723 lines
18 KiB
C
723 lines
18 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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* Timeout for services such as KVP and fcopy.
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*/
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#define HV_UTIL_TIMEOUT 30
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/*
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* Timeout for guest-host handshake for services.
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*/
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#define HV_UTIL_NEGO_TIMEOUT 60
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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 HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE 0x400
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#define HV_X64_MSR_CRASH_P0 0x40000100
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#define HV_X64_MSR_CRASH_P1 0x40000101
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#define HV_X64_MSR_CRASH_P2 0x40000102
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#define HV_X64_MSR_CRASH_P3 0x40000103
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#define HV_X64_MSR_CRASH_P4 0x40000104
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#define HV_X64_MSR_CRASH_CTL 0x40000105
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#define HV_CRASH_CTL_CRASH_NOTIFY (1ULL << 63)
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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 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 invalid partition identifier. */
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#define HV_PARTITION_ID_INVALID ((u64)0x0)
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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_number;
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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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/*
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* Timer configuration register.
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*/
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union hv_timer_config {
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u64 as_uint64;
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struct {
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u64 enable:1;
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u64 periodic:1;
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u64 lazy:1;
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u64 auto_enable:1;
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u64 reserved_z0:12;
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u64 sintx:4;
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u64 reserved_z1:44;
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};
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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 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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/* 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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u32 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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/*
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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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/*
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* The guest OS needs to register the guest ID with the hypervisor.
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* The guest ID is a 64 bit entity and the structure of this ID is
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* specified in the Hyper-V specification:
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*
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* http://msdn.microsoft.com/en-us/library/windows/hardware/ff542653%28v=vs.85%29.aspx
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*
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* While the current guideline does not specify how Linux guest ID(s)
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* need to be generated, our plan is to publish the guidelines for
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* Linux and other guest operating systems that currently are hosted
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* on Hyper-V. The implementation here conforms to this yet
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* unpublished guidelines.
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*
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*
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* Bit(s)
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* 63 - Indicates if the OS is Open Source or not; 1 is Open Source
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* 62:56 - Os Type; Linux is 0x100
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* 55:48 - Distro specific identification
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* 47:16 - Linux kernel version number
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* 15:0 - Distro specific identification
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*
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*
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*/
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#define HV_LINUX_VENDOR_ID 0x8100
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/*
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* Generate the guest ID based on the guideline described above.
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*/
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static inline __u64 generate_guest_id(__u8 d_info1, __u32 kernel_version,
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__u16 d_info2)
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{
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__u64 guest_id = 0;
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guest_id = (((__u64)HV_LINUX_VENDOR_ID) << 48);
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guest_id |= (((__u64)(d_info1)) << 48);
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guest_id |= (((__u64)(kernel_version)) << 16);
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guest_id |= ((__u64)(d_info2));
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return guest_id;
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}
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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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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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void *tsc_page;
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bool synic_initialized;
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void *synic_message_page[NR_CPUS];
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void *synic_event_page[NR_CPUS];
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/*
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* Hypervisor's notion of virtual processor ID is different from
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* Linux' notion of CPU ID. This information can only be retrieved
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* in the context of the calling CPU. Setup a map for easy access
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* to this information:
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*
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* vp_index[a] is the Hyper-V's processor ID corresponding to
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* Linux cpuid 'a'.
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*/
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u32 vp_index[NR_CPUS];
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/*
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* Starting with win8, we can take channel interrupts on any CPU;
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* we will manage the tasklet that handles events messages on a per CPU
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* basis.
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*/
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struct tasklet_struct *event_dpc[NR_CPUS];
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struct tasklet_struct *msg_dpc[NR_CPUS];
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/*
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* To optimize the mapping of relid to channel, maintain
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* per-cpu list of the channels based on their CPU affinity.
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*/
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struct list_head percpu_list[NR_CPUS];
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/*
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* buffer to post messages to the host.
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*/
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void *post_msg_page[NR_CPUS];
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/*
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* Support PV clockevent device.
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*/
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struct clock_event_device *clk_evt[NR_CPUS];
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/*
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* To manage allocations in a NUMA node.
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* Array indexed by numa node ID.
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*/
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struct cpumask *hv_numa_map;
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};
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extern struct hv_context hv_context;
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struct ms_hyperv_tsc_page {
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volatile u32 tsc_sequence;
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u32 reserved1;
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volatile u64 tsc_scale;
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volatile s64 tsc_offset;
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u64 reserved2[509];
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};
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struct hv_ring_buffer_debug_info {
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u32 current_interrupt_mask;
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u32 current_read_index;
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u32 current_write_index;
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u32 bytes_avail_toread;
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u32 bytes_avail_towrite;
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};
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/* Hv Interface */
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extern int hv_init(void);
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extern void hv_cleanup(bool crash);
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extern int 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 int hv_synic_alloc(void);
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extern void hv_synic_free(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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extern void hv_synic_clockevents_cleanup(void);
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/*
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* Host version information.
