1/* 2 * 3 * Copyright (c) 2011, Microsoft Corporation. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms and conditions of the GNU General Public License, 7 * version 2, as published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * You should have received a copy of the GNU General Public License along with 15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple 16 * Place - Suite 330, Boston, MA 02111-1307 USA. 17 * 18 * Authors: 19 * Haiyang Zhang <haiyangz@microsoft.com> 20 * Hank Janssen <hjanssen@microsoft.com> 21 * K. Y. Srinivasan <kys@microsoft.com> 22 * 23 */ 24 25#ifndef _HYPERV_VMBUS_H 26#define _HYPERV_VMBUS_H 27 28#include <linux/list.h> 29#include <asm/sync_bitops.h> 30#include <linux/atomic.h> 31#include <linux/hyperv.h> 32 33/* 34 * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent 35 * is set by CPUID(HVCPUID_VERSION_FEATURES). 36 */ 37enum hv_cpuid_function { 38 HVCPUID_VERSION_FEATURES = 0x00000001, 39 HVCPUID_VENDOR_MAXFUNCTION = 0x40000000, 40 HVCPUID_INTERFACE = 0x40000001, 41 42 /* 43 * The remaining functions depend on the value of 44 * HVCPUID_INTERFACE 45 */ 46 HVCPUID_VERSION = 0x40000002, 47 HVCPUID_FEATURES = 0x40000003, 48 HVCPUID_ENLIGHTENMENT_INFO = 0x40000004, 49 HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005, 50}; 51 52/* Define version of the synthetic interrupt controller. */ 53#define HV_SYNIC_VERSION (1) 54 55/* Define the expected SynIC version. */ 56#define HV_SYNIC_VERSION_1 (0x1) 57 58/* Define synthetic interrupt controller message constants. */ 59#define HV_MESSAGE_SIZE (256) 60#define HV_MESSAGE_PAYLOAD_BYTE_COUNT (240) 61#define HV_MESSAGE_PAYLOAD_QWORD_COUNT (30) 62#define HV_ANY_VP (0xFFFFFFFF) 63 64/* Define synthetic interrupt controller flag constants. */ 65#define HV_EVENT_FLAGS_COUNT (256 * 8) 66#define HV_EVENT_FLAGS_BYTE_COUNT (256) 67#define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(u32)) 68 69/* Define hypervisor message types. */ 70enum hv_message_type { 71 HVMSG_NONE = 0x00000000, 72 73 /* Memory access messages. */ 74 HVMSG_UNMAPPED_GPA = 0x80000000, 75 HVMSG_GPA_INTERCEPT = 0x80000001, 76 77 /* Timer notification messages. */ 78 HVMSG_TIMER_EXPIRED = 0x80000010, 79 80 /* Error messages. */ 81 HVMSG_INVALID_VP_REGISTER_VALUE = 0x80000020, 82 HVMSG_UNRECOVERABLE_EXCEPTION = 0x80000021, 83 HVMSG_UNSUPPORTED_FEATURE = 0x80000022, 84 85 /* Trace buffer complete messages. */ 86 HVMSG_EVENTLOG_BUFFERCOMPLETE = 0x80000040, 87 88 /* Platform-specific processor intercept messages. */ 89 HVMSG_X64_IOPORT_INTERCEPT = 0x80010000, 90 HVMSG_X64_MSR_INTERCEPT = 0x80010001, 91 HVMSG_X64_CPUID_INTERCEPT = 0x80010002, 92 HVMSG_X64_EXCEPTION_INTERCEPT = 0x80010003, 93 HVMSG_X64_APIC_EOI = 0x80010004, 94 HVMSG_X64_LEGACY_FP_ERROR = 0x80010005 95}; 96 97/* Define the number of synthetic interrupt sources. */ 98#define HV_SYNIC_SINT_COUNT (16) 99#define HV_SYNIC_STIMER_COUNT (4) 100 101/* Define invalid partition identifier. */ 102#define HV_PARTITION_ID_INVALID ((u64)0x0) 103 104/* Define port identifier type. */ 105union hv_port_id { 106 u32 asu32; 107 struct { 108 u32 id:24; 109 u32 reserved:8; 110 } u ; 111}; 112 113/* Define port type. */ 114enum hv_port_type { 115 HVPORT_MSG = 1, 116 HVPORT_EVENT = 2, 117 HVPORT_MONITOR = 3 118}; 119 120/* Define port information structure. */ 121struct hv_port_info { 122 enum hv_port_type port_type; 123 u32 padding; 124 union { 125 struct { 126 u32 target_sint; 127 u32 target_vp; 128 u64 rsvdz; 129 } message_port_info; 130 struct { 131 u32 target_sint; 132 u32 target_vp; 133 u16 base_flag_bumber; 134 u16 flag_count; 135 u32 rsvdz; 136 } event_port_info; 137 struct { 138 u64 monitor_address; 139 u64 rsvdz; 140 } monitor_port_info; 141 }; 142}; 143 144struct hv_connection_info { 145 enum hv_port_type port_type; 146 u32 padding; 147 union { 148 struct { 149 u64 rsvdz; 150 } message_connection_info; 151 struct { 152 u64 rsvdz; 153 } event_connection_info; 154 struct { 155 u64 monitor_address; 156 } monitor_connection_info; 157 }; 158}; 159 160/* Define synthetic interrupt controller message flags. */ 161union hv_message_flags { 162 u8 asu8; 163 struct { 164 u8 msg_pending:1; 165 u8 reserved:7; 166 }; 167}; 168 169/* Define synthetic interrupt controller message header. */ 170struct hv_message_header { 171 enum hv_message_type message_type; 172 u8 payload_size; 173 union hv_message_flags message_flags; 174 u8 reserved[2]; 175 union { 176 u64 sender; 177 union hv_port_id port; 178 }; 179}; 180 181/* Define timer message payload structure. */ 182struct hv_timer_message_payload { 183 u32 timer_index; 184 u32 reserved; 185 u64 expiration_time; /* When the timer expired */ 186 u64 delivery_time; /* When the message was delivered */ 187}; 188 189/* Define synthetic interrupt controller message format. */ 190struct hv_message { 191 struct hv_message_header header; 192 union { 193 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; 194 } u ; 195}; 196 197/* Define the number of message buffers associated with each port. */ 198#define HV_PORT_MESSAGE_BUFFER_COUNT (16) 199 200/* Define the synthetic interrupt message page layout. */ 201struct hv_message_page { 202 struct hv_message sint_message[HV_SYNIC_SINT_COUNT]; 203}; 204 205/* Define the synthetic interrupt controller event flags format. */ 206union hv_synic_event_flags { 207 u8 flags8[HV_EVENT_FLAGS_BYTE_COUNT]; 208 u32 flags32[HV_EVENT_FLAGS_DWORD_COUNT]; 209}; 210 211/* Define the synthetic interrupt flags page layout. */ 212struct hv_synic_event_flags_page { 213 union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT]; 214}; 215 216/* Define SynIC control register. */ 217union hv_synic_scontrol { 218 u64 as_uint64; 219 struct { 220 u64 enable:1; 221 u64 reserved:63; 222 }; 223}; 224 225/* Define synthetic interrupt source. */ 226union hv_synic_sint { 227 u64 as_uint64; 228 struct { 229 u64 vector:8; 230 u64 reserved1:8; 231 u64 masked:1; 232 u64 auto_eoi:1; 233 u64 reserved2:46; 234 }; 235}; 236 237/* Define the format of the SIMP register */ 238union hv_synic_simp { 239 u64 as_uint64; 240 struct { 241 u64 simp_enabled:1; 242 u64 preserved:11; 243 u64 base_simp_gpa:52; 244 }; 245}; 246 247/* Define the format of the SIEFP register */ 248union hv_synic_siefp { 249 u64 as_uint64; 250 struct { 251 u64 siefp_enabled:1; 252 u64 preserved:11; 253 u64 base_siefp_gpa:52; 254 }; 255}; 256 257/* Definitions for the monitored notification facility */ 258union hv_monitor_trigger_group { 259 u64 as_uint64; 260 struct { 261 u32 pending; 262 u32 armed; 263 }; 264}; 265 266struct hv_monitor_parameter { 267 union hv_connection_id connectionid; 268 u16 flagnumber; 269 u16 rsvdz; 270}; 271 272union hv_monitor_trigger_state { 273 u32 asu32; 274 275 struct { 276 u32 group_enable:4; 277 u32 rsvdz:28; 278 }; 279}; 280 281/* struct hv_monitor_page Layout */ 282/* ------------------------------------------------------ */ 283/* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */ 284/* | 8 | TriggerGroup[0] | */ 285/* | 10 | TriggerGroup[1] | */ 286/* | 18 | TriggerGroup[2] | */ 287/* | 20 | TriggerGroup[3] | */ 288/* | 28 | Rsvd2[0] | */ 289/* | 30 | Rsvd2[1] | */ 290/* | 38 | Rsvd2[2] | */ 291/* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */ 292/* | ... | */ 293/* | 