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audk/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c

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/** @file
Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php.
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "DmaProtection.h"
/**
Create extended context entry.
@param[in] VtdIndex The index of the VTd engine.
@retval EFI_SUCCESS The extended context entry is created.
@retval EFI_OUT_OF_RESOURCE No enough resource to create extended context entry.
**/
EFI_STATUS
CreateExtContextEntry (
IN UINTN VtdIndex
);
/**
Allocate zero pages.
@param[in] Pages the number of pages.
@return the page address.
@retval NULL No resource to allocate pages.
**/
VOID *
EFIAPI
AllocateZeroPages (
IN UINTN Pages
)
{
VOID *Addr;
Addr = AllocatePages (Pages);
if (Addr == NULL) {
return NULL;
}
ZeroMem (Addr, EFI_PAGES_TO_SIZE(Pages));
return Addr;
}
/**
Set second level paging entry attribute based upon IoMmuAccess.
@param[in] PtEntry The paging entry.
@param[in] IoMmuAccess The IOMMU access.
**/
VOID
SetSecondLevelPagingEntryAttribute (
IN VTD_SECOND_LEVEL_PAGING_ENTRY *PtEntry,
IN UINT64 IoMmuAccess
)
{
PtEntry->Bits.Read = ((IoMmuAccess & EDKII_IOMMU_ACCESS_READ) != 0);
PtEntry->Bits.Write = ((IoMmuAccess & EDKII_IOMMU_ACCESS_WRITE) != 0);
}
/**
Create context entry.
@param[in] VtdIndex The index of the VTd engine.
@retval EFI_SUCCESS The context entry is created.
@retval EFI_OUT_OF_RESOURCE No enough resource to create context entry.
**/
EFI_STATUS
CreateContextEntry (
IN UINTN VtdIndex
)
{
UINTN Index;
VOID *Buffer;
UINTN RootPages;
UINTN ContextPages;
VTD_ROOT_ENTRY *RootEntry;
VTD_CONTEXT_ENTRY *ContextEntryTable;
VTD_CONTEXT_ENTRY *ContextEntry;
VTD_SOURCE_ID *PciSourceId;
VTD_SOURCE_ID SourceId;
UINTN MaxBusNumber;
UINTN EntryTablePages;
MaxBusNumber = 0;
for (Index = 0; Index < mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceDataNumber; Index++) {
PciSourceId = &mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceData[Index].PciSourceId;
if (PciSourceId->Bits.Bus > MaxBusNumber) {
MaxBusNumber = PciSourceId->Bits.Bus;
}
}
DEBUG ((DEBUG_INFO," MaxBusNumber - 0x%x\n", MaxBusNumber));
RootPages = EFI_SIZE_TO_PAGES (sizeof (VTD_ROOT_ENTRY) * VTD_ROOT_ENTRY_NUMBER);
ContextPages = EFI_SIZE_TO_PAGES (sizeof (VTD_CONTEXT_ENTRY) * VTD_CONTEXT_ENTRY_NUMBER);
EntryTablePages = RootPages + ContextPages * (MaxBusNumber + 1);
Buffer = AllocateZeroPages (EntryTablePages);
if (Buffer == NULL) {
DEBUG ((DEBUG_INFO,"Could not Alloc Root Entry Table.. \n"));
return EFI_OUT_OF_RESOURCES;
}
mVtdUnitInformation[VtdIndex].RootEntryTable = (VTD_ROOT_ENTRY *)Buffer;
Buffer = (UINT8 *)Buffer + EFI_PAGES_TO_SIZE (RootPages);
for (Index = 0; Index < mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceDataNumber; Index++) {
PciSourceId = &mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceData[Index].PciSourceId;
SourceId.Bits.Bus = PciSourceId->Bits.Bus;
SourceId.Bits.Device = PciSourceId->Bits.Device;
SourceId.Bits.Function = PciSourceId->Bits.Function;
RootEntry = &mVtdUnitInformation[VtdIndex].RootEntryTable[SourceId.Index.RootIndex];
if (RootEntry->Bits.Present == 0) {
RootEntry->Bits.ContextTablePointerLo = (UINT32) RShiftU64 ((UINT64)(UINTN)Buffer, 12);
RootEntry->Bits.ContextTablePointerHi = (UINT32) RShiftU64 ((UINT64)(UINTN)Buffer, 32);
RootEntry->Bits.Present = 1;
Buffer = (UINT8 *)Buffer + EFI_PAGES_TO_SIZE (ContextPages);
}
ContextEntryTable = (VTD_CONTEXT_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(RootEntry->Bits.ContextTablePointerLo, RootEntry->Bits.ContextTablePointerHi) ;
ContextEntry = &ContextEntryTable[SourceId.Index.ContextIndex];
ContextEntry->Bits.TranslationType = 0;
ContextEntry->Bits.FaultProcessingDisable = 0;
ContextEntry->Bits.Present = 0;
DEBUG ((DEBUG_INFO,"Source: S%04x B%02x D%02x F%02x\n", mVtdUnitInformation[VtdIndex].Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
switch (mVtdUnitInformation[VtdIndex].CapReg.Bits.SAGAW) {
case BIT1:
ContextEntry->Bits.AddressWidth = 0x1;
break;
case BIT2:
ContextEntry->Bits.AddressWidth = 0x2;
break;
}
}
FlushPageTableMemory (VtdIndex, (UINTN)mVtdUnitInformation[VtdIndex].RootEntryTable, EFI_PAGES_TO_SIZE(EntryTablePages));
return EFI_SUCCESS;
}
/**
Create second level paging entry table.
@param[in] VtdIndex The index of the VTd engine.
@param[in] SecondLevelPagingEntry The second level paging entry.
@param[in] MemoryBase The base of the memory.
@param[in] MemoryLimit The limit of the memory.
@param[in] IoMmuAccess The IOMMU access.
@return The second level paging entry.
