#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <IndustryStandard/Tdx.h>
#include <Uefi/UefiBaseType.h>
#include <Library/TdxLib.h>
#include <Library/BaseMemoryLib.h>

Macros
#define	TDX_ACCEPTPAGE_MAX_RETRIED 3

#define	INVALID_ACCEPT_PAGELEVEL ARRAY_SIZE(mTdxAcceptPageLevelMap)

Functions
UINT32	GetGpaPageLevel (UINT32 PageSize)

EFI_STATUS EFIAPI	TdAcceptPages (IN UINT64 StartAddress, IN UINT64 NumberOfPages, IN UINT32 PageSize)

Variables
UINT64	mNumberOfDuplicatedAcceptedPages

UINT32	mTdxAcceptPageLevelMap [2]

Detailed Description

Unaccepted memory is a special type of private memory. In Td guest TDCALL [TDG.MEM.PAGE.ACCEPT] is invoked to accept the unaccepted memory before use it.

Copyright (c) 2020 - 2021, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file AcceptPages.c.

Macro Definition Documentation

◆ INVALID_ACCEPT_PAGELEVEL

#define INVALID_ACCEPT_PAGELEVEL ARRAY_SIZE(mTdxAcceptPageLevelMap)

Definition at line 30 of file AcceptPages.c.

◆ TDX_ACCEPTPAGE_MAX_RETRIED

#define TDX_ACCEPTPAGE_MAX_RETRIED 3

Definition at line 21 of file AcceptPages.c.

Function Documentation

◆ GetGpaPageLevel()

UINT32 GetGpaPageLevel ( UINT32 PageSize )

This function gets the PageLevel according to the input page size.

Parameters

[in] PageSize Page size

Returns: UINT32 The mapped page level

Definition at line 40 of file AcceptPages.c.

◆ TdAcceptPages()

EFI_STATUS EFIAPI TdAcceptPages	(	IN UINT64	StartAddress,
		IN UINT64	NumberOfPages,
		IN UINT32	PageSize
	)

This function accept a pending private page, and initialize the page to all-0 using the TD ephemeral private key.

Sometimes TDCALL [TDG.MEM.PAGE.ACCEPT] may return TDX_EXIT_REASON_PAGE_SIZE_MISMATCH. It indicates the input PageLevel is not workable. In this case we need to try to fallback to a smaller PageLevel if possible.

Parameters

[in]	StartAddress	Guest physical address of the private page to accept. [63:52] and [11:0] must be 0.
[in]	NumberOfPages	Number of the pages to be accepted.
[in]	PageSize	GPA page size. Only accept 2M/4K size.

Returns: EFI_SUCCESS Accept successfully; others Indicate other errors

Definition at line 74 of file AcceptPages.c.

Variable Documentation

◆ mNumberOfDuplicatedAcceptedPages

UINT64 mNumberOfDuplicatedAcceptedPages

Definition at line 19 of file AcceptPages.c.

◆ mTdxAcceptPageLevelMap

UINT32 mTdxAcceptPageLevelMap[2]

Initial value:

= {
  SIZE_4KB,
  SIZE_2MB
}

Definition at line 25 of file AcceptPages.c.

Macros

Functions

Variables