target/i386/sev.c

   1 /*
   2  * QEMU SEV support
   3  *
   4  * Copyright Advanced Micro Devices 2016-2018
   5  *
   6  * Author:
   7  *      Brijesh Singh <brijesh.singh@amd.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15
  16 #include <linux/kvm.h>
  17 #include <linux/kvm_para.h>
  18 #include <linux/psp-sev.h>
  19
  20 #include <sys/ioctl.h>
  21
  22 #include "qapi/error.h"
  23 #include "qom/object_interfaces.h"
  24 #include "qemu/base64.h"
  25 #include "qemu/module.h"
  26 #include "qemu/uuid.h"
  27 #include "qemu/error-report.h"
  28 #include "crypto/hash.h"
  29 #include "sysemu/kvm.h"
  30 #include "kvm/kvm_i386.h"
  31 #include "sev.h"
  32 #include "sysemu/sysemu.h"
  33 #include "sysemu/runstate.h"
  34 #include "trace.h"
  35 #include "migration/blocker.h"
  36 #include "qom/object.h"
  37 #include "monitor/monitor.h"
  38 #include "monitor/hmp-target.h"
  39 #include "qapi/qapi-commands-misc-target.h"
  40 #include "confidential-guest.h"
  41 #include "hw/i386/pc.h"
  42 #include "exec/address-spaces.h"
  43 #include "qemu/queue.h"
  44
  45 OBJECT_DECLARE_TYPE(SevCommonState, SevCommonStateClass, SEV_COMMON)
  46 OBJECT_DECLARE_TYPE(SevGuestState, SevCommonStateClass, SEV_GUEST)
  47 OBJECT_DECLARE_TYPE(SevSnpGuestState, SevCommonStateClass, SEV_SNP_GUEST)
  48
  49 /* hard code sha256 digest size */
  50 #define HASH_SIZE 32
  51
  52 typedef struct QEMU_PACKED SevHashTableEntry {
  53     QemuUUID guid;
  54     uint16_t len;
  55     uint8_t hash[HASH_SIZE];
  56 } SevHashTableEntry;
  57
  58 typedef struct QEMU_PACKED SevHashTable {
  59     QemuUUID guid;
  60     uint16_t len;
  61     SevHashTableEntry cmdline;
  62     SevHashTableEntry initrd;
  63     SevHashTableEntry kernel;
  64 } SevHashTable;
  65
  66 /*
  67  * Data encrypted by sev_encrypt_flash() must be padded to a multiple of
  68  * 16 bytes.
  69  */
  70 typedef struct QEMU_PACKED PaddedSevHashTable {
  71     SevHashTable ht;
  72     uint8_t padding[ROUND_UP(sizeof(SevHashTable), 16) - sizeof(SevHashTable)];
  73 } PaddedSevHashTable;
  74
  75 QEMU_BUILD_BUG_ON(sizeof(PaddedSevHashTable) % 16 != 0);
  76
  77 #define SEV_INFO_BLOCK_GUID     "00f771de-1a7e-4fcb-890e-68c77e2fb44e"
  78 typedef struct __attribute__((__packed__)) SevInfoBlock {
  79     /* SEV-ES Reset Vector Address */
  80     uint32_t reset_addr;
  81 } SevInfoBlock;
  82
  83 #define SEV_HASH_TABLE_RV_GUID  "7255371f-3a3b-4b04-927b-1da6efa8d454"
  84 typedef struct QEMU_PACKED SevHashTableDescriptor {
  85     /* SEV hash table area guest address */
  86     uint32_t base;
  87     /* SEV hash table area size (in bytes) */
  88     uint32_t size;
  89 } SevHashTableDescriptor;
  90
  91 struct SevCommonState {
  92     X86ConfidentialGuest parent_obj;
  93
  94     int kvm_type;
  95
  96     /* configuration parameters */
  97     char *sev_device;
  98     uint32_t cbitpos;
  99     uint32_t reduced_phys_bits;
 100     bool kernel_hashes;
 101
 102     /* runtime state */
 103     uint8_t api_major;
 104     uint8_t api_minor;
 105     uint8_t build_id;
 106     int sev_fd;
 107     SevState state;
 108
 109     uint32_t reset_cs;
 110     uint32_t reset_ip;
 111     bool reset_data_valid;
 112 };
 113
 114 struct SevCommonStateClass {
 115     X86ConfidentialGuestClass parent_class;
 116
 117     /* public */
 118     bool (*build_kernel_loader_hashes)(SevCommonState *sev_common,
 119                                        SevHashTableDescriptor *area,
 120                                        SevKernelLoaderContext *ctx,
 121                                        Error **errp);
 122     int (*launch_start)(SevCommonState *sev_common);
 123     void (*launch_finish)(SevCommonState *sev_common);
 124     int (*launch_update_data)(SevCommonState *sev_common, hwaddr gpa, uint8_t *ptr, size_t len);
 125     int (*kvm_init)(ConfidentialGuestSupport *cgs, Error **errp);
 126 };
 127
 128 /**
 129  * SevGuestState:
 130  *
 131  * The SevGuestState object is used for creating and managing a SEV
 132  * guest.
 133  *
 134  * # $QEMU \
 135  *         -object sev-guest,id=sev0 \
 136  *         -machine ...,memory-encryption=sev0
 137  */
 138 struct SevGuestState {
 139     SevCommonState parent_obj;
 140     gchar *measurement;
 141
 142     /* configuration parameters */
 143     uint32_t handle;
 144     uint32_t policy;
 145     char *dh_cert_file;
 146     char *session_file;
 147     OnOffAuto legacy_vm_type;
 148 };
 149
 150 struct SevSnpGuestState {
 151     SevCommonState parent_obj;
 152
 153     /* configuration parameters */
 154     char *guest_visible_workarounds;
 155     char *id_block_base64;
 156     uint8_t *id_block;
 157     char *id_auth_base64;
 158     uint8_t *id_auth;
 159     char *host_data;
 160
 161     struct kvm_sev_snp_launch_start kvm_start_conf;
 162     struct kvm_sev_snp_launch_finish kvm_finish_conf;
 163
 164     uint32_t kernel_hashes_offset;
 165     PaddedSevHashTable *kernel_hashes_data;
 166 };
 167
 168 #define DEFAULT_GUEST_POLICY    0x1 /* disable debug */
 169 #define DEFAULT_SEV_DEVICE      "/dev/sev"
 170 #define DEFAULT_SEV_SNP_POLICY  0x30000
 171
 172 typedef struct SevLaunchUpdateData {
 173     QTAILQ_ENTRY(SevLaunchUpdateData) next;
 174     hwaddr gpa;
 175     void *hva;
 176     size_t len;
 177     int type;
 178 } SevLaunchUpdateData;
 179
 180 static QTAILQ_HEAD(, SevLaunchUpdateData) launch_update;
 181
 182 static Error *sev_mig_blocker;
 183
 184 static const char *const sev_fw_errlist[] = {
 185     [SEV_RET_SUCCESS]                = "",
 186     [SEV_RET_INVALID_PLATFORM_STATE] = "Platform state is invalid",
 187     [SEV_RET_INVALID_GUEST_STATE]    = "Guest state is invalid",
 188     [SEV_RET_INAVLID_CONFIG]         = "Platform configuration is invalid",
 189     [SEV_RET_INVALID_LEN]            = "Buffer too small",
 190     [SEV_RET_ALREADY_OWNED]          = "Platform is already owned",
 191     [SEV_RET_INVALID_CERTIFICATE]    = "Certificate is invalid",
 192     [SEV_RET_POLICY_FAILURE]         = "Policy is not allowed",
 193     [SEV_RET_INACTIVE]               = "Guest is not active",
 194     [SEV_RET_INVALID_ADDRESS]        = "Invalid address",
 195     [SEV_RET_BAD_SIGNATURE]          = "Bad signature",
 196     [SEV_RET_BAD_MEASUREMENT]        = "Bad measurement",
 197     [SEV_RET_ASID_OWNED]             = "ASID is already owned",
 198     [SEV_RET_INVALID_ASID]           = "Invalid ASID",
 199     [SEV_RET_WBINVD_REQUIRED]        = "WBINVD is required",
 200     [SEV_RET_DFFLUSH_REQUIRED]       = "DF_FLUSH is required",
 201     [SEV_RET_INVALID_GUEST]          = "Guest handle is invalid",
 202     [SEV_RET_INVALID_COMMAND]        = "Invalid command",
 203     [SEV_RET_ACTIVE]                 = "Guest is active",
 204     [SEV_RET_HWSEV_RET_PLATFORM]     = "Hardware error",
 205     [SEV_RET_HWSEV_RET_UNSAFE]       = "Hardware unsafe",
 206     [SEV_RET_UNSUPPORTED]            = "Feature not supported",
 207     [SEV_RET_INVALID_PARAM]          = "Invalid parameter",
 208     [SEV_RET_RESOURCE_LIMIT]         = "Required firmware resource depleted",
 209     [SEV_RET_SECURE_DATA_INVALID]    = "Part-specific integrity check failure",
 210 };
 211
 212 #define SEV_FW_MAX_ERROR      ARRAY_SIZE(sev_fw_errlist)
 213
 214 /* <linux/kvm.h> doesn't expose this, so re-use the max from kvm.c */
 215 #define KVM_MAX_CPUID_ENTRIES 100
 216
 217 typedef struct KvmCpuidInfo {
 218     struct kvm_cpuid2 cpuid;
 219     struct kvm_cpuid_entry2 entries[KVM_MAX_CPUID_ENTRIES];
 220 } KvmCpuidInfo;
 221
 222 #define SNP_CPUID_FUNCTION_MAXCOUNT 64
 223 #define SNP_CPUID_FUNCTION_UNKNOWN 0xFFFFFFFF
 224
 225 typedef struct {
 226     uint32_t eax_in;
 227     uint32_t ecx_in;
 228     uint64_t xcr0_in;
 229     uint64_t xss_in;
 230     uint32_t eax;
 231     uint32_t ebx;
 232     uint32_t ecx;
 233     uint32_t edx;
 234     uint64_t reserved;
 235 } __attribute__((packed)) SnpCpuidFunc;
 236
 237 typedef struct {
 238     uint32_t count;
 239     uint32_t reserved1;
 240     uint64_t reserved2;
 241     SnpCpuidFunc entries[SNP_CPUID_FUNCTION_MAXCOUNT];
 242 } __attribute__((packed)) SnpCpuidInfo;
 243
 244 static int
 245 sev_ioctl(int fd, int cmd, void *data, int *error)
 246 {
 247     int r;
 248     struct kvm_sev_cmd input;
 249
 250     memset(&input, 0x0, sizeof(input));
 251
 252     input.id = cmd;
 253     input.sev_fd = fd;
 254     input.data = (uintptr_t)data;
 255
 256     r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_OP, &input);
 257
 258     if (error) {
 259         *error = input.error;
 260     }
 261
 262     return r;
 263 }
 264
 265 static int
 266 sev_platform_ioctl(int fd, int cmd, void *data, int *error)
 267 {
 268     int r;
 269     struct sev_issue_cmd arg;
 270
 271     arg.cmd = cmd;
 272     arg.data = (unsigned long)data;
 273     r = ioctl(fd, SEV_ISSUE_CMD, &arg);
 274     if (error) {
 275         *error = arg.error;
 276     }
 277
 278     return r;
 279 }
 280
 281 static const char *
 282 fw_error_to_str(int code)
 283 {
 284     if (code < 0 || code >= SEV_FW_MAX_ERROR) {
 285         return "unknown error";
 286     }
 287
 288     return sev_fw_errlist[code];
 289 }
 290
 291 static bool
 292 sev_check_state(const SevCommonState *sev_common, SevState state)
 293 {
 294     assert(sev_common);
 295     return sev_common->state == state ? true : false;
 296 }
 297
 298 static void
 299 sev_set_guest_state(SevCommonState *sev_common, SevState new_state)
 300 {
 301     assert(new_state < SEV_STATE__MAX);
 302     assert(sev_common);
 303
 304     trace_kvm_sev_change_state(SevState_str(sev_common->state),
 305                                SevState_str(new_state));
 306     sev_common->state = new_state;
 307 }
 308
 309 static void
 310 sev_ram_block_added(RAMBlockNotifier *n, void *host, size_t size,
 311                     size_t max_size)
 312 {
 313     int r;
 314     struct kvm_enc_region range;
 315     ram_addr_t offset;
 316     MemoryRegion *mr;
 317
 318     /*
 319      * The RAM device presents a memory region that should be treated
 320      * as IO region and should not be pinned.
