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Diffstat (limited to 'include/iprt/nt/vid.h')
| -rw-r--r-- | include/iprt/nt/vid.h | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/include/iprt/nt/vid.h b/include/iprt/nt/vid.h new file mode 100644 index 00000000..fdf03526 --- /dev/null +++ b/include/iprt/nt/vid.h @@ -0,0 +1,273 @@ +/** @file + * Virtualization Infrastructure Driver (VID) API. + */ + +/* + * Copyright (C) 2018-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + +#ifndef IPRT_INCLUDED_nt_vid_h +#define IPRT_INCLUDED_nt_vid_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include "hyperv.h" + + +/** + * Output from VidMessageSlotMap. + */ +typedef struct VID_MAPPED_MESSAGE_SLOT +{ + /** The message block mapping. */ + struct _HV_MESSAGE *pMsgBlock; + /** Copy of input iCpu. */ + uint32_t iCpu; + /** Explicit padding. */ + uint32_t uParentAdvisory; +} VID_MAPPED_MESSAGE_SLOT; +/** Pointer to VidMessageSlotMap output structure. */ +typedef VID_MAPPED_MESSAGE_SLOT *PVID_MAPPED_MESSAGE_SLOT; + + +/** @name VID_MESSAGE_MAPPING_HEADER::enmVidMsgType values (wild guess). + * @{ */ +/** Type mask, strips flags. */ +#define VID_MESSAGE_TYPE_MASK UINT32_C(0x00ffffff) +/** No return message necessary. */ +#define VID_MESSAGE_TYPE_FLAG_NO_RETURN UINT32_C(0x01000000) +/** Observed message values. */ +typedef enum +{ + /** Invalid zero value. */ + VidMessageInvalid = 0, + /** Guessing this means a message from the hypervisor. */ + VidMessageHypervisorMessage = 0x00000c | VID_MESSAGE_TYPE_FLAG_NO_RETURN, + /** Guessing this means stop request completed. Message length is 1 byte. */ + VidMessageStopRequestComplete = 0x00000d | VID_MESSAGE_TYPE_FLAG_NO_RETURN, +} VID_MESSAGE_TYPE; +AssertCompileSize(VID_MESSAGE_TYPE, 4); +/** @} */ + +/** + * Header of the message mapping returned by VidMessageSlotMap. + */ +typedef struct VID_MESSAGE_MAPPING_HEADER +{ + /** Current guess is that this is VID_MESSAGE_TYPE. */ + VID_MESSAGE_TYPE enmVidMsgType; + /** The message size or so it seems (0x100). */ + uint32_t cbMessage; + /** So far these have been zero. */ + uint32_t aZeroPPadding[2+4]; +} VID_MESSAGE_MAPPING_HEADER; +AssertCompileSize(VID_MESSAGE_MAPPING_HEADER, 32); + +/** + * VID processor status (VidGetVirtualProcessorRunningStatus). + * + * @note This is used internally in VID.SYS, in 17101 it's at offset 8 in their + * 'pVCpu' structure. + */ +typedef enum +{ + VidProcessorStatusStopped = 0, + VidProcessorStatusRunning, + VidProcessorStatusSuspended, + VidProcessorStatusUndefined = 0xffff +} VID_PROCESSOR_STATUS; +AssertCompileSize(VID_PROCESSOR_STATUS, 4); + + +/** I/O control input for VidMessageSlotHandleAndGetNext. */ +typedef struct VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT +{ + HV_VP_INDEX iCpu; + uint32_t fFlags; /**< VID_MSHAGN_F_GET_XXX*/ + uint32_t cMillies; /**< Not present in build 17758 as the API changed to always to infinite waits. */ +} VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT; +/** Pointer to input for VidMessageSlotHandleAndGetNext. */ +typedef VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT *PVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT; +/** Pointer to const input for VidMessageSlotHandleAndGetNext. */ +typedef VID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT const *PCVID_IOCTL_INPUT_MESSAGE_SLOT_HANDLE_AND_GET_NEXT; + +/** @name VID_MSHAGN_F_GET_XXX - Flags for VidMessageSlotHandleAndGetNext + * @{ */ +/** This will try get the next message, waiting if necessary. + * It is subject to NtAlertThread processing when it starts waiting. */ +#define VID_MSHAGN_F_GET_NEXT_MESSAGE RT_BIT_32(0) +/** ACK the message as handled and resume execution/whatever. + * This is executed before VID_MSHAGN_F_GET_NEXT_MESSAGE and should not be + * subject to NtAlertThread side effects. */ +#define VID_MSHAGN_F_HANDLE_MESSAGE RT_BIT_32(1) +/** Cancel VP execution (no other bit set). + * @since about build 17758. */ +#define VID_MSHAGN_F_CANCEL RT_BIT_32(2) +/** @} */ + + +#ifdef IN_RING3 +RT_C_DECLS_BEGIN + +/** Calling convention. */ +#ifndef WINAPI +# define VIDAPI __stdcall +#else +# define VIDAPI WINAPI +#endif + +/** Partition handle. */ +#ifndef WINAPI +typedef void *VID_PARTITION_HANDLE; +#else +typedef HANDLE VID_PARTITION_HANDLE; +#endif + +/** + * Gets the partition ID. + * + * The partition ID is the numeric identifier used when making hypercalls to the + * hypervisor. + */ +DECLIMPORT(BOOL) VIDAPI VidGetHvPartitionId(VID_PARTITION_HANDLE hPartition, HV_PARTITION_ID *pidPartition); + +/** + * Starts asynchronous execution of a virtual CPU. + */ +DECLIMPORT(BOOL) VIDAPI VidStartVirtualProcessor(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu); + +/** + * Stops