| /** @file | |
| TdxHelper Functions which are used in SEC phase | |
| Copyright (c) 2022 - 2023, Intel Corporation. All rights reserved.<BR> | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #include <PiPei.h> | |
| #include <Library/BaseLib.h> | |
| #include <Library/DebugLib.h> | |
| #include <Library/HobLib.h> | |
| #include <Library/BaseCryptLib.h> | |
| #include <Library/BaseMemoryLib.h> | |
| #include <IndustryStandard/Tdx.h> | |
| #include <IndustryStandard/IntelTdx.h> | |
| #include <IndustryStandard/Tpm20.h> | |
| #include <Library/TdxLib.h> | |
| #include <Library/TdxMailboxLib.h> | |
| #include <Library/SynchronizationLib.h> | |
| #include <Pi/PiHob.h> | |
| #include <WorkArea.h> | |
| #include <ConfidentialComputingGuestAttr.h> | |
| #include <Library/TdxHelperLib.h> | |
| #define ALIGNED_2MB_MASK 0x1fffff | |
| #define MEGABYTE_SHIFT 20 | |
| #define ACCEPT_CHUNK_SIZE SIZE_32MB | |
| #define AP_STACK_SIZE SIZE_16KB | |
| #define APS_STACK_SIZE(CpusNum) (ALIGN_VALUE(CpusNum*AP_STACK_SIZE, SIZE_2MB)) | |
| /** | |
| Build the GuidHob for tdx measurements which were done in SEC phase. | |
| The measurement values are stored in WorkArea. | |
| @retval EFI_SUCCESS The GuidHob is built successfully | |
| @retval Others Other errors as indicated | |
| **/ | |
| EFI_STATUS | |
| InternalBuildGuidHobForTdxMeasurement ( | |
| VOID | |
| ); | |
| /** | |
| This function will be called to accept pages. Only BSP accepts pages. | |
| TDCALL(ACCEPT_PAGE) supports the accept page size of 4k and 2M. To | |
| simplify the implementation, the Memory to be accpeted is splitted | |
| into 3 parts: | |
| ----------------- <-- StartAddress1 (not 2M aligned) | |
| | part 1 | Length1 < 2M | |
| |---------------| <-- StartAddress2 (2M aligned) | |
| | | Length2 = Integer multiples of 2M | |
| | part 2 | | |
| | | | |
| |---------------| <-- StartAddress3 | |
| | part 3 | Length3 < 2M | |
| |---------------| | |
| @param[in] PhysicalAddress Start physical adress | |
| @param[in] PhysicalEnd End physical address | |
| @retval EFI_SUCCESS Accept memory successfully | |
| @retval Others Other errors as indicated | |
| **/ | |
| STATIC | |
| EFI_STATUS | |
| EFIAPI | |
| BspAcceptMemoryResourceRange ( | |
| IN EFI_PHYSICAL_ADDRESS PhysicalAddress, | |
| IN EFI_PHYSICAL_ADDRESS PhysicalEnd | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| UINT32 AcceptPageSize; | |
| UINT64 StartAddress1; | |
| UINT64 StartAddress2; | |
| UINT64 StartAddress3; | |
| UINT64 TotalLength; | |
| UINT64 Length1; | |
| UINT64 Length2; | |
| UINT64 Length3; | |
| UINT64 Pages; | |
| AcceptPageSize = FixedPcdGet32 (PcdTdxAcceptPageSize); | |
| TotalLength = PhysicalEnd - PhysicalAddress; | |
| StartAddress1 = 0; | |
| StartAddress2 = 0; | |
| StartAddress3 = 0; | |
| Length1 = 0; | |
| Length2 = 0; | |
| Length3 = 0; | |
| if (TotalLength == 0) { | |
| return EFI_SUCCESS; | |
| } | |
| if (ALIGN_VALUE (PhysicalAddress, SIZE_2MB) != PhysicalAddress) { | |
| StartAddress1 = PhysicalAddress; | |
| Length1 = ALIGN_VALUE (PhysicalAddress, SIZE_2MB) - PhysicalAddress; | |
| if (Length1 >= TotalLength) { | |
| Length1 = TotalLength; | |
| } | |
| PhysicalAddress += Length1; | |
| TotalLength -= Length1; | |
| } | |
| if (TotalLength > SIZE_2MB) { | |
| StartAddress2 = PhysicalAddress; | |
| Length2 = TotalLength & ~(UINT64)ALIGNED_2MB_MASK; | |
| PhysicalAddress += Length2; | |
| TotalLength -= Length2; | |
| } | |
| if (TotalLength) { | |
| StartAddress3 = PhysicalAddress; | |
| Length3 = TotalLength; | |
| } | |
| Status = EFI_SUCCESS; | |
| if (Length1 > 0) { | |
| Pages = Length1 / SIZE_4KB; | |
