627 lines
15 KiB
C
627 lines
15 KiB
C
/*
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*
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* Copyright (c) 2011, Microsoft Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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* Authors:
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* Haiyang Zhang <haiyangz@microsoft.com>
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* Hank Janssen <hjanssen@microsoft.com>
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* K. Y. Srinivasan <kys@microsoft.com>
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*
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*/
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#ifndef _HYPERV_VMBUS_H
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#define _HYPERV_VMBUS_H
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#include <linux/list.h>
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#include <asm/sync_bitops.h>
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#include <linux/atomic.h>
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#include <linux/hyperv.h>
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/*
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* The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
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* is set by CPUID(HVCPUID_VERSION_FEATURES).
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*/
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enum hv_cpuid_function {
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HVCPUID_VERSION_FEATURES = 0x00000001,
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HVCPUID_VENDOR_MAXFUNCTION = 0x40000000,
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HVCPUID_INTERFACE = 0x40000001,
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/*
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* The remaining functions depend on the value of
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* HVCPUID_INTERFACE
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*/
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HVCPUID_VERSION = 0x40000002,
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HVCPUID_FEATURES = 0x40000003,
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HVCPUID_ENLIGHTENMENT_INFO = 0x40000004,
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HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005,
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};
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/* Define version of the synthetic interrupt controller. */
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#define HV_SYNIC_VERSION (1)
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/* Define the expected SynIC version. */
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#define HV_SYNIC_VERSION_1 (0x1)
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/* Define synthetic interrupt controller message constants. */
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#define HV_MESSAGE_SIZE (256)
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#define HV_MESSAGE_PAYLOAD_BYTE_COUNT (240)
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#define HV_MESSAGE_PAYLOAD_QWORD_COUNT (30)
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#define HV_ANY_VP (0xFFFFFFFF)
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/* Define synthetic interrupt controller flag constants. */
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#define HV_EVENT_FLAGS_COUNT (256 * 8)
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#define HV_EVENT_FLAGS_BYTE_COUNT (256)
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#define HV_EVENT_FLAGS_DWORD_COUNT (256 / sizeof(u32))
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/* Define hypervisor message types. */
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enum hv_message_type {
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HVMSG_NONE = 0x00000000,
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/* Memory access messages. */
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HVMSG_UNMAPPED_GPA = 0x80000000,
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HVMSG_GPA_INTERCEPT = 0x80000001,
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/* Timer notification messages. */
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HVMSG_TIMER_EXPIRED = 0x80000010,
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/* Error messages. */
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HVMSG_INVALID_VP_REGISTER_VALUE = 0x80000020,
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HVMSG_UNRECOVERABLE_EXCEPTION = 0x80000021,
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HVMSG_UNSUPPORTED_FEATURE = 0x80000022,
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/* Trace buffer complete messages. */
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HVMSG_EVENTLOG_BUFFERCOMPLETE = 0x80000040,
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/* Platform-specific processor intercept messages. */
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HVMSG_X64_IOPORT_INTERCEPT = 0x80010000,
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HVMSG_X64_MSR_INTERCEPT = 0x80010001,
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HVMSG_X64_CPUID_INTERCEPT = 0x80010002,
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HVMSG_X64_EXCEPTION_INTERCEPT = 0x80010003,
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HVMSG_X64_APIC_EOI = 0x80010004,
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HVMSG_X64_LEGACY_FP_ERROR = 0x80010005
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};
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/* Define the number of synthetic interrupt sources. */
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#define HV_SYNIC_SINT_COUNT (16)
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#define HV_SYNIC_STIMER_COUNT (4)
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/* Define invalid partition identifier. */
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#define HV_PARTITION_ID_INVALID ((u64)0x0)
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/* Define connection identifier type. */
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union hv_connection_id {
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u32 asu32;
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struct {
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u32 id:24;
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u32 reserved:8;
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} u;
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};
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/* Define port identifier type. */
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union hv_port_id {
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u32 asu32;
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struct {
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u32 id:24;
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u32 reserved:8;
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} u ;
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};
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/* Define port type. */
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enum hv_port_type {
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HVPORT_MSG = 1,
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HVPORT_EVENT = 2,
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HVPORT_MONITOR = 3
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};
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/* Define port information structure. */
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struct hv_port_info {
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enum hv_port_type port_type;
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u32 padding;
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union {
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struct {
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u32 target_sint;
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u32 target_vp;