**/
VTD_SECOND_LEVEL_PAGING_ENTRY *
CreateSecondLevelPagingEntryTable (
IN UINTN VtdIndex,
IN VTD_SECOND_LEVEL_PAGING_ENTRY *SecondLevelPagingEntry,
IN UINT64 MemoryBase,
IN UINT64 MemoryLimit,
IN UINT64 IoMmuAccess
)
{
UINTN Index4;
UINTN Index3;
UINTN Index2;
UINTN Lvl4Start;
UINTN Lvl4End;
UINTN Lvl3Start;
UINTN Lvl3End;
VTD_SECOND_LEVEL_PAGING_ENTRY *Lvl4PtEntry;
VTD_SECOND_LEVEL_PAGING_ENTRY *Lvl3PtEntry;
VTD_SECOND_LEVEL_PAGING_ENTRY *Lvl2PtEntry;
UINT64 BaseAddress;
UINT64 EndAddress;
if (MemoryLimit == 0) {
return EFI_SUCCESS;
}
BaseAddress = ALIGN_VALUE_LOW(MemoryBase, SIZE_2MB);
EndAddress = ALIGN_VALUE_UP(MemoryLimit, SIZE_2MB);
DEBUG ((DEBUG_INFO,"CreateSecondLevelPagingEntryTable: BaseAddress - 0x%016lx, EndAddress - 0x%016lx\n", BaseAddress, EndAddress));
if (SecondLevelPagingEntry == NULL) {
SecondLevelPagingEntry = AllocateZeroPages (1);
if (SecondLevelPagingEntry == NULL) {
DEBUG ((DEBUG_ERROR,"Could not Alloc LVL4 PT. \n"));
return NULL;
}
FlushPageTableMemory (VtdIndex, (UINTN)SecondLevelPagingEntry, EFI_PAGES_TO_SIZE(1));
}
//
// If no access is needed, just create not present entry.
//
if (IoMmuAccess == 0) {
return SecondLevelPagingEntry;
}
Lvl4Start = RShiftU64 (BaseAddress, 39) & 0x1FF;
Lvl4End = RShiftU64 (EndAddress - 1, 39) & 0x1FF;
DEBUG ((DEBUG_INFO," Lvl4Start - 0x%x, Lvl4End - 0x%x\n", Lvl4Start, Lvl4End));
Lvl4PtEntry = (VTD_SECOND_LEVEL_PAGING_ENTRY *)SecondLevelPagingEntry;
for (Index4 = Lvl4Start; Index4 <= Lvl4End; Index4++) {
if (Lvl4PtEntry[Index4].Uint64 == 0) {
Lvl4PtEntry[Index4].Uint64 = (UINT64)(UINTN)AllocateZeroPages (1);
if (Lvl4PtEntry[Index4].Uint64 == 0) {
DEBUG ((DEBUG_ERROR,"!!!!!! ALLOCATE LVL4 PAGE FAIL (0x%x)!!!!!!\n", Index4));
ASSERT(FALSE);
return NULL;
}
FlushPageTableMemory (VtdIndex, (UINTN)Lvl4PtEntry[Index4].Uint64, SIZE_4KB);
SetSecondLevelPagingEntryAttribute (&Lvl4PtEntry[Index4], EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE);
}
Lvl3Start = RShiftU64 (BaseAddress, 30) & 0x1FF;
if (ALIGN_VALUE_LOW(BaseAddress + SIZE_1GB, SIZE_1GB) <= EndAddress) {
Lvl3End = SIZE_4KB/sizeof(VTD_SECOND_LEVEL_PAGING_ENTRY) - 1;
} else {
Lvl3End = RShiftU64 (EndAddress - 1, 30) & 0x1FF;
}
DEBUG ((DEBUG_INFO," Lvl4(0x%x): Lvl3Start - 0x%x, Lvl3End - 0x%x\n", Index4, Lvl3Start, Lvl3End));
Lvl3PtEntry = (VTD_SECOND_LEVEL_PAGING_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(Lvl4PtEntry[Index4].Bits.AddressLo, Lvl4PtEntry[Index4].Bits.AddressHi);
for (Index3 = Lvl3Start; Index3 <= Lvl3End; Index3++) {
if (Lvl3PtEntry[Index3].Uint64 == 0) {
Lvl3PtEntry[Index3].Uint64 = (UINT64)(UINTN)AllocateZeroPages (1);
if (Lvl3PtEntry[Index3].Uint64 == 0) {
DEBUG ((DEBUG_ERROR,"!!!!!! ALLOCATE LVL3 PAGE FAIL (0x%x, 0x%x)!!!!!!\n", Index4, Index3));
ASSERT(FALSE);
return NULL;
}
FlushPageTableMemory (VtdIndex, (UINTN)Lvl3PtEntry[Index3].Uint64, SIZE_4KB);
SetSecondLevelPagingEntryAttribute (&Lvl3PtEntry[Index3], EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE);
}
Lvl2PtEntry = (VTD_SECOND_LEVEL_PAGING_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(Lvl3PtEntry[Index3].Bits.AddressLo, Lvl3PtEntry[Index3].Bits.AddressHi);
for (Index2 = 0; Index2 < SIZE_4KB/sizeof(VTD_SECOND_LEVEL_PAGING_ENTRY); Index2++) {
Lvl2PtEntry[Index2].Uint64 = BaseAddress;
SetSecondLevelPagingEntryAttribute (&Lvl2PtEntry[Index2], IoMmuAccess);
Lvl2PtEntry[Index2].Bits.PageSize = 1;
BaseAddress += SIZE_2MB;
if (BaseAddress >= MemoryLimit) {
break;
}
}
FlushPageTableMemory (VtdIndex, (UINTN)Lvl2PtEntry, SIZE_4KB);
if (BaseAddress >= MemoryLimit) {
break;
}
}
FlushPageTableMemory (VtdIndex, (UINTN)&Lvl3PtEntry[Lvl3Start], (UINTN)&Lvl3PtEntry[Lvl3End + 1] - (UINTN)&Lvl3PtEntry[Lvl3Start]);
if (BaseAddress >= MemoryLimit) {
break;
}
}
FlushPageTableMemory (VtdIndex, (UINTN)&Lvl4PtEntry[Lvl4Start], (UINTN)&Lvl4PtEntry[Lvl4End + 1] - (UINTN)&Lvl4PtEntry[Lvl4Start]);
return SecondLevelPagingEntry;
}
/**
Create second level paging entry.
