diff options
Diffstat (limited to 'IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c')
| -rw-r--r-- | IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c | 683 |
1 files changed, 0 insertions, 683 deletions
diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c deleted file mode 100644 index 956ebb2d3d..0000000000 --- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/DmaProtection.c +++ /dev/null @@ -1,683 +0,0 @@ -/** @file
-
- Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR>
- SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#include "DmaProtection.h"
-
-UINT64 mBelow4GMemoryLimit;
-UINT64 mAbove4GMemoryLimit;
-
-EDKII_PLATFORM_VTD_POLICY_PROTOCOL *mPlatformVTdPolicy;
-
-VTD_ACCESS_REQUEST *mAccessRequest = NULL;
-UINTN mAccessRequestCount = 0;
-UINTN mAccessRequestMaxCount = 0;
-
-/**
- Append VTd Access Request to global.
-
- @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
-RequestAccessAttribute (
- IN UINT16 Segment,
- IN VTD_SOURCE_ID SourceId,
- IN UINT64 BaseAddress,
- IN UINT64 Length,
- IN UINT64 IoMmuAccess
- )
-{
- VTD_ACCESS_REQUEST *NewAccessRequest;
- UINTN Index;
-
- //
- // Optimization for memory.
- //
- // If the last record is to IoMmuAccess=0,
- // Check previous records and remove the matched entry.
- //
- if (IoMmuAccess == 0) {
- for (Index = 0; Index < mAccessRequestCount; Index++) {
- if ((mAccessRequest[Index].Segment == Segment) &&
- (mAccessRequest[Index].SourceId.Uint16 == SourceId.Uint16) &&
- (mAccessRequest[Index].BaseAddress == BaseAddress) &&
- (mAccessRequest[Index].Length == Length) &&
- (mAccessRequest[Index].IoMmuAccess != 0)) {
- //
- // Remove this record [Index].
- // No need to add the new record.
- //
- if (Index != mAccessRequestCount - 1) {
- CopyMem (
- &mAccessRequest[Index],
- &mAccessRequest[Index + 1],
- sizeof (VTD_ACCESS_REQUEST) * (mAccessRequestCount - 1 - Index)
- );
- }
- ZeroMem (&mAccessRequest[mAccessRequestCount - 1], sizeof(VTD_ACCESS_REQUEST));
- mAccessRequestCount--;
- return EFI_SUCCESS;
- }
- }
- }
-
- if (mAccessRequestCount >= mAccessRequestMaxCount) {
- NewAccessRequest = AllocateZeroPool (sizeof(*NewAccessRequest) * (mAccessRequestMaxCount + MAX_VTD_ACCESS_REQUEST));
- if (NewAccessRequest == NULL) {
- return EFI_OUT_OF_RESOURCES;
- }
- mAccessRequestMaxCount += MAX_VTD_ACCESS_REQUEST;
- if (mAccessRequest != NULL) {
- CopyMem (NewAccessRequest, mAccessRequest, sizeof(*NewAccessRequest) * mAccessRequestCount);
- FreePool (mAccessRequest);
- }
- mAccessRequest = NewAccessRequest;
- }
-
- ASSERT (mAccessRequestCount < mAccessRequestMaxCount);
-
- mAccessRequest[mAccessRequestCount].Segment = Segment;
- mAccessRequest[mAccessRequestCount].SourceId = SourceId;
- mAccessRequest[mAccessRequestCount].BaseAddress = BaseAddress;
- mAccessRequest[mAccessRequestCount].Length = Length;
- mAccessRequest[mAccessRequestCount].IoMmuAccess = IoMmuAccess;
-
- mAccessRequestCount++;
-
- return EFI_SUCCESS;
-}
-
-/**
- Process Access Requests from before DMAR table is installed.