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u64 rsvdz;
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} message_port_info;
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struct {
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u32 target_sint;
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u32 target_vp;
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u16 base_flag_bumber;
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u16 flag_count;
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u32 rsvdz;
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} event_port_info;
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struct {
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u64 monitor_address;
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u64 rsvdz;
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} monitor_port_info;
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};
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};
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struct hv_connection_info {
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enum hv_port_type port_type;
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u32 padding;
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union {
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struct {
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u64 rsvdz;
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} message_connection_info;
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struct {
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u64 rsvdz;
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} event_connection_info;
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struct {
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u64 monitor_address;
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} monitor_connection_info;
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};
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};
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/* Define synthetic interrupt controller message flags. */
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union hv_message_flags {
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u8 asu8;
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struct {
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u8 msg_pending:1;
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u8 reserved:7;
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};
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};
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/* Define synthetic interrupt controller message header. */
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struct hv_message_header {
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enum hv_message_type message_type;
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u8 payload_size;
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union hv_message_flags message_flags;
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u8 reserved[2];
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union {
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u64 sender;
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union hv_port_id port;
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};
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};
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/* Define timer message payload structure. */
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struct hv_timer_message_payload {
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u32 timer_index;
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u32 reserved;
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u64 expiration_time; /* When the timer expired */
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u64 delivery_time; /* When the message was delivered */
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};
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/* Define synthetic interrupt controller message format. */
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struct hv_message {
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struct hv_message_header header;
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union {
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u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
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} u ;
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};
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/* Define the number of message buffers associated with each port. */
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#define HV_PORT_MESSAGE_BUFFER_COUNT (16)
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/* Define the synthetic interrupt message page layout. */
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struct hv_message_page {
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struct hv_message sint_message[HV_SYNIC_SINT_COUNT];
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};
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/* Define the synthetic interrupt controller event flags format. */
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union hv_synic_event_flags {
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u8 flags8[HV_EVENT_FLAGS_BYTE_COUNT];
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u32 flags32[HV_EVENT_FLAGS_DWORD_COUNT];
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};
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/* Define the synthetic interrupt flags page layout. */
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struct hv_synic_event_flags_page {
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union hv_synic_event_flags sintevent_flags[HV_SYNIC_SINT_COUNT];
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};
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/* Define SynIC control register. */
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union hv_synic_scontrol {
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u64 as_uint64;
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struct {
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u64 enable:1;
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u64 reserved:63;
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};
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};
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/* Define synthetic interrupt source. */
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union hv_synic_sint {
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u64 as_uint64;
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struct {
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u64 vector:8;
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u64 reserved1:8;
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u64 masked:1;
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u64 auto_eoi:1;
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u64 reserved2:46;
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};
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};
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/* Define the format of the SIMP register */
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union hv_synic_simp {
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u64 as_uint64;
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struct {
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u64 simp_enabled:1;
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u64 preserved:11;
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u64 base_simp_gpa:52;
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};
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};
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/* Define the format of the SIEFP register */
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union hv_synic_siefp {
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u64 as_uint64;
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struct {
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u64 siefp_enabled:1;
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u64 preserved:11;
