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