diff options
Diffstat (limited to 'UefiCpuPkg/CpuMpPei/Microcode.c')
| -rw-r--r-- | UefiCpuPkg/CpuMpPei/Microcode.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/UefiCpuPkg/CpuMpPei/Microcode.c b/UefiCpuPkg/CpuMpPei/Microcode.c deleted file mode 100644 index 4fe6f2d8db..0000000000 --- a/UefiCpuPkg/CpuMpPei/Microcode.c +++ /dev/null @@ -1,213 +0,0 @@ -/** @file
- Implementation of loading microcode on processors.
-
- Copyright (c) 2015 - 2016, 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 "CpuMpPei.h"
-
-/**
- Get microcode update signature of currently loaded microcode update.
-
- @return Microcode signature.
-
-**/
-UINT32
-GetCurrentMicrocodeSignature (
- VOID
- )
-{
- UINT64 Signature;
-
- AsmWriteMsr64 (EFI_MSR_IA32_BIOS_SIGN_ID, 0);
- AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, NULL);
- Signature = AsmReadMsr64 (EFI_MSR_IA32_BIOS_SIGN_ID);
- return (UINT32) RShiftU64 (Signature, 32);
-}
-
-/**
- Detect whether specified processor can find matching microcode patch and load it.
-
- @param PeiCpuMpData Pointer to PEI CPU MP Data
-**/
-VOID
-MicrocodeDetect (
- IN PEI_CPU_MP_DATA *PeiCpuMpData
- )
-{
- UINT64 MicrocodePatchAddress;
- UINT64 MicrocodePatchRegionSize;
- UINT32 ExtendedTableLength;
- UINT32 ExtendedTableCount;
- EFI_CPU_MICROCODE_EXTENDED_TABLE *ExtendedTable;
- EFI_CPU_MICROCODE_EXTENDED_TABLE_HEADER *ExtendedTableHeader;
- EFI_CPU_MICROCODE_HEADER *MicrocodeEntryPoint;
- UINTN MicrocodeEnd;
- UINTN Index;
- UINT8 PlatformId;
- UINT32 RegEax;
- UINT32 CurrentRevision;
- UINT32 LatestRevision;
- UINTN TotalSize;
- UINT32 CheckSum32;
- BOOLEAN CorrectMicrocode;
- MICROCODE_INFO MicrocodeInfo;
-
- ZeroMem (&MicrocodeInfo, sizeof (MICROCODE_INFO));
- MicrocodePatchAddress = PcdGet64 (PcdCpuMicrocodePatchAddress);
- MicrocodePatchRegionSize = PcdGet64 (PcdCpuMicrocodePatchRegionSize);
- if (MicrocodePatchRegionSize == 0) {
- //
- // There is no microcode patches
- //
- return;
- }
-
- CurrentRevision = GetCurrentMicrocodeSignature ();
- if (CurrentRevision != 0) {
- //
- // Skip loading microcode if it has been loaded successfully
- //
- return;
- }
-
- ExtendedTableLength = 0;
- //
- // Here data of CPUID leafs have not been collected into context buffer, so
- // GetProcessorCpuid() cannot be used here to retrieve CPUID data.
- //
- AsmCpuid (CPUID_VERSION_INFO, &RegEax, NULL, NULL, NULL);
-
- //
- // The index of platform information resides in bits 50:52 of MSR IA32_PLATFORM_ID
- //
- PlatformId = (UINT8) AsmMsrBitFieldRead64 (EFI_MSR_IA32_PLATFORM_ID, 50, 52);
-
- LatestRevision = 0;
- MicrocodeEnd = (UINTN) (MicrocodePatchAddress + MicrocodePatchRegionSize);
- MicrocodeEntryPoint = (EFI_CPU_MICROCODE_HEADER *) (UINTN) MicrocodePatchAddress;
- do {
- //
- // Check if the microcode is for the Cpu and the version is newer
- // and the update can be processed on the platform
- //
- CorrectMicrocode = FALSE;
- if (MicrocodeEntryPoint->HeaderVersion == 0x1) {
- //
- // It is the microcode header. It is not the padding data between microcode patches
- // because the padding data should not include 0x00000001 and it should be the repeated
- // byte format (like 0xXYXYXYXY....).
