X86XenHypercall.c File Reference

#include <PiDxe.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/CpuLib.h>

Go to the source code of this file.

Functions
INTN EFIAPI	__XenVmmcall2 (IN INTN HypercallNum, IN OUT INTN Arg1, IN OUT INTN Arg2)
INTN EFIAPI	__XenVmcall2 (IN INTN HypercallNum, IN OUT INTN Arg1, IN OUT INTN Arg2)
BOOLEAN EFIAPI	XenHypercallIsAvailable (VOID)
STATIC UINT32	XenCpuidLeaf (VOID)
RETURN_STATUS EFIAPI	XenHypercallLibInit (VOID)
INTN EFIAPI	XenHypercall2 (IN UINTN HypercallID, IN OUT INTN Arg1, IN OUT INTN Arg2)

Detailed Description

Xen Hypercall Library implementation for Intel architecture

Copyright (c) 2014, Linaro Ltd. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file X86XenHypercall.c.

Function Documentation

XenCpuidLeaf()

STATIC UINT32 XenCpuidLeaf

(

VOID

)

Definition at line 57 of file X86XenHypercall.c.

XenHypercall2()

INTN EFIAPI XenHypercall2	(	IN UINTN	HypercallID,
		IN OUT INTN	Arg1,
		IN OUT INTN	Arg2
	)

This function will put the two arguments in the right place (registers) and invoke the hypercall identified by HypercallID.

Parameters

HypercallID	The symbolic ID of the hypercall to be invoked
Arg1	First argument.
Arg2	Second argument.

Returns

Return 0 if success otherwise it return an errno.

Definition at line 141 of file X86XenHypercall.c.

XenHypercallIsAvailable()

BOOLEAN EFIAPI XenHypercallIsAvailable

(

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.

Return values

TRUE	Hypercalls are available.
FALSE	Hypercalls are not available.

Definition at line 48 of file X86XenHypercall.c.

XenHypercallLibInit()

RETURN_STATUS EFIAPI XenHypercallLibInit

(

VOID

)

Library constructor: Check for Xen leaf in CPUID

Definition at line 87 of file X86XenHypercall.c.