 321      */
 322     mr = memory_region_from_host(host, &offset);
 323     if (mr && memory_region_is_ram_device(mr)) {
 324         return;
 325     }
 326
 327     range.addr = (uintptr_t)host;
 328     range.size = max_size;
 329
 330     trace_kvm_memcrypt_register_region(host, max_size);
 331     r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_REG_REGION, &range);
 332     if (r) {
 333         error_report("%s: failed to register region (%p+%#zx) error '%s'",
 334                      __func__, host, max_size, strerror(errno));
 335         exit(1);
 336     }
 337 }
 338
 339 static void
 340 sev_ram_block_removed(RAMBlockNotifier *n, void *host, size_t size,
 341                       size_t max_size)
 342 {
 343     int r;
 344     struct kvm_enc_region range;
 345     ram_addr_t offset;
 346     MemoryRegion *mr;
 347
 348     /*
 349      * The RAM device presents a memory region that should be treated
 350      * as IO region and should not have been pinned.
 351      */
 352     mr = memory_region_from_host(host, &offset);
 353     if (mr && memory_region_is_ram_device(mr)) {
 354         return;
 355     }
 356
 357     range.addr = (uintptr_t)host;
 358     range.size = max_size;
 359
 360     trace_kvm_memcrypt_unregister_region(host, max_size);
 361     r = kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_UNREG_REGION, &range);
 362     if (r) {
 363         error_report("%s: failed to unregister region (%p+%#zx)",
 364                      __func__, host, max_size);
 365     }
 366 }
 367
 368 static struct RAMBlockNotifier sev_ram_notifier = {
 369     .ram_block_added = sev_ram_block_added,
 370     .ram_block_removed = sev_ram_block_removed,
 371 };
 372
 373 bool
 374 sev_enabled(void)
 375 {
 376     ConfidentialGuestSupport *cgs = MACHINE(qdev_get_machine())->cgs;
 377
 378     return !!object_dynamic_cast(OBJECT(cgs), TYPE_SEV_COMMON);
 379 }
 380
 381 bool
 382 sev_snp_enabled(void)
 383 {
 384     ConfidentialGuestSupport *cgs = MACHINE(qdev_get_machine())->cgs;
 385
 386     return !!object_dynamic_cast(OBJECT(cgs), TYPE_SEV_SNP_GUEST);
 387 }
 388
 389 bool
 390 sev_es_enabled(void)
 391 {
 392     ConfidentialGuestSupport *cgs = MACHINE(qdev_get_machine())->cgs;
 393
 394     return sev_snp_enabled() ||
 395             (sev_enabled() && SEV_GUEST(cgs)->policy & SEV_POLICY_ES);
 396 }
 397
 398 uint32_t
 399 sev_get_cbit_position(void)
 400 {
 401     SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
 402
 403     return sev_common ? sev_common->cbitpos : 0;
 404 }
 405
 406 uint32_t
 407 sev_get_reduced_phys_bits(void)
 408 {
 409     SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
 410
 411     return sev_common ? sev_common->reduced_phys_bits : 0;
 412 }
 413
 414 static SevInfo *sev_get_info(void)
 415 {
 416     SevInfo *info;
 417     SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
 418
 419     info = g_new0(SevInfo, 1);
 420     info->enabled = sev_enabled();
 421
 422     if (info->enabled) {
 423         info->api_major = sev_common->api_major;
 424         info->api_minor = sev_common->api_minor;
 425         info->build_id = sev_common->build_id;
 426         info->state = sev_common->state;
 427
 428         if (sev_snp_enabled()) {
 429             info->sev_type = SEV_GUEST_TYPE_SEV_SNP;
 430             info->u.sev_snp.snp_policy =
 431                 object_property_get_uint(OBJECT(sev_common), "policy", NULL);
 432         } else {
 433             info->sev_type = SEV_GUEST_TYPE_SEV;
 434             info->u.sev.handle = SEV_GUEST(sev_common)->handle;
 435             info->u.sev.policy =
 436                 (uint32_t)object_property_get_uint(OBJECT(sev_common),
 437                                                    "policy", NULL);
 438         }
 439     }
 440
 441     return info;
 442 }
 443
 444 SevInfo *qmp_query_sev(Error **errp)
 445 {
 446     SevInfo *info;
 447
 448     info = sev_get_info();
 449     if (!info) {
 450         error_setg(errp, "SEV feature is not available");
 451         return NULL;
 452     }
 453
 454     return info;
 455 }
 456
 457 void hmp_info_sev(Monitor *mon, const QDict *qdict)
 458 {
 459     SevInfo *info = sev_get_info();
 460
 461     if (!info || !info->enabled) {
 462         monitor_printf(mon, "SEV is not enabled\n");
 463         goto out;
 464     }
 465
 466     monitor_printf(mon, "SEV type: %s\n", SevGuestType_str(info->sev_type));
 467     monitor_printf(mon, "state: %s\n", SevState_str(info->state));
 468     monitor_printf(mon, "build: %d\n", info->build_id);
 469     monitor_printf(mon, "api version: %d.%d\n", info->api_major,
 470                    info->api_minor);
 471
 472     if (sev_snp_enabled()) {
 473         monitor_printf(mon, "debug: %s\n",
 474                        info->u.sev_snp.snp_policy & SEV_SNP_POLICY_DBG ? "on"
 475                                                                        : "off");
 476         monitor_printf(mon, "SMT allowed: %s\n",
 477                        info->u.sev_snp.snp_policy & SEV_SNP_POLICY_SMT ? "on"
 478                                                                        : "off");
 479     } else {
 480         monitor_printf(mon, "handle: %d\n", info->u.sev.handle);
 481         monitor_printf(mon, "debug: %s\n",
 482                        info->u.sev.policy & SEV_POLICY_NODBG ? "off" : "on");
 483         monitor_printf(mon, "key-sharing: %s\n",
 484                        info->u.sev.policy & SEV_POLICY_NOKS ? "off" : "on");
 485     }
 486
 487 out:
 488     qapi_free_SevInfo(info);
 489 }
 490
 491 static int
 492 sev_get_pdh_info(int fd, guchar **pdh, size_t *pdh_len, guchar **cert_chain,
 493                  size_t *cert_chain_len, Error **errp)
 494 {
 495     guchar *pdh_data = NULL;
 496     guchar *cert_chain_data = NULL;
 497     struct sev_user_data_pdh_cert_export export = {};
 498     int err, r;
 499
 500     /* query the certificate length */
 501     r = sev_platform_ioctl(fd, SEV_PDH_CERT_EXPORT, &export, &err);
 502     if (r < 0) {
 503         if (err != SEV_RET_INVALID_LEN) {
 504             error_setg(errp, "SEV: Failed to export PDH cert"
 505                              " ret=%d fw_err=%d (%s)",
 506                        r, err, fw_error_to_str(err));
 507             return 1;
 508         }
 509     }
 510
 511     pdh_data = g_new(guchar, export.pdh_cert_len);
 512     cert_chain_data = g_new(guchar, export.cert_chain_len);
 513     export.pdh_cert_address = (unsigned long)pdh_data;
 514     export.cert_chain_address = (unsigned long)cert_chain_data;
 515
 516     r = sev_platform_ioctl(fd, SEV_PDH_CERT_EXPORT, &export, &err);
 517     if (r < 0) {
 518         error_setg(errp, "SEV: Failed to export PDH cert ret=%d fw_err=%d (%s)",
 519                    r, err, fw_error_to_str(err));
 520         goto e_free;
 521     }
 522
 523     *pdh = pdh_data;
 524     *pdh_len = export.pdh_cert_len;
 525     *cert_chain = cert_chain_data;
 526     *cert_chain_len = export.cert_chain_len;
 527     return 0;
 528
 529 e_free:
 530     g_free(pdh_data);
 531     g_free(cert_chain_data);
 532     return 1;
 533 }
 534
 535 static int sev_get_cpu0_id(int fd, guchar **id, size_t *id_len, Error **errp)
 536 {
 537     guchar *id_data;
 538     struct sev_user_data_get_id2 get_id2 = {};
 539     int err, r;
 540
 541     /* query the ID length */
 542     r = sev_platform_ioctl(fd, SEV_GET_ID2, &get_id2, &err);
 543     if (r < 0 && err != SEV_RET_INVALID_LEN) {
 544         error_setg(errp, "SEV: Failed to get ID ret=%d fw_err=%d (%s)",
 545                    r, err, fw_error_to_str(err));
 546         return 1;
 547     }
 548
 549     id_data = g_new(guchar, get_id2.length);
 550     get_id2.address = (unsigned long)id_data;
 551
 552     r = sev_platform_ioctl(fd, SEV_GET_ID2, &get_id2, &err);
 553     if (r < 0) {
 554         error_setg(errp, "SEV: Failed to get ID ret=%d fw_err=%d (%s)",
 555                    r, err, fw_error_to_str(err));
 556         goto err;
 557     }
 558
 559     *id = id_data;
 560     *id_len = get_id2.length;
 561     return 0;
 562
 563 err:
 564     g_free(id_data);
 565     return 1;
 566 }
 567
 568 static SevCapability *sev_get_capabilities(Error **errp)
 569 {
 570     SevCapability *cap = NULL;
 571     guchar *pdh_data = NULL;
 572     guchar *cert_chain_data = NULL;
 573     guchar *cpu0_id_data = NULL;
 574     size_t pdh_len = 0, cert_chain_len = 0, cpu0_id_len = 0;
 575     uint32_t ebx;
 576     int fd;
 577     SevCommonState *sev_common;
 578     char *sev_device;
 579
 580     if (!kvm_enabled()) {
 581         error_setg(errp, "KVM not enabled");
 582         return NULL;
 583     }
 584     if (kvm_vm_ioctl(kvm_state, KVM_MEMORY_ENCRYPT_OP, NULL) < 0) {
 585         error_setg(errp, "SEV is not enabled in KVM");
 586         return NULL;
 587     }
 588
 589     sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
 590     if (sev_common) {
 591         sev_device = object_property_get_str(OBJECT(sev_common), "sev-device",
 592                                              &error_abort);
 593     } else {
 594         sev_device = g_strdup(DEFAULT_SEV_DEVICE);
 595     }
 596
 597     fd = open(sev_device, O_RDWR);
 598     if (fd < 0) {
 599         error_setg_errno(errp, errno, "SEV: Failed to open %s",
 600                          sev_device);
 601         g_free(sev_device);
 602         return NULL;
 603     }
 604     g_free(sev_device);
 605
 606     if (sev_get_pdh_info(fd, &pdh_data, &pdh_len,
 607                          &cert_chain_data, &cert_chain_len, errp)) {
 608         goto out;
 609     }
 610
 611     if (sev_get_cpu0_id(fd, &cpu0_id_data, &cpu0_id_len, errp)) {
 612         goto out;
 613     }
 614
 615     cap = g_new0(SevCapability, 1);
 616     cap->pdh = g_base64_encode(pdh_data, pdh_len);
 617     cap->cert_chain = g_base64_encode(cert_chain_data, cert_chain_len);
 618     cap->cpu0_id = g_base64_encode(cpu0_id_data, cpu0_id_len);
 619
 620     host_cpuid(0x8000001F, 0, NULL, &ebx, NULL, NULL);
 621     cap->cbitpos = ebx & 0x3f;
 622
 623     /*
 624      * When SEV feature is enabled, we loose one bit in guest physical
 625      * addressing.
