include/asm-generic/hyperv-tlfs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2
   3 /*
   4  * This file contains definitions from Hyper-V Hypervisor Top-Level Functional
   5  * Specification (TLFS):
   6  * https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs
   7  */
   8
   9 #ifndef _ASM_GENERIC_HYPERV_TLFS_H
  10 #define _ASM_GENERIC_HYPERV_TLFS_H
  11
  12 #include <linux/types.h>
  13 #include <linux/bits.h>
  14 #include <linux/time64.h>
  15
  16 /*
  17  * While not explicitly listed in the TLFS, Hyper-V always runs with a page size
  18  * of 4096. These definitions are used when communicating with Hyper-V using
  19  * guest physical pages and guest physical page addresses, since the guest page
  20  * size may not be 4096 on all architectures.
  21  */
  22 #define HV_HYP_PAGE_SHIFT      12
  23 #define HV_HYP_PAGE_SIZE       BIT(HV_HYP_PAGE_SHIFT)
  24 #define HV_HYP_PAGE_MASK       (~(HV_HYP_PAGE_SIZE - 1))
  25
  26 /*
  27  * Hyper-V provides two categories of flags relevant to guest VMs.  The
  28  * "Features" category indicates specific functionality that is available
  29  * to guests on this particular instance of Hyper-V. The "Features"
  30  * are presented in four groups, each of which is 32 bits. The group A
  31  * and B definitions are common across architectures and are listed here.
  32  * However, not all flags are relevant on all architectures.
  33  *
  34  * Groups C and D vary across architectures and are listed in the
  35  * architecture specific portion of hyperv-tlfs.h. Some of these flags exist
  36  * on multiple architectures, but the bit positions are different so they
  37  * cannot appear in the generic portion of hyperv-tlfs.h.
  38  *
  39  * The "Enlightenments" category provides recommendations on whether to use
  40  * specific enlightenments that are available. The Enlighenments are a single
  41  * group of 32 bits, but they vary across architectures and are listed in
  42  * the architecture specific portion of hyperv-tlfs.h.
  43  */
  44
  45 /*
  46  * Group A Features.
  47  */
  48
  49 /* VP Runtime register available */
  50 #define HV_MSR_VP_RUNTIME_AVAILABLE             BIT(0)
  51 /* Partition Reference Counter available*/
  52 #define HV_MSR_TIME_REF_COUNT_AVAILABLE         BIT(1)
  53 /* Basic SynIC register available */
  54 #define HV_MSR_SYNIC_AVAILABLE                  BIT(2)
  55 /* Synthetic Timer registers available */
  56 #define HV_MSR_SYNTIMER_AVAILABLE               BIT(3)
  57 /* Virtual APIC assist and VP assist page registers available */
  58 #define HV_MSR_APIC_ACCESS_AVAILABLE            BIT(4)
  59 /* Hypercall and Guest OS ID registers available*/
  60 #define HV_MSR_HYPERCALL_AVAILABLE              BIT(5)
  61 /* Access virtual processor index register available*/
  62 #define HV_MSR_VP_INDEX_AVAILABLE               BIT(6)
  63 /* Virtual system reset register available*/
  64 #define HV_MSR_RESET_AVAILABLE                  BIT(7)
  65 /* Access statistics page registers available */
  66 #define HV_MSR_STAT_PAGES_AVAILABLE             BIT(8)
  67 /* Partition reference TSC register is available */
  68 #define HV_MSR_REFERENCE_TSC_AVAILABLE          BIT(9)
  69 /* Partition Guest IDLE register is available */
  70 #define HV_MSR_GUEST_IDLE_AVAILABLE             BIT(10)
  71 /* Partition local APIC and TSC frequency registers available */
  72 #define HV_ACCESS_FREQUENCY_MSRS                BIT(11)
  73 /* AccessReenlightenmentControls privilege */
  74 #define HV_ACCESS_REENLIGHTENMENT               BIT(13)
  75 /* AccessTscInvariantControls privilege */
  76 #define HV_ACCESS_TSC_INVARIANT                 BIT(15)
  77
  78 /*
  79  * Group B features.
