/* * * Copyright (c) 2011, Microsoft Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., 59 Temple * Place - Suite 330, Boston, MA 02111-1307 USA. * * Authors: * Haiyang Zhang <haiyangz@microsoft.com> * Hank Janssen <hjanssen@microsoft.com> * K. Y. Srinivasan <kys@microsoft.com> * */ #ifndef _HYPERV_VMBUS_H #define _HYPERV_VMBUS_H #include <linux/list.h> #include <asm/sync_bitops.h> #include <linux/atomic.h> #include <linux/hyperv.h> /* * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent * is set by CPUID(HVCPUID_VERSION_FEATURES). */ enum hv_cpuid_function { HVCPUID_VERSION_FEATURES = 0x00000001, HVCPUID_VENDOR_MAXFUNCTION = 0x40000000, HVCPUID_INTERFACE = 0x40000001, /* * The remaining functions depend on the value of * HVCPUID_INTERFACE */ HVCPUID_VERSION = 0x40000002, HVCPUID_FEATURES = 0x40000003, HVCPUID_ENLIGHTENMENT_INFO = 0x40000004, HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005, }; /* Define version of the synthetic interrupt controller. */ #define HV_SYNIC_VERSION (1) /* Define the expected SynIC version. */ #define HV_SYNIC_VERSION_1 (0x1) /* Define synthetic interrupt controller message constants. */ #define HV_MESSAGE_SIZE (256) #define HV_MESSAGE_PAYLOAD_BYTE_COUNT (240) #define HV_MESSAGE_PAYLOAD_QWORD_COUNT (30) #define HV_ANY_VP (0xFFFFFFFF) /* Define synthetic interrupt controller flag constants. */ #define HV_EVENT_FLAGS_COUNT (256 * 8) #define HV_EVENT_FLAGS_BYTE_COUNT (256) #define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(u32)) /* Define hypervisor message types. */ enum hv_message_type { HVMSG_NONE = 0x00000000, /* Memory access messages. */ HVMSG_UNMAPPED_GPA = 0x80000000, HVMSG_GPA_INTERCEPT = 0x80000001, /* Timer notification messages. */ HVMSG_TIMER_EXPIRED = 0x80000010, /* Error messages. */ HVMSG_INVALID_VP_REGISTER_VALUE = 0x80000020, HVMSG_UNRECOVERABLE_EXCEPTION = 0x80000021, HVMSG_UNSUPPORTED_FEATURE = 0x80000022, /* Trace buffer complete messages. */ HVMSG_EVENTLOG_BUFFERCOMPLETE = 0x80000040, /* Platform-specific processor intercept messages. */ HVMSG_X64_IOPORT_INTERCEPT = 0x80010000, HVMSG_X64_MSR_INTERCEPT = 0x80010001, HVMSG_X64_CPUID_INTERCEPT = 0x80010002, HVMSG_X64_EXCEPTION_INTERCEPT = 0x80010003, HVMSG_X64_APIC_EOI = 0x80010004, HVMSG_X64_LEGACY_FP_ERROR = 0x80010005 }; /* Define the number of synthetic interrupt sources. */ #define HV_SYNIC_SINT_COUNT (16) #define HV_SYNIC_STIMER_COUNT (4) /* Define invalid partition identifier. */ #define HV_PARTITION_ID_INVALID ((u64)0x0) /* Define connection identifier type. */ union hv_connection_id { u32 asu32; struct { u32 id:24; u32 reserved:8; } u; }; /* Define port identifier type. */ union hv_port_id { u32 asu32; struct { u32 id:24; u32 reserved:8; } u ; }; /* Define port type. */ enum hv_port_type { HVPORT_MSG = 1, HVPORT_EVENT = 2, HVPORT_MONITOR = 3 }; /* Define port information structure. */ struct hv_port_info { enum hv_port_type port_type; u32 padding; union { struct { u32 target_sint; u32 target_vp; u64 rsvdz; } message_port_info; struct { u32 target_sint; u32 target_vp; u16 base_flag_bumber; u16 flag_count; u32 rsvdz; } event_port_info; struct { u64 monitor_address; u64 rsvdz; } monitor_port_info; }; }; struct hv_connection_info { enum hv_port_type port_type; u32 padding; union { struct { u64 rsvdz; } message_connection_info; struct { u64 rsvdz; } event_connection_info; struct { u64 monitor_address; } monitor_connection_info; }; }; /* Define synthetic interrupt controller message flags. */ union hv_message_flags { u8 asu8; struct { u8 msg_pending:1; u8 reserved:7; }; }; /* Define synthetic interrupt controller message header. */ struct hv_message_header { enum hv_message_type message_type; u8 