 626      */
 627     cap->reduced_phys_bits = 1;
 628
 629 out:
 630     g_free(cpu0_id_data);
 631     g_free(pdh_data);
 632     g_free(cert_chain_data);
 633     close(fd);
 634     return cap;
 635 }
 636
 637 SevCapability *qmp_query_sev_capabilities(Error **errp)
 638 {
 639     return sev_get_capabilities(errp);
 640 }
 641
 642 static OvmfSevMetadata *ovmf_sev_metadata_table;
 643
 644 #define OVMF_SEV_META_DATA_GUID "dc886566-984a-4798-A75e-5585a7bf67cc"
 645 typedef struct __attribute__((__packed__)) OvmfSevMetadataOffset {
 646     uint32_t offset;
 647 } OvmfSevMetadataOffset;
 648
 649 OvmfSevMetadata *pc_system_get_ovmf_sev_metadata_ptr(void)
 650 {
 651     return ovmf_sev_metadata_table;
 652 }
 653
 654 void pc_system_parse_sev_metadata(uint8_t *flash_ptr, size_t flash_size)
 655 {
 656     OvmfSevMetadata     *metadata;
 657     OvmfSevMetadataOffset  *data;
 658
 659     if (!pc_system_ovmf_table_find(OVMF_SEV_META_DATA_GUID, (uint8_t **)&data,
 660                                    NULL)) {
 661         return;
 662     }
 663
 664     metadata = (OvmfSevMetadata *)(flash_ptr + flash_size - data->offset);
 665     if (memcmp(metadata->signature, "ASEV", 4) != 0 ||
 666         metadata->len < sizeof(OvmfSevMetadata) ||
 667         metadata->len > flash_size - data->offset) {
 668         return;
 669     }
 670
 671     ovmf_sev_metadata_table = g_memdup2(metadata, metadata->len);
 672 }
 673
 674 static SevAttestationReport *sev_get_attestation_report(const char *mnonce,
 675                                                         Error **errp)
 676 {
 677     struct kvm_sev_attestation_report input = {};
 678     SevAttestationReport *report = NULL;
 679     SevCommonState *sev_common;
 680     g_autofree guchar *data = NULL;
 681     g_autofree guchar *buf = NULL;
 682     gsize len;
 683     int err = 0, ret;
 684
 685     if (!sev_enabled()) {
 686         error_setg(errp, "SEV is not enabled");
 687         return NULL;
 688     }
 689
 690     /* lets decode the mnonce string */
 691     buf = g_base64_decode(mnonce, &len);
 692     if (!buf) {
 693         error_setg(errp, "SEV: failed to decode mnonce input");
 694         return NULL;
 695     }
 696
 697     /* verify the input mnonce length */
 698     if (len != sizeof(input.mnonce)) {
 699         error_setg(errp, "SEV: mnonce must be %zu bytes (got %" G_GSIZE_FORMAT ")",
 700                 sizeof(input.mnonce), len);
 701         return NULL;
 702     }
 703
 704     sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
 705
 706     /* Query the report length */
 707     ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_GET_ATTESTATION_REPORT,
 708             &input, &err);
 709     if (ret < 0) {
 710         if (err != SEV_RET_INVALID_LEN) {
 711             error_setg(errp, "SEV: Failed to query the attestation report"
 712                              " length ret=%d fw_err=%d (%s)",
 713                        ret, err, fw_error_to_str(err));
 714             return NULL;
 715         }
 716     }
 717
 718     data = g_malloc(input.len);
 719     input.uaddr = (unsigned long)data;
 720     memcpy(input.mnonce, buf, sizeof(input.mnonce));
 721
 722     /* Query the report */
 723     ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_GET_ATTESTATION_REPORT,
 724             &input, &err);
 725     if (ret) {
 726         error_setg_errno(errp, errno, "SEV: Failed to get attestation report"
 727                 " ret=%d fw_err=%d (%s)", ret, err, fw_error_to_str(err));
 728         return NULL;
 729     }
 730
 731     report = g_new0(SevAttestationReport, 1);
 732     report->data = g_base64_encode(data, input.len);
 733
 734     trace_kvm_sev_attestation_report(mnonce, report->data);
 735
 736     return report;
 737 }
 738
 739 SevAttestationReport *qmp_query_sev_attestation_report(const char *mnonce,
 740                                                        Error **errp)
 741 {
 742     return sev_get_attestation_report(mnonce, errp);
 743 }
 744
 745 static int
 746 sev_read_file_base64(const char *filename, guchar **data, gsize *len)
 747 {
 748     gsize sz;
 749     g_autofree gchar *base64 = NULL;
 750     GError *error = NULL;
 751
 752     if (!g_file_get_contents(filename, &base64, &sz, &error)) {
 753         error_report("SEV: Failed to read '%s' (%s)", filename, error->message);
 754         g_error_free(error);
 755         return -1;
 756     }
 757
 758     *data = g_base64_decode(base64, len);
 759     return 0;
 760 }
 761
 762 static int
 763 sev_snp_launch_start(SevCommonState *sev_common)
 764 {
 765     int fw_error, rc;
 766     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(sev_common);
 767     struct kvm_sev_snp_launch_start *start = &sev_snp_guest->kvm_start_conf;
 768
 769     trace_kvm_sev_snp_launch_start(start->policy,
 770                                    sev_snp_guest->guest_visible_workarounds);
 771
 772     if (!kvm_enable_hypercall(BIT_ULL(KVM_HC_MAP_GPA_RANGE))) {
 773             return 1;
 774     }
 775
 776     rc = sev_ioctl(sev_common->sev_fd, KVM_SEV_SNP_LAUNCH_START,
 777                    start, &fw_error);
 778     if (rc < 0) {
 779         error_report("%s: SNP_LAUNCH_START ret=%d fw_error=%d '%s'",
 780                 __func__, rc, fw_error, fw_error_to_str(fw_error));
 781         return 1;
 782     }
 783
 784     QTAILQ_INIT(&launch_update);
 785
 786     sev_set_guest_state(sev_common, SEV_STATE_LAUNCH_UPDATE);
 787
 788     return 0;
 789 }
 790
 791 static int
 792 sev_launch_start(SevCommonState *sev_common)
 793 {
 794     gsize sz;
 795     int ret = 1;
 796     int fw_error, rc;
 797     SevGuestState *sev_guest = SEV_GUEST(sev_common);
 798     struct kvm_sev_launch_start start = {
 799         .handle = sev_guest->handle, .policy = sev_guest->policy
 800     };
 801     guchar *session = NULL, *dh_cert = NULL;
 802
 803     if (sev_guest->session_file) {
 804         if (sev_read_file_base64(sev_guest->session_file, &session, &sz) < 0) {
 805             goto out;
 806         }
 807         start.session_uaddr = (unsigned long)session;
 808         start.session_len = sz;
 809     }
 810
 811     if (sev_guest->dh_cert_file) {
 812         if (sev_read_file_base64(sev_guest->dh_cert_file, &dh_cert, &sz) < 0) {
 813             goto out;
 814         }
 815         start.dh_uaddr = (unsigned long)dh_cert;
 816         start.dh_len = sz;
 817     }
 818
 819     trace_kvm_sev_launch_start(start.policy, session, dh_cert);
 820     rc = sev_ioctl(sev_common->sev_fd, KVM_SEV_LAUNCH_START, &start, &fw_error);
 821     if (rc < 0) {
 822         error_report("%s: LAUNCH_START ret=%d fw_error=%d '%s'",
 823                 __func__, ret, fw_error, fw_error_to_str(fw_error));
 824         goto out;
 825     }
 826
 827     sev_set_guest_state(sev_common, SEV_STATE_LAUNCH_UPDATE);
 828     sev_guest->handle = start.handle;
 829     ret = 0;
 830
 831 out:
 832     g_free(session);
 833     g_free(dh_cert);
 834     return ret;
 835 }
 836
 837 static void
 838 sev_snp_cpuid_report_mismatches(SnpCpuidInfo *old,
 839                                 SnpCpuidInfo *new)
 840 {
 841     size_t i;
 842
 843     if (old->count != new->count) {
 844         error_report("SEV-SNP: CPUID validation failed due to count mismatch, "
 845                      "provided: %d, expected: %d", old->count, new->count);
 846         return;
 847     }
 848
 849     for (i = 0; i < old->count; i++) {
 850         SnpCpuidFunc *old_func, *new_func;
 851
 852         old_func = &old->entries[i];
 853         new_func = &new->entries[i];
 854
 855         if (memcmp(old_func, new_func, sizeof(SnpCpuidFunc))) {
 856             error_report("SEV-SNP: CPUID validation failed for function 0x%x, index: 0x%x, "
 857                          "provided: eax:0x%08x, ebx: 0x%08x, ecx: 0x%08x, edx: 0x%08x, "
 858                          "expected: eax:0x%08x, ebx: 0x%08x, ecx: 0x%08x, edx: 0x%08x",
 859                          old_func->eax_in, old_func->ecx_in,
 860                          old_func->eax, old_func->ebx, old_func->ecx, old_func->edx,
 861                          new_func->eax, new_func->ebx, new_func->ecx, new_func->edx);
 862         }
 863     }
 864 }
 865
 866 static const char *
 867 snp_page_type_to_str(int type)
 868 {
 869     switch (type) {
 870     case KVM_SEV_SNP_PAGE_TYPE_NORMAL: return "Normal";
 871     case KVM_SEV_SNP_PAGE_TYPE_ZERO: return "Zero";
 872     case KVM_SEV_SNP_PAGE_TYPE_UNMEASURED: return "Unmeasured";
 873     case KVM_SEV_SNP_PAGE_TYPE_SECRETS: return "Secrets";
 874     case KVM_SEV_SNP_PAGE_TYPE_CPUID: return "Cpuid";
 875     default: return "unknown";
 876     }
 877 }
 878
 879 static int
 880 sev_snp_launch_update(SevSnpGuestState *sev_snp_guest,
 881                       SevLaunchUpdateData *data)
 882 {
 883     int ret, fw_error;
 884     SnpCpuidInfo snp_cpuid_info;
 885     struct kvm_sev_snp_launch_update update = {0};
 886
 887     if (!data->hva || !data->len) {
 888         error_report("SNP_LAUNCH_UPDATE called with invalid address"
 889                      "/ length: %p / %zx",
 890                      data->hva, data->len);
 891         return 1;
 892     }
 893
 894     if (data->type == KVM_SEV_SNP_PAGE_TYPE_CPUID) {
 895         /* Save a copy for comparison in case the LAUNCH_UPDATE fails */
 896         memcpy(&snp_cpuid_info, data->hva, sizeof(snp_cpuid_info));
 897     }
 898
 899     update.uaddr = (__u64)(unsigned long)data->hva;
 900     update.gfn_start = data->gpa >> TARGET_PAGE_BITS;
 901     update.len = data->len;
 902     update.type = data->type;
 903
 904     /*
 905      * KVM_SEV_SNP_LAUNCH_UPDATE requires that GPA ranges have the private
 906      * memory attribute set in advance.
