532
 533     QLIST_FOREACH(phb, &spapr->phbs, list) {
 534         ret = spapr_populate_pci_dt(phb, PHANDLE_XICP, fdt);
 535     }
 536
 537     if (ret < 0) {
 538         fprintf(stderr, "couldn't setup PCI devices in fdt\n");
 539         exit(1);
 540     }
 541
 542     /* RTAS */
 543     ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
 544     if (ret < 0) {
 545         fprintf(stderr, "Couldn't set up RTAS device tree properties\n");
 546     }
 547
 548     /* Advertise NUMA via ibm,associativity */
 549     ret = spapr_fixup_cpu_dt(fdt, spapr);
 550     if (ret < 0) {
 551         fprintf(stderr, "Couldn't finalize CPU device tree properties\n");
 552     }
 553
 554     if (!spapr->has_graphics) {
 555         spapr_populate_chosen_stdout(fdt, spapr->vio_bus);
 556     }
 557
 558     _FDT((fdt_pack(fdt)));
 559
 560     if (fdt_totalsize(fdt) > FDT_MAX_SIZE) {
 561         hw_error("FDT too big ! 0x%x bytes (max is 0x%x)\n",
 562                  fdt_totalsize(fdt), FDT_MAX_SIZE);
 563         exit(1);
 564     }
 565
 566     cpu_physical_memory_write(fdt_addr, fdt, fdt_totalsize(fdt));
 567
 568     g_free(fdt);
 569 }
 570
 571 static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 572 {
 573     return (addr & 0x0fffffff) + KERNEL_LOAD_ADDR;
 574 }
 575
 576 static void emulate_spapr_hypercall(PowerPCCPU *cpu)
 577 {
 578     CPUPPCState *env = &cpu->env;
 579
 580     if (msr_pr) {
 581         hcall_dprintf("Hypercall made with MSR[PR]=1\n");
 582         env->gpr[3] = H_PRIVILEGE;
 583     } else {
 584         env->gpr[3] = spapr_hypercall(cpu, env->gpr[3], &env->gpr[4]);
 585     }
 586 }
 587
 588 static void spapr_reset_htab(sPAPREnvironment *spapr)
 589 {
 590     long shift;
 591
 592     /* allocate hash page table.  For now we always make this 16mb,
 593      * later we should probably make it scale to the size of guest
 594      * RAM */
 595
 596     shift = kvmppc_reset_htab(spapr->htab_shift);
 597
 598     if (shift > 0) {
 599         /* Kernel handles htab, we don't need to allocate one */
 600         spapr->htab_shift = shift;
 601     } else {
 602         if (!spapr->htab) {
 603             /* Allocate an htab if we don't yet have one */
 604             spapr->htab = qemu_memalign(HTAB_SIZE(spapr), HTAB_SIZE(spapr));
 605         }
 606
 607         /* And clear it */
 608         memset(spapr->htab, 0, HTAB_SIZE(spapr));
 609     }
 610
 611     /* Update the RMA size if necessary */
 612     if (spapr->vrma_adjust) {
 613         spapr->rma_size = kvmppc_rma_size(ram_size, spapr->htab_shift);
 614     }
 615 }
 616
 617 static void ppc_spapr_reset(void)
 618 {
 619     /* Reset the hash table & recalc the RMA */
 620     spapr_reset_htab(spapr);
 621
 622     qemu_devices_reset();
 623
 624     /* Load the fdt */
 625     spapr_finalize_fdt(spapr, spapr->fdt_addr, spapr->rtas_addr,
 626                        spapr->rtas_size);
 627
 628     /* Set up the entry state */
 629     first_cpu->gpr[3] = spapr->fdt_addr;
 630     first_cpu->gpr[5] = 0;
 631     first_cpu->halted = 0;
 632     first_cpu->nip = spapr->entry_point;
 633
 634 }
 635
 636 static void spapr_cpu_reset(void *opaque)
 637 {
 638     PowerPCCPU *cpu = opaque;
 639     CPUPPCState *env = &cpu->env;
 640
 641     cpu_reset(CPU(cpu));
 642
 643     /* All CPUs start halted.  CPU0 is unhalted from the machine level
 644      * reset code and the rest are explicitly started up by the guest
 645      * using an RTAS call */
 646     env->halted = 1;
 647
 648     env->spr[SPR_HIOR] = 0;