  80  */
  81 #define HV_CREATE_PARTITIONS                    BIT(0)
  82 #define HV_ACCESS_PARTITION_ID                  BIT(1)
  83 #define HV_ACCESS_MEMORY_POOL                   BIT(2)
  84 #define HV_ADJUST_MESSAGE_BUFFERS               BIT(3)
  85 #define HV_POST_MESSAGES                        BIT(4)
  86 #define HV_SIGNAL_EVENTS                        BIT(5)
  87 #define HV_CREATE_PORT                          BIT(6)
  88 #define HV_CONNECT_PORT                         BIT(7)
  89 #define HV_ACCESS_STATS                         BIT(8)
  90 #define HV_DEBUGGING                            BIT(11)
  91 #define HV_CPU_POWER_MANAGEMENT                 BIT(12)
  92
  93
  94 /*
  95  * TSC page layout.
  96  */
  97 struct ms_hyperv_tsc_page {
  98         volatile u32 tsc_sequence;
  99         u32 reserved1;
 100         volatile u64 tsc_scale;
 101         volatile s64 tsc_offset;
 102 } __packed;
 103
 104 /*
 105  * The guest OS needs to register the guest ID with the hypervisor.
 106  * The guest ID is a 64 bit entity and the structure of this ID is
 107  * specified in the Hyper-V specification:
 108  *
 109  * msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx
 110  *
 111  * While the current guideline does not specify how Linux guest ID(s)
 112  * need to be generated, our plan is to publish the guidelines for
 113  * Linux and other guest operating systems that currently are hosted
 114  * on Hyper-V. The implementation here conforms to this yet
 115  * unpublished guidelines.
 116  *
 117  *
 118  * Bit(s)
 119  * 63 - Indicates if the OS is Open Source or not; 1 is Open Source
 120  * 62:56 - Os Type; Linux is 0x100
 121  * 55:48 - Distro specific identification
 122  * 47:16 - Linux kernel version number
 123  * 15:0  - Distro specific identification
 124  *
 125  *
 126  */
 127
 128 #define HV_LINUX_VENDOR_ID              0x8100
 129
 130 /*
 131  * Crash notification flags.
 132  */
 133 #define HV_CRASH_CTL_CRASH_NOTIFY_MSG           BIT_ULL(62)
 134 #define HV_CRASH_CTL_CRASH_NOTIFY               BIT_ULL(63)
 135
 136 /* Declare the various hypercall operations. */
 137 #define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE      0x0002
 138 #define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST       0x0003
 139 #define HVCALL_NOTIFY_LONG_SPIN_WAIT            0x0008
 140 #define HVCALL_SEND_IPI                         0x000b
 141 #define HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX   0x0013
 142 #define HVCALL_FLUSH_VIRTUAL_ADDRESS_LIST_EX    0x0014
 143 #define HVCALL_SEND_IPI_EX                      0x0015
 144 #define HVCALL_GET_VP_REGISTERS                 0x0050
 145 #define HVCALL_SET_VP_REGISTERS                 0x0051
 146 #define HVCALL_POST_MESSAGE                     0x005c
 147 #define HVCALL_SIGNAL_EVENT                     0x005d
 148 #define HVCALL_POST_DEBUG_DATA                  0x0069
 149 #define HVCALL_RETRIEVE_DEBUG_DATA              0x006a
 150 #define HVCALL_RESET_DEBUG_SESSION              0x006b
 151 #define HVCALL_RETARGET_INTERRUPT               0x007e
 152 #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af
 153 #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0
 154
 155 #define HV_FLUSH_ALL_PROCESSORS                 BIT(0)
 156 #define HV_FLUSH_ALL_VIRTUAL_ADDRESS_SPACES     BIT(1)
 157 #define HV_FLUSH_NON_GLOBAL_MAPPINGS_ONLY       BIT(2)
 158 #define HV_FLUSH_USE_EXTENDED_RANGE_FORMAT      BIT(3)
 159
 160 enum HV_GENERIC_SET_FORMAT {
 161         HV_GENERIC_SET_SPARSE_4K,
 162         HV_GENERIC_SET_ALL,
 163 };
 164
 165 #define HV_PARTITION_ID_SELF            ((u64)-1)
 166 #define HV_VP_INDEX_SELF                ((u32)-2)
 167
 168 #define HV_HYPERCALL_RESULT_MASK        GENMASK_ULL(15, 0)
 169 #define HV_HYPERCALL_FAST_BIT           BIT(16)
 170 #define HV_HYPERCALL_VARHEAD_OFFSET     17