| Status = TdAcceptPages (StartAddress1, Pages, SIZE_4KB); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| } | |
| if (Length2 > 0) { | |
| Pages = Length2 / AcceptPageSize; | |
| Status = TdAcceptPages (StartAddress2, Pages, AcceptPageSize); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| } | |
| if (Length3 > 0) { | |
| Pages = Length3 / SIZE_4KB; | |
| Status = TdAcceptPages (StartAddress3, Pages, SIZE_4KB); | |
| ASSERT (!EFI_ERROR (Status)); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| } | |
| return Status; | |
| } | |
| /** | |
| * This function is called by BSP and APs to accept memory. | |
| * Note: | |
| * The input PhysicalStart/PhysicalEnd indicates the whole memory region | |
| * to be accepted. BSP or AP only accepts one piece in the whole memory region. | |
| * | |
| * @param CpuIndex vCPU index | |
| * @param CpusNum Total vCPU number of a Tdx guest | |
| * @param PhysicalStart Start address of a memory region which is to be accepted | |
| * @param PhysicalEnd End address of a memory region which is to be accepted | |
| * | |
| * @retval EFI_SUCCESS Successfully accept the memory | |
| * @retval Other Other errors as indicated | |
| */ | |
| STATIC | |
| EFI_STATUS | |
| EFIAPI | |
| BspApAcceptMemoryResourceRange ( | |
| UINT32 CpuIndex, | |
| UINT32 CpusNum, | |
| EFI_PHYSICAL_ADDRESS PhysicalStart, | |
| EFI_PHYSICAL_ADDRESS PhysicalEnd | |
| ) | |
| { | |
| UINT64 Status; | |
| UINT64 Pages; | |
| UINT64 Stride; | |
| UINT64 AcceptPageSize; | |
| EFI_PHYSICAL_ADDRESS PhysicalAddress; | |
| AcceptPageSize = (UINT64)(UINTN)FixedPcdGet32 (PcdTdxAcceptPageSize); | |
| Status = EFI_SUCCESS; | |
| Stride = (UINTN)CpusNum * ACCEPT_CHUNK_SIZE; | |
| PhysicalAddress = PhysicalStart + ACCEPT_CHUNK_SIZE * (UINTN)CpuIndex; | |
| while (!EFI_ERROR (Status) && PhysicalAddress < PhysicalEnd) { | |
| Pages = MIN (ACCEPT_CHUNK_SIZE, PhysicalEnd - PhysicalAddress) / AcceptPageSize; | |
| Status = TdAcceptPages (PhysicalAddress, Pages, (UINT32)(UINTN)AcceptPageSize); | |
| ASSERT (!EFI_ERROR (Status)); | |
| PhysicalAddress += Stride; | |
| } | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| * This function is called by APs to accept memory. | |
| * | |
| * @param CpuIndex vCPU index of an AP | |
| * @param PhysicalStart Start address of a memory region which is to be accepted | |
| * @param PhysicalEnd End address of a memory region which is to be accepted | |
| * | |
| * @retval EFI_SUCCESS Successfully accept the memory | |
| * @retval Others Other errors as indicated | |
| */ | |
| STATIC | |
| EFI_STATUS | |
| EFIAPI | |
| ApAcceptMemoryResourceRange ( | |
| UINT32 CpuIndex, | |
| EFI_PHYSICAL_ADDRESS PhysicalStart, | |
| EFI_PHYSICAL_ADDRESS PhysicalEnd | |
| ) | |
| { | |
| UINT64 Status; | |
| TD_RETURN_DATA TdReturnData; | |
| Status = TdCall (TDCALL_TDINFO, 0, 0, 0, &TdReturnData); | |
| if (Status != TDX_EXIT_REASON_SUCCESS) { | |
| ASSERT (FALSE); | |
| return EFI_ABORTED; | |
| } | |
| if ((CpuIndex == 0) || (CpuIndex >= TdReturnData.TdInfo.NumVcpus)) { | |
| ASSERT (FALSE); | |
| return EFI_ABORTED; | |
| } | |
| return BspApAcceptMemoryResourceRange (CpuIndex, TdReturnData.TdInfo.NumVcpus, PhysicalStart, PhysicalEnd); | |
| } | |
| /** | |
| * This function is called by BSP. It coordinates BSP/APs to accept memory together. | |
| * | |
| * @param PhysicalStart Start address of a memory region which is to be accepted | |
| * @param PhysicalEnd End address of a memory region which is to be accepted | |
| * @param APsStackAddress APs stack address | |
| * @param CpusNum Total vCPU number of the Tdx guest | |
| * | |
| * @retval EFI_SUCCESS Successfully accept the memory | |
| * @retval Others Other errors as indicated | |
| */ | |