@param[in] VtdIndex The index of the VTd engine.
@param[in] IoMmuAccess The IOMMU access.
@return The second level paging entry.
**/
VTD_SECOND_LEVEL_PAGING_ENTRY *
CreateSecondLevelPagingEntry (
IN UINTN VtdIndex,
IN UINT64 IoMmuAccess
)
{
VTD_SECOND_LEVEL_PAGING_ENTRY *SecondLevelPagingEntry;
SecondLevelPagingEntry = NULL;
SecondLevelPagingEntry = CreateSecondLevelPagingEntryTable (VtdIndex, SecondLevelPagingEntry, 0, mBelow4GMemoryLimit, IoMmuAccess);
if (SecondLevelPagingEntry == NULL) {
return NULL;
}
if (mAbove4GMemoryLimit != 0) {
ASSERT (mAbove4GMemoryLimit > BASE_4GB);
SecondLevelPagingEntry = CreateSecondLevelPagingEntryTable (VtdIndex, SecondLevelPagingEntry, SIZE_4GB, mAbove4GMemoryLimit, IoMmuAccess);
if (SecondLevelPagingEntry == NULL) {
return NULL;
}
}
return SecondLevelPagingEntry;
}
/**
Setup VTd translation table.
@retval EFI_SUCCESS Setup translation table successfully.
@retval EFI_OUT_OF_RESOURCE Setup translation table fail.
**/
EFI_STATUS
SetupTranslationTable (
VOID
)
{
EFI_STATUS Status;
UINTN Index;
for (Index = 0; Index < mVtdUnitNumber; Index++) {
DEBUG((DEBUG_INFO, "CreateContextEntry - %d\n", Index));
if (mVtdUnitInformation[Index].ECapReg.Bits.ECS) {
Status = CreateExtContextEntry (Index);
} else {
Status = CreateContextEntry (Index);
}
if (EFI_ERROR (Status)) {
return Status;
}
}
return EFI_SUCCESS;
}
/**
Dump DMAR context entry table.
@param[in] RootEntry DMAR root entry.
**/
VOID
DumpDmarContextEntryTable (
IN VTD_ROOT_ENTRY *RootEntry
)
{
UINTN Index;
UINTN Index2;
VTD_CONTEXT_ENTRY *ContextEntry;
DEBUG ((DEBUG_INFO,"=========================\n"));
DEBUG ((DEBUG_INFO,"DMAR Context Entry Table:\n"));
DEBUG ((DEBUG_INFO,"RootEntry Address - 0x%x\n", RootEntry));
for (Index = 0; Index < VTD_ROOT_ENTRY_NUMBER; Index++) {
if ((RootEntry[Index].Uint128.Uint64Lo != 0) || (RootEntry[Index].Uint128.Uint64Hi != 0)) {
DEBUG ((DEBUG_INFO," RootEntry(0x%02x) B%02x - 0x%016lx %016lx\n",
Index, Index, RootEntry[Index].Uint128.Uint64Hi, RootEntry[Index].Uint128.Uint64Lo));
}
if (RootEntry[Index].Bits.Present == 0) {
continue;
}
ContextEntry = (VTD_CONTEXT_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(RootEntry[Index].Bits.ContextTablePointerLo, RootEntry[Index].Bits.ContextTablePointerHi);
for (Index2 = 0; Index2 < VTD_CONTEXT_ENTRY_NUMBER; Index2++) {
if ((ContextEntry[Index2].Uint128.Uint64Lo != 0) || (ContextEntry[Index2].Uint128.Uint64Hi != 0)) {
DEBUG ((DEBUG_INFO," ContextEntry(0x%02x) D%02xF%02x - 0x%016lx %016lx\n",
Index2, Index2 >> 3, Index2 & 0x7, ContextEntry[Index2].Uint128.Uint64Hi, ContextEntry[Index2].Uint128.Uint64Lo));
}
if (ContextEntry[Index2].Bits.Present == 0) {
continue;
}
DumpSecondLevelPagingEntry ((VOID *)(UINTN)VTD_64BITS_ADDRESS(ContextEntry[Index2].Bits.SecondLevelPageTranslationPointerLo, ContextEntry[Index2].Bits.SecondLevelPageTranslationPointerHi));
}
}
DEBUG ((DEBUG_INFO,"=========================\n"));
}
/**
Dump DMAR second level paging entry.
@param[in] SecondLevelPagingEntry The second level paging entry.