 907      */
 908     ret = kvm_set_memory_attributes_private(data->gpa, data->len);
 909     if (ret) {
 910         error_report("SEV-SNP: failed to configure initial"
 911                      "private guest memory");
 912         goto out;
 913     }
 914
 915     while (update.len || ret == -EAGAIN) {
 916         trace_kvm_sev_snp_launch_update(update.uaddr, update.gfn_start <<
 917                                         TARGET_PAGE_BITS, update.len,
 918                                         snp_page_type_to_str(update.type));
 919
 920         ret = sev_ioctl(SEV_COMMON(sev_snp_guest)->sev_fd,
 921                         KVM_SEV_SNP_LAUNCH_UPDATE,
 922                         &update, &fw_error);
 923         if (ret && ret != -EAGAIN) {
 924             error_report("SNP_LAUNCH_UPDATE ret=%d fw_error=%d '%s'",
 925                          ret, fw_error, fw_error_to_str(fw_error));
 926
 927             if (data->type == KVM_SEV_SNP_PAGE_TYPE_CPUID) {
 928                 sev_snp_cpuid_report_mismatches(&snp_cpuid_info, data->hva);
 929                 error_report("SEV-SNP: failed update CPUID page");
 930             }
 931             break;
 932         }
 933     }
 934
 935 out:
 936     if (!ret && update.gfn_start << TARGET_PAGE_BITS != data->gpa + data->len) {
 937         error_report("SEV-SNP: expected update of GPA range %"
 938                      HWADDR_PRIx "-%" HWADDR_PRIx ","
 939                      "got GPA range %" HWADDR_PRIx "-%llx",
 940                      data->gpa, data->gpa + data->len, data->gpa,
 941                      update.gfn_start << TARGET_PAGE_BITS);
 942         ret = -EIO;
 943     }
 944
 945     return ret;
 946 }
 947
 948 static uint32_t
 949 sev_snp_mask_cpuid_features(X86ConfidentialGuest *cg, uint32_t feature, uint32_t index,
 950                             int reg, uint32_t value)
 951 {
 952     switch (feature) {
 953     case 1:
 954         if (reg == R_ECX) {
 955             return value & ~CPUID_EXT_TSC_DEADLINE_TIMER;
 956         }
 957         break;
 958     case 7:
 959         if (index == 0 && reg == R_EBX) {
 960             return value & ~CPUID_7_0_EBX_TSC_ADJUST;
 961         }
 962         if (index == 0 && reg == R_EDX) {
 963             return value & ~(CPUID_7_0_EDX_SPEC_CTRL |
 964                              CPUID_7_0_EDX_STIBP |
 965                              CPUID_7_0_EDX_FLUSH_L1D |
 966                              CPUID_7_0_EDX_ARCH_CAPABILITIES |
 967                              CPUID_7_0_EDX_CORE_CAPABILITY |
 968                              CPUID_7_0_EDX_SPEC_CTRL_SSBD);
 969         }
 970         break;
 971     case 0x80000008:
 972         if (reg == R_EBX) {
 973             return value & ~CPUID_8000_0008_EBX_VIRT_SSBD;
 974         }
 975         break;
 976     }
 977     return value;
 978 }
 979
 980 static int
 981 sev_launch_update_data(SevCommonState *sev_common, hwaddr gpa,
 982                        uint8_t *addr, size_t len)
 983 {
 984     int ret, fw_error;
 985     struct kvm_sev_launch_update_data update;
 986
 987     if (!addr || !len) {
 988         return 1;
 989     }
 990
 991     update.uaddr = (uintptr_t)addr;
 992     update.len = len;
 993     trace_kvm_sev_launch_update_data(addr, len);
 994     ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_LAUNCH_UPDATE_DATA,
 995                     &update, &fw_error);
 996     if (ret) {
 997         error_report("%s: LAUNCH_UPDATE ret=%d fw_error=%d '%s'",
 998                 __func__, ret, fw_error, fw_error_to_str(fw_error));
 999     }
1000
1001     return ret;
1002 }
1003
1004 static int
1005 sev_launch_update_vmsa(SevGuestState *sev_guest)
1006 {
1007     int ret, fw_error;
1008
1009     ret = sev_ioctl(SEV_COMMON(sev_guest)->sev_fd, KVM_SEV_LAUNCH_UPDATE_VMSA,
1010                     NULL, &fw_error);
1011     if (ret) {
1012         error_report("%s: LAUNCH_UPDATE_VMSA ret=%d fw_error=%d '%s'",
1013                 __func__, ret, fw_error, fw_error_to_str(fw_error));
1014     }
1015
1016     return ret;
1017 }
1018
1019 static void
1020 sev_launch_get_measure(Notifier *notifier, void *unused)
1021 {
1022     SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
1023     SevGuestState *sev_guest = SEV_GUEST(sev_common);
1024     int ret, error;
1025     g_autofree guchar *data = NULL;
1026     struct kvm_sev_launch_measure measurement = {};
1027
1028     if (!sev_check_state(sev_common, SEV_STATE_LAUNCH_UPDATE)) {
1029         return;
1030     }
1031
1032     if (sev_es_enabled()) {
1033         /* measure all the VM save areas before getting launch_measure */
1034         ret = sev_launch_update_vmsa(sev_guest);
1035         if (ret) {
1036             exit(1);
1037         }
1038         kvm_mark_guest_state_protected();
1039     }
1040
1041     /* query the measurement blob length */
1042     ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_LAUNCH_MEASURE,
1043                     &measurement, &error);
1044     if (!measurement.len) {
1045         error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'",
1046                      __func__, ret, error, fw_error_to_str(errno));
1047         return;
1048     }
1049
1050     data = g_new0(guchar, measurement.len);
1051     measurement.uaddr = (unsigned long)data;
1052
1053     /* get the measurement blob */
1054     ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_LAUNCH_MEASURE,
1055                     &measurement, &error);
1056     if (ret) {
1057         error_report("%s: LAUNCH_MEASURE ret=%d fw_error=%d '%s'",
1058                      __func__, ret, error, fw_error_to_str(errno));
1059         return;
1060     }
1061
1062     sev_set_guest_state(sev_common, SEV_STATE_LAUNCH_SECRET);
1063
1064     /* encode the measurement value and emit the event */
1065     sev_guest->measurement = g_base64_encode(data, measurement.len);
1066     trace_kvm_sev_launch_measurement(sev_guest->measurement);
1067 }
1068
1069 static char *sev_get_launch_measurement(void)
1070 {
1071     ConfidentialGuestSupport *cgs = MACHINE(qdev_get_machine())->cgs;
1072     SevGuestState *sev_guest =
1073         (SevGuestState *)object_dynamic_cast(OBJECT(cgs), TYPE_SEV_GUEST);
1074
1075     if (sev_guest &&
1076         SEV_COMMON(sev_guest)->state >= SEV_STATE_LAUNCH_SECRET) {
1077         return g_strdup(sev_guest->measurement);
1078     }
1079
1080     return NULL;
1081 }
1082
1083 SevLaunchMeasureInfo *qmp_query_sev_launch_measure(Error **errp)
1084 {
1085     char *data;
1086     SevLaunchMeasureInfo *info;
1087
1088     data = sev_get_launch_measurement();
1089     if (!data) {
1090         error_setg(errp, "SEV launch measurement is not available");
1091         return NULL;
1092     }
1093
1094     info = g_malloc0(sizeof(*info));
1095     info->data = data;
1096
1097     return info;
1098 }
1099
1100 static Notifier sev_machine_done_notify = {
1101     .notify = sev_launch_get_measure,
1102 };
1103
1104 static void
1105 sev_launch_finish(SevCommonState *sev_common)
1106 {
1107     int ret, error;
1108
1109     trace_kvm_sev_launch_finish();
1110     ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_LAUNCH_FINISH, 0,
1111                     &error);
1112     if (ret) {
1113         error_report("%s: LAUNCH_FINISH ret=%d fw_error=%d '%s'",
1114                      __func__, ret, error, fw_error_to_str(error));
1115         exit(1);
1116     }
1117
1118     sev_set_guest_state(sev_common, SEV_STATE_RUNNING);
1119
1120     /* add migration blocker */
1121     error_setg(&sev_mig_blocker,
1122                "SEV: Migration is not implemented");
1123     migrate_add_blocker(&sev_mig_blocker, &error_fatal);
1124 }
1125
1126 static int
1127 snp_launch_update_data(uint64_t gpa, void *hva, size_t len, int type)
1128 {
1129     SevLaunchUpdateData *data;
1130
1131     data = g_new0(SevLaunchUpdateData, 1);
1132     data->gpa = gpa;
1133     data->hva = hva;
1134     data->len = len;
1135     data->type = type;
1136
1137     QTAILQ_INSERT_TAIL(&launch_update, data, next);
1138
1139     return 0;
1140 }
1141
1142 static int
1143 sev_snp_launch_update_data(SevCommonState *sev_common, hwaddr gpa,
1144                            uint8_t *ptr, size_t len)
1145 {
1146        int ret = snp_launch_update_data(gpa, ptr, len,
1147                                          KVM_SEV_SNP_PAGE_TYPE_NORMAL);
1148        return ret;
1149 }
1150
1151 static int
1152 sev_snp_cpuid_info_fill(SnpCpuidInfo *snp_cpuid_info,
1153                         const KvmCpuidInfo *kvm_cpuid_info)
1154 {
1155     size_t i;
1156
1157     if (kvm_cpuid_info->cpuid.nent > SNP_CPUID_FUNCTION_MAXCOUNT) {
1158         error_report("SEV-SNP: CPUID entry count (%d) exceeds max (%d)",
1159                      kvm_cpuid_info->cpuid.nent, SNP_CPUID_FUNCTION_MAXCOUNT);
1160         return -1;
1161     }
1162
1163     memset(snp_cpuid_info, 0, sizeof(*snp_cpuid_info));
1164
1165     for (i = 0; i < kvm_cpuid_info->cpuid.nent; i++) {
1166         const struct kvm_cpuid_entry2 *kvm_cpuid_entry;
1167         SnpCpuidFunc *snp_cpuid_entry;
1168
1169         kvm_cpuid_entry = &kvm_cpuid_info->entries[i];
1170         snp_cpuid_entry = &snp_cpuid_info->entries[i];
1171
1172         snp_cpuid_entry->eax_in = kvm_cpuid_entry->function;
1173         if (kvm_cpuid_entry->flags == KVM_CPUID_FLAG_SIGNIFCANT_INDEX) {
1174             snp_cpuid_entry->ecx_in = kvm_cpuid_entry->index;
1175         }
1176         snp_cpuid_entry->eax = kvm_cpuid_entry->eax;
1177         snp_cpuid_entry->ebx = kvm_cpuid_entry->ebx;
1178         snp_cpuid_entry->ecx = kvm_cpuid_entry->ecx;
1179         snp_cpuid_entry->edx = kvm_cpuid_entry->edx;
1180
1181         /*
1182          * Guest kernels will calculate EBX themselves using the 0xD
1183          * subfunctions corresponding to the individual XSAVE areas, so only
1184          * encode the base XSAVE size in the initial leaves, corresponding
1185          * to the initial XCR0=1 state.
1186          */
1187         if (snp_cpuid_entry->eax_in == 0xD &&
1188             (snp_cpuid_entry->ecx_in == 0x0 || snp_cpuid_entry->ecx_in == 0x1)) {
1189             snp_cpuid_entry->ebx = 0x240;
1190             snp_cpuid_entry->xcr0_in = 1;
1191             snp_cpuid_entry->xss_in = 0;
1192         }
1193     }
1194
1195     snp_cpuid_info->count = i;
1196
1197     return 0;
1198 }
1199
1200 static int
1201 snp_launch_update_cpuid(uint32_t cpuid_addr, void *hva, size_t cpuid_len)
1202 {
1203     KvmCpuidInfo kvm_cpuid_info = {0};
1204     SnpCpuidInfo snp_cpuid_info;
1205     CPUState *cs = first_cpu;
1206     int ret;
1207     uint32_t i = 0;
1208
1209     assert(sizeof(snp_cpuid_info) <= cpuid_len);
1210
1211     /* get the cpuid list from KVM */
1212     do {
1213         kvm_cpuid_info.cpuid.nent = ++i;
1214         ret = kvm_vcpu_ioctl(cs, KVM_GET_CPUID2, &kvm_cpuid_info);
1215     } while (ret == -E2BIG);
1216
1217     if (ret) {
1218         error_report("SEV-SNP: unable to query CPUID values for CPU: '%s'",
1219                      strerror(-ret));
1220         return 1;
1221     }
1222
1223     ret = sev_snp_cpuid_info_fill(&snp_cpuid_info, &kvm_cpuid_info);
1224     if (ret) {
1225         error_report("SEV-SNP: failed to generate CPUID table information");
1226         return 1;
1227     }
1228
1229     memcpy(hva, &snp_cpuid_info, sizeof(snp_cpuid_info));
1230
1231     return snp_launch_update_data(cpuid_addr, hva, cpuid_len,
1232                                   KVM_SEV_SNP_PAGE_TYPE_CPUID);
1233 }
1234
1235 static int
1236 snp_launch_update_kernel_hashes(SevSnpGuestState *sev_snp, uint32_t addr,
1237                                 void *hva, uint32_t len)
1238 {
1239     int type = KVM_SEV_SNP_PAGE_TYPE_ZERO;
1240     if (sev_snp->parent_obj.kernel_hashes) {
1241         assert(sev_snp->kernel_hashes_data);
1242         assert((sev_snp->kernel_hashes_offset +
1243                 sizeof(*sev_snp->kernel_hashes_data)) <= len);
1244         memset(hva, 0, len);
1245         memcpy(hva + sev_snp->kernel_hashes_offset, sev_snp->kernel_hashes_data,
1246                sizeof(*sev_snp->kernel_hashes_data));
1247         type = KVM_SEV_SNP_PAGE_TYPE_NORMAL;
1248     }
1249     return snp_launch_update_data(addr, hva, len, type);
1250 }
1251
1252 static int
1253 snp_metadata_desc_to_page_type(int desc_type)
1254 {
1255     switch (desc_type) {
1256     /* Add the umeasured prevalidated pages as a zero page */
1257     case SEV_DESC_TYPE_SNP_SEC_MEM: return KVM_SEV_SNP_PAGE_TYPE_ZERO;
1258     case SEV_DESC_TYPE_SNP_SECRETS: return KVM_SEV_SNP_PAGE_TYPE_SECRETS;
1259     case SEV_DESC_TYPE_CPUID: return KVM_SEV_SNP_PAGE_TYPE_CPUID;
1260     default:
1261          return KVM_SEV_SNP_PAGE_TYPE_ZERO;
1262     }
1263 }
1264
1265 static void
1266 snp_populate_metadata_pages(SevSnpGuestState *sev_snp,
1267                             OvmfSevMetadata *metadata)
1268 {
1269     OvmfSevMetadataDesc *desc;
1270     int type, ret, i;
1271     void *hva;
1272     MemoryRegion *mr = NULL;
1273
1274     for (i = 0; i < metadata->num_desc; i++) {
1275         desc = &metadata->descs[i];
1276
1277         type = snp_metadata_desc_to_page_type(desc->type);
1278
1279         hva = gpa2hva(&mr, desc->base, desc->len, NULL);
1280         if (!hva) {
1281             error_report("%s: Failed to get HVA for GPA 0x%x sz 0x%x",
1282                          __func__, desc->base, desc->len);
1283             exit(1);
1284         }
1285
1286         if (type == KVM_SEV_SNP_PAGE_TYPE_CPUID) {
1287             ret = snp_launch_update_cpuid(desc->base, hva, desc->len);
1288         } else if (desc->type == SEV_DESC_TYPE_SNP_KERNEL_HASHES) {
1289             ret = snp_launch_update_kernel_hashes(sev_snp, desc->base, hva,
1290                                                   desc->len);
1291         } else {
1292             ret = snp_launch_update_data(desc->base, hva, desc->len, type);
1293         }
1294
1295         if (ret) {
1296             error_report("%s: Failed to add metadata page gpa 0x%x+%x type %d",
1297                          __func__, desc->base, desc->len, desc->type);
1298             exit(1);
1299         }
1300     }
1301 }
1302
1303 static void
1304 sev_snp_launch_finish(SevCommonState *sev_common)
1305 {
1306     int ret, error;
1307     Error *local_err = NULL;
1308     OvmfSevMetadata *metadata;
1309     SevLaunchUpdateData *data;
1310     SevSnpGuestState *sev_snp = SEV_SNP_GUEST(sev_common);
1311     struct kvm_sev_snp_launch_finish *finish = &sev_snp->kvm_finish_conf;
1312
1313     /*
1314      * To boot the SNP guest, the hypervisor is required to populate the CPUID
1315      * and Secrets page before finalizing the launch flow. The location of
1316      * the secrets and CPUID page is available through the OVMF metadata GUID.