-
-**/
-VOID
-ProcessRequestedAccessAttribute (
- VOID
- )
-{
- UINTN Index;
- EFI_STATUS Status;
-
- DEBUG ((DEBUG_INFO, "ProcessRequestedAccessAttribute ...\n"));
-
- for (Index = 0; Index < mAccessRequestCount; Index++) {
- DEBUG ((
- DEBUG_INFO,
- "PCI(S%x.B%x.D%x.F%x) ",
- mAccessRequest[Index].Segment,
- mAccessRequest[Index].SourceId.Bits.Bus,
- mAccessRequest[Index].SourceId.Bits.Device,
- mAccessRequest[Index].SourceId.Bits.Function
- ));
- DEBUG ((
- DEBUG_INFO,
- "(0x%lx~0x%lx) - %lx\n",
- mAccessRequest[Index].BaseAddress,
- mAccessRequest[Index].Length,
- mAccessRequest[Index].IoMmuAccess
- ));
- Status = SetAccessAttribute (
- mAccessRequest[Index].Segment,
- mAccessRequest[Index].SourceId,
- mAccessRequest[Index].BaseAddress,
- mAccessRequest[Index].Length,
- mAccessRequest[Index].IoMmuAccess
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_ERROR, "SetAccessAttribute %r: ", Status));
- }
- }
-
- if (mAccessRequest != NULL) {
- FreePool (mAccessRequest);
- }
- mAccessRequest = NULL;
- mAccessRequestCount = 0;
- mAccessRequestMaxCount = 0;
-
- DEBUG ((DEBUG_INFO, "ProcessRequestedAccessAttribute Done\n"));
-}
-
-/**
- return the UEFI memory information.
-
- @param[out] Below4GMemoryLimit The below 4GiB memory limit
- @param[out] Above4GMemoryLimit The above 4GiB memory limit
-**/
-VOID
-ReturnUefiMemoryMap (
- OUT UINT64 *Below4GMemoryLimit,
- OUT UINT64 *Above4GMemoryLimit
- )
-{
- EFI_STATUS Status;
- EFI_MEMORY_DESCRIPTOR *EfiMemoryMap;
- EFI_MEMORY_DESCRIPTOR *EfiMemoryMapEnd;
- EFI_MEMORY_DESCRIPTOR *EfiEntry;
- EFI_MEMORY_DESCRIPTOR *NextEfiEntry;
- EFI_MEMORY_DESCRIPTOR TempEfiEntry;
- UINTN EfiMemoryMapSize;
- UINTN EfiMapKey;
- UINTN EfiDescriptorSize;
- UINT32 EfiDescriptorVersion;
- UINT64 MemoryBlockLength;
-
- *Below4GMemoryLimit = 0;
- *Above4GMemoryLimit = 0;
-
- //
- // Get the EFI memory map.
- //
- EfiMemoryMapSize = 0;
- EfiMemoryMap = NULL;
- Status = gBS->GetMemoryMap (
- &EfiMemoryMapSize,
- EfiMemoryMap,
- &EfiMapKey,
- &EfiDescriptorSize,
- &EfiDescriptorVersion
- );
- ASSERT (Status == EFI_BUFFER_TOO_SMALL);
-
- do {
- //
- // Use size returned back plus 1 descriptor for the AllocatePool.
- // We don't just multiply by 2 since the "for" loop below terminates on
- // EfiMemoryMapEnd which is dependent upon EfiMemoryMapSize. Otherwize
- // we process bogus entries and create bogus E820 entries.
- //
- EfiMemoryMap = (EFI_MEMORY_DESCRIPTOR *) AllocatePool (EfiMemoryMapSize);
- ASSERT (EfiMemoryMap != NULL);
- Status = gBS->GetMemoryMap (
- &EfiMemoryMapSize,
- EfiMemoryMap,
- &EfiMapKey,
- &EfiDescriptorSize,
- &EfiDescriptorVersion
- );
- if (EFI_ERROR (Status)) {
- FreePool (EfiMemoryMap);
- }
- } while (Status == EFI_BUFFER_TOO_SMALL);
-
- ASSERT_EFI_ERROR (Status);
-
- //
- // Sort memory map from low to high
- //
- EfiEntry = EfiMemoryMap;
- NextEfiEntry = NEXT_MEMORY_DESCRIPTOR (EfiEntry, EfiDescriptorSize);
- EfiMemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) EfiMemoryMap + EfiMemoryMapSize);
- while (EfiEntry < EfiMemoryMapEnd) {
- while (NextEfiEntry < EfiMemoryMapEnd) {
- if (EfiEntry->PhysicalStart > NextEfiEntry->PhysicalStart) {