**/
VOID
DumpSecondLevelPagingEntry (
IN VOID *SecondLevelPagingEntry
)
{
UINTN Index4;
UINTN Index3;
UINTN Index2;
UINTN Index1;
VTD_SECOND_LEVEL_PAGING_ENTRY *Lvl4PtEntry;
VTD_SECOND_LEVEL_PAGING_ENTRY *Lvl3PtEntry;
VTD_SECOND_LEVEL_PAGING_ENTRY *Lvl2PtEntry;
VTD_SECOND_LEVEL_PAGING_ENTRY *Lvl1PtEntry;
DEBUG ((DEBUG_VERBOSE,"================\n"));
DEBUG ((DEBUG_VERBOSE,"DMAR Second Level Page Table:\n"));
DEBUG ((DEBUG_VERBOSE,"SecondLevelPagingEntry Base - 0x%x\n", SecondLevelPagingEntry));
Lvl4PtEntry = (VTD_SECOND_LEVEL_PAGING_ENTRY *)SecondLevelPagingEntry;
for (Index4 = 0; Index4 < SIZE_4KB/sizeof(VTD_SECOND_LEVEL_PAGING_ENTRY); Index4++) {
if (Lvl4PtEntry[Index4].Uint64 != 0) {
DEBUG ((DEBUG_VERBOSE," Lvl4Pt Entry(0x%03x) - 0x%016lx\n", Index4, Lvl4PtEntry[Index4].Uint64));
}
if (Lvl4PtEntry[Index4].Uint64 == 0) {
continue;
}
Lvl3PtEntry = (VTD_SECOND_LEVEL_PAGING_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(Lvl4PtEntry[Index4].Bits.AddressLo, Lvl4PtEntry[Index4].Bits.AddressHi);
for (Index3 = 0; Index3 < SIZE_4KB/sizeof(VTD_SECOND_LEVEL_PAGING_ENTRY); Index3++) {
if (Lvl3PtEntry[Index3].Uint64 != 0) {
DEBUG ((DEBUG_VERBOSE," Lvl3Pt Entry(0x%03x) - 0x%016lx\n", Index3, Lvl3PtEntry[Index3].Uint64));
}
if (Lvl3PtEntry[Index3].Uint64 == 0) {
continue;
}
Lvl2PtEntry = (VTD_SECOND_LEVEL_PAGING_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(Lvl3PtEntry[Index3].Bits.AddressLo, Lvl3PtEntry[Index3].Bits.AddressHi);
for (Index2 = 0; Index2 < SIZE_4KB/sizeof(VTD_SECOND_LEVEL_PAGING_ENTRY); Index2++) {
if (Lvl2PtEntry[Index2].Uint64 != 0) {
DEBUG ((DEBUG_VERBOSE," Lvl2Pt Entry(0x%03x) - 0x%016lx\n", Index2, Lvl2PtEntry[Index2].Uint64));
}
if (Lvl2PtEntry[Index2].Uint64 == 0) {
continue;
}
if (Lvl2PtEntry[Index2].Bits.PageSize == 0) {
Lvl1PtEntry = (VTD_SECOND_LEVEL_PAGING_ENTRY *)(UINTN)VTD_64BITS_ADDRESS(Lvl2PtEntry[Index2].Bits.AddressLo, Lvl2PtEntry[Index2].Bits.AddressHi);
for (Index1 = 0; Index1 < SIZE_4KB/sizeof(VTD_SECOND_LEVEL_PAGING_ENTRY); Index1++) {
if (Lvl1PtEntry[Index1].Uint64 != 0) {
DEBUG ((DEBUG_VERBOSE," Lvl1Pt Entry(0x%03x) - 0x%016lx\n", Index1, Lvl1PtEntry[Index1].Uint64));
}
}
}
}
}
}
DEBUG ((DEBUG_VERBOSE,"================\n"));
}
/**
Invalid page entry.
@param VtdIndex The VTd engine index.
**/
VOID
InvalidatePageEntry (
IN UINTN VtdIndex
)
{
if (mVtdUnitInformation[VtdIndex].HasDirtyContext || mVtdUnitInformation[VtdIndex].HasDirtyPages) {
InvalidateVtdIOTLBGlobal (VtdIndex);
}
mVtdUnitInformation[VtdIndex].HasDirtyContext = FALSE;
mVtdUnitInformation[VtdIndex].HasDirtyPages = FALSE;
}
#define VTD_PG_R BIT0
#define VTD_PG_W BIT1
#define VTD_PG_X BIT2
#define VTD_PG_EMT (BIT3 | BIT4 | BIT5)
#define VTD_PG_TM (BIT62)
#define VTD_PG_PS BIT7
#define PAGE_PROGATE_BITS (VTD_PG_TM | VTD_PG_EMT | VTD_PG_W | VTD_PG_R)
#define PAGING_4K_MASK 0xFFF
#define PAGING_2M_MASK 0x1FFFFF
#define PAGING_1G_MASK 0x3FFFFFFF
#define PAGING_VTD_INDEX_MASK 0x1FF
#define PAGING_4K_ADDRESS_MASK_64 0x000FFFFFFFFFF000ull
#define PAGING_2M_ADDRESS_MASK_64 0x000FFFFFFFE00000ull
#define PAGING_1G_ADDRESS_MASK_64 0x000FFFFFC0000000ull
typedef enum {
PageNone,
Page4K,
Page2M,
Page1G,
} PAGE_ATTRIBUTE;
typedef struct {
PAGE_ATTRIBUTE Attribute;
UINT64 Length;
UINT64 AddressMask;
} PAGE_ATTRIBUTE_TABLE;
PAGE_ATTRIBUTE_TABLE mPageAttributeTable[] = {
{Page4K, SIZE_4KB, PAGING_4K_ADDRESS_MASK_64},
{Page2M, SIZE_2MB, PAGING_2M_ADDRESS_MASK_64},
{Page1G, SIZE_1GB, PAGING_1G_ADDRESS_MASK_64},
};
/**
Return length according to page attributes.
@param[in] PageAttributes The page attribute of the page entry.
@return The length of page entry.
**/
UINTN
PageAttributeToLength (
IN PAGE_ATTRIBUTE PageAttribute
)
{
UINTN Index;
for (Index = 0; Index < sizeof(mPageAttributeTable)/sizeof(mPageAttributeTable[0]); Index++) {
if (PageAttribute == mPageAttributeTable[Index].Attribute) {
return (UINTN)mPageAttributeTable[Index].Length;
}
}
return 0;
}
/**
Return page table entry to match the address.
@param[in] VtdIndex The index used to identify a VTd engine.
@param[in] SecondLevelPagingEntry The second level paging entry in VTd table for the device.
@param[in] Address The address to be checked.
@param[out] PageAttributes The page attribute of the page entry.
@return The page entry.