payload_size; union hv_message_flags message_flags; u8 reserved[2]; union { u64 sender; union hv_port_id port; }; }; /* Define timer message payload structure. */ struct hv_timer_message_payload { u32 timer_index; u32 reserved; u64 expiration_time; /* When the timer expired */ u64 delivery_time; /* When the message was delivered */ }; /* Define synthetic interrupt controller message format. */ struct hv_message { struct hv_message_header header; union { u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; } u ; }; /* Define the number of message buffers associated with each port. */ #define HV_PORT_MESSAGE_BUFFER_COUNT (16) /* Define the synthetic interrupt message page layout. */ struct hv_message_page { struct hv_message sint_message[HV_SYNIC_SINT_COUNT]; }; /* Define the synthetic interrupt controller event flags format. */ union hv_synic_event_flags { u8 flags8[HV_EVENT_FLAGS_BYTE_COUNT]; u32 flags32[HV_EVENT_FLAGS_DWORD_COUNT]; }; /* Define the synthetic interrupt flags page layout. */ struct hv_synic_event_flags_page { union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT]; }; /* Define SynIC control register. */ union hv_synic_scontrol { u64 as_uint64; struct { u64 enable:1; u64 reserved:63; }; }; /* Define synthetic interrupt source. */ union hv_synic_sint { u64 as_uint64; struct { u64 vector:8; u64 reserved1:8; u64 masked:1; u64 auto_eoi:1; u64 reserved2:46; }; }; /* Define the format of the SIMP register */ union hv_synic_simp { u64 as_uint64; struct { u64 simp_enabled:1; u64 preserved:11; u64 base_simp_gpa:52; }; }; /* Define the format of the SIEFP register */ union hv_synic_siefp { u64 as_uint64; struct { u64 siefp_enabled:1; u64 preserved:11; u64 base_siefp_gpa:52; }; }; /* Definitions for the monitored notification facility */ union hv_monitor_trigger_group { u64 as_uint64; struct { u32 pending; u32 armed; }; }; struct hv_monitor_parameter { union hv_connection_id connectionid; u16 flagnumber; u16 rsvdz; }; union hv_monitor_trigger_state { u32 asu32; struct { u32 group_enable:4; u32 rsvdz:28; }; }; /* struct hv_monitor_page Layout */ /* ------------------------------------------------------ */ /* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */ /* | 8 | TriggerGroup[0] | */ /* | 10 | TriggerGroup[1] | */ /* | 18 | TriggerGroup[2] | */ /* | 20 | TriggerGroup[3] | */ /* | 28 | Rsvd2[0] | */ /* | 30 | Rsvd2[1] | */ /* | 38 | Rsvd2[2] | */ /* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */ /* | ... | */ /* | 240 | Latency[0][0..3] | */ /* | 340 | Rsvz3[0] | */ /* | 440 | Parameter[0][0] | */ /* | 448 | Parameter[0][1] | */ /* | ... | */ /* | 840 | Rsvd4[0] | */ /* ------------------------------------------------------ */ struct hv_monitor_page { union hv_monitor_trigger_state trigger_state; u32 rsvdz1; union hv_monitor_trigger_group trigger_group[4]; u64 rsvdz2[3]; s32 next_checktime[4][32]; u16 latency[4][32]; u64 rsvdz3[32]; struct hv_monitor_parameter parameter[4][32]; u8 rsvdz4[1984]; }; /* Declare the various hypercall operations. */ enum hv_call_code { HVCALL_POST_MESSAGE = 0x005c, HVCALL_SIGNAL_EVENT = 0x005d, }; /* Definition of the hv_post_message hypercall input structure. */ struct hv_input_post_message { union hv_connection_id connectionid; u32 reserved; enum hv_message_type message_type; u32 payload_size; u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT]; }; /* Definition of the hv_signal_event hypercall input structure. */ struct hv_input_signal_event { union hv_connection_id connectionid; u16 flag_number; u16 rsvdz; }; /* * Versioning definitions used for guests reporting themselves to the * hypervisor, and visa versa. */ /* Version info reported by guest OS's */ enum