1317      */
1318     metadata = pc_system_get_ovmf_sev_metadata_ptr();
1319     if (metadata == NULL) {
1320         error_report("%s: Failed to locate SEV metadata header", __func__);
1321         exit(1);
1322     }
1323
1324     /* Populate all the metadata pages */
1325     snp_populate_metadata_pages(sev_snp, metadata);
1326
1327     QTAILQ_FOREACH(data, &launch_update, next) {
1328         ret = sev_snp_launch_update(sev_snp, data);
1329         if (ret) {
1330             exit(1);
1331         }
1332     }
1333
1334     trace_kvm_sev_snp_launch_finish(sev_snp->id_block_base64, sev_snp->id_auth_base64,
1335                                     sev_snp->host_data);
1336     ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_SNP_LAUNCH_FINISH,
1337                     finish, &error);
1338     if (ret) {
1339         error_report("SNP_LAUNCH_FINISH ret=%d fw_error=%d '%s'",
1340                      ret, error, fw_error_to_str(error));
1341         exit(1);
1342     }
1343
1344     kvm_mark_guest_state_protected();
1345     sev_set_guest_state(sev_common, SEV_STATE_RUNNING);
1346
1347     /* add migration blocker */
1348     error_setg(&sev_mig_blocker,
1349                "SEV-SNP: Migration is not implemented");
1350     ret = migrate_add_blocker(&sev_mig_blocker, &local_err);
1351     if (local_err) {
1352         error_report_err(local_err);
1353         error_free(sev_mig_blocker);
1354         exit(1);
1355     }
1356 }
1357
1358
1359 static void
1360 sev_vm_state_change(void *opaque, bool running, RunState state)
1361 {
1362     SevCommonState *sev_common = opaque;
1363     SevCommonStateClass *klass = SEV_COMMON_GET_CLASS(opaque);
1364
1365     if (running) {
1366         if (!sev_check_state(sev_common, SEV_STATE_RUNNING)) {
1367             klass->launch_finish(sev_common);
1368         }
1369     }
1370 }
1371
1372 /*
1373  * This helper is to examine sev-guest properties and determine if any options
1374  * have been set which rely on the newer KVM_SEV_INIT2 interface and associated
1375  * KVM VM types.
1376  */
1377 static bool sev_init2_required(SevGuestState *sev_guest)
1378 {
1379     /* Currently no KVM_SEV_INIT2-specific options are exposed via QEMU */
1380     return false;
1381 }
1382
1383 static int sev_kvm_type(X86ConfidentialGuest *cg)
1384 {
1385     SevCommonState *sev_common = SEV_COMMON(cg);
1386     SevGuestState *sev_guest = SEV_GUEST(sev_common);
1387     int kvm_type;
1388
1389     if (sev_common->kvm_type != -1) {
1390         goto out;
1391     }
1392
1393     /* These are the only cases where legacy VM types can be used. */
1394     if (sev_guest->legacy_vm_type == ON_OFF_AUTO_ON ||
1395         (sev_guest->legacy_vm_type == ON_OFF_AUTO_AUTO &&
1396          !sev_init2_required(sev_guest))) {
1397         sev_common->kvm_type = KVM_X86_DEFAULT_VM;
1398         goto out;
1399     }
1400
1401     /*
1402      * Newer VM types are required, either explicitly via legacy-vm-type=on, or
1403      * implicitly via legacy-vm-type=auto along with additional sev-guest
1404      * properties that require the newer VM types.
1405      */
1406     kvm_type = (sev_guest->policy & SEV_POLICY_ES) ?
1407                 KVM_X86_SEV_ES_VM : KVM_X86_SEV_VM;
1408     if (!kvm_is_vm_type_supported(kvm_type)) {
1409         if (sev_guest->legacy_vm_type == ON_OFF_AUTO_AUTO) {
1410             error_report("SEV: host kernel does not support requested %s VM type, which is required "
1411                          "for the set of options specified. To allow use of the legacy "
1412                          "KVM_X86_DEFAULT_VM VM type, please disable any options that are not "
1413                          "compatible with the legacy VM type, or upgrade your kernel.",
1414                          kvm_type == KVM_X86_SEV_VM ? "KVM_X86_SEV_VM" : "KVM_X86_SEV_ES_VM");
1415         } else {
1416             error_report("SEV: host kernel does not support requested %s VM type. To allow use of "
1417                          "the legacy KVM_X86_DEFAULT_VM VM type, the 'legacy-vm-type' argument "
1418                          "must be set to 'on' or 'auto' for the sev-guest object.",
1419                          kvm_type == KVM_X86_SEV_VM ? "KVM_X86_SEV_VM" : "KVM_X86_SEV_ES_VM");
1420         }
1421
1422         return -1;
1423     }
1424
1425     sev_common->kvm_type = kvm_type;
1426 out:
1427     return sev_common->kvm_type;
1428 }
1429
1430 static int sev_snp_kvm_type(X86ConfidentialGuest *cg)
1431 {
1432     return KVM_X86_SNP_VM;
1433 }
1434
1435 static int sev_common_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
1436 {
1437     char *devname;
1438     int ret, fw_error, cmd;
1439     uint32_t ebx;
1440     uint32_t host_cbitpos;
1441     struct sev_user_data_status status = {};
1442     SevCommonState *sev_common = SEV_COMMON(cgs);
1443     SevCommonStateClass *klass = SEV_COMMON_GET_CLASS(cgs);
1444     X86ConfidentialGuestClass *x86_klass =
1445                                X86_CONFIDENTIAL_GUEST_GET_CLASS(cgs);
1446
1447     sev_common->state = SEV_STATE_UNINIT;
1448
1449     host_cpuid(0x8000001F, 0, NULL, &ebx, NULL, NULL);
1450     host_cbitpos = ebx & 0x3f;
1451
1452     /*
1453      * The cbitpos value will be placed in bit positions 5:0 of the EBX
1454      * register of CPUID 0x8000001F. No need to verify the range as the
1455      * comparison against the host value accomplishes that.
1456      */
1457     if (host_cbitpos != sev_common->cbitpos) {
1458         error_setg(errp, "%s: cbitpos check failed, host '%d' requested '%d'",
1459                    __func__, host_cbitpos, sev_common->cbitpos);
1460         return -1;
1461     }
1462
1463     /*
1464      * The reduced-phys-bits value will be placed in bit positions 11:6 of
1465      * the EBX register of CPUID 0x8000001F, so verify the supplied value
1466      * is in the range of 1 to 63.
1467      */
1468     if (sev_common->reduced_phys_bits < 1 ||
1469         sev_common->reduced_phys_bits > 63) {
1470         error_setg(errp, "%s: reduced_phys_bits check failed,"
1471                    " it should be in the range of 1 to 63, requested '%d'",
1472                    __func__, sev_common->reduced_phys_bits);
1473         return -1;
1474     }
1475
1476     devname = object_property_get_str(OBJECT(sev_common), "sev-device", NULL);
1477     sev_common->sev_fd = open(devname, O_RDWR);
1478     if (sev_common->sev_fd < 0) {
1479         error_setg(errp, "%s: Failed to open %s '%s'", __func__,
1480                    devname, strerror(errno));
1481         g_free(devname);
1482         return -1;
1483     }
1484     g_free(devname);
1485
1486     ret = sev_platform_ioctl(sev_common->sev_fd, SEV_PLATFORM_STATUS, &status,
1487                              &fw_error);
1488     if (ret) {
1489         error_setg(errp, "%s: failed to get platform status ret=%d "
1490                    "fw_error='%d: %s'", __func__, ret, fw_error,
1491                    fw_error_to_str(fw_error));
1492         return -1;
1493     }
1494     sev_common->build_id = status.build;
1495     sev_common->api_major = status.api_major;
1496     sev_common->api_minor = status.api_minor;
1497
1498     if (sev_es_enabled()) {
1499         if (!kvm_kernel_irqchip_allowed()) {
1500             error_setg(errp, "%s: SEV-ES guests require in-kernel irqchip"
1501                        "support", __func__);
1502             return -1;
1503         }
1504     }
1505
1506     if (sev_es_enabled() && !sev_snp_enabled()) {
1507         if (!(status.flags & SEV_STATUS_FLAGS_CONFIG_ES)) {
1508             error_setg(errp, "%s: guest policy requires SEV-ES, but "
1509                          "host SEV-ES support unavailable",
1510                          __func__);
1511             return -1;
1512         }
1513     }
1514
1515     trace_kvm_sev_init();
1516     switch (x86_klass->kvm_type(X86_CONFIDENTIAL_GUEST(sev_common))) {
1517     case KVM_X86_DEFAULT_VM:
1518         cmd = sev_es_enabled() ? KVM_SEV_ES_INIT : KVM_SEV_INIT;
1519
1520         ret = sev_ioctl(sev_common->sev_fd, cmd, NULL, &fw_error);
1521         break;
1522     case KVM_X86_SEV_VM:
1523     case KVM_X86_SEV_ES_VM:
1524     case KVM_X86_SNP_VM: {
1525         struct kvm_sev_init args = { 0 };
1526
1527         ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_INIT2, &args, &fw_error);
1528         break;
1529     }
1530     default:
1531         error_setg(errp, "%s: host kernel does not support the requested SEV configuration.",
1532                    __func__);
1533         return -1;
1534     }
1535
1536     if (ret) {
1537         error_setg(errp, "%s: failed to initialize ret=%d fw_error=%d '%s'",
1538                    __func__, ret, fw_error, fw_error_to_str(fw_error));
1539         return -1;
1540     }
1541
1542     ret = klass->launch_start(sev_common);
1543
1544     if (ret) {
1545         error_setg(errp, "%s: failed to create encryption context", __func__);
1546         return -1;
1547     }
1548
1549     if (klass->kvm_init && klass->kvm_init(cgs, errp)) {
1550         return -1;
1551     }
1552
1553     qemu_add_vm_change_state_handler(sev_vm_state_change, sev_common);
1554
1555     cgs->ready = true;
1556
1557     return 0;
1558 }
1559
1560 static int sev_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
1561 {
1562      int ret;
1563
1564     /*
1565      * SEV/SEV-ES rely on pinned memory to back guest RAM so discarding
1566      * isn't actually possible. With SNP, only guest_memfd pages are used
1567      * for private guest memory, so discarding of shared memory is still
1568      * possible..