 649
 650     env->external_htab = spapr->htab;
 651     env->htab_base = -1;
 652     env->htab_mask = HTAB_SIZE(spapr) - 1;
 653     env->spr[SPR_SDR1] = (unsigned long)spapr->htab |
 654         (spapr->htab_shift - 18);
 655 }
 656
 657 static void spapr_create_nvram(sPAPREnvironment *spapr)
 658 {
 659     QemuOpts *machine_opts;
 660     DeviceState *dev;
 661
 662     dev = qdev_create(&spapr->vio_bus->bus, "spapr-nvram");
 663
 664     machine_opts = qemu_opts_find(qemu_find_opts("machine"), 0);
 665     if (machine_opts) {
 666         const char *drivename;
 667
 668         drivename = qemu_opt_get(machine_opts, "nvram");
 669         if (drivename) {
 670             BlockDriverState *bs;
 671
 672             bs = bdrv_find(drivename);
 673             if (!bs) {
 674                 fprintf(stderr, "No such block device \"%s\" for nvram\n",
 675                         drivename);
 676                 exit(1);
 677             }
 678             qdev_prop_set_drive_nofail(dev, "drive", bs);
 679         }
 680     }
 681
 682     qdev_init_nofail(dev);
 683
 684     spapr->nvram = (struct sPAPRNVRAM *)dev;
 685 }
 686
 687 /* Returns whether we want to use VGA or not */
 688 static int spapr_vga_init(PCIBus *pci_bus)
 689 {
 690     switch (vga_interface_type) {
 691     case VGA_NONE:
 692     case VGA_STD:
 693         return pci_vga_init(pci_bus) != NULL;
 694     default:
 695         fprintf(stderr, "This vga model is not supported,"
 696                 "currently it only supports -vga std\n");
 697         exit(0);
 698         break;
 699     }
 700 }
 701
 702 /* pSeries LPAR / sPAPR hardware init */
 703 static void ppc_spapr_init(QEMUMachineInitArgs *args)
 704 {
 705     ram_addr_t ram_size = args->ram_size;
 706     const char *cpu_model = args->cpu_model;
 707     const char *kernel_filename = args->kernel_filename;
 708     const char *kernel_cmdline = args->kernel_cmdline;
 709     const char *initrd_filename = args->initrd_filename;
 710     const char *boot_device = args->boot_device;
 711     PowerPCCPU *cpu;
 712     CPUPPCState *env;
 713     PCIHostState *phb;
 714     int i;
 715     MemoryRegion *sysmem = get_system_memory();
 716     MemoryRegion *ram = g_new(MemoryRegion, 1);
 717     hwaddr rma_alloc_size;
 718     uint32_t initrd_base = 0;
 719     long kernel_size = 0, initrd_size = 0;
 720     long load_limit, rtas_limit, fw_size;
 721     char *filename;
 722
 723     msi_supported = true;
 724
 725     spapr = g_malloc0(sizeof(*spapr));
 726     QLIST_INIT(&spapr->phbs);
 727
 728     cpu_ppc_hypercall = emulate_spapr_hypercall;
 729
 730     /* Allocate RMA if necessary */
 731     rma_alloc_size = kvmppc_alloc_rma("ppc_spapr.rma", sysmem);
 732
 733     if (rma_alloc_size == -1) {
 734         hw_error("qemu: Unable to create RMA\n");
 735         exit(1);
 736     }
 737
 738     if (rma_alloc_size && (rma_alloc_size < ram_size)) {
 739         spapr->rma_size = rma_alloc_size;
 740     } else {
 741         spapr->rma_size = ram_size;
 742
 743         /* With KVM, we don't actually know whether KVM supports an
 744          * unbounded RMA (PR KVM) or is limited by the hash table size
 745          * (HV KVM using VRMA), so we always assume the latter
 746          *
 747          * In that case, we also limit the initial allocations for RTAS
 748          * etc... to 256M since we have no way to know what the VRMA size
 749          * is going to be as it depends on the size of the hash table
 750          * isn't determined yet.