 171 #define HV_HYPERCALL_REP_COMP_OFFSET    32
 172 #define HV_HYPERCALL_REP_COMP_1         BIT_ULL(32)
 173 #define HV_HYPERCALL_REP_COMP_MASK      GENMASK_ULL(43, 32)
 174 #define HV_HYPERCALL_REP_START_OFFSET   48
 175 #define HV_HYPERCALL_REP_START_MASK     GENMASK_ULL(59, 48)
 176
 177 /* hypercall status code */
 178 #define HV_STATUS_SUCCESS                       0
 179 #define HV_STATUS_INVALID_HYPERCALL_CODE        2
 180 #define HV_STATUS_INVALID_HYPERCALL_INPUT       3
 181 #define HV_STATUS_INVALID_ALIGNMENT             4
 182 #define HV_STATUS_INVALID_PARAMETER             5
 183 #define HV_STATUS_OPERATION_DENIED              8
 184 #define HV_STATUS_INSUFFICIENT_MEMORY           11
 185 #define HV_STATUS_INVALID_PORT_ID               17
 186 #define HV_STATUS_INVALID_CONNECTION_ID         18
 187 #define HV_STATUS_INSUFFICIENT_BUFFERS          19
 188
 189 /*
 190  * The Hyper-V TimeRefCount register and the TSC
 191  * page provide a guest VM clock with 100ns tick rate
 192  */
 193 #define HV_CLOCK_HZ (NSEC_PER_SEC/100)
 194
 195 /* Define the number of synthetic interrupt sources. */
 196 #define HV_SYNIC_SINT_COUNT             (16)
 197 /* Define the expected SynIC version. */
 198 #define HV_SYNIC_VERSION_1              (0x1)
 199 /* Valid SynIC vectors are 16-255. */
 200 #define HV_SYNIC_FIRST_VALID_VECTOR     (16)
 201
 202 #define HV_SYNIC_CONTROL_ENABLE         (1ULL << 0)
 203 #define HV_SYNIC_SIMP_ENABLE            (1ULL << 0)
 204 #define HV_SYNIC_SIEFP_ENABLE           (1ULL << 0)
 205 #define HV_SYNIC_SINT_MASKED            (1ULL << 16)
 206 #define HV_SYNIC_SINT_AUTO_EOI          (1ULL << 17)
 207 #define HV_SYNIC_SINT_VECTOR_MASK       (0xFF)
 208
 209 #define HV_SYNIC_STIMER_COUNT           (4)
 210
 211 /* Define synthetic interrupt controller message constants. */
 212 #define HV_MESSAGE_SIZE                 (256)
 213 #define HV_MESSAGE_PAYLOAD_BYTE_COUNT   (240)
 214 #define HV_MESSAGE_PAYLOAD_QWORD_COUNT  (30)
 215
 216 /* Define synthetic interrupt controller message flags. */
 217 union hv_message_flags {
 218         __u8 asu8;
 219         struct {
 220                 __u8 msg_pending:1;
 221                 __u8 reserved:7;
 222         } __packed;
 223 };
 224
 225 /* Define port identifier type. */
 226 union hv_port_id {
 227         __u32 asu32;
 228         struct {
 229                 __u32 id:24;
 230                 __u32 reserved:8;
 231         } __packed u;
 232 };
 233
 234 /* Define synthetic interrupt controller message header. */
 235 struct hv_message_header {
 236         __u32 message_type;
 237         __u8 payload_size;
 238         union hv_message_flags message_flags;
 239         __u8 reserved[2];
 240         union {
 241                 __u64 sender;
 242                 union hv_port_id port;
 243         };
 244 } __packed;
 245
 246 /* Define synthetic interrupt controller message format. */
 247 struct hv_message {
 248         struct hv_message_header header;
 249         union {
 250                 __u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
 251         } u;
 252 } __packed;
 253
 254 /* Define the synthetic interrupt message page layout. */
 255 struct hv_message_page {
 256         struct hv_message sint_message[HV_SYNIC_SINT_COUNT];
 257 } __packed;
 258
 259 /* Define timer message payload structure. */
 260 struct hv_timer_message_payload {
 261         __u32 timer_index;
 262         __u32 reserved;
 263         __u64 expiration_time;  /* When the timer expired */
 264         __u64 delivery_time;    /* When the message was delivered */
 265 } __packed;
 266
 267
 268 /* Define synthetic interrupt controller flag constants. */
 269 #define HV_EVENT_FLAGS_COUNT            (256 * 8)
 270 #define HV_EVENT_FLAGS_LONG_COUNT       (256 / sizeof(unsigned long))
 271
 272 /*
 273  * Synthetic timer configuration.