| STATIC | |
| EFI_STATUS | |
| EFIAPI | |
| MpAcceptMemoryResourceRange ( | |
| IN EFI_PHYSICAL_ADDRESS PhysicalStart, | |
| IN EFI_PHYSICAL_ADDRESS PhysicalEnd, | |
| IN OUT EFI_PHYSICAL_ADDRESS APsStackAddress, | |
| IN UINT32 CpusNum | |
| ) | |
| { | |
| UINT64 Length; | |
| EFI_STATUS Status; | |
| Length = PhysicalEnd - PhysicalStart; | |
| DEBUG ((DEBUG_INFO, "MpAccept : 0x%llx - 0x%llx (0x%llx)\n", PhysicalStart, PhysicalEnd, Length)); | |
| if (Length == 0) { | |
| return EFI_SUCCESS; | |
| } | |
| // | |
| // The start address is not 2M aligned. BSP first accept the part which is not 2M aligned. | |
| // | |
| if (ALIGN_VALUE (PhysicalStart, SIZE_2MB) != PhysicalStart) { | |
| Length = MIN (ALIGN_VALUE (PhysicalStart, SIZE_2MB) - PhysicalStart, Length); | |
| Status = BspAcceptMemoryResourceRange (PhysicalStart, PhysicalStart + Length); | |
| ASSERT (Status == EFI_SUCCESS); | |
| PhysicalStart += Length; | |
| Length = PhysicalEnd - PhysicalStart; | |
| } | |
| if (Length == 0) { | |
| return EFI_SUCCESS; | |
| } | |
| // | |
| // BSP will accept the memory by itself if the memory is not big enough compared with a chunk. | |
| // | |
| if (Length <= ACCEPT_CHUNK_SIZE) { | |
| return BspAcceptMemoryResourceRange (PhysicalStart, PhysicalEnd); | |
| } | |
| // | |
| // Now APs are asked to accept the memory together. | |
| // | |
| MpSerializeStart (); | |
| MpSendWakeupCommand ( | |
| MpProtectedModeWakeupCommandAcceptPages, | |
| (UINT64)(UINTN)ApAcceptMemoryResourceRange, | |
| PhysicalStart, | |
| PhysicalEnd, | |
| APsStackAddress, | |
| AP_STACK_SIZE | |
| ); | |
| // | |
| // Now BSP does its job. | |
| // | |
| BspApAcceptMemoryResourceRange (0, CpusNum, PhysicalStart, PhysicalEnd); | |
| MpSerializeEnd (); | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| BSP accept a small piece of memory which will be used as APs stack. | |
| @param[in] VmmHobList The Hoblist pass the firmware | |
| @param[in] APsStackSize APs stack size | |
| @param[out] PhysicalAddressEnd The physical end address of accepted memory in phase-1 | |
| @retval EFI_SUCCESS Process the HobList successfully | |
| @retval Others Other errors as indicated | |
| **/ | |
| STATIC | |
| EFI_STATUS | |
| EFIAPI | |
| AcceptMemoryForAPsStack ( | |
| IN CONST VOID *VmmHobList, | |
| IN UINT32 APsStackSize, | |
| OUT EFI_PHYSICAL_ADDRESS *PhysicalAddressEnd | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_PEI_HOB_POINTERS Hob; | |
| EFI_PHYSICAL_ADDRESS PhysicalEnd; | |
| EFI_PHYSICAL_ADDRESS PhysicalStart; | |
| UINT64 ResourceLength; | |
| BOOLEAN MemoryRegionFound; | |
| ASSERT (VmmHobList != NULL); | |
| Status = EFI_SUCCESS; | |
| Hob.Raw = (UINT8 *)VmmHobList; | |
| MemoryRegionFound = FALSE; | |
| DEBUG ((DEBUG_INFO, "AcceptMemoryForAPsStack with APsStackSize=0x%x\n", APsStackSize)); | |
| // | |
| // Parse the HOB list until end of list or matching type is found. | |
| // | |
| while (!END_OF_HOB_LIST (Hob) && !MemoryRegionFound) { | |
| if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) { | |
| DEBUG ((DEBUG_INFO, "\nResourceType: 0x%x\n", Hob.ResourceDescriptor->ResourceType)); | |
| if (Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_UNACCEPTED) { | |
| ResourceLength = Hob.ResourceDescriptor->ResourceLength; | |
| PhysicalStart = Hob.ResourceDescriptor->PhysicalStart; | |
| PhysicalEnd = PhysicalStart + ResourceLength; | |
| DEBUG ((DEBUG_INFO, "ResourceAttribute: 0x%x\n", Hob.ResourceDescriptor->ResourceAttribute)); | |
| DEBUG ((DEBUG_INFO, "PhysicalStart: 0x%llx\n", PhysicalStart)); | |
| DEBUG ((DEBUG_INFO, "ResourceLength: 0x%llx\n", ResourceLength)); | |
| DEBUG ((DEBUG_INFO, "Owner: %g\n\n", &Hob.ResourceDescriptor->Owner)); | |
