ac0a286f4d
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the OvmfPkg 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: Andrew Fish <afish@apple.com>
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/** @file
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Xen Hypercall Library implementation for Intel architecture
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Copyright (c) 2014, Linaro Ltd. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiDxe.h>
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#include <Library/HobLib.h>
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#include <Library/DebugLib.h>
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#include <Guid/XenInfo.h>
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STATIC VOID *HyperPage;
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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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return HyperPage != NULL;
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}
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//
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// Interface exposed by the ASM implementation of the core hypercall
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//
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INTN
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EFIAPI
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__XenHypercall2 (
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IN VOID *HypercallAddr,
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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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Library constructor: retrieves the Hyperpage address
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from the gEfiXenInfoGuid HOB
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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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EFI_HOB_GUID_TYPE *GuidHob;
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EFI_XEN_INFO *XenInfo;
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GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
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if (GuidHob == NULL) {
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return RETURN_NOT_FOUND;
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}
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XenInfo = (EFI_XEN_INFO *)GET_GUID_HOB_DATA (GuidHob);
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HyperPage = XenInfo->HyperPages;
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return RETURN_SUCCESS;
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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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ASSERT (HyperPage != NULL);
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return __XenHypercall2 ((UINT8 *)HyperPage + HypercallID * 32, Arg1, Arg2);
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}
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