240 | Latency[0][0..3] | */ 294/* | 340 | Rsvz3[0] | */ 295/* | 440 | Parameter[0][0] | */ 296/* | 448 | Parameter[0][1] | */ 297/* | ... | */ 298/* | 840 | Rsvd4[0] | */ 299/* ------------------------------------------------------ */ 300struct hv_monitor_page { 301 union hv_monitor_trigger_state trigger_state; 302 u32 rsvdz1; 303 304 union hv_monitor_trigger_group trigger_group[4]; 305 u64 rsvdz2[3]; 306 307 s32 next_checktime[4][32]; 308 309 u16 latency[4][32]; 310 u64 rsvdz3[32]; 311 312 struct hv_monitor_parameter parameter[4][32]; 313 314 u8 rsvdz4[1984]; 315}; 316 317/* Declare the various hypercall operations. */ 318enum hv_call_code { 319 HVCALL_POST_MESSAGE = 0x005c, 320 HVCALL_SIGNAL_EVENT = 0x005d, 321}; 322 323/* Definition of the hv_post_message hypercall input structure. */ 324struct hv_input_post_message { 325 union hv_connection_id connectionid; 326 u32 reserved; 327 enum hv_message_type message_type; 328 u32 payload_size; 329 u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; 330}; 331 332/* 333 * Versioning definitions used for guests reporting themselves to the 334 * hypervisor, and visa versa. 335 */ 336 337/* Version info reported by guest OS's */ 338enum hv_guest_os_vendor { 339 HVGUESTOS_VENDOR_MICROSOFT = 0x0001 340}; 341 342enum hv_guest_os_microsoft_ids { 343 HVGUESTOS_MICROSOFT_UNDEFINED = 0x00, 344 HVGUESTOS_MICROSOFT_MSDOS = 0x01, 345 HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02, 346 HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03, 347 HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04, 348 HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05 349}; 350 351/* 352 * Declare the MSR used to identify the guest OS. 353 */ 354#define HV_X64_MSR_GUEST_OS_ID 0x40000000 355 356union hv_x64_msr_guest_os_id_contents { 357 u64 as_uint64; 358 struct { 359 u64 build_number:16; 360 u64 service_version:8; /* Service Pack, etc. */ 361 u64 minor_version:8; 362 u64 major_version:8; 363 u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */ 364 u64 vendor_id:16; /* enum hv_guest_os_vendor */ 365 }; 366}; 367 368/* 369 * Declare the MSR used to setup pages used to communicate with the hypervisor. 370 */ 371#define HV_X64_MSR_HYPERCALL 0x40000001 372 373union hv_x64_msr_hypercall_contents { 374 u64 as_uint64; 375 struct { 376 u64 enable:1; 377 u64 reserved:11; 378 u64 guest_physical_address:52; 379 }; 380}; 381 382 383enum { 384 VMBUS_MESSAGE_CONNECTION_ID = 1, 385 VMBUS_MESSAGE_PORT_ID = 1, 386 VMBUS_EVENT_CONNECTION_ID = 2, 387 VMBUS_EVENT_PORT_ID = 2, 388 VMBUS_MONITOR_CONNECTION_ID = 3, 389 VMBUS_MONITOR_PORT_ID = 3, 390 VMBUS_MESSAGE_SINT = 2, 391}; 392 393/* #defines */ 394 395#define HV_PRESENT_BIT 0x80000000 396 397/* 398 * The guest OS needs to register the guest ID with the hypervisor. 399 * The guest ID is a 64 bit entity and the structure of this ID is 400 * specified in the Hyper-V specification: 401 * 402 * http://msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx 403 * 404 * While the current guideline does not specify how Linux guest ID(s) 405 * need to be generated, our plan is to publish the guidelines for 406 * Linux and other guest operating systems that currently are hosted 407 * on Hyper-V. The implementation here conforms to this yet 408 * unpublished guidelines. 409 * 410 * 411 * Bit(s) 412 * 63 - Indicates if the OS is Open Source or not; 1 is Open Source 413 * 62:56 - Os Type; Linux is 0x100 414 * 55:48 - Distro specific identification 415 * 47:16 - Linux kernel version number 416 * 15:0 - Distro specific identification 417 * 418 * 419 */ 420 421#define HV_LINUX_VENDOR_ID 0x8100 422 423/* 424 * Generate the guest ID based on the guideline described above. 