**/
VOID *
GetSecondLevelPageTableEntry (
IN UINTN VtdIndex,
IN VTD_SECOND_LEVEL_PAGING_ENTRY *SecondLevelPagingEntry,
IN PHYSICAL_ADDRESS Address,
OUT PAGE_ATTRIBUTE *PageAttribute
)
{
UINTN Index1;
UINTN Index2;
UINTN Index3;
UINTN Index4;
UINT64 *L1PageTable;
UINT64 *L2PageTable;
UINT64 *L3PageTable;
UINT64 *L4PageTable;
Index4 = ((UINTN)RShiftU64 (Address, 39)) & PAGING_VTD_INDEX_MASK;
Index3 = ((UINTN)Address >> 30) & PAGING_VTD_INDEX_MASK;
Index2 = ((UINTN)Address >> 21) & PAGING_VTD_INDEX_MASK;
Index1 = ((UINTN)Address >> 12) & PAGING_VTD_INDEX_MASK;
L4PageTable = (UINT64 *)SecondLevelPagingEntry;
if (L4PageTable[Index4] == 0) {
L4PageTable[Index4] = (UINT64)(UINTN)AllocateZeroPages (1);
if (L4PageTable[Index4] == 0) {
DEBUG ((DEBUG_ERROR,"!!!!!! ALLOCATE LVL4 PAGE FAIL (0x%x)!!!!!!\n", Index4));
ASSERT(FALSE);
*PageAttribute = PageNone;
return NULL;
}
FlushPageTableMemory (VtdIndex, (UINTN)L4PageTable[Index4], SIZE_4KB);
SetSecondLevelPagingEntryAttribute ((VTD_SECOND_LEVEL_PAGING_ENTRY *)&L4PageTable[Index4], EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE);
FlushPageTableMemory (VtdIndex, (UINTN)&L4PageTable[Index4], sizeof(L4PageTable[Index4]));
}
L3PageTable = (UINT64 *)(UINTN)(L4PageTable[Index4] & PAGING_4K_ADDRESS_MASK_64);
if (L3PageTable[Index3] == 0) {
L3PageTable[Index3] = (UINT64)(UINTN)AllocateZeroPages (1);
if (L3PageTable[Index3] == 0) {
DEBUG ((DEBUG_ERROR,"!!!!!! ALLOCATE LVL3 PAGE FAIL (0x%x, 0x%x)!!!!!!\n", Index4, Index3));
ASSERT(FALSE);
*PageAttribute = PageNone;
return NULL;
}
FlushPageTableMemory (VtdIndex, (UINTN)L3PageTable[Index3], SIZE_4KB);
SetSecondLevelPagingEntryAttribute ((VTD_SECOND_LEVEL_PAGING_ENTRY *)&L3PageTable[Index3], EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE);
FlushPageTableMemory (VtdIndex, (UINTN)&L3PageTable[Index3], sizeof(L3PageTable[Index3]));
}
if ((L3PageTable[Index3] & VTD_PG_PS) != 0) {
// 1G
*PageAttribute = Page1G;
return &L3PageTable[Index3];
}
L2PageTable = (UINT64 *)(UINTN)(L3PageTable[Index3] & PAGING_4K_ADDRESS_MASK_64);
if (L2PageTable[Index2] == 0) {
L2PageTable[Index2] = Address & PAGING_2M_ADDRESS_MASK_64;
SetSecondLevelPagingEntryAttribute ((VTD_SECOND_LEVEL_PAGING_ENTRY *)&L2PageTable[Index2], 0);
L2PageTable[Index2] |= VTD_PG_PS;
FlushPageTableMemory (VtdIndex, (UINTN)&L2PageTable[Index2], sizeof(L2PageTable[Index2]));
}
if ((L2PageTable[Index2] & VTD_PG_PS) != 0) {
// 2M
*PageAttribute = Page2M;
return &L2PageTable[Index2];
}
// 4k
L1PageTable = (UINT64 *)(UINTN)(L2PageTable[Index2] & PAGING_4K_ADDRESS_MASK_64);
if ((L1PageTable[Index1] == 0) && (Address != 0)) {
*PageAttribute = PageNone;
return NULL;
}
*PageAttribute = Page4K;
return &L1PageTable[Index1];
}
/**
Modify memory attributes of page entry.
@param[in] VtdIndex The index used to identify a VTd engine.
@param[in] PageEntry The page entry.
@param[in] IoMmuAccess The IOMMU access.
@param[out] IsModified TRUE means page table modified. FALSE means page table not modified.
**/
VOID
ConvertSecondLevelPageEntryAttribute (
IN UINTN VtdIndex,
IN VTD_SECOND_LEVEL_PAGING_ENTRY *PageEntry,
IN UINT64 IoMmuAccess,
OUT BOOLEAN *IsModified
)
{
UINT64 CurrentPageEntry;
UINT64 NewPageEntry;
CurrentPageEntry = PageEntry->Uint64;
SetSecondLevelPagingEntryAttribute (PageEntry, IoMmuAccess);
FlushPageTableMemory (VtdIndex, (UINTN)PageEntry, sizeof(*PageEntry));
NewPageEntry = PageEntry->Uint64;
if (CurrentPageEntry != NewPageEntry) {
*IsModified = TRUE;
DEBUG ((DEBUG_VERBOSE, "ConvertSecondLevelPageEntryAttribute 0x%lx", CurrentPageEntry));
DEBUG ((DEBUG_VERBOSE, "->0x%lx\n", NewPageEntry));
} else {
*IsModified = FALSE;
}
}
/**
This function returns if there is need to split page entry.
@param[in] BaseAddress The base address to be checked.
@param[in] Length The length to be checked.
@param[in] PageAttribute The page attribute of the page entry.
@retval SplitAttributes on if there is need to split page entry.
**/
PAGE_ATTRIBUTE
NeedSplitPage (
IN PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN PAGE_ATTRIBUTE PageAttribute
)
{
UINT64 PageEntryLength;
PageEntryLength = PageAttributeToLength (PageAttribute);
if (((BaseAddress & (PageEntryLength - 1)) == 0) && (Length >= PageEntryLength)) {
return PageNone;
}
if (((BaseAddress & PAGING_2M_MASK) != 0) || (Length < SIZE_2MB)) {
return Page4K;
}
return Page2M;
}
/**
This function splits one page entry to small page entries.
@param[in] VtdIndex The index used to identify a VTd engine.
@param[in] PageEntry The page entry to be splitted.
@param[in] PageAttribute The page attribute of the page entry.
@param[in] SplitAttribute How to split the page entry.
@retval RETURN_SUCCESS The page entry is splitted.
@retval RETURN_UNSUPPORTED The page entry does not support to be splitted.
@retval RETURN_OUT_OF_RESOURCES No resource to split page entry.
