TdxAcpiTable.c File Reference

#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/QemuFwCfgLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/PcdLib.h>
#include <Library/OrderedCollectionLib.h>
#include <Library/TdxLib.h>
#include <IndustryStandard/Acpi.h>
#include <Protocol/AcpiSystemDescriptionTable.h>
#include <Protocol/AcpiTable.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Library/TdxMailboxLib.h>
#include <Protocol/Cpu.h>
#include <Uefi.h>
#include <TdxAcpiTable.h>

Go to the source code of this file.

Functions
EFI_PHYSICAL_ADDRESS EFIAPI	RelocateMailbox (VOID)
VOID EFIAPI	AlterAcpiTable (IN EFI_EVENT Event, IN VOID *Context)

Detailed Description

OVMF ACPI QEMU support

Copyright (c) 2008 - 2014, Intel Corporation. All rights reserved.

Copyright (C) 2012-2014, Red Hat, Inc.

SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file TdxAcpiTable.c.

Function Documentation

AlterAcpiTable()

VOID EFIAPI AlterAcpiTable	(	IN EFI_EVENT	Event,
		IN VOID *	Context
	)

Alter the MADT when ACPI Table from QEMU is available.

Parameters

[in]	Event	Event whose notification function is being invoked
[in]	Context	Pointer to the notification function's context

Definition at line 129 of file TdxAcpiTable.c.

RelocateMailbox()

EFI_PHYSICAL_ADDRESS EFIAPI RelocateMailbox

(

VOID

)

At the beginning of system boot, a 4K-aligned, 4K-size memory (Td mailbox) is pre-allocated by host VMM. BSP & APs do the page accept together in that memory region.

After that TDVF is designed to relocate the mailbox to a 4K-aligned, 4K-size memory block which is allocated in the ACPI Nvs memory. APs are waken up and spin around the relocated mailbox for further command.

Returns

EFI_PHYSICAL_ADDRESS Address of the relocated mailbox

Definition at line 44 of file TdxAcpiTable.c.