hv_guest_os_vendor { HVGUESTOS_VENDOR_MICROSOFT = 0x0001 }; enum hv_guest_os_microsoft_ids { HVGUESTOS_MICROSOFT_UNDEFINED = 0x00, HVGUESTOS_MICROSOFT_MSDOS = 0x01, HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02, HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03, HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04, HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05 }; /* * Declare the MSR used to identify the guest OS. */ #define HV_X64_MSR_GUEST_OS_ID 0x40000000 union hv_x64_msr_guest_os_id_contents { u64 as_uint64; struct { u64 build_number:16; u64 service_version:8; /* Service Pack, etc. */ u64 minor_version:8; u64 major_version:8; u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */ u64 vendor_id:16; /* enum hv_guest_os_vendor */ }; }; /* * Declare the MSR used to setup pages used to communicate with the hypervisor. */ #define HV_X64_MSR_HYPERCALL 0x40000001 union hv_x64_msr_hypercall_contents { u64 as_uint64; struct { u64 enable:1; u64 reserved:11; u64 guest_physical_address:52; }; }; enum { VMBUS_MESSAGE_CONNECTION_ID = 1, VMBUS_MESSAGE_PORT_ID = 1, VMBUS_EVENT_CONNECTION_ID = 2, VMBUS_EVENT_PORT_ID = 2, VMBUS_MONITOR_CONNECTION_ID = 3, VMBUS_MONITOR_PORT_ID = 3, VMBUS_MESSAGE_SINT = 2, }; /* #defines */ #define HV_PRESENT_BIT 0x80000000 /* * The guest OS needs to register the guest ID with the hypervisor. * The guest ID is a 64 bit entity and the structure of this ID is * specified in the Hyper-V specification: * * http://msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx * * While the current guideline does not specify how Linux guest ID(s) * need to be generated, our plan is to publish the guidelines for * Linux and other guest operating systems that currently are hosted * on Hyper-V. The implementation here conforms to this yet * unpublished guidelines. * * * Bit(s) * 63 - Indicates if the OS is Open Source or not; 1 is Open Source * 62:56 - Os Type; Linux is 0x100 * 55:48 - Distro specific identification * 47:16 - Linux kernel version number * 15:0 - Distro specific identification * * */ #define HV_LINUX_VENDOR_ID 0x8100 /* * Generate the guest ID based on the guideline described above. */ static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version, __u16 d_info2) { __u64 guest_id = 0; guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48); guest_id |= (((__u64)(d_info1)) << 48); guest_id |= (((__u64)(kernel_version)) << 16); guest_id |= ((__u64)(d_info2)); return guest_id; } #define HV_CPU_POWER_MANAGEMENT (1 << 0) #define HV_RECOMMENDATIONS_MAX 4 #define HV_X64_MAX 5 #define HV_CAPS_MAX 8 #define HV_HYPERCALL_PARAM_ALIGN sizeof(u64) /* Service definitions */ #define HV_SERVICE_PARENT_PORT (0) #define HV_SERVICE_PARENT_CONNECTION (0) #define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0) #define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1) #define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2) #define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3) #define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1) #define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2) #define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3) #define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4) #define HV_SERVICE_MAX_MESSAGE_ID (4) #define HV_SERVICE_PROTOCOL_VERSION (0x0010) #define HV_CONNECT_PAYLOAD_BYTE_COUNT 64 /* #define VMBUS_REVISION_NUMBER 6 */ /* Our local vmbus's port and connection id. Anything >0 is fine */ /* #define VMBUS_PORT_ID 11 */ /* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */ static const uuid_le VMBUS_SERVICE_ID = { .b = { 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c, 