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u64 base_siefp_gpa:52;
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};
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};
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/* Definitions for the monitored notification facility */
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union hv_monitor_trigger_group {
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u64 as_uint64;
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struct {
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u32 pending;
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u32 armed;
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};
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};
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struct hv_monitor_parameter {
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union hv_connection_id connectionid;
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u16 flagnumber;
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u16 rsvdz;
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};
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union hv_monitor_trigger_state {
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u32 asu32;
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struct {
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u32 group_enable:4;
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u32 rsvdz:28;
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};
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};
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/* struct hv_monitor_page Layout */
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/* ------------------------------------------------------ */
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/* | 0 | TriggerState (4 bytes) | Rsvd1 (4 bytes) | */
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/* | 8 | TriggerGroup[0] | */
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/* | 10 | TriggerGroup[1] | */
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/* | 18 | TriggerGroup[2] | */
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/* | 20 | TriggerGroup[3] | */
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/* | 28 | Rsvd2[0] | */
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/* | 30 | Rsvd2[1] | */
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/* | 38 | Rsvd2[2] | */
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/* | 40 | NextCheckTime[0][0] | NextCheckTime[0][1] | */
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/* | ... | */
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/* | 240 | Latency[0][0..3] | */
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/* | 340 | Rsvz3[0] | */
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/* | 440 | Parameter[0][0] | */
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/* | 448 | Parameter[0][1] | */
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/* | ... | */
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/* | 840 | Rsvd4[0] | */
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/* ------------------------------------------------------ */
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struct hv_monitor_page {
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union hv_monitor_trigger_state trigger_state;
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u32 rsvdz1;
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union hv_monitor_trigger_group trigger_group[4];
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u64 rsvdz2[3];
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s32 next_checktime[4][32];
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u16 latency[4][32];
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u64 rsvdz3[32];
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struct hv_monitor_parameter parameter[4][32];
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u8 rsvdz4[1984];
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};
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/* Declare the various hypercall operations. */
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enum hv_call_code {
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HVCALL_POST_MESSAGE = 0x005c,
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HVCALL_SIGNAL_EVENT = 0x005d,
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};
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/* Definition of the hv_post_message hypercall input structure. */
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struct hv_input_post_message {
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union hv_connection_id connectionid;
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u32 reserved;
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enum hv_message_type message_type;
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u32 payload_size;
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u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
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};
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/* Definition of the hv_signal_event hypercall input structure. */
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struct hv_input_signal_event {
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union hv_connection_id connectionid;
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u16 flag_number;
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u16 rsvdz;
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};
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/*
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* Versioning definitions used for guests reporting themselves to the
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* hypervisor, and visa versa.
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*/
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/* Version info reported by guest OS's */
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enum hv_guest_os_vendor {
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HVGUESTOS_VENDOR_MICROSOFT = 0x0001
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};
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enum hv_guest_os_microsoft_ids {
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HVGUESTOS_MICROSOFT_UNDEFINED = 0x00,
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HVGUESTOS_MICROSOFT_MSDOS = 0x01,
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HVGUESTOS_MICROSOFT_WINDOWS3X = 0x02,
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HVGUESTOS_MICROSOFT_WINDOWS9X = 0x03,
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HVGUESTOS_MICROSOFT_WINDOWSNT = 0x04,
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HVGUESTOS_MICROSOFT_WINDOWSCE = 0x05
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};
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/*
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* Declare the MSR used to identify the guest OS.
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*/
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#define HV_X64_MSR_GUEST_OS_ID 0x40000000
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union hv_x64_msr_guest_os_id_contents {
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u64 as_uint64;
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struct {
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u64 build_number:16;
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u64 service_version:8; /* Service Pack, etc. */
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u64 minor_version:8;
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u64 major_version:8;
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u64 os_id:8; /* enum hv_guest_os_microsoft_ids (if Vendor=MS) */
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u64 vendor_id:16; /* enum hv_guest_os_vendor */
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};
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};
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/*
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* Declare the MSR used to setup pages used to communicate with the hypervisor.