**/
RETURN_STATUS
SplitSecondLevelPage (
IN UINTN VtdIndex,
IN VTD_SECOND_LEVEL_PAGING_ENTRY *PageEntry,
IN PAGE_ATTRIBUTE PageAttribute,
IN PAGE_ATTRIBUTE SplitAttribute
)
{
UINT64 BaseAddress;
UINT64 *NewPageEntry;
UINTN Index;
ASSERT (PageAttribute == Page2M || PageAttribute == Page1G);
if (PageAttribute == Page2M) {
//
// Split 2M to 4K
//
ASSERT (SplitAttribute == Page4K);
if (SplitAttribute == Page4K) {
NewPageEntry = AllocateZeroPages (1);
DEBUG ((DEBUG_VERBOSE, "Split - 0x%x\n", NewPageEntry));
if (NewPageEntry == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
BaseAddress = PageEntry->Uint64 & PAGING_2M_ADDRESS_MASK_64;
for (Index = 0; Index < SIZE_4KB / sizeof(UINT64); Index++) {
NewPageEntry[Index] = (BaseAddress + SIZE_4KB * Index) | (PageEntry->Uint64 & PAGE_PROGATE_BITS);
}
FlushPageTableMemory (VtdIndex, (UINTN)NewPageEntry, SIZE_4KB);
PageEntry->Uint64 = (UINT64)(UINTN)NewPageEntry;
SetSecondLevelPagingEntryAttribute (PageEntry, EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE);
FlushPageTableMemory (VtdIndex, (UINTN)PageEntry, sizeof(*PageEntry));
return RETURN_SUCCESS;
} else {
return RETURN_UNSUPPORTED;
}
} else if (PageAttribute == Page1G) {
//
// Split 1G to 2M
// No need support 1G->4K directly, we should use 1G->2M, then 2M->4K to get more compact page table.
//
ASSERT (SplitAttribute == Page2M || SplitAttribute == Page4K);
if ((SplitAttribute == Page2M || SplitAttribute == Page4K)) {
NewPageEntry = AllocateZeroPages (1);
DEBUG ((DEBUG_VERBOSE, "Split - 0x%x\n", NewPageEntry));
if (NewPageEntry == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
BaseAddress = PageEntry->Uint64 & PAGING_1G_ADDRESS_MASK_64;
for (Index = 0; Index < SIZE_4KB / sizeof(UINT64); Index++) {
NewPageEntry[Index] = (BaseAddress + SIZE_2MB * Index) | VTD_PG_PS | (PageEntry->Uint64 & PAGE_PROGATE_BITS);
}
FlushPageTableMemory (VtdIndex, (UINTN)NewPageEntry, SIZE_4KB);
PageEntry->Uint64 = (UINT64)(UINTN)NewPageEntry;
SetSecondLevelPagingEntryAttribute (PageEntry, EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE);
FlushPageTableMemory (VtdIndex, (UINTN)PageEntry, sizeof(*PageEntry));
return RETURN_SUCCESS;
} else {
return RETURN_UNSUPPORTED;
}
} else {
return RETURN_UNSUPPORTED;
}
}
/**
Set VTd attribute for a system memory on second level page entry
@param[in] VtdIndex The index used to identify a VTd engine.
@param[in] DomainIdentifier The domain ID of the source.
@param[in] SecondLevelPagingEntry The second level paging entry in VTd table for the device.
@param[in] BaseAddress The base of device memory address to be used as the DMA memory.
@param[in] Length The length of device memory address to be used as the DMA memory.
@param[in] IoMmuAccess The IOMMU access.
@retval EFI_SUCCESS The IoMmuAccess is set for the memory range specified by BaseAddress and Length.
@retval EFI_INVALID_PARAMETER BaseAddress is not IoMmu Page size aligned.
@retval EFI_INVALID_PARAMETER Length is not IoMmu Page size aligned.
@retval EFI_INVALID_PARAMETER Length is 0.
@retval EFI_INVALID_PARAMETER IoMmuAccess specified an illegal combination of access.
@retval EFI_UNSUPPORTED The bit mask of IoMmuAccess is not supported by the IOMMU.
@retval EFI_UNSUPPORTED The IOMMU does not support the memory range specified by BaseAddress and Length.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to modify the IOMMU access.
@retval EFI_DEVICE_ERROR The IOMMU device reported an error while attempting the operation.
**/
EFI_STATUS
SetSecondLevelPagingAttribute (
IN UINTN VtdIndex,
IN UINT16 DomainIdentifier,
IN VTD_SECOND_LEVEL_PAGING_ENTRY *SecondLevelPagingEntry,
IN UINT64 BaseAddress,
IN UINT64 Length,
IN UINT64 IoMmuAccess
)
{
VTD_SECOND_LEVEL_PAGING_ENTRY *PageEntry;
PAGE_ATTRIBUTE PageAttribute;
UINTN PageEntryLength;
PAGE_ATTRIBUTE SplitAttribute;
EFI_STATUS Status;
BOOLEAN IsEntryModified;
DEBUG ((DEBUG_VERBOSE,"SetSecondLevelPagingAttribute (%d) (0x%016lx - 0x%016lx : %x) \n", VtdIndex, BaseAddress, Length, IoMmuAccess));
DEBUG ((DEBUG_VERBOSE," SecondLevelPagingEntry Base - 0x%x\n", SecondLevelPagingEntry));
if (BaseAddress != ALIGN_VALUE(BaseAddress, SIZE_4KB)) {
DEBUG ((DEBUG_ERROR, "SetSecondLevelPagingAttribute - Invalid Alignment\n"));
return EFI_UNSUPPORTED;
}
if (Length != ALIGN_VALUE(Length, SIZE_4KB)) {
DEBUG ((DEBUG_ERROR, "SetSecondLevelPagingAttribute - Invalid Alignment\n"));
return EFI_UNSUPPORTED;
}
while (Length != 0) {
PageEntry = GetSecondLevelPageTableEntry (VtdIndex, SecondLevelPagingEntry, BaseAddress, &PageAttribute);
if (PageEntry == NULL) {
DEBUG ((DEBUG_ERROR, "PageEntry - NULL\n"));
return RETURN_UNSUPPORTED;
}
PageEntryLength = PageAttributeToLength (PageAttribute);
SplitAttribute = NeedSplitPage (BaseAddress, Length, PageAttribute);
if (SplitAttribute == PageNone) {
ConvertSecondLevelPageEntryAttribute (VtdIndex, PageEntry, IoMmuAccess, &IsEntryModified);
if (IsEntryModified) {
mVtdUnitInformation[VtdIndex].HasDirtyPages = TRUE;
}
//
// Convert success, move to next
//
BaseAddress += PageEntryLength;
Length -= PageEntryLength;
} else {
Status = SplitSecondLevelPage (VtdIndex, PageEntry, PageAttribute, SplitAttribute);
if (RETURN_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "SplitSecondLevelPage - %r\n", Status));
return RETURN_UNSUPPORTED;
}
mVtdUnitInformation[VtdIndex].HasDirtyPages = TRUE;
//
// Just split current page
// Convert success in next around
//
}
}
return EFI_SUCCESS;
}
/**
Set VTd attribute for a system memory.