1569      */
1570     ret = ram_block_discard_disable(true);
1571     if (ret) {
1572         error_setg(errp, "%s: cannot disable RAM discard", __func__);
1573         return -1;
1574     }
1575
1576     /*
1577      * SEV uses these notifiers to register/pin pages prior to guest use,
1578      * but SNP relies on guest_memfd for private pages, which has its
1579      * own internal mechanisms for registering/pinning private memory.
1580      */
1581     ram_block_notifier_add(&sev_ram_notifier);
1582
1583     /*
1584      * The machine done notify event is used for SEV guests to get the
1585      * measurement of the encrypted images. When SEV-SNP is enabled, the
1586      * measurement is part of the guest attestation process where it can
1587      * be collected without any reliance on the VMM. So skip registering
1588      * the notifier for SNP in favor of using guest attestation instead.
1589      */
1590     qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
1591
1592     return 0;
1593 }
1594
1595 static int sev_snp_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
1596 {
1597     MachineState *ms = MACHINE(qdev_get_machine());
1598     X86MachineState *x86ms = X86_MACHINE(ms);
1599
1600     if (x86ms->smm == ON_OFF_AUTO_AUTO) {
1601         x86ms->smm = ON_OFF_AUTO_OFF;
1602     } else if (x86ms->smm == ON_OFF_AUTO_ON) {
1603         error_setg(errp, "SEV-SNP does not support SMM.");
1604         return -1;
1605     }
1606
1607     return 0;
1608 }
1609
1610 int
1611 sev_encrypt_flash(hwaddr gpa, uint8_t *ptr, uint64_t len, Error **errp)
1612 {
1613     SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
1614     SevCommonStateClass *klass;
1615
1616     if (!sev_common) {
1617         return 0;
1618     }
1619     klass = SEV_COMMON_GET_CLASS(sev_common);
1620
1621     /* if SEV is in update state then encrypt the data else do nothing */
1622     if (sev_check_state(sev_common, SEV_STATE_LAUNCH_UPDATE)) {
1623         int ret;
1624
1625         ret = klass->launch_update_data(sev_common, gpa, ptr, len);
1626         if (ret < 0) {
1627             error_setg(errp, "SEV: Failed to encrypt pflash rom");
1628             return ret;
1629         }
1630     }
1631
1632     return 0;
1633 }
1634
1635 int sev_inject_launch_secret(const char *packet_hdr, const char *secret,
1636                              uint64_t gpa, Error **errp)
1637 {
1638     ERRP_GUARD();
1639     struct kvm_sev_launch_secret input;
1640     g_autofree guchar *data = NULL, *hdr = NULL;
1641     int error, ret = 1;
1642     void *hva;
1643     gsize hdr_sz = 0, data_sz = 0;
1644     MemoryRegion *mr = NULL;
1645     SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
1646
1647     if (!sev_common) {
1648         error_setg(errp, "SEV not enabled for guest");
1649         return 1;
1650     }
1651
1652     /* secret can be injected only in this state */
1653     if (!sev_check_state(sev_common, SEV_STATE_LAUNCH_SECRET)) {
1654         error_setg(errp, "SEV: Not in correct state. (LSECRET) %x",
1655                    sev_common->state);
1656         return 1;
1657     }
1658
1659     hdr = g_base64_decode(packet_hdr, &hdr_sz);
1660     if (!hdr || !hdr_sz) {
1661         error_setg(errp, "SEV: Failed to decode sequence header");
1662         return 1;
1663     }
1664
1665     data = g_base64_decode(secret, &data_sz);
1666     if (!data || !data_sz) {
1667         error_setg(errp, "SEV: Failed to decode data");
1668         return 1;
1669     }
1670
1671     hva = gpa2hva(&mr, gpa, data_sz, errp);
1672     if (!hva) {
1673         error_prepend(errp, "SEV: Failed to calculate guest address: ");
1674         return 1;
1675     }
1676
1677     input.hdr_uaddr = (uint64_t)(unsigned long)hdr;
1678     input.hdr_len = hdr_sz;
1679
1680     input.trans_uaddr = (uint64_t)(unsigned long)data;
1681     input.trans_len = data_sz;
1682
1683     input.guest_uaddr = (uint64_t)(unsigned long)hva;
1684     input.guest_len = data_sz;
1685
1686     trace_kvm_sev_launch_secret(gpa, input.guest_uaddr,
1687                                 input.trans_uaddr, input.trans_len);
1688
1689     ret = sev_ioctl(sev_common->sev_fd, KVM_SEV_LAUNCH_SECRET,
1690                     &input, &error);
1691     if (ret) {
1692         error_setg(errp, "SEV: failed to inject secret ret=%d fw_error=%d '%s'",
1693                      ret, error, fw_error_to_str(error));
1694         return ret;
1695     }
1696
1697     return 0;
1698 }
1699
1700 #define SEV_SECRET_GUID "4c2eb361-7d9b-4cc3-8081-127c90d3d294"
1701 struct sev_secret_area {
1702     uint32_t base;
1703     uint32_t size;
1704 };
1705
1706 void qmp_sev_inject_launch_secret(const char *packet_hdr,
1707                                   const char *secret,
1708                                   bool has_gpa, uint64_t gpa,
1709                                   Error **errp)
1710 {
1711     if (!sev_enabled()) {
1712         error_setg(errp, "SEV not enabled for guest");
1713         return;
1714     }
1715     if (!has_gpa) {
1716         uint8_t *data;
1717         struct sev_secret_area *area;
1718
1719         if (!pc_system_ovmf_table_find(SEV_SECRET_GUID, &data, NULL)) {
1720             error_setg(errp, "SEV: no secret area found in OVMF,"
1721                        " gpa must be specified.");
1722             return;
1723         }
1724         area = (struct sev_secret_area *)data;
1725         gpa = area->base;
1726     }
1727
1728     sev_inject_launch_secret(packet_hdr, secret, gpa, errp);
1729 }
1730
1731 static int
1732 sev_es_parse_reset_block(SevInfoBlock *info, uint32_t *addr)
1733 {
1734     if (!info->reset_addr) {
1735         error_report("SEV-ES reset address is zero");
1736         return 1;
1737     }
1738
1739     *addr = info->reset_addr;
1740
1741     return 0;
1742 }
1743
1744 static int
1745 sev_es_find_reset_vector(void *flash_ptr, uint64_t flash_size,
1746                          uint32_t *addr)
1747 {
1748     QemuUUID info_guid, *guid;
1749     SevInfoBlock *info;
1750     uint8_t *data;
1751     uint16_t *len;
1752
1753     /*
1754      * Initialize the address to zero. An address of zero with a successful
1755      * return code indicates that SEV-ES is not active.
1756      */
1757     *addr = 0;
1758
1759     /*
1760      * Extract the AP reset vector for SEV-ES guests by locating the SEV GUID.
1761      * The SEV GUID is located on its own (original implementation) or within
1762      * the Firmware GUID Table (new implementation), either of which are
1763      * located 32 bytes from the end of the flash.
1764      *
1765      * Check the Firmware GUID Table first.
1766      */
1767     if (pc_system_ovmf_table_find(SEV_INFO_BLOCK_GUID, &data, NULL)) {
1768         return sev_es_parse_reset_block((SevInfoBlock *)data, addr);
1769     }
1770
1771     /*
1772      * SEV info block not found in the Firmware GUID Table (or there isn't
1773      * a Firmware GUID Table), fall back to the original implementation.
1774      */
1775     data = flash_ptr + flash_size - 0x20;
1776
1777     qemu_uuid_parse(SEV_INFO_BLOCK_GUID, &info_guid);
1778     info_guid = qemu_uuid_bswap(info_guid); /* GUIDs are LE */
1779
1780     guid = (QemuUUID *)(data - sizeof(info_guid));
1781     if (!qemu_uuid_is_equal(guid, &info_guid)) {
1782         error_report("SEV information block/Firmware GUID Table block not found in pflash rom");
1783         return 1;
1784     }
1785
1786     len = (uint16_t *)((uint8_t *)guid - sizeof(*len));
1787     info = (SevInfoBlock *)(data - le16_to_cpu(*len));
1788
1789     return sev_es_parse_reset_block(info, addr);
1790 }
1791
1792 void sev_es_set_reset_vector(CPUState *cpu)
1793 {
1794     X86CPU *x86;
1795     CPUX86State *env;
1796     ConfidentialGuestSupport *cgs = MACHINE(qdev_get_machine())->cgs;
1797     SevCommonState *sev_common = SEV_COMMON(
1798         object_dynamic_cast(OBJECT(cgs), TYPE_SEV_COMMON));
1799
1800     /* Only update if we have valid reset information */
1801     if (!sev_common || !sev_common->reset_data_valid) {
1802         return;
1803     }
1804
1805     /* Do not update the BSP reset state */
1806     if (cpu->cpu_index == 0) {
1807         return;
1808     }
1809
1810     x86 = X86_CPU(cpu);
1811     env = &x86->env;
1812
1813     cpu_x86_load_seg_cache(env, R_CS, 0xf000, sev_common->reset_cs, 0xffff,
1814                            DESC_P_MASK | DESC_S_MASK | DESC_CS_MASK |
1815                            DESC_R_MASK | DESC_A_MASK);
1816
1817     env->eip = sev_common->reset_ip;
1818 }
1819
1820 int sev_es_save_reset_vector(void *flash_ptr, uint64_t flash_size)
1821 {
1822     CPUState *cpu;
1823     uint32_t addr;
1824     int ret;
1825     SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
1826
1827     if (!sev_es_enabled()) {
1828         return 0;
1829     }
1830
1831     addr = 0;
1832     ret = sev_es_find_reset_vector(flash_ptr, flash_size,
1833                                    &addr);
1834     if (ret) {
1835         return ret;
1836     }
1837
1838     if (addr) {
1839         sev_common->reset_cs = addr & 0xffff0000;
1840         sev_common->reset_ip = addr & 0x0000ffff;
1841         sev_common->reset_data_valid = true;
1842
1843         CPU_FOREACH(cpu) {
1844             sev_es_set_reset_vector(cpu);
1845         }
1846     }
1847
1848     return 0;
1849 }
1850
1851 static const QemuUUID sev_hash_table_header_guid = {
1852     .data = UUID_LE(0x9438d606, 0x4f22, 0x4cc9, 0xb4, 0x79, 0xa7, 0x93,
1853                     0xd4, 0x11, 0xfd, 0x21)
1854 };
1855
1856 static const QemuUUID sev_kernel_entry_guid = {
1857     .data = UUID_LE(0x4de79437, 0xabd2, 0x427f, 0xb8, 0x35, 0xd5, 0xb1,
1858                     0x72, 0xd2, 0x04, 0x5b)
1859 };
1860 static const QemuUUID sev_initrd_entry_guid = {
1861     .data = UUID_LE(0x44baf731, 0x3a2f, 0x4bd7, 0x9a, 0xf1, 0x41, 0xe2,
1862                     0x91, 0x69, 0x78, 0x1d)
1863 };
1864 static const QemuUUID sev_cmdline_entry_guid = {
1865     .data = UUID_LE(0x97d02dd8, 0xbd20, 0x4c94, 0xaa, 0x78, 0xe7, 0x71,
1866                     0x4d, 0x36, 0xab, 0x2a)
1867 };
1868
1869 static bool build_kernel_loader_hashes(PaddedSevHashTable *padded_ht,
1870                                        SevKernelLoaderContext *ctx,
1871                                        Error **errp)
1872 {
1873     SevHashTable *ht;
1874     uint8_t cmdline_hash[HASH_SIZE];
1875     uint8_t initrd_hash[HASH_SIZE];
1876     uint8_t kernel_hash[HASH_SIZE];
1877     uint8_t *hashp;
1878     size_t hash_len = HASH_SIZE;
1879
1880     /*
1881      * Calculate hash of kernel command-line with the terminating null byte. If
1882      * the user doesn't supply a command-line via -append, the 1-byte "\0" will
1883      * be used.