| if (ResourceLength >= APsStackSize) { | |
| MemoryRegionFound = TRUE; | |
| if (ResourceLength > ACCEPT_CHUNK_SIZE) { | |
| PhysicalEnd = Hob.ResourceDescriptor->PhysicalStart + APsStackSize; | |
| } | |
| } | |
| Status = BspAcceptMemoryResourceRange ( | |
| Hob.ResourceDescriptor->PhysicalStart, | |
| PhysicalEnd | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| break; | |
| } | |
| } | |
| } | |
| Hob.Raw = GET_NEXT_HOB (Hob); | |
| } | |
| ASSERT (MemoryRegionFound); | |
| *PhysicalAddressEnd = PhysicalEnd; | |
| return Status; | |
| } | |
| /** | |
| BSP and APs work togeter to accept memory which is under the address of 4G. | |
| @param[in] VmmHobList The Hoblist pass the firmware | |
| @param[in] CpusNum Number of vCPUs | |
| @param[in] APsStackStartAddres Start address of APs stack | |
| @param[in] PhysicalAddressStart Start physical address which to be accepted | |
| @retval EFI_SUCCESS Process the HobList successfully | |
| @retval Others Other errors as indicated | |
| **/ | |
| STATIC | |
| EFI_STATUS | |
| EFIAPI | |
| AcceptMemory ( | |
| IN CONST VOID *VmmHobList, | |
| IN UINT32 CpusNum, | |
| IN EFI_PHYSICAL_ADDRESS APsStackStartAddress, | |
| IN EFI_PHYSICAL_ADDRESS PhysicalAddressStart | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| EFI_PEI_HOB_POINTERS Hob; | |
| EFI_PHYSICAL_ADDRESS PhysicalStart; | |
| EFI_PHYSICAL_ADDRESS PhysicalEnd; | |
| EFI_PHYSICAL_ADDRESS AcceptMemoryEndAddress; | |
| Status = EFI_SUCCESS; | |
| AcceptMemoryEndAddress = BASE_4GB; | |
| ASSERT (VmmHobList != NULL); | |
| Hob.Raw = (UINT8 *)VmmHobList; | |
| DEBUG ((DEBUG_INFO, "AcceptMemory under address of 4G\n")); | |
| // | |
| // Parse the HOB list until end of list or matching type is found. | |
| // | |
| while (!END_OF_HOB_LIST (Hob)) { | |
| if (Hob.Header->HobType == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR) { | |
| if (Hob.ResourceDescriptor->ResourceType == EFI_RESOURCE_MEMORY_UNACCEPTED) { | |
| PhysicalStart = Hob.ResourceDescriptor->PhysicalStart; | |
| PhysicalEnd = PhysicalStart + Hob.ResourceDescriptor->ResourceLength; | |
| if (PhysicalEnd <= PhysicalAddressStart) { | |
| // this memory region has been accepted. Skipped it. | |
| Hob.Raw = GET_NEXT_HOB (Hob); | |
| continue; | |
| } | |
| if (PhysicalStart >= AcceptMemoryEndAddress) { | |
| // this memory region is not to be accepted. And we're done. | |
| break; | |
| } | |
| if (PhysicalStart >= PhysicalAddressStart) { | |
| // this memory region has not been acceted. | |
| } else if ((PhysicalStart < PhysicalAddressStart) && (PhysicalEnd > PhysicalAddressStart)) { | |
| // part of the memory region has been accepted. | |
| PhysicalStart = PhysicalAddressStart; | |
| } | |
| // then compare the PhysicalEnd with AcceptMemoryEndAddress | |
| if (PhysicalEnd >= AcceptMemoryEndAddress) { | |
| PhysicalEnd = AcceptMemoryEndAddress; | |
| } | |
| DEBUG ((DEBUG_INFO, "ResourceAttribute: 0x%x\n", Hob.ResourceDescriptor->ResourceAttribute)); | |
| DEBUG ((DEBUG_INFO, "PhysicalStart: 0x%llx\n", Hob.ResourceDescriptor->PhysicalStart)); | |
| DEBUG ((DEBUG_INFO, "ResourceLength: 0x%llx\n", Hob.ResourceDescriptor->ResourceLength)); | |
| DEBUG ((DEBUG_INFO, "Owner: %g\n\n", &Hob.ResourceDescriptor->Owner)); | |
| // Now we're ready to accept memory [PhysicalStart, PhysicalEnd) | |
| if (CpusNum == 1) { | |
| Status = BspAcceptMemoryResourceRange (PhysicalStart, PhysicalEnd); | |
| } else { | |
| Status = MpAcceptMemoryResourceRange ( | |
| PhysicalStart, | |
| PhysicalEnd, | |
| APsStackStartAddress, | |
| CpusNum | |
| ); | |
| } | |
| if (EFI_ERROR (Status)) { | |
| ASSERT (FALSE); | |
| break; | |
| } | |