 751          */
 752         if (kvm_enabled()) {
 753             spapr->vrma_adjust = 1;
 754             spapr->rma_size = MIN(spapr->rma_size, 0x10000000);
 755         }
 756     }
 757
 758     /* We place the device tree and RTAS just below either the top of the RMA,
 759      * or just below 2GB, whichever is lowere, so that it can be
 760      * processed with 32-bit real mode code if necessary */
 761     rtas_limit = MIN(spapr->rma_size, 0x80000000);
 762     spapr->rtas_addr = rtas_limit - RTAS_MAX_SIZE;
 763     spapr->fdt_addr = spapr->rtas_addr - FDT_MAX_SIZE;
 764     load_limit = spapr->fdt_addr - FW_OVERHEAD;
 765
 766     /* We aim for a hash table of size 1/128 the size of RAM.  The
 767      * normal rule of thumb is 1/64 the size of RAM, but that's much
 768      * more than needed for the Linux guests we support. */
 769     spapr->htab_shift = 18; /* Minimum architected size */
 770     while (spapr->htab_shift <= 46) {
 771         if ((1ULL << (spapr->htab_shift + 7)) >= ram_size) {
 772             break;
 773         }
 774         spapr->htab_shift++;
 775     }
 776
 777     /* init CPUs */
 778     if (cpu_model == NULL) {
 779         cpu_model = kvm_enabled() ? "host" : "POWER7";
 780     }
 781     for (i = 0; i < smp_cpus; i++) {
 782         cpu = cpu_ppc_init(cpu_model);
 783         if (cpu == NULL) {
 784             fprintf(stderr, "Unable to find PowerPC CPU definition\n");
 785             exit(1);
 786         }
 787         env = &cpu->env;
 788
 789         /* Set time-base frequency to 512 MHz */
 790         cpu_ppc_tb_init(env, TIMEBASE_FREQ);
 791
 792         /* PAPR always has exception vectors in RAM not ROM */
 793         env->hreset_excp_prefix = 0;
 794
 795         /* Tell KVM that we're in PAPR mode */
 796         if (kvm_enabled()) {
 797             kvmppc_set_papr(cpu);
 798         }
 799
 800         qemu_register_reset(spapr_cpu_reset, cpu);
 801     }
 802
 803     /* allocate RAM */
 804     spapr->ram_limit = ram_size;
 805     if (spapr->ram_limit > rma_alloc_size) {
 806         ram_addr_t nonrma_base = rma_alloc_size;
 807         ram_addr_t nonrma_size = spapr->ram_limit - rma_alloc_size;
 808
 809         memory_region_init_ram(ram, "ppc_spapr.ram", nonrma_size);
 810         vmstate_register_ram_global(ram);
 811         memory_region_add_subregion(sysmem, nonrma_base, ram);
 812     }
 813
 814     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
 815     spapr->rtas_size = load_image_targphys(filename, spapr->rtas_addr,
 816                                            rtas_limit - spapr->rtas_addr);
 817     if (spapr->rtas_size < 0) {
 818         hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 819         exit(1);
 820     }
 821     if (spapr->rtas_size > RTAS_MAX_SIZE) {
 822         hw_error("RTAS too big ! 0x%lx bytes (max is 0x%x)\n",
 823                  spapr->rtas_size, RTAS_MAX_SIZE);
 824         exit(1);
 825     }
 826     g_free(filename);
 827
 828
 829     /* Set up Interrupt Controller */
 830     spapr->icp = xics_system_init(XICS_IRQS);
 831     spapr->next_irq = XICS_IRQ_BASE;
 832
 833     /* Set up EPOW events infrastructure */
 834     spapr_events_init(spapr);
 835
 836     /* Set up IOMMU */
 837     spapr_iommu_init();
 838
 839     /* Set up VIO bus */
 840     spapr->vio_bus = spapr_vio_bus_init();
 841
 842     for (i = 0; i < MAX_SERIAL_PORTS; i++) {
 843         if (serial_hds[i]) {
 844             spapr_vty_create(spapr->vio_bus, serial_hds[i]);
 845         }
 846     }
 847
 848     /* We always have at least the nvram device on VIO */
 849     spapr_create_nvram(spapr);
 850
 851     /* Set up PCI */
 852     spapr_pci_rtas_init();
 853
 854     phb = spapr_create_phb(spapr, 0, "pci");
 855
 856     for (i = 0; i < nb_nics; i++) {
 857         NICInfo *nd = &nd_table[i];
 858