1884      */
1885     hashp = cmdline_hash;
1886     if (qcrypto_hash_bytes(QCRYPTO_HASH_ALGO_SHA256, ctx->cmdline_data,
1887                            ctx->cmdline_size, &hashp, &hash_len, errp) < 0) {
1888         return false;
1889     }
1890     assert(hash_len == HASH_SIZE);
1891
1892     /*
1893      * Calculate hash of initrd. If the user doesn't supply an initrd via
1894      * -initrd, an empty buffer will be used (ctx->initrd_size == 0).
1895      */
1896     hashp = initrd_hash;
1897     if (qcrypto_hash_bytes(QCRYPTO_HASH_ALGO_SHA256, ctx->initrd_data,
1898                            ctx->initrd_size, &hashp, &hash_len, errp) < 0) {
1899         return false;
1900     }
1901     assert(hash_len == HASH_SIZE);
1902
1903     /* Calculate hash of the kernel */
1904     hashp = kernel_hash;
1905     struct iovec iov[2] = {
1906         { .iov_base = ctx->setup_data, .iov_len = ctx->setup_size },
1907         { .iov_base = ctx->kernel_data, .iov_len = ctx->kernel_size }
1908     };
1909     if (qcrypto_hash_bytesv(QCRYPTO_HASH_ALGO_SHA256, iov, ARRAY_SIZE(iov),
1910                             &hashp, &hash_len, errp) < 0) {
1911         return false;
1912     }
1913     assert(hash_len == HASH_SIZE);
1914
1915     ht = &padded_ht->ht;
1916
1917     ht->guid = sev_hash_table_header_guid;
1918     ht->len = sizeof(*ht);
1919
1920     ht->cmdline.guid = sev_cmdline_entry_guid;
1921     ht->cmdline.len = sizeof(ht->cmdline);
1922     memcpy(ht->cmdline.hash, cmdline_hash, sizeof(ht->cmdline.hash));
1923
1924     ht->initrd.guid = sev_initrd_entry_guid;
1925     ht->initrd.len = sizeof(ht->initrd);
1926     memcpy(ht->initrd.hash, initrd_hash, sizeof(ht->initrd.hash));
1927
1928     ht->kernel.guid = sev_kernel_entry_guid;
1929     ht->kernel.len = sizeof(ht->kernel);
1930     memcpy(ht->kernel.hash, kernel_hash, sizeof(ht->kernel.hash));
1931
1932     /* zero the excess data so the measurement can be reliably calculated */
1933     memset(padded_ht->padding, 0, sizeof(padded_ht->padding));
1934
1935     return true;
1936 }
1937
1938 static bool sev_snp_build_kernel_loader_hashes(SevCommonState *sev_common,
1939                                                SevHashTableDescriptor *area,
1940                                                SevKernelLoaderContext *ctx,
1941                                                Error **errp)
1942 {
1943     /*
1944      * SNP: Populate the hashes table in an area that later in
1945      * snp_launch_update_kernel_hashes() will be copied to the guest memory
1946      * and encrypted.
1947      */
1948     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(sev_common);
1949     sev_snp_guest->kernel_hashes_offset = area->base & ~TARGET_PAGE_MASK;
1950     sev_snp_guest->kernel_hashes_data = g_new0(PaddedSevHashTable, 1);
1951     return build_kernel_loader_hashes(sev_snp_guest->kernel_hashes_data, ctx, errp);
1952 }
1953
1954 static bool sev_build_kernel_loader_hashes(SevCommonState *sev_common,
1955                                            SevHashTableDescriptor *area,
1956                                            SevKernelLoaderContext *ctx,
1957                                            Error **errp)
1958 {
1959     PaddedSevHashTable *padded_ht;
1960     hwaddr mapped_len = sizeof(*padded_ht);
1961     MemTxAttrs attrs = { 0 };
1962     bool ret = true;
1963
1964     /*
1965      * Populate the hashes table in the guest's memory at the OVMF-designated
1966      * area for the SEV hashes table
1967      */
1968     padded_ht = address_space_map(&address_space_memory, area->base,
1969                                   &mapped_len, true, attrs);
1970     if (!padded_ht || mapped_len != sizeof(*padded_ht)) {
1971         error_setg(errp, "SEV: cannot map hashes table guest memory area");
1972         return false;
1973     }
1974
1975     if (build_kernel_loader_hashes(padded_ht, ctx, errp)) {
1976         if (sev_encrypt_flash(area->base, (uint8_t *)padded_ht,
1977                               sizeof(*padded_ht), errp) < 0) {
1978             ret = false;
1979         }
1980     } else {
1981         ret = false;
1982     }
1983
1984     address_space_unmap(&address_space_memory, padded_ht,
1985                         mapped_len, true, mapped_len);
1986
1987     return ret;
1988 }
1989
1990 /*
1991  * Add the hashes of the linux kernel/initrd/cmdline to an encrypted guest page
1992  * which is included in SEV's initial memory measurement.
1993  */
1994 bool sev_add_kernel_loader_hashes(SevKernelLoaderContext *ctx, Error **errp)
1995 {
1996     uint8_t *data;
1997     SevHashTableDescriptor *area;
1998     SevCommonState *sev_common = SEV_COMMON(MACHINE(qdev_get_machine())->cgs);
1999     SevCommonStateClass *klass = SEV_COMMON_GET_CLASS(sev_common);
2000
2001     /*
2002      * Only add the kernel hashes if the sev-guest configuration explicitly
2003      * stated kernel-hashes=on.
2004      */
2005     if (!sev_common->kernel_hashes) {
2006         return false;
2007     }
2008
2009     if (!pc_system_ovmf_table_find(SEV_HASH_TABLE_RV_GUID, &data, NULL)) {
2010         error_setg(errp, "SEV: kernel specified but guest firmware "
2011                          "has no hashes table GUID");
2012         return false;
2013     }
2014
2015     area = (SevHashTableDescriptor *)data;
2016     if (!area->base || area->size < sizeof(PaddedSevHashTable)) {
2017         error_setg(errp, "SEV: guest firmware hashes table area is invalid "
2018                          "(base=0x%x size=0x%x)", area->base, area->size);
2019         return false;
2020     }
2021
2022     return klass->build_kernel_loader_hashes(sev_common, area, ctx, errp);
2023 }
2024
2025 static char *
2026 sev_common_get_sev_device(Object *obj, Error **errp)
2027 {
2028     return g_strdup(SEV_COMMON(obj)->sev_device);
2029 }
2030
2031 static void
2032 sev_common_set_sev_device(Object *obj, const char *value, Error **errp)
2033 {
2034     SEV_COMMON(obj)->sev_device = g_strdup(value);
2035 }
2036
2037 static bool sev_common_get_kernel_hashes(Object *obj, Error **errp)
2038 {
2039     return SEV_COMMON(obj)->kernel_hashes;
2040 }
2041
2042 static void sev_common_set_kernel_hashes(Object *obj, bool value, Error **errp)
2043 {
2044     SEV_COMMON(obj)->kernel_hashes = value;
2045 }
2046
2047 static void
2048 sev_common_class_init(ObjectClass *oc, void *data)
2049 {
2050     ConfidentialGuestSupportClass *klass = CONFIDENTIAL_GUEST_SUPPORT_CLASS(oc);
2051
2052     klass->kvm_init = sev_common_kvm_init;
2053
2054     object_class_property_add_str(oc, "sev-device",
2055                                   sev_common_get_sev_device,
2056                                   sev_common_set_sev_device);
2057     object_class_property_set_description(oc, "sev-device",
2058             "SEV device to use");
2059     object_class_property_add_bool(oc, "kernel-hashes",
2060                                    sev_common_get_kernel_hashes,
2061                                    sev_common_set_kernel_hashes);
2062     object_class_property_set_description(oc, "kernel-hashes",
2063             "add kernel hashes to guest firmware for measured Linux boot");
2064 }
2065
2066 static void
2067 sev_common_instance_init(Object *obj)
2068 {
2069     SevCommonState *sev_common = SEV_COMMON(obj);
2070
2071     sev_common->kvm_type = -1;
2072
2073     sev_common->sev_device = g_strdup(DEFAULT_SEV_DEVICE);
2074
2075     object_property_add_uint32_ptr(obj, "cbitpos", &sev_common->cbitpos,
2076                                    OBJ_PROP_FLAG_READWRITE);
2077     object_property_add_uint32_ptr(obj, "reduced-phys-bits",
2078                                    &sev_common->reduced_phys_bits,
2079                                    OBJ_PROP_FLAG_READWRITE);
2080 }
2081
2082 /* sev guest info common to sev/sev-es/sev-snp */
2083 static const TypeInfo sev_common_info = {
2084     .parent = TYPE_X86_CONFIDENTIAL_GUEST,
2085     .name = TYPE_SEV_COMMON,
2086     .instance_size = sizeof(SevCommonState),
2087     .instance_init = sev_common_instance_init,
2088     .class_size = sizeof(SevCommonStateClass),
2089     .class_init = sev_common_class_init,
2090     .abstract = true,
2091     .interfaces = (InterfaceInfo[]) {
2092         { TYPE_USER_CREATABLE },
2093         { }
2094     }
2095 };
2096
2097 static char *
2098 sev_guest_get_dh_cert_file(Object *obj, Error **errp)
2099 {
2100     return g_strdup(SEV_GUEST(obj)->dh_cert_file);
2101 }
2102
2103 static void
2104 sev_guest_set_dh_cert_file(Object *obj, const char *value, Error **errp)
2105 {
2106     SEV_GUEST(obj)->dh_cert_file = g_strdup(value);
2107 }
2108
2109 static char *
2110 sev_guest_get_session_file(Object *obj, Error **errp)
2111 {
2112     SevGuestState *sev_guest = SEV_GUEST(obj);
2113
2114     return sev_guest->session_file ? g_strdup(sev_guest->session_file) : NULL;
2115 }
2116
2117 static void
2118 sev_guest_set_session_file(Object *obj, const char *value, Error **errp)
2119 {
2120     SEV_GUEST(obj)->session_file = g_strdup(value);
2121 }
2122
2123 static void sev_guest_get_legacy_vm_type(Object *obj, Visitor *v,
2124                                          const char *name, void *opaque,
2125                                          Error **errp)
2126 {
2127     SevGuestState *sev_guest = SEV_GUEST(obj);
2128     OnOffAuto legacy_vm_type = sev_guest->legacy_vm_type;
2129
2130     visit_type_OnOffAuto(v, name, &legacy_vm_type, errp);
2131 }
2132
2133 static void sev_guest_set_legacy_vm_type(Object *obj, Visitor *v,
2134                                          const char *name, void *opaque,
2135                                          Error **errp)
2136 {
2137     SevGuestState *sev_guest = SEV_GUEST(obj);
2138
2139     visit_type_OnOffAuto(v, name, &sev_guest->legacy_vm_type, errp);
2140 }
2141
2142 static void
2143 sev_guest_class_init(ObjectClass *oc, void *data)
2144 {
2145     SevCommonStateClass *klass = SEV_COMMON_CLASS(oc);
2146     X86ConfidentialGuestClass *x86_klass = X86_CONFIDENTIAL_GUEST_CLASS(oc);
2147
2148     klass->build_kernel_loader_hashes = sev_build_kernel_loader_hashes;
2149     klass->launch_start = sev_launch_start;
2150     klass->launch_finish = sev_launch_finish;
2151     klass->launch_update_data = sev_launch_update_data;
2152     klass->kvm_init = sev_kvm_init;
2153     x86_klass->kvm_type = sev_kvm_type;
2154
2155     object_class_property_add_str(oc, "dh-cert-file",
2156                                   sev_guest_get_dh_cert_file,
2157                                   sev_guest_set_dh_cert_file);
2158     object_class_property_set_description(oc, "dh-cert-file",
2159             "guest owners DH certificate (encoded with base64)");
2160     object_class_property_add_str(oc, "session-file",
2161                                   sev_guest_get_session_file,
2162                                   sev_guest_set_session_file);
2163     object_class_property_set_description(oc, "session-file",
2164             "guest owners session parameters (encoded with base64)");