425 */ 426 427static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version, 428 __u16 d_info2) 429{ 430 __u64 guest_id = 0; 431 432 guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48); 433 guest_id |= (((__u64)(d_info1)) << 48); 434 guest_id |= (((__u64)(kernel_version)) << 16); 435 guest_id |= ((__u64)(d_info2)); 436 437 return guest_id; 438} 439 440 441#define HV_CPU_POWER_MANAGEMENT (1 << 0) 442#define HV_RECOMMENDATIONS_MAX 4 443 444#define HV_X64_MAX 5 445#define HV_CAPS_MAX 8 446 447 448#define HV_HYPERCALL_PARAM_ALIGN sizeof(u64) 449 450 451/* Service definitions */ 452 453#define HV_SERVICE_PARENT_PORT (0) 454#define HV_SERVICE_PARENT_CONNECTION (0) 455 456#define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0) 457#define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1) 458#define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2) 459#define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3) 460 461#define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1) 462#define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2) 463#define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3) 464#define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4) 465#define HV_SERVICE_MAX_MESSAGE_ID (4) 466 467#define HV_SERVICE_PROTOCOL_VERSION (0x0010) 468#define HV_CONNECT_PAYLOAD_BYTE_COUNT 64 469 470/* #define VMBUS_REVISION_NUMBER 6 */ 471 472/* Our local vmbus's port and connection id. Anything >0 is fine */ 473/* #define VMBUS_PORT_ID 11 */ 474 475/* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */ 476static const uuid_le VMBUS_SERVICE_ID = { 477 .b = { 478 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c, 479 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4 480 }, 481}; 482 483 484 485struct hv_context { 486 /* We only support running on top of Hyper-V 487 * So at this point this really can only contain the Hyper-V ID 488 */ 489 u64 guestid; 490 491 void *hypercall_page; 492 493 bool synic_initialized; 494 495 void *synic_message_page[NR_CPUS]; 496 void *synic_event_page[NR_CPUS]; 497 /* 498 * Hypervisor's notion of virtual processor ID is different from 499 * Linux' notion of CPU ID. This information can only be retrieved 500 * in the context of the calling CPU. Setup a map for easy access 501 * to this information: 502 * 503 * vp_index[a] is the Hyper-V's processor ID corresponding to 504 * Linux cpuid 'a'. 505 */ 506 u32 vp_index[NR_CPUS]; 507 /* 508 * Starting with win8, we can take channel interrupts on any CPU; 509 * we will manage the tasklet that handles events on a per CPU 510 * basis. 511 */ 512 struct tasklet_struct *event_dpc[NR_CPUS]; 513 /* 514 * To optimize the mapping of relid to channel, maintain 515 * per-cpu list of the channels based on their CPU affinity. 516 */ 517 struct list_head percpu_list[NR_CPUS]; 518 /* 519 * buffer to post messages to the host. 520 */ 521 void *post_msg_page[NR_CPUS]; 522}; 523 524extern struct hv_context hv_context; 525 526struct hv_ring_buffer_debug_info { 527 u32 current_interrupt_mask; 528 u32 current_read_index; 529 u32 current_write_index; 530 u32 bytes_avail_toread; 531 u32 bytes_avail_towrite; 532}; 533 534/* Hv Interface */ 535 536extern int hv_init(void); 537 538extern void hv_cleanup(void); 539 540extern int hv_post_message(union hv_connection_id connection_id, 541 enum hv_message_type message_type, 542 void *payload, size_t payload_size); 543 544extern u16 hv_signal_event(void *con_id); 545 546extern int hv_synic_alloc(void); 547 548extern void hv_synic_free(void); 549 550extern void hv_synic_init(void *irqarg); 551 552extern void hv_synic_cleanup(void *arg); 553 554/* 555 * Host version information. 