- //
- if (MicrocodeEntryPoint->ProcessorId == RegEax &&
- MicrocodeEntryPoint->UpdateRevision > LatestRevision &&
- (MicrocodeEntryPoint->ProcessorFlags & (1 << PlatformId))
- ) {
- if (MicrocodeEntryPoint->DataSize == 0) {
- CheckSum32 = CalculateSum32 ((UINT32 *)MicrocodeEntryPoint, 2048);
- } else {
- CheckSum32 = CalculateSum32 ((UINT32 *)MicrocodeEntryPoint, MicrocodeEntryPoint->DataSize + sizeof(EFI_CPU_MICROCODE_HEADER));
- }
- if (CheckSum32 == 0) {
- CorrectMicrocode = TRUE;
- }
- } else if ((MicrocodeEntryPoint->DataSize != 0) &&
- (MicrocodeEntryPoint->UpdateRevision > LatestRevision)) {
- ExtendedTableLength = MicrocodeEntryPoint->TotalSize - (MicrocodeEntryPoint->DataSize + sizeof (EFI_CPU_MICROCODE_HEADER));
- if (ExtendedTableLength != 0) {
- //
- // Extended Table exist, check if the CPU in support list
- //
- ExtendedTableHeader = (EFI_CPU_MICROCODE_EXTENDED_TABLE_HEADER *)((UINT8 *)(MicrocodeEntryPoint) + MicrocodeEntryPoint->DataSize + sizeof (EFI_CPU_MICROCODE_HEADER));
- //
- // Calculate Extended Checksum
- //
- if ((ExtendedTableLength % 4) == 0) {
- CheckSum32 = CalculateSum32 ((UINT32 *)ExtendedTableHeader, ExtendedTableLength);
- if (CheckSum32 == 0) {
- //
- // Checksum correct
- //
- ExtendedTableCount = ExtendedTableHeader->ExtendedSignatureCount;
- ExtendedTable = (EFI_CPU_MICROCODE_EXTENDED_TABLE *)(ExtendedTableHeader + 1);
- for (Index = 0; Index < ExtendedTableCount; Index ++) {
- CheckSum32 = CalculateSum32 ((UINT32 *)ExtendedTable, sizeof(EFI_CPU_MICROCODE_EXTENDED_TABLE));
- if (CheckSum32 == 0) {
- //
- // Verify Header
- //
- if ((ExtendedTable->ProcessorSignature == RegEax) &&
- (ExtendedTable->ProcessorFlag & (1 << PlatformId)) ) {
- //
- // Find one
- //
- CorrectMicrocode = TRUE;
- break;
- }
- }
- ExtendedTable ++;
- }
- }
- }
- }
- }
- } else {
- //
- // It is the padding data between the microcode patches for microcode patches alignment.
- // Because the microcode patch is the multiple of 1-KByte, the padding data should not
- // exist if the microcode patch alignment value is not larger than 1-KByte. So, the microcode
- // alignment value should be larger than 1-KByte. We could skip SIZE_1KB padding data to
- // find the next possible microcode patch header.
- //
- MicrocodeEntryPoint = (EFI_CPU_MICROCODE_HEADER *) (((UINTN) MicrocodeEntryPoint) + SIZE_1KB);
- continue;
- }
- //
- // Get the next patch.
- //
- if (MicrocodeEntryPoint->DataSize == 0) {
- TotalSize = 2048;
- } else {
- TotalSize = MicrocodeEntryPoint->TotalSize;
- }
-
- if (CorrectMicrocode) {
- LatestRevision = MicrocodeEntryPoint->UpdateRevision;
- MicrocodeInfo.MicrocodeData = (VOID *)((UINTN)MicrocodeEntryPoint + sizeof (EFI_CPU_MICROCODE_HEADER));
- MicrocodeInfo.MicrocodeSize = TotalSize;
- MicrocodeInfo.ProcessorId = RegEax;
- }
-
- MicrocodeEntryPoint = (EFI_CPU_MICROCODE_HEADER *) (((UINTN) MicrocodeEntryPoint) + TotalSize);
- } while (((UINTN) MicrocodeEntryPoint < MicrocodeEnd));
-
- if (LatestRevision > CurrentRevision) {
- //
- // BIOS only authenticate updates that contain a numerically larger revision
- // than the currently loaded revision, where Current Signature < New Update
- // Revision. A processor with no loaded update is considered to have a
- // revision equal to zero.
- //
- AsmWriteMsr64 (
- EFI_MSR_IA32_BIOS_UPDT_TRIG,
- (UINT64) (UINTN) MicrocodeInfo.MicrocodeData
- );
- //
- // Get and check new microcode signature
- //
- CurrentRevision = GetCurrentMicrocodeSignature ();
- if (CurrentRevision != LatestRevision) {
- AcquireSpinLock(&PeiCpuMpData->MpLock);
- DEBUG ((EFI_D_ERROR, "Updated microcode signature [0x%08x] does not match \
- loaded microcode signature [0x%08x]\n", CurrentRevision, LatestRevision));
- ReleaseSpinLock(&PeiCpuMpData->MpLock);
- }
- }
-}
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