- CopyMem (&TempEfiEntry, EfiEntry, sizeof (EFI_MEMORY_DESCRIPTOR));
- CopyMem (EfiEntry, NextEfiEntry, sizeof (EFI_MEMORY_DESCRIPTOR));
- CopyMem (NextEfiEntry, &TempEfiEntry, sizeof (EFI_MEMORY_DESCRIPTOR));
- }
-
- NextEfiEntry = NEXT_MEMORY_DESCRIPTOR (NextEfiEntry, EfiDescriptorSize);
- }
-
- EfiEntry = NEXT_MEMORY_DESCRIPTOR (EfiEntry, EfiDescriptorSize);
- NextEfiEntry = NEXT_MEMORY_DESCRIPTOR (EfiEntry, EfiDescriptorSize);
- }
-
- //
- //
- //
- DEBUG ((DEBUG_INFO, "MemoryMap:\n"));
- EfiEntry = EfiMemoryMap;
- EfiMemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *) ((UINT8 *) EfiMemoryMap + EfiMemoryMapSize);
- while (EfiEntry < EfiMemoryMapEnd) {
- MemoryBlockLength = (UINT64) (LShiftU64 (EfiEntry->NumberOfPages, 12));
- DEBUG ((DEBUG_INFO, "Entry(0x%02x) 0x%016lx - 0x%016lx\n", EfiEntry->Type, EfiEntry->PhysicalStart, EfiEntry->PhysicalStart + MemoryBlockLength));
- switch (EfiEntry->Type) {
- case EfiLoaderCode:
- case EfiLoaderData:
- case EfiBootServicesCode:
- case EfiBootServicesData:
- case EfiConventionalMemory:
- case EfiRuntimeServicesCode:
- case EfiRuntimeServicesData:
- case EfiACPIReclaimMemory:
- case EfiACPIMemoryNVS:
- case EfiReservedMemoryType:
- if ((EfiEntry->PhysicalStart + MemoryBlockLength) <= BASE_1MB) {
- //
- // Skip the memory block is under 1MB
- //
- } else if (EfiEntry->PhysicalStart >= BASE_4GB) {
- if (*Above4GMemoryLimit < EfiEntry->PhysicalStart + MemoryBlockLength) {
- *Above4GMemoryLimit = EfiEntry->PhysicalStart + MemoryBlockLength;
- }
- } else {
- if (*Below4GMemoryLimit < EfiEntry->PhysicalStart + MemoryBlockLength) {
- *Below4GMemoryLimit = EfiEntry->PhysicalStart + MemoryBlockLength;
- }
- }
- break;
- }
- EfiEntry = NEXT_MEMORY_DESCRIPTOR (EfiEntry, EfiDescriptorSize);
- }
-
- FreePool (EfiMemoryMap);
-
- DEBUG ((DEBUG_INFO, "Result:\n"));
- DEBUG ((DEBUG_INFO, "Below4GMemoryLimit: 0x%016lx\n", *Below4GMemoryLimit));
- DEBUG ((DEBUG_INFO, "Above4GMemoryLimit: 0x%016lx\n", *Above4GMemoryLimit));
-
- return ;
-}
-
-/**
- The scan bus callback function to always enable page attribute.
-
- @param[in] Context The context of the callback.
- @param[in] Segment The segment of the source.
- @param[in] Bus The bus of the source.
- @param[in] Device The device of the source.
- @param[in] Function The function of the source.
-
- @retval EFI_SUCCESS The VTd entry is updated to always enable all DMA access for the specific device.
-**/
-EFI_STATUS
-EFIAPI
-ScanBusCallbackAlwaysEnablePageAttribute (
- IN VOID *Context,
- IN UINT16 Segment,
- IN UINT8 Bus,
- IN UINT8 Device,
- IN UINT8 Function
- )
-{
- VTD_SOURCE_ID SourceId;
- EFI_STATUS Status;
-
- SourceId.Bits.Bus = Bus;
- SourceId.Bits.Device = Device;
- SourceId.Bits.Function = Function;
- Status = AlwaysEnablePageAttribute (Segment, SourceId);
- return Status;
-}
-
-/**
- Always enable the VTd page attribute for the device in the DeviceScope.
-
- @param[in] DeviceScope the input device scope data structure
-
- @retval EFI_SUCCESS The VTd entry is updated to always enable all DMA access for the specific device in the device scope.