| if (PhysicalEnd == AcceptMemoryEndAddress) { | |
| break; | |
| } | |
| } | |
| } | |
| Hob.Raw = GET_NEXT_HOB (Hob); | |
| } | |
| return Status; | |
| } | |
| /** | |
| Check the value whether in the valid list. | |
| @param[in] Value A value | |
| @param[in] ValidList A pointer to valid list | |
| @param[in] ValidListLength Length of valid list | |
| @retval TRUE The value is in valid list. | |
| @retval FALSE The value is not in valid list. | |
| **/ | |
| STATIC | |
| BOOLEAN | |
| EFIAPI | |
| IsInValidList ( | |
| IN UINT32 Value, | |
| IN UINT32 *ValidList, | |
| IN UINT32 ValidListLength | |
| ) | |
| { | |
| UINT32 index; | |
| if (ValidList == NULL) { | |
| return FALSE; | |
| } | |
| for (index = 0; index < ValidListLength; index++) { | |
| if (ValidList[index] == Value) { | |
| return TRUE; | |
| } | |
| } | |
| return FALSE; | |
| } | |
| /** | |
| Check the integrity of VMM Hob List. | |
| @param[in] VmmHobList A pointer to Hob List | |
| @retval TRUE The Hob List is valid. | |
| @retval FALSE The Hob List is invalid. | |
| **/ | |
| STATIC | |
| BOOLEAN | |
| EFIAPI | |
| ValidateHobList ( | |
| IN CONST VOID *VmmHobList | |
| ) | |
| { | |
| EFI_PEI_HOB_POINTERS Hob; | |
| UINT32 EFI_BOOT_MODE_LIST[] = { | |
| BOOT_WITH_FULL_CONFIGURATION, | |
| BOOT_WITH_MINIMAL_CONFIGURATION, | |
| BOOT_ASSUMING_NO_CONFIGURATION_CHANGES, | |
| BOOT_WITH_FULL_CONFIGURATION_PLUS_DIAGNOSTICS, | |
| BOOT_WITH_DEFAULT_SETTINGS, | |
| BOOT_ON_S4_RESUME, | |
| BOOT_ON_S5_RESUME, | |
| BOOT_WITH_MFG_MODE_SETTINGS, | |
| BOOT_ON_S2_RESUME, | |
| BOOT_ON_S3_RESUME, | |
| BOOT_ON_FLASH_UPDATE, | |
| BOOT_IN_RECOVERY_MODE | |
| }; | |
| UINT32 EFI_RESOURCE_TYPE_LIST[] = { | |
| EFI_RESOURCE_SYSTEM_MEMORY, | |
| EFI_RESOURCE_MEMORY_MAPPED_IO, | |
| EFI_RESOURCE_IO, | |
| EFI_RESOURCE_FIRMWARE_DEVICE, | |
| EFI_RESOURCE_MEMORY_MAPPED_IO_PORT, | |
| EFI_RESOURCE_MEMORY_RESERVED, | |
| EFI_RESOURCE_IO_RESERVED, | |
| EFI_RESOURCE_MEMORY_UNACCEPTED | |
| }; | |
| if (VmmHobList == NULL) { | |
| DEBUG ((DEBUG_ERROR, "HOB: HOB data pointer is NULL\n")); | |
| return FALSE; | |
| } | |
| Hob.Raw = (UINT8 *)VmmHobList; | |
| // | |
| // Parse the HOB list until end of list or matching type is found. | |
| // | |
| while (!END_OF_HOB_LIST (Hob)) { | |
| if (Hob.Header->Reserved != (UINT32)0) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob header Reserved filed should be zero\n")); | |
| return FALSE; | |
| } | |
| if (Hob.Header->HobLength == 0) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob header LEANGTH should not be zero\n")); | |
| return FALSE; | |
| } | |
| switch (Hob.Header->HobType) { | |
| case EFI_HOB_TYPE_HANDOFF: | |
| if (Hob.Header->HobLength != sizeof (EFI_HOB_HANDOFF_INFO_TABLE)) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_HANDOFF)); | |
| return FALSE; | |
| } | |
| if (IsInValidList (Hob.HandoffInformationTable->BootMode, EFI_BOOT_MODE_LIST, ARRAY_SIZE (EFI_BOOT_MODE_LIST)) == FALSE) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Unknow HandoffInformationTable BootMode type. Type: 0x%08x\n", Hob.HandoffInformationTable->BootMode)); | |
| return FALSE; | |
| } | |
| if ((Hob.HandoffInformationTable->EfiFreeMemoryTop % 4096) != 0) { | |
| DEBUG ((DEBUG_ERROR, "HOB: HandoffInformationTable EfiFreeMemoryTop address must be 4-KB aligned to meet page restrictions of UEFI.\ | |
| Address: 0x%016lx\n", Hob.HandoffInformationTable->EfiFreeMemoryTop)); | |
| return FALSE; | |
| } | |
| break; | |
| case EFI_HOB_TYPE_RESOURCE_DESCRIPTOR: | |
| if (Hob.Header->HobLength != sizeof (EFI_HOB_RESOURCE_DESCRIPTOR)) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_RESOURCE_DESCRIPTOR)); | |
| return FALSE; | |