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*/
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extern unsigned int host_info_eax;
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extern unsigned int host_info_ebx;
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extern unsigned int host_info_ecx;
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extern unsigned int host_info_edx;
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/* Interface */
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int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info,
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struct page *pages, u32 pagecnt);
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void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info);
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int hv_ringbuffer_write(struct vmbus_channel *channel,
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struct kvec *kv_list,
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u32 kv_count, bool lock,
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bool kick_q);
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int hv_ringbuffer_read(struct vmbus_channel *channel,
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void *buffer, u32 buflen, u32 *buffer_actual_len,
|
|
u64 *requestid, bool raw);
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|
|
|
void hv_ringbuffer_get_debuginfo(struct hv_ring_buffer_info *ring_info,
|
|
struct hv_ring_buffer_debug_info *debug_info);
|
|
|
|
void hv_begin_read(struct hv_ring_buffer_info *rbi);
|
|
|
|
u32 hv_end_read(struct hv_ring_buffer_info *rbi);
|
|
|
|
/*
|
|
* 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;
|
|
|
|
struct completion unload_event;
|
|
/*
|
|
* 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
|
|
*/
|
|
struct hv_monitor_page *monitor_pages[2];
|
|
struct list_head chn_msg_list;
|
|
spinlock_t channelmsg_lock;
|
|
|
|
/* List of channels */
|
|
struct list_head chn_list;
|
|
struct mutex channel_mutex;
|
|
|
|
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;
|
|
|
|
enum vmbus_message_handler_type {
|
|
/* The related handler can sleep. */
|
|
VMHT_BLOCKING = 0,
|
|
|
|
/* The related handler must NOT sleep. */
|
|
VMHT_NON_BLOCKING = 1,
|
|
};
|
|
|
|
struct vmbus_channel_message_table_entry {
|
|
enum vmbus_channel_message_type message_type;
|
|
enum vmbus_message_handler_type handler_type;
|
|
void (*message_handler)(struct vmbus_channel_message_header *msg);
|
|
};
|
|
|
|
extern struct vmbus_channel_message_table_entry
|
|
channel_message_table[CHANNELMSG_COUNT];
|
|
|
|
/* Free the message slot and signal end-of-message if required */
|
|
static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
|
|
{
|
|
/*
|
|
* On crash we're reading some other CPU's message page and we need
|
|
* to be careful: this other CPU may already had cleared the header
|
|
* and the host may already had delivered some other message there.
|
|
* In case we blindly write msg->header.message_type we're going
|
|
* to lose it. We can still lose a message of the same type but
|
|
* we count on the fact that there can only be one
|
|
* CHANNELMSG_UNLOAD_RESPONSE and we don't care about other messages
|
|
* on crash.
|
|
*/
|
|
if (cmpxchg(&msg->header.message_type, old_msg_type,
|
|
HVMSG_NONE) != old_msg_type)
|
|
return;
|
|
|
|
/*
|
|
* Make sure the write to MessageType (ie set to
|
|
* HVMSG_NONE) happens before we read the
|
|
* MessagePending and EOMing. Otherwise, the EOMing
|
|
* will not deliver any more messages since there is
|
|
* no empty slot
|
|
*/
|
|
mb();
|
|
|
|
if (msg->header.message_flags.msg_pending) {
|
|
/*
|
|
* This will cause message queue rescan to
|
|
* possibly deliver another msg from the
|
|
* hypervisor
|
|
*/
|
|
wrmsrl(HV_X64_MSR_EOM, 0);
|
|
}
|
|
}
|
|
|
|
/* General vmbus interface */
|
|
|
|
struct hv_device *vmbus_device_create(const uuid_le *type,
|
|
const 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);
|
|
void vmbus_disconnect(void);
|
|
|
|
int vmbus_post_msg(void *buffer, size_t buflen, bool can_sleep);
|
|
|
|
void vmbus_on_event(unsigned long data);
|
|
void vmbus_on_msg_dpc(unsigned long data);
|
|
|
|
int hv_kvp_init(struct hv_util_service *);
|
|
void hv_kvp_deinit(void);
|
|
void hv_kvp_onchannelcallback(void *);
|
|
|
|
int hv_vss_init(struct hv_util_service *);
|
|
void hv_vss_deinit(void);
|
|
void hv_vss_onchannelcallback(void *);
|
|
|
|
int hv_fcopy_init(struct hv_util_service *);
|
|
void hv_fcopy_deinit(void);
|
|
void hv_fcopy_onchannelcallback(void *);
|
|
void vmbus_initiate_unload(bool crash);
|
|
|
|
static inline void hv_poll_channel(struct vmbus_channel *channel,
|
|
void (*cb)(void *))
|
|
{
|
|
if (!channel)
|
|
return;
|
|
|
|
smp_call_function_single(channel->target_cpu, cb, channel, true);
|
|
}
|
|
|
|
enum hvutil_device_state {
|
|
HVUTIL_DEVICE_INIT = 0, /* driver is loaded, waiting for userspace */
|
|
HVUTIL_READY, /* userspace is registered */
|
|
HVUTIL_HOSTMSG_RECEIVED, /* message from the host was received */
|
|
HVUTIL_USERSPACE_REQ, /* request to userspace was sent */
|
|
HVUTIL_USERSPACE_RECV, /* reply from userspace was received */
|
|
HVUTIL_DEVICE_DYING, /* driver unload is in progress */
|
|
};
|
|
|
|
#endif /* _HYPERV_VMBUS_H */
|