 274  */
 275 union hv_stimer_config {
 276         u64 as_uint64;
 277         struct {
 278                 u64 enable:1;
 279                 u64 periodic:1;
 280                 u64 lazy:1;
 281                 u64 auto_enable:1;
 282                 u64 apic_vector:8;
 283                 u64 direct_mode:1;
 284                 u64 reserved_z0:3;
 285                 u64 sintx:4;
 286                 u64 reserved_z1:44;
 287         } __packed;
 288 };
 289
 290
 291 /* Define the synthetic interrupt controller event flags format. */
 292 union hv_synic_event_flags {
 293         unsigned long flags[HV_EVENT_FLAGS_LONG_COUNT];
 294 };
 295
 296 /* Define SynIC control register. */
 297 union hv_synic_scontrol {
 298         u64 as_uint64;
 299         struct {
 300                 u64 enable:1;
 301                 u64 reserved:63;
 302         } __packed;
 303 };
 304
 305 /* Define synthetic interrupt source. */
 306 union hv_synic_sint {
 307         u64 as_uint64;
 308         struct {
 309                 u64 vector:8;
 310                 u64 reserved1:8;
 311                 u64 masked:1;
 312                 u64 auto_eoi:1;
 313                 u64 polling:1;
 314                 u64 reserved2:45;
 315         } __packed;
 316 };
 317
 318 /* Define the format of the SIMP register */
 319 union hv_synic_simp {
 320         u64 as_uint64;
 321         struct {
 322                 u64 simp_enabled:1;
 323                 u64 preserved:11;
 324                 u64 base_simp_gpa:52;
 325         } __packed;
 326 };
 327
 328 /* Define the format of the SIEFP register */
 329 union hv_synic_siefp {
 330         u64 as_uint64;
 331         struct {
 332                 u64 siefp_enabled:1;
 333                 u64 preserved:11;
 334                 u64 base_siefp_gpa:52;
 335         } __packed;
 336 };
 337
 338 struct hv_vpset {
 339         u64 format;
 340         u64 valid_bank_mask;
 341         u64 bank_contents[];
 342 } __packed;
 343
 344 /* HvCallSendSyntheticClusterIpi hypercall */
 345 struct hv_send_ipi {
 346         u32 vector;
 347         u32 reserved;
 348         u64 cpu_mask;
 349 } __packed;
 350
 351 /* HvCallSendSyntheticClusterIpiEx hypercall */
 352 struct hv_send_ipi_ex {
 353         u32 vector;
 354         u32 reserved;
 355         struct hv_vpset vp_set;
 356 } __packed;
 357
 358 /* HvFlushGuestPhysicalAddressSpace hypercalls */
 359 struct hv_guest_mapping_flush {
 360         u64 address_space;
 361         u64 flags;
 362 } __packed;
 363
 364 /*
 365  *  HV_MAX_FLUSH_PAGES = "additional_pages" + 1. It's limited
 366  *  by the bitwidth of "additional_pages" in union hv_gpa_page_range.