| } | |
| if (IsInValidList (Hob.ResourceDescriptor->ResourceType, EFI_RESOURCE_TYPE_LIST, ARRAY_SIZE (EFI_RESOURCE_TYPE_LIST)) == FALSE) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Unknow ResourceDescriptor ResourceType type. Type: 0x%08x\n", Hob.ResourceDescriptor->ResourceType)); | |
| return FALSE; | |
| } | |
| if ((Hob.ResourceDescriptor->ResourceAttribute & (~(EFI_RESOURCE_ATTRIBUTE_PRESENT | | |
| EFI_RESOURCE_ATTRIBUTE_INITIALIZED | | |
| EFI_RESOURCE_ATTRIBUTE_TESTED | | |
| EFI_RESOURCE_ATTRIBUTE_READ_PROTECTED | | |
| EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTED | | |
| EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTED | | |
| EFI_RESOURCE_ATTRIBUTE_PERSISTENT | | |
| EFI_RESOURCE_ATTRIBUTE_SINGLE_BIT_ECC | | |
| EFI_RESOURCE_ATTRIBUTE_MULTIPLE_BIT_ECC | | |
| EFI_RESOURCE_ATTRIBUTE_ECC_RESERVED_1 | | |
| EFI_RESOURCE_ATTRIBUTE_ECC_RESERVED_2 | | |
| EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE | | |
| EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE | | |
| EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE | | |
| EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE | | |
| EFI_RESOURCE_ATTRIBUTE_16_BIT_IO | | |
| EFI_RESOURCE_ATTRIBUTE_32_BIT_IO | | |
| EFI_RESOURCE_ATTRIBUTE_64_BIT_IO | | |
| EFI_RESOURCE_ATTRIBUTE_UNCACHED_EXPORTED | | |
| EFI_RESOURCE_ATTRIBUTE_READ_PROTECTABLE | | |
| EFI_RESOURCE_ATTRIBUTE_WRITE_PROTECTABLE | | |
| EFI_RESOURCE_ATTRIBUTE_EXECUTION_PROTECTABLE | | |
| EFI_RESOURCE_ATTRIBUTE_PERSISTABLE | | |
| EFI_RESOURCE_ATTRIBUTE_READ_ONLY_PROTECTED | | |
| EFI_RESOURCE_ATTRIBUTE_READ_ONLY_PROTECTABLE | | |
| EFI_RESOURCE_ATTRIBUTE_ENCRYPTED| | |
| EFI_RESOURCE_ATTRIBUTE_SPECIAL_PURPOSE | | |
| EFI_RESOURCE_ATTRIBUTE_MORE_RELIABLE))) != 0) | |
| { | |
| DEBUG ((DEBUG_ERROR, "HOB: Unknow ResourceDescriptor ResourceAttribute type. Type: 0x%08x\n", Hob.ResourceDescriptor->ResourceAttribute)); | |
| return FALSE; | |
| } | |
| break; | |
| // EFI_HOB_GUID_TYPE is variable length data, so skip check | |
| case EFI_HOB_TYPE_GUID_EXTENSION: | |
| break; | |
| case EFI_HOB_TYPE_FV: | |
| if (Hob.Header->HobLength != sizeof (EFI_HOB_FIRMWARE_VOLUME)) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_FV)); | |
| return FALSE; | |
| } | |
| break; | |
| case EFI_HOB_TYPE_FV2: | |
| if (Hob.Header->HobLength != sizeof (EFI_HOB_FIRMWARE_VOLUME2)) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_FV2)); | |
| return FALSE; | |
| } | |
| break; | |
| case EFI_HOB_TYPE_FV3: | |
| if (Hob.Header->HobLength != sizeof (EFI_HOB_FIRMWARE_VOLUME3)) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_FV3)); | |
| return FALSE; | |
| } | |
| break; | |
| case EFI_HOB_TYPE_CPU: | |
| if (Hob.Header->HobLength != sizeof (EFI_HOB_CPU)) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob length is not equal corresponding hob structure. Type: 0x%04x\n", EFI_HOB_TYPE_CPU)); | |
| return FALSE; | |
| } | |
| for (UINT32 index = 0; index < 6; index++) { | |
| if (Hob.Cpu->Reserved[index] != 0) { | |
| DEBUG ((DEBUG_ERROR, "HOB: Cpu Reserved field will always be set to zero.\n")); | |
| return FALSE; | |
| } | |
| } | |
| break; | |
| default: | |
| DEBUG ((DEBUG_ERROR, "HOB: Hob type is not know. Type: 0x%04x\n", Hob.Header->HobType)); | |
| return FALSE; | |
| } | |
| // Get next HOB | |
| Hob.Raw = (UINT8 *)(Hob.Raw + Hob.Header->HobLength); | |
| } | |
| return TRUE; | |
| } | |
| /** | |
| Processing the incoming HobList for the TDX | |
| Firmware must parse list, and accept the pages of memory before their can be | |
| use by the guest. | |
| @param[in] VmmHobList The Hoblist pass the firmware | |
| @retval EFI_SUCCESS Process the HobList successfully | |