-**/
-EFI_STATUS
-AlwaysEnablePageAttributeDeviceScope (
- IN EDKII_PLATFORM_VTD_DEVICE_SCOPE *DeviceScope
- )
-{
- UINT8 Bus;
- UINT8 Device;
- UINT8 Function;
- VTD_SOURCE_ID SourceId;
- UINT8 SecondaryBusNumber;
- EFI_STATUS Status;
-
- Status = GetPciBusDeviceFunction (DeviceScope->SegmentNumber, &DeviceScope->DeviceScope, &Bus, &Device, &Function);
-
- if (DeviceScope->DeviceScope.Type == EFI_ACPI_DEVICE_SCOPE_ENTRY_TYPE_PCI_BRIDGE) {
- //
- // Need scan the bridge and add all devices.
- //
- SecondaryBusNumber = PciSegmentRead8 (PCI_SEGMENT_LIB_ADDRESS(DeviceScope->SegmentNumber, Bus, Device, Function, PCI_BRIDGE_SECONDARY_BUS_REGISTER_OFFSET));
- Status = ScanPciBus (NULL, DeviceScope->SegmentNumber, SecondaryBusNumber, ScanBusCallbackAlwaysEnablePageAttribute);
- return Status;
- } else {
- SourceId.Bits.Bus = Bus;
- SourceId.Bits.Device = Device;
- SourceId.Bits.Function = Function;
- Status = AlwaysEnablePageAttribute (DeviceScope->SegmentNumber, SourceId);
- return Status;
- }
-}
-
-/**
- Always enable the VTd page attribute for the device matching DeviceId.
-
- @param[in] PciDeviceId the input PCI device ID
-
- @retval EFI_SUCCESS The VTd entry is updated to always enable all DMA access for the specific device matching DeviceId.
-**/
-EFI_STATUS
-AlwaysEnablePageAttributePciDeviceId (
- IN EDKII_PLATFORM_VTD_PCI_DEVICE_ID *PciDeviceId
- )
-{
- UINTN VtdIndex;
- UINTN PciIndex;
- PCI_DEVICE_DATA *PciDeviceData;
- EFI_STATUS Status;
-
- for (VtdIndex = 0; VtdIndex < mVtdUnitNumber; VtdIndex++) {
- for (PciIndex = 0; PciIndex < mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceDataNumber; PciIndex++) {
- PciDeviceData = &mVtdUnitInformation[VtdIndex].PciDeviceInfo.PciDeviceData[PciIndex];
-
- if (((PciDeviceId->VendorId == 0xFFFF) || (PciDeviceId->VendorId == PciDeviceData->PciDeviceId.VendorId)) &&
- ((PciDeviceId->DeviceId == 0xFFFF) || (PciDeviceId->DeviceId == PciDeviceData->PciDeviceId.DeviceId)) &&
- ((PciDeviceId->RevisionId == 0xFF) || (PciDeviceId->RevisionId == PciDeviceData->PciDeviceId.RevisionId)) &&
- ((PciDeviceId->SubsystemVendorId == 0xFFFF) || (PciDeviceId->SubsystemVendorId == PciDeviceData->PciDeviceId.SubsystemVendorId)) &&
- ((PciDeviceId->SubsystemDeviceId == 0xFFFF) || (PciDeviceId->SubsystemDeviceId == PciDeviceData->PciDeviceId.SubsystemDeviceId)) ) {
- Status = AlwaysEnablePageAttribute (mVtdUnitInformation[VtdIndex].Segment, PciDeviceData->PciSourceId);
- if (EFI_ERROR(Status)) {
- continue;
- }
- }
- }
- }
- return EFI_SUCCESS;
-}
-
-/**
- Always enable the VTd page attribute for the device.
-
- @param[in] DeviceInfo the exception device information
-
- @retval EFI_SUCCESS The VTd entry is updated to always enable all DMA access for the specific device in the device info.
-**/
-EFI_STATUS
-AlwaysEnablePageAttributeExceptionDeviceInfo (
- IN EDKII_PLATFORM_VTD_EXCEPTION_DEVICE_INFO *DeviceInfo
- )
-{
- switch (DeviceInfo->Type) {
- case EDKII_PLATFORM_VTD_EXCEPTION_DEVICE_INFO_TYPE_DEVICE_SCOPE:
- return AlwaysEnablePageAttributeDeviceScope ((VOID *)(DeviceInfo + 1));
- case EDKII_PLATFORM_VTD_EXCEPTION_DEVICE_INFO_TYPE_PCI_DEVICE_ID:
- return AlwaysEnablePageAttributePciDeviceId ((VOID *)(DeviceInfo + 1));
- default:
- return EFI_UNSUPPORTED;
- }
-}
-
-/**
- Initialize platform VTd policy.
