053e878bfb
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the UefiCpuPkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Ray Ni <ray.ni@intel.com>
166 lines
4.4 KiB
C
166 lines
4.4 KiB
C
/** @file
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VMGEXIT Base Support Library.
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Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Base.h>
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#include <Uefi.h>
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#include <Library/VmgExitLib.h>
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/**
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Perform VMGEXIT.
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Sets the necessary fields of the GHCB, invokes the VMGEXIT instruction and
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then handles the return actions.
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The base library function returns an error in the form of a
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GHCB_EVENT_INJECTION representing a GP_EXCEPTION.
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@param[in, out] Ghcb A pointer to the GHCB
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@param[in] ExitCode VMGEXIT code to be assigned to the SwExitCode
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field of the GHCB.
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@param[in] ExitInfo1 VMGEXIT information to be assigned to the
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SwExitInfo1 field of the GHCB.
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@param[in] ExitInfo2 VMGEXIT information to be assigned to the
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SwExitInfo2 field of the GHCB.
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@retval 0 VMGEXIT succeeded.
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@return Exception number to be propagated, VMGEXIT
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processing did not succeed.
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**/
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UINT64
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EFIAPI
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VmgExit (
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IN OUT GHCB *Ghcb,
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IN UINT64 ExitCode,
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IN UINT64 ExitInfo1,
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IN UINT64 ExitInfo2
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)
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{
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GHCB_EVENT_INJECTION Event;
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Event.Uint64 = 0;
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Event.Elements.Vector = GP_EXCEPTION;
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Event.Elements.Type = GHCB_EVENT_INJECTION_TYPE_EXCEPTION;
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Event.Elements.Valid = 1;
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return Event.Uint64;
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}
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/**
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Perform pre-VMGEXIT initialization/preparation.
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Performs the necessary steps in preparation for invoking VMGEXIT. Must be
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called before setting any fields within the GHCB.
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@param[in, out] Ghcb A pointer to the GHCB
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@param[in, out] InterruptState A pointer to hold the current interrupt
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state, used for restoring in VmgDone ()
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**/
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VOID
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EFIAPI
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VmgInit (
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IN OUT GHCB *Ghcb,
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IN OUT BOOLEAN *InterruptState
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)
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{
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}
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/**
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Perform post-VMGEXIT cleanup.
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Performs the necessary steps to cleanup after invoking VMGEXIT. Must be
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called after obtaining needed fields within the GHCB.
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@param[in, out] Ghcb A pointer to the GHCB
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@param[in] InterruptState An indicator to conditionally (re)enable
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interrupts
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**/
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VOID
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EFIAPI
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VmgDone (
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IN OUT GHCB *Ghcb,
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IN BOOLEAN InterruptState
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)
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{
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}
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/**
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Marks a field at the specified offset as valid in the GHCB.
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The ValidBitmap area represents the areas of the GHCB that have been marked
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valid. Set the bit in ValidBitmap for the input offset.
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@param[in, out] Ghcb Pointer to the Guest-Hypervisor Communication Block
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@param[in] Offset Qword offset in the GHCB to mark valid
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**/
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VOID
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EFIAPI
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VmgSetOffsetValid (
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IN OUT GHCB *Ghcb,
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IN GHCB_REGISTER Offset
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)
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{
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}
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/**
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Checks if a specified offset is valid in the GHCB.
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The ValidBitmap area represents the areas of the GHCB that have been marked
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valid. Return whether the bit in the ValidBitmap is set for the input offset.
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@param[in] Ghcb A pointer to the GHCB
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@param[in] Offset Qword offset in the GHCB to mark valid
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@retval TRUE Offset is marked valid in the GHCB
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@retval FALSE Offset is not marked valid in the GHCB
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**/
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BOOLEAN
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EFIAPI
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VmgIsOffsetValid (
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IN GHCB *Ghcb,
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IN GHCB_REGISTER Offset
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)
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{
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return FALSE;
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}
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/**
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Handle a #VC exception.
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Performs the necessary processing to handle a #VC exception.
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The base library function returns an error equal to VC_EXCEPTION,
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to be propagated to the standard exception handling stack.
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@param[in, out] ExceptionType Pointer to an EFI_EXCEPTION_TYPE to be set
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as value to use on error.
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@param[in, out] SystemContext Pointer to EFI_SYSTEM_CONTEXT
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@retval EFI_SUCCESS Exception handled
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@retval EFI_UNSUPPORTED #VC not supported, (new) exception value to
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propagate provided
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@retval EFI_PROTOCOL_ERROR #VC handling failed, (new) exception value to
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propagate provided
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**/
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EFI_STATUS
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EFIAPI
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VmgExitHandleVc (
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IN OUT EFI_EXCEPTION_TYPE *ExceptionType,
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IN OUT EFI_SYSTEM_CONTEXT SystemContext
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)
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{
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*ExceptionType = VC_EXCEPTION;
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return EFI_UNSUPPORTED;
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}
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