| @retval Others Other errors as indicated | |
| **/ | |
| STATIC | |
| EFI_STATUS | |
| EFIAPI | |
| ProcessHobList ( | |
| IN CONST VOID *VmmHobList | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| UINT32 CpusNum; | |
| EFI_PHYSICAL_ADDRESS PhysicalEnd; | |
| EFI_PHYSICAL_ADDRESS APsStackStartAddress; | |
| CpusNum = GetCpusNum (); | |
| // | |
| // If there are mutli-vCPU in a TDX guest, accept memory is split into 2 phases. | |
| // Phase-1 accepts a small piece of memory by BSP. This piece of memory | |
| // is used to setup AP's stack. | |
| // After that phase-2 accepts a big piece of memory by BSP/APs. | |
| // | |
| // TDVF supports 4K and 2M accept-page-size. The memory which can be accpeted | |
| // in 2M accept-page-size must be 2M aligned and multiple 2M. So we align | |
| // APsStackSize to 2M size aligned. | |
| // | |
| if (CpusNum > 1) { | |
| Status = AcceptMemoryForAPsStack (VmmHobList, APS_STACK_SIZE (CpusNum), &PhysicalEnd); | |
| ASSERT (Status == EFI_SUCCESS); | |
| APsStackStartAddress = PhysicalEnd - APS_STACK_SIZE (CpusNum); | |
| } else { | |
| PhysicalEnd = 0; | |
| APsStackStartAddress = 0; | |
| } | |
| Status = AcceptMemory (VmmHobList, CpusNum, APsStackStartAddress, PhysicalEnd); | |
| ASSERT (Status == EFI_SUCCESS); | |
| return Status; | |
| } | |
| /** | |
| In Tdx guest, some information need to be passed from host VMM to guest | |
| firmware. For example, the memory resource, etc. These information are | |
| prepared by host VMM and put in TdHob which is described in TdxMetadata. | |
| TDVF processes the TdHob to accept memories. | |
| @retval EFI_SUCCESS Successfully process the TdHob | |
| @retval Others Other error as indicated | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| TdxHelperProcessTdHob ( | |
| VOID | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| VOID *TdHob; | |
| TD_RETURN_DATA TdReturnData; | |
| TdHob = (VOID *)(UINTN)FixedPcdGet32 (PcdOvmfSecGhcbBase); | |
| Status = TdCall (TDCALL_TDINFO, 0, 0, 0, &TdReturnData); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| DEBUG (( | |
| DEBUG_INFO, | |
| "Intel Tdx Started with (GPAW: %d, Cpus: %d)\n", | |
| TdReturnData.TdInfo.Gpaw, | |
| TdReturnData.TdInfo.NumVcpus | |
| )); | |
| // | |
| // Validate HobList | |
| // | |
| if (ValidateHobList (TdHob) == FALSE) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Process Hoblist to accept memory | |
| // | |
| Status = ProcessHobList (TdHob); | |
| return Status; | |
| } | |
| /** | |
| * Calculate the sha384 of input Data and extend it to RTMR register. | |
| * | |
| * @param RtmrIndex Index of the RTMR register | |
| * @param DataToHash Data to be hashed | |
| * @param DataToHashLen Length of the data | |
| * @param Digest Hash value of the input data | |
| * @param DigestLen Length of the hash value | |
| * | |
| * @retval EFI_SUCCESS Successfully hash and extend to RTMR | |
| * @retval Others Other errors as indicated | |
| */ | |
| STATIC | |
| EFI_STATUS | |
| HashAndExtendToRtmr ( | |
| IN UINT32 RtmrIndex, | |
| IN VOID *DataToHash, | |
| IN UINTN DataToHashLen, | |
| OUT UINT8 *Digest, | |
| IN UINTN DigestLen | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| if ((DataToHash == NULL) || (DataToHashLen == 0)) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| if ((Digest == NULL) || (DigestLen != SHA384_DIGEST_SIZE)) { | |
| return EFI_INVALID_PARAMETER; | |
| } | |
| // | |
| // Calculate the sha384 of the data | |
| // | |
| if (!Sha384HashAll (DataToHash, DataToHashLen, Digest)) { | |
| return EFI_ABORTED; | |
| } | |
| // | |
| // Extend to RTMR | |
| // | |
| Status = TdExtendRtmr ( | |
| (UINT32 *)Digest, | |