 367  */
 368 #define HV_MAX_FLUSH_PAGES (2048)
 369
 370 /* HvFlushGuestPhysicalAddressList hypercall */
 371 union hv_gpa_page_range {
 372         u64 address_space;
 373         struct {
 374                 u64 additional_pages:11;
 375                 u64 largepage:1;
 376                 u64 basepfn:52;
 377         } page;
 378 };
 379
 380 /*
 381  * All input flush parameters should be in single page. The max flush
 382  * count is equal with how many entries of union hv_gpa_page_range can
 383  * be populated into the input parameter page.
 384  */
 385 #define HV_MAX_FLUSH_REP_COUNT ((HV_HYP_PAGE_SIZE - 2 * sizeof(u64)) /  \
 386                                 sizeof(union hv_gpa_page_range))
 387
 388 struct hv_guest_mapping_flush_list {
 389         u64 address_space;
 390         u64 flags;
 391         union hv_gpa_page_range gpa_list[HV_MAX_FLUSH_REP_COUNT];
 392 };
 393
 394 /* HvFlushVirtualAddressSpace, HvFlushVirtualAddressList hypercalls */
 395 struct hv_tlb_flush {
 396         u64 address_space;
 397         u64 flags;
 398         u64 processor_mask;
 399         u64 gva_list[];
 400 } __packed;
 401
 402 /* HvFlushVirtualAddressSpaceEx, HvFlushVirtualAddressListEx hypercalls */
 403 struct hv_tlb_flush_ex {
 404         u64 address_space;
 405         u64 flags;
 406         struct hv_vpset hv_vp_set;
 407         u64 gva_list[];
 408 } __packed;
 409
 410 /* HvRetargetDeviceInterrupt hypercall */
 411 union hv_msi_entry {
 412         u64 as_uint64;
 413         struct {
 414                 u32 address;
 415                 u32 data;
 416         } __packed;
 417 };
 418
 419 struct hv_interrupt_entry {
 420         u32 source;                     /* 1 for MSI(-X) */
 421         u32 reserved1;
 422         union hv_msi_entry msi_entry;
 423 } __packed;
 424
 425 /*
 426  * flags for hv_device_interrupt_target.flags
 427  */
 428 #define HV_DEVICE_INTERRUPT_TARGET_MULTICAST            1
 429 #define HV_DEVICE_INTERRUPT_TARGET_PROCESSOR_SET        2
 430
 431 struct hv_device_interrupt_target {
 432         u32 vector;
 433         u32 flags;
 434         union {
 435                 u64 vp_mask;
 436                 struct hv_vpset vp_set;
 437         };
 438 } __packed;
 439
 440 struct hv_retarget_device_interrupt {
 441         u64 partition_id;               /* use "self" */
 442         u64 device_id;
 443         struct hv_interrupt_entry int_entry;
 444         u64 reserved2;
 445         struct hv_device_interrupt_target int_target;
 446 } __packed __aligned(8);
 447
 448
 449 /* HvGetVpRegisters hypercall input with variable size reg name list*/
 450 struct hv_get_vp_registers_input {
 451         struct {
 452                 u64 partitionid;
 453                 u32 vpindex;
 454                 u8  inputvtl;
 455                 u8  padding[3];
 456         } header;
 457         struct input {
 458                 u32 name0;
 459                 u32 name1;
 460         } element[];
 461 } __packed;
 462
 463
 464 /* HvGetVpRegisters returns an array of these output elements */
 465 struct hv_get_vp_registers_output {
 466         union {
 467                 struct {
 468                         u32 a;
 469                         u32 b;
 470                         u32 c;
 471                         u32 d;
 472                 } as32 __packed;
 473                 struct {
 474                         u64 low;
 475                         u64 high;
 476                 } as64 __packed;
 477         };
 478 };
 479
 480 /* HvSetVpRegisters hypercall with variable size reg name/value list*/
 481 struct hv_set_vp_registers_input {
 482         struct {
 483                 u64 partitionid;
 484                 u32 vpindex;
 485                 u8  inputvtl;
 486                 u8  padding[3];
 487         } header;
 488         struct {
 489                 u32 name;
 490                 u32 padding1;
 491                 u64 padding2;
 492                 u64 valuelow;
 493                 u64 valuehigh;
 494         } element[];
 495 } __packed;
 496
 497 #endif