2165     object_class_property_add(oc, "legacy-vm-type", "OnOffAuto",
2166                               sev_guest_get_legacy_vm_type,
2167                               sev_guest_set_legacy_vm_type, NULL, NULL);
2168     object_class_property_set_description(oc, "legacy-vm-type",
2169             "use legacy VM type to maintain measurement compatibility with older QEMU or kernel versions.");
2170 }
2171
2172 static void
2173 sev_guest_instance_init(Object *obj)
2174 {
2175     SevGuestState *sev_guest = SEV_GUEST(obj);
2176
2177     sev_guest->policy = DEFAULT_GUEST_POLICY;
2178     object_property_add_uint32_ptr(obj, "handle", &sev_guest->handle,
2179                                    OBJ_PROP_FLAG_READWRITE);
2180     object_property_add_uint32_ptr(obj, "policy", &sev_guest->policy,
2181                                    OBJ_PROP_FLAG_READWRITE);
2182     object_apply_compat_props(obj);
2183
2184     sev_guest->legacy_vm_type = ON_OFF_AUTO_AUTO;
2185 }
2186
2187 /* guest info specific sev/sev-es */
2188 static const TypeInfo sev_guest_info = {
2189     .parent = TYPE_SEV_COMMON,
2190     .name = TYPE_SEV_GUEST,
2191     .instance_size = sizeof(SevGuestState),
2192     .instance_init = sev_guest_instance_init,
2193     .class_init = sev_guest_class_init,
2194 };
2195
2196 static void
2197 sev_snp_guest_get_policy(Object *obj, Visitor *v, const char *name,
2198                          void *opaque, Error **errp)
2199 {
2200     visit_type_uint64(v, name,
2201                       (uint64_t *)&SEV_SNP_GUEST(obj)->kvm_start_conf.policy,
2202                       errp);
2203 }
2204
2205 static void
2206 sev_snp_guest_set_policy(Object *obj, Visitor *v, const char *name,
2207                          void *opaque, Error **errp)
2208 {
2209     visit_type_uint64(v, name,
2210                       (uint64_t *)&SEV_SNP_GUEST(obj)->kvm_start_conf.policy,
2211                       errp);
2212 }
2213
2214 static char *
2215 sev_snp_guest_get_guest_visible_workarounds(Object *obj, Error **errp)
2216 {
2217     return g_strdup(SEV_SNP_GUEST(obj)->guest_visible_workarounds);
2218 }
2219
2220 static void
2221 sev_snp_guest_set_guest_visible_workarounds(Object *obj, const char *value,
2222                                             Error **errp)
2223 {
2224     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2225     struct kvm_sev_snp_launch_start *start = &sev_snp_guest->kvm_start_conf;
2226     g_autofree guchar *blob;
2227     gsize len;
2228
2229     g_free(sev_snp_guest->guest_visible_workarounds);
2230
2231     /* store the base64 str so we don't need to re-encode in getter */
2232     sev_snp_guest->guest_visible_workarounds = g_strdup(value);
2233
2234     blob = qbase64_decode(sev_snp_guest->guest_visible_workarounds,
2235                           -1, &len, errp);
2236     if (!blob) {
2237         return;
2238     }
2239
2240     if (len != sizeof(start->gosvw)) {
2241         error_setg(errp, "parameter length of %" G_GSIZE_FORMAT
2242                    " exceeds max of %zu",
2243                    len, sizeof(start->gosvw));
2244         return;
2245     }
2246
2247     memcpy(start->gosvw, blob, len);
2248 }
2249
2250 static char *
2251 sev_snp_guest_get_id_block(Object *obj, Error **errp)
2252 {
2253     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2254
2255     return g_strdup(sev_snp_guest->id_block_base64);
2256 }
2257
2258 static void
2259 sev_snp_guest_set_id_block(Object *obj, const char *value, Error **errp)
2260 {
2261     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2262     struct kvm_sev_snp_launch_finish *finish = &sev_snp_guest->kvm_finish_conf;
2263     gsize len;
2264
2265     finish->id_block_en = 0;
2266     g_free(sev_snp_guest->id_block);
2267     g_free(sev_snp_guest->id_block_base64);
2268
2269     /* store the base64 str so we don't need to re-encode in getter */
2270     sev_snp_guest->id_block_base64 = g_strdup(value);
2271     sev_snp_guest->id_block =
2272         qbase64_decode(sev_snp_guest->id_block_base64, -1, &len, errp);
2273
2274     if (!sev_snp_guest->id_block) {
2275         return;
2276     }
2277
2278     if (len != KVM_SEV_SNP_ID_BLOCK_SIZE) {
2279         error_setg(errp, "parameter length of %" G_GSIZE_FORMAT
2280                    " not equal to %u",
2281                    len, KVM_SEV_SNP_ID_BLOCK_SIZE);
2282         return;
2283     }
2284
2285     finish->id_block_en = 1;
2286     finish->id_block_uaddr = (uintptr_t)sev_snp_guest->id_block;
2287 }
2288
2289 static char *
2290 sev_snp_guest_get_id_auth(Object *obj, Error **errp)
2291 {
2292     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2293
2294     return g_strdup(sev_snp_guest->id_auth_base64);
2295 }
2296
2297 static void
2298 sev_snp_guest_set_id_auth(Object *obj, const char *value, Error **errp)
2299 {
2300     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2301     struct kvm_sev_snp_launch_finish *finish = &sev_snp_guest->kvm_finish_conf;
2302     gsize len;
2303
2304     finish->id_auth_uaddr = 0;
2305     g_free(sev_snp_guest->id_auth);
2306     g_free(sev_snp_guest->id_auth_base64);
2307
2308     /* store the base64 str so we don't need to re-encode in getter */
2309     sev_snp_guest->id_auth_base64 = g_strdup(value);
2310     sev_snp_guest->id_auth =
2311         qbase64_decode(sev_snp_guest->id_auth_base64, -1, &len, errp);
2312
2313     if (!sev_snp_guest->id_auth) {
2314         return;
2315     }
2316
2317     if (len > KVM_SEV_SNP_ID_AUTH_SIZE) {
2318         error_setg(errp, "parameter length:ID_AUTH %" G_GSIZE_FORMAT
2319                    " exceeds max of %u",
2320                    len, KVM_SEV_SNP_ID_AUTH_SIZE);
2321         return;
2322     }
2323
2324     finish->id_auth_uaddr = (uintptr_t)sev_snp_guest->id_auth;
2325 }
2326
2327 static bool
2328 sev_snp_guest_get_author_key_enabled(Object *obj, Error **errp)
2329 {
2330     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2331
2332     return !!sev_snp_guest->kvm_finish_conf.auth_key_en;
2333 }
2334
2335 static void
2336 sev_snp_guest_set_author_key_enabled(Object *obj, bool value, Error **errp)
2337 {
2338     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2339
2340     sev_snp_guest->kvm_finish_conf.auth_key_en = value;
2341 }
2342
2343 static bool
2344 sev_snp_guest_get_vcek_disabled(Object *obj, Error **errp)
2345 {
2346     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2347
2348     return !!sev_snp_guest->kvm_finish_conf.vcek_disabled;
2349 }
2350
2351 static void
2352 sev_snp_guest_set_vcek_disabled(Object *obj, bool value, Error **errp)
2353 {
2354     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2355
2356     sev_snp_guest->kvm_finish_conf.vcek_disabled = value;
2357 }
2358
2359 static char *
2360 sev_snp_guest_get_host_data(Object *obj, Error **errp)
2361 {
2362     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2363
2364     return g_strdup(sev_snp_guest->host_data);
2365 }
2366
2367 static void
2368 sev_snp_guest_set_host_data(Object *obj, const char *value, Error **errp)
2369 {
2370     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2371     struct kvm_sev_snp_launch_finish *finish = &sev_snp_guest->kvm_finish_conf;
2372     g_autofree guchar *blob;
2373     gsize len;
2374
2375     g_free(sev_snp_guest->host_data);
2376
2377     /* store the base64 str so we don't need to re-encode in getter */
2378     sev_snp_guest->host_data = g_strdup(value);
2379
2380     blob = qbase64_decode(sev_snp_guest->host_data, -1, &len, errp);
2381
2382     if (!blob) {
2383         return;
2384     }
2385
2386     if (len != sizeof(finish->host_data)) {
2387         error_setg(errp, "parameter length of %" G_GSIZE_FORMAT
2388                    " not equal to %zu",
2389                    len, sizeof(finish->host_data));
2390         return;
2391     }
2392
2393     memcpy(finish->host_data, blob, len);
2394 }
2395
2396 static void
2397 sev_snp_guest_class_init(ObjectClass *oc, void *data)
2398 {
2399     SevCommonStateClass *klass = SEV_COMMON_CLASS(oc);
2400     X86ConfidentialGuestClass *x86_klass = X86_CONFIDENTIAL_GUEST_CLASS(oc);
2401
2402     klass->build_kernel_loader_hashes = sev_snp_build_kernel_loader_hashes;
2403     klass->launch_start = sev_snp_launch_start;
2404     klass->launch_finish = sev_snp_launch_finish;
2405     klass->launch_update_data = sev_snp_launch_update_data;
2406     klass->kvm_init = sev_snp_kvm_init;
2407     x86_klass->mask_cpuid_features = sev_snp_mask_cpuid_features;
2408     x86_klass->kvm_type = sev_snp_kvm_type;
2409
2410     object_class_property_add(oc, "policy", "uint64",
2411                               sev_snp_guest_get_policy,
2412                               sev_snp_guest_set_policy, NULL, NULL);
2413     object_class_property_add_str(oc, "guest-visible-workarounds",
2414                                   sev_snp_guest_get_guest_visible_workarounds,
2415                                   sev_snp_guest_set_guest_visible_workarounds);
2416     object_class_property_add_str(oc, "id-block",
2417                                   sev_snp_guest_get_id_block,
2418                                   sev_snp_guest_set_id_block);
2419     object_class_property_add_str(oc, "id-auth",
2420                                   sev_snp_guest_get_id_auth,
2421                                   sev_snp_guest_set_id_auth);
2422     object_class_property_add_bool(oc, "author-key-enabled",
2423                                    sev_snp_guest_get_author_key_enabled,
2424                                    sev_snp_guest_set_author_key_enabled);
2425     object_class_property_add_bool(oc, "vcek-disabled",
2426                                    sev_snp_guest_get_vcek_disabled,
2427                                    sev_snp_guest_set_vcek_disabled);
2428     object_class_property_add_str(oc, "host-data",
2429                                   sev_snp_guest_get_host_data,
2430                                   sev_snp_guest_set_host_data);
2431 }
2432
2433 static void
2434 sev_snp_guest_instance_init(Object *obj)
2435 {
2436     ConfidentialGuestSupport *cgs = CONFIDENTIAL_GUEST_SUPPORT(obj);
2437     SevSnpGuestState *sev_snp_guest = SEV_SNP_GUEST(obj);
2438
2439     cgs->require_guest_memfd = true;
2440
2441     /* default init/start/finish params for kvm */
2442     sev_snp_guest->kvm_start_conf.policy = DEFAULT_SEV_SNP_POLICY;
2443 }
2444
2445 /* guest info specific to sev-snp */
2446 static const TypeInfo sev_snp_guest_info = {
2447     .parent = TYPE_SEV_COMMON,
2448     .name = TYPE_SEV_SNP_GUEST,
2449     .instance_size = sizeof(SevSnpGuestState),
2450     .class_init = sev_snp_guest_class_init,
2451     .instance_init = sev_snp_guest_instance_init,
2452 };
2453
2454 static void
2455 sev_register_types(void)
2456 {
2457     type_register_static(&sev_common_info);
2458     type_register_static(&sev_guest_info);
2459     type_register_static(&sev_snp_guest_info);
2460 }
2461
2462 type_init(sev_register_types);