| SHA384_DIGEST_SIZE, | |
| (UINT8)RtmrIndex | |
| ); | |
| ASSERT (!EFI_ERROR (Status)); | |
| return Status; | |
| } | |
| /** | |
| In Tdx guest, TdHob is passed from host VMM to guest firmware and it contains | |
| the information of the memory resource. From the security perspective before | |
| it is consumed, it should be measured and extended. | |
| * | |
| * @retval EFI_SUCCESS Successfully measure the TdHob | |
| * @retval Others Other error as indicated | |
| */ | |
| EFI_STATUS | |
| EFIAPI | |
| TdxHelperMeasureTdHob ( | |
| VOID | |
| ) | |
| { | |
| EFI_PEI_HOB_POINTERS Hob; | |
| EFI_STATUS Status; | |
| UINT8 Digest[SHA384_DIGEST_SIZE]; | |
| OVMF_WORK_AREA *WorkArea; | |
| VOID *TdHob; | |
| TdHob = (VOID *)(UINTN)FixedPcdGet32 (PcdOvmfSecGhcbBase); | |
| Hob.Raw = (UINT8 *)TdHob; | |
| // | |
| // Walk thru the TdHob list until end of list. | |
| // | |
| while (!END_OF_HOB_LIST (Hob)) { | |
| Hob.Raw = GET_NEXT_HOB (Hob); | |
| } | |
| Status = HashAndExtendToRtmr ( | |
| 0, | |
| (UINT8 *)TdHob, | |
| (UINTN)((UINT8 *)Hob.Raw - (UINT8 *)TdHob), | |
| Digest, | |
| SHA384_DIGEST_SIZE | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| // | |
| // This function is called in SEC phase and at that moment the Hob service | |
| // is not available. So the TdHob measurement value is stored in workarea. | |
| // | |
| WorkArea = (OVMF_WORK_AREA *)FixedPcdGet32 (PcdOvmfWorkAreaBase); | |
| if (WorkArea == NULL) { | |
| return EFI_DEVICE_ERROR; | |
| } | |
| WorkArea->TdxWorkArea.SecTdxWorkArea.TdxMeasurementsData.MeasurementsBitmap |= TDX_MEASUREMENT_TDHOB_BITMASK; | |
| CopyMem (WorkArea->TdxWorkArea.SecTdxWorkArea.TdxMeasurementsData.TdHobHashValue, Digest, SHA384_DIGEST_SIZE); | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| * In Tdx guest, Configuration FV (CFV) is treated as external input because it | |
| * may contain the data provided by VMM. From the sucurity perspective Cfv image | |
| * should be measured before it is consumed. | |
| * | |
| * @retval EFI_SUCCESS Successfully measure the CFV image | |
| * @retval Others Other error as indicated | |
| */ | |
| EFI_STATUS | |
| EFIAPI | |
| TdxHelperMeasureCfvImage ( | |
| VOID | |
| ) | |
| { | |
| EFI_STATUS Status; | |
| UINT8 Digest[SHA384_DIGEST_SIZE]; | |
| OVMF_WORK_AREA *WorkArea; | |
| Status = HashAndExtendToRtmr ( | |
| 0, | |
| (UINT8 *)(UINTN)PcdGet32 (PcdOvmfFlashNvStorageVariableBase), | |
| (UINT64)PcdGet32 (PcdCfvRawDataSize), | |
| Digest, | |
| SHA384_DIGEST_SIZE | |
| ); | |
| if (EFI_ERROR (Status)) { | |
| return Status; | |
| } | |
| // | |
| // This function is called in SEC phase and at that moment the Hob service | |
| // is not available. So CfvImage measurement value is stored in workarea. | |
| // | |
| WorkArea = (OVMF_WORK_AREA *)FixedPcdGet32 (PcdOvmfWorkAreaBase); | |
| if (WorkArea == NULL) { | |
| return EFI_DEVICE_ERROR; | |
| } | |
| WorkArea->TdxWorkArea.SecTdxWorkArea.TdxMeasurementsData.MeasurementsBitmap |= TDX_MEASUREMENT_CFVIMG_BITMASK; | |
| CopyMem (WorkArea->TdxWorkArea.SecTdxWorkArea.TdxMeasurementsData.CfvImgHashValue, Digest, SHA384_DIGEST_SIZE); | |
| return EFI_SUCCESS; | |
| } | |
| /** | |
| Build the GuidHob for tdx measurements which were done in SEC phase. | |
| The measurement values are stored in WorkArea. | |
| @retval EFI_SUCCESS The GuidHob is built successfully | |
| @retval Others Other errors as indicated | |
| **/ | |
| EFI_STATUS | |
| EFIAPI | |
| TdxHelperBuildGuidHobForTdxMeasurement ( | |
| VOID | |
| ) | |
| { | |
| #ifdef TDX_PEI_LESS_BOOT | |
| return InternalBuildGuidHobForTdxMeasurement (); | |
| #else | |
| return EFI_UNSUPPORTED; | |
| #endif | |
| } |