 859         if (!nd->model) {
 860             nd->model = g_strdup("ibmveth");
 861         }
 862
 863         if (strcmp(nd->model, "ibmveth") == 0) {
 864             spapr_vlan_create(spapr->vio_bus, nd);
 865         } else {
 866             pci_nic_init_nofail(&nd_table[i], nd->model, NULL);
 867         }
 868     }
 869
 870     for (i = 0; i <= drive_get_max_bus(IF_SCSI); i++) {
 871         spapr_vscsi_create(spapr->vio_bus);
 872     }
 873
 874     /* Graphics */
 875     if (spapr_vga_init(phb->bus)) {
 876         spapr->has_graphics = true;
 877     }
 878
 879     if (usb_enabled(spapr->has_graphics)) {
 880         pci_create_simple(phb->bus, -1, "pci-ohci");
 881         if (spapr->has_graphics) {
 882             usbdevice_create("keyboard");
 883             usbdevice_create("mouse");
 884         }
 885     }
 886
 887     if (spapr->rma_size < (MIN_RMA_SLOF << 20)) {
 888         fprintf(stderr, "qemu: pSeries SLOF firmware requires >= "
 889                 "%ldM guest RMA (Real Mode Area memory)\n", MIN_RMA_SLOF);
 890         exit(1);
 891     }
 892
 893     if (kernel_filename) {
 894         uint64_t lowaddr = 0;
 895
 896         kernel_size = load_elf(kernel_filename, translate_kernel_address, NULL,
 897                                NULL, &lowaddr, NULL, 1, ELF_MACHINE, 0);
 898         if (kernel_size < 0) {
 899             kernel_size = load_image_targphys(kernel_filename,
 900                                               KERNEL_LOAD_ADDR,
 901                                               load_limit - KERNEL_LOAD_ADDR);
 902         }
 903         if (kernel_size < 0) {
 904             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 905                     kernel_filename);
 906             exit(1);
 907         }
 908
 909         /* load initrd */
 910         if (initrd_filename) {
 911             /* Try to locate the initrd in the gap between the kernel
 912              * and the firmware. Add a bit of space just in case
 913              */
 914             initrd_base = (KERNEL_LOAD_ADDR + kernel_size + 0x1ffff) & ~0xffff;
 915             initrd_size = load_image_targphys(initrd_filename, initrd_base,
 916                                               load_limit - initrd_base);
 917             if (initrd_size < 0) {
 918                 fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 919                         initrd_filename);
 920                 exit(1);
 921             }
 922         } else {
 923             initrd_base = 0;
 924             initrd_size = 0;
 925         }
 926     }
 927
 928     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, FW_FILE_NAME);
 929     fw_size = load_image_targphys(filename, 0, FW_MAX_SIZE);
 930     if (fw_size < 0) {
 931         hw_error("qemu: could not load LPAR rtas '%s'\n", filename);
 932         exit(1);
 933     }
 934     g_free(filename);
 935
 936     spapr->entry_point = 0x100;
 937
 938     /* Prepare the device tree */
 939     spapr->fdt_skel = spapr_create_fdt_skel(cpu_model,
 940                                             initrd_base, initrd_size,
 941                                             kernel_size,
 942                                             boot_device, kernel_cmdline,
 943                                             spapr->epow_irq);
 944     assert(spapr->fdt_skel != NULL);
 945 }
 946
 947 static QEMUMachine spapr_machine = {
 948     .name = "pseries",
 949     .desc = "pSeries Logical Partition (PAPR compliant)",
 950     .init = ppc_spapr_init,
 951     .reset = ppc_spapr_reset,
 952     .block_default_type = IF_SCSI,
 953     .max_cpus = MAX_CPUS,
 954     .no_parallel = 1,
 955     .boot_order = NULL,
 956 };
 957
 958 static void spapr_machine_init(void)
 959 {
 960     qemu_register_machine(&spapr_machine);
 961 }
 962
 963 machine_init(spapr_machine_init);