@param[in] VtdIndex The index used to identify a VTd engine.
@param[in] DomainIdentifier The domain ID of the source.
@param[in] SecondLevelPagingEntry The second level paging entry in VTd table for the device.
@param[in] BaseAddress The base of device memory address to be used as the DMA memory.
@param[in] Length The length of device memory address to be used as the DMA memory.
@param[in] IoMmuAccess The IOMMU access.
@retval EFI_SUCCESS The IoMmuAccess is set for the memory range specified by BaseAddress and Length.
@retval EFI_INVALID_PARAMETER BaseAddress is not IoMmu Page size aligned.
@retval EFI_INVALID_PARAMETER Length is not IoMmu Page size aligned.
@retval EFI_INVALID_PARAMETER Length is 0.
@retval EFI_INVALID_PARAMETER IoMmuAccess specified an illegal combination of access.
@retval EFI_UNSUPPORTED The bit mask of IoMmuAccess is not supported by the IOMMU.
@retval EFI_UNSUPPORTED The IOMMU does not support the memory range specified by BaseAddress and Length.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to modify the IOMMU access.
@retval EFI_DEVICE_ERROR The IOMMU device reported an error while attempting the operation.
**/
EFI_STATUS
SetPageAttribute (
IN UINTN VtdIndex,
IN UINT16 DomainIdentifier,
IN VTD_SECOND_LEVEL_PAGING_ENTRY *SecondLevelPagingEntry,
IN UINT64 BaseAddress,
IN UINT64 Length,
IN UINT64 IoMmuAccess
)
{
EFI_STATUS Status;
Status = EFI_NOT_FOUND;
if (SecondLevelPagingEntry != NULL) {
Status = SetSecondLevelPagingAttribute (VtdIndex, DomainIdentifier, SecondLevelPagingEntry, BaseAddress, Length, IoMmuAccess);
}
return Status;
}
/**
Set VTd attribute for a system memory.
@param[in] Segment The Segment used to identify a VTd engine.
@param[in] SourceId The SourceId used to identify a VTd engine and table entry.
@param[in] BaseAddress The base of device memory address to be used as the DMA memory.
@param[in] Length The length of device memory address to be used as the DMA memory.
@param[in] IoMmuAccess The IOMMU access.
@retval EFI_SUCCESS The IoMmuAccess is set for the memory range specified by BaseAddress and Length.
@retval EFI_INVALID_PARAMETER BaseAddress is not IoMmu Page size aligned.
@retval EFI_INVALID_PARAMETER Length is not IoMmu Page size aligned.
@retval EFI_INVALID_PARAMETER Length is 0.
@retval EFI_INVALID_PARAMETER IoMmuAccess specified an illegal combination of access.
@retval EFI_UNSUPPORTED The bit mask of IoMmuAccess is not supported by the IOMMU.
@retval EFI_UNSUPPORTED The IOMMU does not support the memory range specified by BaseAddress and Length.
@retval EFI_OUT_OF_RESOURCES There are not enough resources available to modify the IOMMU access.
@retval EFI_DEVICE_ERROR The IOMMU device reported an error while attempting the operation.
**/
EFI_STATUS
SetAccessAttribute (
IN UINT16 Segment,
IN VTD_SOURCE_ID SourceId,
IN UINT64 BaseAddress,
IN UINT64 Length,
IN UINT64 IoMmuAccess
)
{
UINTN VtdIndex;
EFI_STATUS Status;
VTD_EXT_CONTEXT_ENTRY *ExtContextEntry;
VTD_CONTEXT_ENTRY *ContextEntry;
VTD_SECOND_LEVEL_PAGING_ENTRY *SecondLevelPagingEntry;
UINT64 Pt;
UINTN PciDataIndex;
UINT16 DomainIdentifier;
SecondLevelPagingEntry = NULL;
DEBUG ((DEBUG_VERBOSE,"SetAccessAttribute (S%04x B%02x D%02x F%02x) (0x%016lx - 0x%08x, %x)\n", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function, BaseAddress, (UINTN)Length, IoMmuAccess));
VtdIndex = FindVtdIndexByPciDevice (Segment, SourceId, &ExtContextEntry, &ContextEntry);
if (VtdIndex == (UINTN)-1) {
DEBUG ((DEBUG_ERROR,"SetAccessAttribute - Pci device (S%04x B%02x D%02x F%02x) not found!\n", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
return EFI_DEVICE_ERROR;
}
PciDataIndex = GetPciDataIndex (VtdIndex, Segment, SourceId);
mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceData[PciDataIndex].AccessCount++;
//
// DomainId should not be 0.