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*/
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#define HV_X64_MSR_HYPERCALL 0x40000001
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union hv_x64_msr_hypercall_contents {
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u64 as_uint64;
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struct {
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u64 enable:1;
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u64 reserved:11;
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u64 guest_physical_address:52;
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};
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};
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enum {
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VMBUS_MESSAGE_CONNECTION_ID = 1,
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VMBUS_MESSAGE_PORT_ID = 1,
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VMBUS_EVENT_CONNECTION_ID = 2,
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VMBUS_EVENT_PORT_ID = 2,
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VMBUS_MONITOR_CONNECTION_ID = 3,
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VMBUS_MONITOR_PORT_ID = 3,
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VMBUS_MESSAGE_SINT = 2,
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};
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/* #defines */
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#define HV_PRESENT_BIT 0x80000000
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#define HV_LINUX_GUEST_ID_LO 0x00000000
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#define HV_LINUX_GUEST_ID_HI 0xB16B00B5
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#define HV_LINUX_GUEST_ID (((u64)HV_LINUX_GUEST_ID_HI << 32) | \
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HV_LINUX_GUEST_ID_LO)
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#define HV_CPU_POWER_MANAGEMENT (1 << 0)
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#define HV_RECOMMENDATIONS_MAX 4
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#define HV_X64_MAX 5
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#define HV_CAPS_MAX 8
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#define HV_HYPERCALL_PARAM_ALIGN sizeof(u64)
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/* Service definitions */
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#define HV_SERVICE_PARENT_PORT (0)
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#define HV_SERVICE_PARENT_CONNECTION (0)
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#define HV_SERVICE_CONNECT_RESPONSE_SUCCESS (0)
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#define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER (1)
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#define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE (2)
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#define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3)
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#define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID (1)
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#define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID (2)
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#define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID (3)
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#define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID (4)
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#define HV_SERVICE_MAX_MESSAGE_ID (4)
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#define HV_SERVICE_PROTOCOL_VERSION (0x0010)
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#define HV_CONNECT_PAYLOAD_BYTE_COUNT 64
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/* #define VMBUS_REVISION_NUMBER 6 */
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/* Our local vmbus's port and connection id. Anything >0 is fine */
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/* #define VMBUS_PORT_ID 11 */
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/* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */
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static const uuid_le VMBUS_SERVICE_ID = {
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.b = {
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0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c,
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0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4
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},
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};
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#define MAX_NUM_CPUS 32
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struct hv_input_signal_event_buffer {
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u64 align8;
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struct hv_input_signal_event event;
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};
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struct hv_context {
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/* We only support running on top of Hyper-V
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* So at this point this really can only contain the Hyper-V ID
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*/
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u64 guestid;
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void *hypercall_page;
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bool synic_initialized;
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/*
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* This is used as an input param to HvCallSignalEvent hypercall. The
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* input param is immutable in our usage and must be dynamic mem (vs
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* stack or global). */
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struct hv_input_signal_event_buffer *signal_event_buffer;
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/* 8-bytes aligned of the buffer above */
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struct hv_input_signal_event *signal_event_param;
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void *synic_message_page[MAX_NUM_CPUS];
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void *synic_event_page[MAX_NUM_CPUS];
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};
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extern struct hv_context hv_context;
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/* Hv Interface */
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extern int hv_init(void);
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extern void hv_cleanup(void);
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extern u16 hv_post_message(union hv_connection_id connection_id,
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enum hv_message_type message_type,
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void *payload, size_t payload_size);
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extern u16 hv_signal_event(void);
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extern void hv_synic_init(void *irqarg);
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extern void hv_synic_cleanup(void *arg);
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/* Interface */
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int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer,
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u32 buflen);
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void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
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int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info,
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struct scatterlist *sglist,
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u32 sgcount);
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int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer,
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u32 buflen);
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int hv_ringbuffer_read(struct hv_ring_buffer_info *ring_info,
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void *buffer,
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u32 buflen,
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u32 offset);
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u32 hv_get_ringbuffer_interrupt_mask(struct hv_ring_buffer_info *ring_info);
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void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
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struct hv_ring_buffer_debug_info *debug_info);
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/*
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* Maximum channels is determined by the size of the interrupt page
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* which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
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* and the other is receive endpoint interrupt
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|
*/
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#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
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|
|
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/* The value here must be in multiple of 32 */
|
|
/* TODO: Need to make this configurable */
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#define MAX_NUM_CHANNELS_SUPPORTED 256
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|
|
|
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enum vmbus_connect_state {
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|
DISCONNECTED,
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|
CONNECTING,
|
|
CONNECTED,
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|
DISCONNECTING
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|
};
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|
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#define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
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|
|
|
struct vmbus_connection {
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|
enum vmbus_connect_state conn_state;
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|
|
|
atomic_t next_gpadl_handle;
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|
|
|
/*
|
|
* 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);
|
|
|
|
|
|
/* 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 */
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