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4 }, }; struct hv_input_signal_event_buffer { u64 align8; struct hv_input_signal_event event; }; struct hv_context { /* We only support running on top of Hyper-V * So at this point this really can only contain the Hyper-V ID */ u64 guestid; void *hypercall_page; bool synic_initialized; /* * This is used as an input param to HvCallSignalEvent hypercall. The * input param is immutable in our usage and must be dynamic mem (vs * stack or global). */ struct hv_input_signal_event_buffer *signal_event_buffer; /* 8-bytes aligned of the buffer above */ struct hv_input_signal_event *signal_event_param; void *synic_message_page[NR_CPUS]; void *synic_event_page[NR_CPUS]; }; extern struct hv_context hv_context; /* Hv Interface */ extern int hv_init(void); extern void hv_cleanup(void); extern int hv_post_message(union hv_connection_id connection_id, enum hv_message_type message_type, void *payload, size_t payload_size); extern u16 hv_signal_event(void); extern void hv_synic_init(void *irqarg); extern void hv_synic_cleanup(void *arg); /* Interface */ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, u32 buflen); void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info, struct scatterlist *sglist, u32 sgcount); int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer, u32 buflen); int hv_ringbuffer_read(struct hv_ring_buffer_info *ring_info, void *buffer, u32 buflen, u32 offset); u32 hv_get_ringbuffer_interrupt_mask(struct hv_ring_buffer_info *ring_info); void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info, struct hv_ring_buffer_debug_info *debug_info); /* * Maximum channels is determined by the size of the interrupt page * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt * and the other is receive endpoint interrupt */ #define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */ /* The value here must be in multiple of 32 */ /* TODO: Need to make this configurable */ #define MAX_NUM_CHANNELS_SUPPORTED 256 enum vmbus_connect_state { DISCONNECTED, CONNECTING, CONNECTED, DISCONNECTING }; #define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT struct vmbus_connection { enum vmbus_connect_state conn_state; atomic_t next_gpadl_handle; /* * Represents channel interrupts. Each bit position represents a * channel. When a channel sends an interrupt via VMBUS, it finds its * bit in the sendInterruptPage, set it and calls Hv to generate a port * event. The other end receives the port event and parse the * recvInterruptPage to see which bit is set */ void *int_page; void *send_int_page; void *recv_int_page; /* * 2 pages - 1st page for parent->child notification and 2nd * is child->parent notification */ void *monitor_pages; struct list_head chn_msg_list; spinlock_t channelmsg_lock; /* List of channels */ struct list_head chn_list; spinlock_t channel_lock; struct workqueue_struct *work_queue; }; struct vmbus_msginfo { /* Bookkeeping stuff */ struct list_head msglist_entry; /* The message itself */ unsigned char msg[0]; }; extern struct vmbus_connection vmbus_connection; /* General vmbus interface */ struct hv_device *vmbus_device_create(uuid_le *type, uuid_le *instance, struct vmbus_channel *channel); int vmbus_device_register(struct hv_device *child_device_obj); void vmbus_device_unregister(struct hv_device *device_obj); /* static void */ /* VmbusChildDeviceDestroy( */ /* struct hv_device *); */ struct vmbus_channel *relid2channel(u32 relid); void vmbus_free_channels(void); /* Connection interface */ int vmbus_connect(void); int vmbus_post_msg(void *buffer, size_t buflen); int vmbus_set_event(u32 child_relid); void vmbus_on_event(unsigned long data); #endif /* _HYPERV_VMBUS_H */