//
DomainIdentifier = (UINT16)(PciDataIndex + 1);
if (ExtContextEntry != NULL) {
if (ExtContextEntry->Bits.Present == 0) {
SecondLevelPagingEntry = CreateSecondLevelPagingEntry (VtdIndex, 0);
DEBUG ((DEBUG_VERBOSE,"SecondLevelPagingEntry - 0x%x (S%04x B%02x D%02x F%02x) New\n", SecondLevelPagingEntry, Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
Pt = (UINT64)RShiftU64 ((UINT64)(UINTN)SecondLevelPagingEntry, 12);
ExtContextEntry->Bits.SecondLevelPageTranslationPointerLo = (UINT32) Pt;
ExtContextEntry->Bits.SecondLevelPageTranslationPointerHi = (UINT32) RShiftU64(Pt, 20);
ExtContextEntry->Bits.DomainIdentifier = DomainIdentifier;
ExtContextEntry->Bits.Present = 1;
FlushPageTableMemory (VtdIndex, (UINTN)ExtContextEntry, sizeof(*ExtContextEntry));
DumpDmarExtContextEntryTable (mVtdUnitInformation[VtdIndex].ExtRootEntryTable);
mVtdUnitInformation[VtdIndex].HasDirtyContext = TRUE;
} else {
SecondLevelPagingEntry = (VOID *)(UINTN)VTD_64BITS_ADDRESS(ExtContextEntry->Bits.SecondLevelPageTranslationPointerLo, ExtContextEntry->Bits.SecondLevelPageTranslationPointerHi);
DEBUG ((DEBUG_VERBOSE,"SecondLevelPagingEntry - 0x%x (S%04x B%02x D%02x F%02x)\n", SecondLevelPagingEntry, Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
}
} else if (ContextEntry != NULL) {
if (ContextEntry->Bits.Present == 0) {
SecondLevelPagingEntry = CreateSecondLevelPagingEntry (VtdIndex, 0);
DEBUG ((DEBUG_VERBOSE,"SecondLevelPagingEntry - 0x%x (S%04x B%02x D%02x F%02x) New\n", SecondLevelPagingEntry, Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
Pt = (UINT64)RShiftU64 ((UINT64)(UINTN)SecondLevelPagingEntry, 12);
ContextEntry->Bits.SecondLevelPageTranslationPointerLo = (UINT32) Pt;
ContextEntry->Bits.SecondLevelPageTranslationPointerHi = (UINT32) RShiftU64(Pt, 20);
ContextEntry->Bits.DomainIdentifier = DomainIdentifier;
ContextEntry->Bits.Present = 1;
FlushPageTableMemory (VtdIndex, (UINTN)ContextEntry, sizeof(*ContextEntry));
DumpDmarContextEntryTable (mVtdUnitInformation[VtdIndex].RootEntryTable);
mVtdUnitInformation[VtdIndex].HasDirtyContext = TRUE;
} else {
SecondLevelPagingEntry = (VOID *)(UINTN)VTD_64BITS_ADDRESS(ContextEntry->Bits.SecondLevelPageTranslationPointerLo, ContextEntry->Bits.SecondLevelPageTranslationPointerHi);
DEBUG ((DEBUG_VERBOSE,"SecondLevelPagingEntry - 0x%x (S%04x B%02x D%02x F%02x)\n", SecondLevelPagingEntry, Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
}
}
//
// Do not update FixedSecondLevelPagingEntry
//
if (SecondLevelPagingEntry != mVtdUnitInformation[VtdIndex].FixedSecondLevelPagingEntry) {
Status = SetPageAttribute (
VtdIndex,
DomainIdentifier,
SecondLevelPagingEntry,
BaseAddress,
Length,
IoMmuAccess
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR,"SetPageAttribute - %r\n", Status));
return Status;
}
}
InvalidatePageEntry (VtdIndex);
return EFI_SUCCESS;
}
/**
Always enable the VTd page attribute for the device.
@param[in] Segment The Segment used to identify a VTd engine.
@param[in] SourceId The SourceId used to identify a VTd engine and table entry.
@retval EFI_SUCCESS The VTd entry is updated to always enable all DMA access for the specific device.
**/
EFI_STATUS
AlwaysEnablePageAttribute (
IN UINT16 Segment,
IN VTD_SOURCE_ID SourceId
)
{
UINTN VtdIndex;
VTD_EXT_CONTEXT_ENTRY *ExtContextEntry;
VTD_CONTEXT_ENTRY *ContextEntry;
VTD_SECOND_LEVEL_PAGING_ENTRY *SecondLevelPagingEntry;
UINT64 Pt;
DEBUG ((DEBUG_INFO,"AlwaysEnablePageAttribute (S%04x B%02x D%02x F%02x)\n", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
VtdIndex = FindVtdIndexByPciDevice (Segment, SourceId, &ExtContextEntry, &ContextEntry);
if (VtdIndex == (UINTN)-1) {
DEBUG ((DEBUG_ERROR,"AlwaysEnablePageAttribute - Pci device (S%04x B%02x D%02x F%02x) not found!\n", Segment, SourceId.Bits.Bus, SourceId.Bits.Device, SourceId.Bits.Function));
return EFI_DEVICE_ERROR;
}
if (mVtdUnitInformation[VtdIndex].FixedSecondLevelPagingEntry == 0) {
DEBUG((DEBUG_INFO, "CreateSecondLevelPagingEntry - %d\n", VtdIndex));
mVtdUnitInformation[VtdIndex].FixedSecondLevelPagingEntry = CreateSecondLevelPagingEntry (VtdIndex, EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE);
}
SecondLevelPagingEntry = mVtdUnitInformation[VtdIndex].FixedSecondLevelPagingEntry;
Pt = (UINT64)RShiftU64 ((UINT64)(UINTN)SecondLevelPagingEntry, 12);
if (ExtContextEntry != NULL) {
ExtContextEntry->Bits.SecondLevelPageTranslationPointerLo = (UINT32) Pt;
ExtContextEntry->Bits.SecondLevelPageTranslationPointerHi = (UINT32) RShiftU64(Pt, 20);
ExtContextEntry->Bits.DomainIdentifier = ((1 << (UINT8)((UINTN)mVtdUnitInformation[VtdIndex].CapReg.Bits.ND * 2 + 4)) - 1);
ExtContextEntry->Bits.Present = 1;
FlushPageTableMemory (VtdIndex, (UINTN)ExtContextEntry, sizeof(*ExtContextEntry));
} else if (ContextEntry != NULL) {
ContextEntry->Bits.SecondLevelPageTranslationPointerLo = (UINT32) Pt;
ContextEntry->Bits.SecondLevelPageTranslationPointerHi = (UINT32) RShiftU64(Pt, 20);
ContextEntry->Bits.DomainIdentifier = ((1 << (UINT8)((UINTN)mVtdUnitInformation[VtdIndex].CapReg.Bits.ND * 2 + 4)) - 1);
ContextEntry->Bits.Present = 1;
FlushPageTableMemory (VtdIndex, (UINTN)ContextEntry, sizeof(*ContextEntry));
}
return EFI_SUCCESS;
}
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