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105 lines
2.4 KiB
C
105 lines
2.4 KiB
C
/** @file
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Functions declarations to make Xen hypercalls.
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Copyright (C) 2014, Citrix Ltd.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __XEN_HYPERCALL_LIB_H__
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#define __XEN_HYPERCALL_LIB_H__
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/**
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To call when the gEfiXenInfoGuid HOB became available after the library init
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function has already been executed.
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This allow to make hypercall in the PEIM stage.
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**/
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RETURN_STATUS
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EFIAPI
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XenHypercallLibInit (
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VOID
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);
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/**
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Check if the Xen Hypercall library is able to make calls to the Xen
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hypervisor.
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Client code should call further functions in this library only if, and after,
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this function returns TRUE.
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@retval TRUE Hypercalls are available.
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@retval FALSE Hypercalls are not available.
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**/
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BOOLEAN
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EFIAPI
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XenHypercallIsAvailable (
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VOID
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);
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/**
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This function will put the two arguments in the right place (registers) and
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invoke the hypercall identified by HypercallID.
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@param HypercallID The symbolic ID of the hypercall to be invoked
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@param Arg1 First argument.
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@param Arg2 Second argument.
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@return Return 0 if success otherwise it return an errno.
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**/
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INTN
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EFIAPI
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XenHypercall2 (
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IN UINTN HypercallID,
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IN OUT INTN Arg1,
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IN OUT INTN Arg2
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);
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/**
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Return the value of the HVM parameter Index.
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@param Index The parameter to get, e.g. HVM_PARAM_STORE_EVTCHN.
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@return The value of the asked parameter or 0 in case of error.
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**/
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UINT64
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EFIAPI
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XenHypercallHvmGetParam (
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UINT32 Index
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);
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/**
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Hypercall to do different operation on the memory.
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@param Operation The operation number, e.g. XENMEM_add_to_physmap.
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@param Arguments The arguments associated to the operation.
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@return Return the return value from the hypercall, 0 in case of success
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otherwise, an error code.
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**/
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INTN
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EFIAPI
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XenHypercallMemoryOp (
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IN UINTN Operation,
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IN OUT VOID *Arguments
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);
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/**
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Do an operation on the event channels.
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@param Operation The operation number, e.g. EVTCHNOP_send.
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@param Arguments The argument associated to the operation.
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@return Return the return value from the hypercall, 0 in case of success
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otherwise, an error code.
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**/
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INTN
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EFIAPI
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XenHypercallEventChannelOp (
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IN INTN Operation,
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IN OUT VOID *Arguments
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);
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#endif
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