-**/
-VOID
-InitializePlatformVTdPolicy (
- VOID
- )
-{
- EFI_STATUS Status;
- UINTN DeviceInfoCount;
- VOID *DeviceInfo;
- EDKII_PLATFORM_VTD_EXCEPTION_DEVICE_INFO *ThisDeviceInfo;
- UINTN Index;
-
- //
- // It is optional.
- //
- Status = gBS->LocateProtocol (
- &gEdkiiPlatformVTdPolicyProtocolGuid,
- NULL,
- (VOID **)&mPlatformVTdPolicy
- );
- if (!EFI_ERROR(Status)) {
- DEBUG ((DEBUG_INFO, "InitializePlatformVTdPolicy\n"));
- Status = mPlatformVTdPolicy->GetExceptionDeviceList (mPlatformVTdPolicy, &DeviceInfoCount, &DeviceInfo);
- if (!EFI_ERROR(Status)) {
- ThisDeviceInfo = DeviceInfo;
- for (Index = 0; Index < DeviceInfoCount; Index++) {
- if (ThisDeviceInfo->Type == EDKII_PLATFORM_VTD_EXCEPTION_DEVICE_INFO_TYPE_END) {
- break;
- }
- AlwaysEnablePageAttributeExceptionDeviceInfo (ThisDeviceInfo);
- ThisDeviceInfo = (VOID *)((UINTN)ThisDeviceInfo + ThisDeviceInfo->Length);
- }
- FreePool (DeviceInfo);
- }
- }
-}
-
-/**
- Setup VTd engine.
-**/
-VOID
-SetupVtd (
- VOID
- )
-{
- EFI_STATUS Status;
- VOID *PciEnumerationComplete;
- UINTN Index;
- UINT64 Below4GMemoryLimit;
- UINT64 Above4GMemoryLimit;
-
- //
- // PCI Enumeration must be done
- //
- Status = gBS->LocateProtocol (
- &gEfiPciEnumerationCompleteProtocolGuid,
- NULL,
- &PciEnumerationComplete
- );
- ASSERT_EFI_ERROR (Status);
-
- ReturnUefiMemoryMap (&Below4GMemoryLimit, &Above4GMemoryLimit);
- Below4GMemoryLimit = ALIGN_VALUE_UP(Below4GMemoryLimit, SIZE_256MB);
- DEBUG ((DEBUG_INFO, " Adjusted Below4GMemoryLimit: 0x%016lx\n", Below4GMemoryLimit));
-
- mBelow4GMemoryLimit = Below4GMemoryLimit;
- mAbove4GMemoryLimit = Above4GMemoryLimit;
-
- //
- // 1. setup
- //
- DEBUG ((DEBUG_INFO, "ParseDmarAcpiTable\n"));
- Status = ParseDmarAcpiTableDrhd ();
- if (EFI_ERROR (Status)) {
- return;
- }
- DEBUG ((DEBUG_INFO, "PrepareVtdConfig\n"));
- PrepareVtdConfig ();
-
- //
- // 2. initialization
- //
- DEBUG ((DEBUG_INFO, "SetupTranslationTable\n"));
- Status = SetupTranslationTable ();
- if (EFI_ERROR (Status)) {
- return;
- }
-
- InitializePlatformVTdPolicy ();
-
- ParseDmarAcpiTableRmrr ();
-
- if ((PcdGet8 (PcdVTdPolicyPropertyMask) & BIT2) == 0) {
- //
- // Support IOMMU access attribute request recording before DMAR table is installed.
- // Here is to process the requests.
- //
- ProcessRequestedAccessAttribute ();
- }
-
- for (Index = 0; Index < mVtdUnitNumber; Index++) {
- DEBUG ((DEBUG_INFO,"VTD Unit %d (Segment: %04x)\n", Index, mVtdUnitInformation[Index].Segment));
- if (mVtdUnitInformation[Index].ExtRootEntryTable != NULL) {
- DumpDmarExtContextEntryTable (mVtdUnitInformation[Index].ExtRootEntryTable);
- }
- if (mVtdUnitInformation[Index].RootEntryTable != NULL) {
- DumpDmarContextEntryTable (mVtdUnitInformation[Index].RootEntryTable);
- }
- }
-
- //
- // 3. enable
- //
- DEBUG ((DEBUG_INFO, "EnableDmar\n"));
- Status = EnableDmar ();
- if (EFI_ERROR (Status)) {
- return;
- }
- DEBUG ((DEBUG_INFO, "DumpVtdRegs\n"));
- DumpVtdRegsAll ();
-}
-
-/**
- Notification function of ACPI Table change.