the asynchronous execution of a virtual CPU. + * + * @retval ERROR_VID_STOP_PENDING if busy with intercept, check messages. + */ +DECLIMPORT(BOOL) VIDAPI VidStopVirtualProcessor(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu); + +/** + * WHvCreateVirtualProcessor boils down to a call to VidMessageSlotMap and + * some internal WinHvPlatform state fiddling. + * + * Looks like it maps memory and returns the pointer to it. + * VidMessageSlotHandleAndGetNext is later used to wait for the next message and + * put (??) it into that memory mapping. + * + * @returns Success indicator (details in LastErrorValue). + * + * @param hPartition The partition handle. + * @param pOutput Where to return the pointer to the message memory + * mapping. The CPU index is also returned here. + * @param iCpu The CPU to wait-and-get messages for. + */ +DECLIMPORT(BOOL) VIDAPI VidMessageSlotMap(VID_PARTITION_HANDLE hPartition, PVID_MAPPED_MESSAGE_SLOT pOutput, HV_VP_INDEX iCpu); + +/** + * This is used by WHvRunVirtualProcessor to wait for the next exit msg. + * + * The message appears in the memory mapping returned by VidMessageSlotMap. + * + * @returns Success indicator (details only in LastErrorValue - LastStatusValue + * is not set). + * @retval STATUS_TIMEOUT for STATUS_TIMEOUT as well as STATUS_USER_APC and + * STATUS_ALERTED. + * + * @param hPartition The partition handle. + * @param iCpu The CPU to wait-and-get messages for. + * @param fFlags Flags, VID_MSHAGN_F_XXX. + * + * When starting or resuming execution, at least one of + * VID_MSHAGN_F_GET_NEXT_MESSAGE (bit 0) and + * VID_MSHAGN_F_HANDLE_MESSAGE (bit 1) must be set. + * + * When cancelling execution only VID_MSHAGN_F_CANCEL (big 2) + * must be set. + * + * @param cMillies The timeout, presumably in milliseconds. This parameter + * was dropped about build 17758. + * + * @todo Would be awfully nice if someone at Microsoft could hit at the + * flags here. + */ +DECLIMPORT(BOOL) VIDAPI VidMessageSlotHandleAndGetNext(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu, + uint32_t fFlags, uint32_t cMillies); +/** + * Gets the processor running status. + * + * This is probably only available in special builds, as one of the early I/O + * control dispatching routines will not let it thru. Lower down routines does + * implement it, so it's possible to patch it into working. This works for + * build 17101: eb vid+12180 0f 84 98 00 00 00 + * + * @retval ERROR_NOT_IMPLEMENTED + * + * @remarks VidExoFastIoControlPartition probably disapproves of this too. It + * could be very handy for debugging upon occation. + */ +DECLIMPORT(BOOL) VIDAPI VidGetVirtualProcessorRunningStatus(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu, + VID_PROCESSOR_STATUS *penmStatus); + +/** + * For query virtual processor registers and other state information. + * + * @returns Success indicator (details in LastErrorValue). + */ +DECLIMPORT(BOOL) VIDAPI VidGetVirtualProcessorState(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu, + HV_REGISTER_NAME const *paRegNames, uint32_t cRegisters, + HV_REGISTER_VALUE *paRegValues); + +/** + * For setting virtual processor registers and other state information. + * + * @returns Success indicator (details in LastErrorValue). + */ +DECLIMPORT(BOOL) VIDAPI VidSetVirtualProcessorState(VID_PARTITION_HANDLE hPartition, HV_VP_INDEX iCpu, + HV_REGISTER_NAME const *paRegNames, uint32_t cRegisters, + HV_REGISTER_VALUE const *paRegValues); + +/** + * Wrapper around the HvCallGetMemoryBalance hypercall. + * + * When VID.SYS processes the request, it will also query + * HvPartitionPropertyVirtualTlbPageCount, so we're passing a 3rd return + * parameter in case the API is ever extended to match the I/O control. + * + * @returns Success indicator (details in LastErrorValue). + * @retval ERROR_NOT_IMPLEMENTED for exo partitions. + * + * @param hPartition The partition handle. + * @param pcPagesAvailable Where to return the number of unused pages + * still available to the partition. + * @param pcPagesInUse Where to return the number of pages currently + * in use by the partition. + * @param pReserved Pointer to dummy value, just in case they + * modify the API to include the nested TLB size. + * + * @note Not available for exo partitions, unfortunately. The + * VidExoFastIoControlPartition function deflects it, failing it with + * STATUS_NOT_IMPLEMENTED / ERROR_NOT_IMPLEMENTED. + */ +DECLIMPORT(BOOL) VIDAPI VidGetHvMemoryBalance(VID_PARTITION_HANDLE hPartition, uint64_t *pcPagesAvailable, + uint64_t *pcPagesInUse, uint64_t *pReserved); + +RT_C_DECLS_END +#endif /* IN_RING3 */ + +#endif /* !IPRT_INCLUDED_nt_vid_h */ + |