556 */ 557extern unsigned int host_info_eax; 558extern unsigned int host_info_ebx; 559extern unsigned int host_info_ecx; 560extern unsigned int host_info_edx; 561 562/* Interface */ 563 564 565int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, 566 u32 buflen); 567 568void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); 569 570int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info, 571 struct kvec *kv_list, 572 u32 kv_count, bool *signal); 573 574int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer, 575 u32 buflen); 576 577int hv_ringbuffer_read(struct hv_ring_buffer_info *ring_info, 578 void *buffer, 579 u32 buflen, 580 u32 offset, bool *signal); 581 582 583void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, 584 struct hv_ring_buffer_debug_info *debug_info); 585 586void hv_begin_read(struct hv_ring_buffer_info *rbi); 587 588u32 hv_end_read(struct hv_ring_buffer_info *rbi); 589 590/* 591 * Maximum channels is determined by the size of the interrupt page 592 * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt 593 * and the other is receive endpoint interrupt 594 */ 595#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */ 596 597/* The value here must be in multiple of 32 */ 598/* TODO: Need to make this configurable */ 599#define MAX_NUM_CHANNELS_SUPPORTED 256 600 601 602enum vmbus_connect_state { 603 DISCONNECTED, 604 CONNECTING, 605 CONNECTED, 606 DISCONNECTING 607}; 608 609#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT 610 611struct vmbus_connection { 612 enum vmbus_connect_state conn_state; 613 614 atomic_t next_gpadl_handle; 615 616 /* 617 * Represents channel interrupts. Each bit position represents a 618 * channel. When a channel sends an interrupt via VMBUS, it finds its 619 * bit in the sendInterruptPage, set it and calls Hv to generate a port 620 * event. The other end receives the port event and parse the 621 * recvInterruptPage to see which bit is set 622 */ 623 void *int_page; 624 void *send_int_page; 625 void *recv_int_page; 626 627 /* 628 * 2 pages - 1st page for parent->child notification and 2nd 629 * is child->parent notification 630 */ 631 struct hv_monitor_page *monitor_pages[2]; 632 struct list_head chn_msg_list; 633 spinlock_t channelmsg_lock; 634 635 /* List of channels */ 636 struct list_head chn_list; 637 spinlock_t channel_lock; 638 639 struct workqueue_struct *work_queue; 640}; 641 642 643struct vmbus_msginfo { 644 /* Bookkeeping stuff */ 645 struct list_head msglist_entry; 646 647 /* The message itself */ 648 unsigned char msg[0]; 649}; 650 651 652extern struct vmbus_connection vmbus_connection; 653 654/* General vmbus interface */ 655 656struct hv_device *vmbus_device_create(const uuid_le *type, 657 const uuid_le *instance, 658 struct vmbus_channel *channel); 659 660int vmbus_device_register(struct hv_device *child_device_obj); 661void vmbus_device_unregister(struct hv_device *device_obj); 662 663/* static void */ 664/* VmbusChildDeviceDestroy( */ 665/* struct hv_device *); */ 666 667struct vmbus_channel *relid2channel(u32 relid); 668 669void vmbus_free_channels(void); 670 671/* Connection interface */ 672 673int vmbus_connect(void); 674 675int vmbus_post_msg(void *buffer, size_t buflen); 676 677int vmbus_set_event(struct vmbus_channel *channel); 678 679void vmbus_on_event(unsigned long data); 680 681int hv_fcopy_init(struct hv_util_service *); 682void hv_fcopy_deinit(void); 683void hv_fcopy_onchannelcallback(void *); 684 685 686#endif /* _HYPERV_VMBUS_H */ 687