-
- This is a notification function registered on ACPI Table change event.
-
- @param Event Event whose notification function is being invoked.
- @param Context Pointer to the notification function's context.
-
-**/
-VOID
-EFIAPI
-AcpiNotificationFunc (
- IN EFI_EVENT Event,
- IN VOID *Context
- )
-{
- EFI_STATUS Status;
-
- Status = GetDmarAcpiTable ();
- if (EFI_ERROR (Status)) {
- if (Status == EFI_ALREADY_STARTED) {
- gBS->CloseEvent (Event);
- }
- return;
- }
- SetupVtd ();
- gBS->CloseEvent (Event);
-}
-
-/**
- Exit boot service callback function.
-
- @param[in] Event The event handle.
- @param[in] Context The event content.
-**/
-VOID
-EFIAPI
-OnExitBootServices (
- IN EFI_EVENT Event,
- IN VOID *Context
- )
-{
- UINTN VtdIndex;
-
- DEBUG ((DEBUG_INFO, "Vtd OnExitBootServices\n"));
- DumpVtdRegsAll ();
-
- DEBUG ((DEBUG_INFO, "Invalidate all\n"));
- for (VtdIndex = 0; VtdIndex < mVtdUnitNumber; VtdIndex++) {
- FlushWriteBuffer (VtdIndex);
-
- InvalidateContextCache (VtdIndex);
-
- InvalidateIOTLB (VtdIndex);
- }
-
- if ((PcdGet8(PcdVTdPolicyPropertyMask) & BIT1) == 0) {
- DisableDmar ();
- DumpVtdRegsAll ();
- }
-}
-
-/**
- Legacy boot callback function.
-
- @param[in] Event The event handle.
- @param[in] Context The event content.
-**/
-VOID
-EFIAPI
-OnLegacyBoot (
- EFI_EVENT Event,
- VOID *Context
- )
-{
- DEBUG ((DEBUG_INFO, "Vtd OnLegacyBoot\n"));
- DumpVtdRegsAll ();
- DisableDmar ();
- DumpVtdRegsAll ();
-}
-
-/**
- Initialize DMA protection.
-**/
-VOID
-InitializeDmaProtection (
- VOID
- )
-{
- EFI_STATUS Status;
- EFI_EVENT ExitBootServicesEvent;
- EFI_EVENT LegacyBootEvent;
- EFI_EVENT EventAcpi10;
- EFI_EVENT EventAcpi20;
-
- Status = gBS->CreateEventEx (
- EVT_NOTIFY_SIGNAL,
- VTD_TPL_LEVEL,
- AcpiNotificationFunc,
- NULL,
- &gEfiAcpi10TableGuid,
- &EventAcpi10
- );
- ASSERT_EFI_ERROR (Status);
-
- Status = gBS->CreateEventEx (
- EVT_NOTIFY_SIGNAL,
- VTD_TPL_LEVEL,
- AcpiNotificationFunc,
- NULL,
- &gEfiAcpi20TableGuid,
- &EventAcpi20
- );
- ASSERT_EFI_ERROR (Status);
-
- //
- // Signal the events initially for the case
- // that DMAR table has been installed.
- //
- gBS->SignalEvent (EventAcpi20);
- gBS->SignalEvent (EventAcpi10);
-
- Status = gBS->CreateEventEx (
- EVT_NOTIFY_SIGNAL,
- TPL_CALLBACK,
- OnExitBootServices,
- NULL,
- &gEfiEventExitBootServicesGuid,
- &ExitBootServicesEvent
- );
- ASSERT_EFI_ERROR (Status);
-
- Status = EfiCreateEventLegacyBootEx (
- TPL_CALLBACK,
- OnLegacyBoot,
- NULL,
- &LegacyBootEvent
- );
- ASSERT_EFI_ERROR (Status);
-
- return ;
-}
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