d786a17232
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=2429 This commit will attempt to reduce the copy size when loading the microcode patches data from flash into memory. Such optimization is done by a pre-process of the microcode patch headers (on flash). A microcode patch will be loaded into memory only when the below 3 criteria are met: A. With a microcode patch header (which means the data is not padding data between microcode patches); B. The 'ProcessorSignature' & 'ProcessorFlags' fields in the header match at least one processor within system; C. If the Extended Signature Table exists in a microcode patch, the 'ProcessorSignature' & 'ProcessorFlag' fields in the table entries match at least one processor within system. Criterion B and C will require all the processors to be woken up once to collect their CPUID and Platform ID information. Hence, this commit will move the copy, detect and apply of microcode patch on BSP and APs after all the processors have been woken up. Cc: Eric Dong <eric.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Siyuan Fu <siyuan.fu@intel.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Hao A Wu <hao.a.wu@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com> Reviewed-by: Ray Ni <ray.ni@intel.com>
622 lines
23 KiB
C
622 lines
23 KiB
C
/** @file
|
|
Implementation of loading microcode on processors.
|
|
|
|
Copyright (c) 2015 - 2019, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include "MpLib.h"
|
|
|
|
/**
|
|
Get microcode update signature of currently loaded microcode update.
|
|
|
|
@return Microcode signature.
|
|
**/
|
|
UINT32
|
|
GetCurrentMicrocodeSignature (
|
|
VOID
|
|
)
|
|
{
|
|
MSR_IA32_BIOS_SIGN_ID_REGISTER BiosSignIdMsr;
|
|
|
|
AsmWriteMsr64 (MSR_IA32_BIOS_SIGN_ID, 0);
|
|
AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, NULL);
|
|
BiosSignIdMsr.Uint64 = AsmReadMsr64 (MSR_IA32_BIOS_SIGN_ID);
|
|
return BiosSignIdMsr.Bits.MicrocodeUpdateSignature;
|
|
}
|
|
|
|
/**
|
|
Detect whether specified processor can find matching microcode patch and load it.
|
|
|
|
Microcode Payload as the following format:
|
|
+----------------------------------------+------------------+
|
|
| CPU_MICROCODE_HEADER | |
|
|
+----------------------------------------+ CheckSum Part1 |
|
|
| Microcode Binary | |
|
|
+----------------------------------------+------------------+
|
|
| CPU_MICROCODE_EXTENDED_TABLE_HEADER | |
|
|
+----------------------------------------+ CheckSum Part2 |
|
|
| CPU_MICROCODE_EXTENDED_TABLE | |
|
|
| ... | |
|
|
+----------------------------------------+------------------+
|
|
|
|
There may by multiple CPU_MICROCODE_EXTENDED_TABLE in this format.
|
|
The count of CPU_MICROCODE_EXTENDED_TABLE is indicated by ExtendedSignatureCount
|
|
of CPU_MICROCODE_EXTENDED_TABLE_HEADER structure.
|
|
|
|
When we are trying to verify the CheckSum32 with extended table.
|
|
We should use the fields of exnteded table to replace the corresponding
|
|
fields in CPU_MICROCODE_HEADER structure, and recalculate the
|
|
CheckSum32 with CPU_MICROCODE_HEADER + Microcode Binary. We named
|
|
it as CheckSum Part3.
|
|
|
|
The CheckSum Part2 is used to verify the CPU_MICROCODE_EXTENDED_TABLE_HEADER
|
|
and CPU_MICROCODE_EXTENDED_TABLE parts. We should make sure CheckSum Part2
|
|
is correct before we are going to verify each CPU_MICROCODE_EXTENDED_TABLE.
|
|
|
|
Only ProcessorSignature, ProcessorFlag and CheckSum are different between
|
|
CheckSum Part1 and CheckSum Part3. To avoid multiple computing CheckSum Part3.
|
|
Save an in-complete CheckSum32 from CheckSum Part1 for common parts.
|
|
When we are going to calculate CheckSum32, just should use the corresponding part
|
|
of the ProcessorSignature, ProcessorFlag and CheckSum with in-complete CheckSum32.
|
|
|
|
Notes: CheckSum32 is not a strong verification.
|
|
It does not guarantee that the data has not been modified.
|
|
CPU has its own mechanism to verify Microcode Binary part.
|
|
|
|
@param[in] CpuMpData The pointer to CPU MP Data structure.
|
|
@param[in] IsBspCallIn Indicate whether the caller is BSP or not.
|
|
**/
|
|
VOID
|
|
MicrocodeDetect (
|
|
IN CPU_MP_DATA *CpuMpData,
|
|
IN BOOLEAN IsBspCallIn
|
|
)
|
|
{
|
|
UINT32 ExtendedTableLength;
|
|
UINT32 ExtendedTableCount;
|
|
CPU_MICROCODE_EXTENDED_TABLE *ExtendedTable;
|
|
CPU_MICROCODE_EXTENDED_TABLE_HEADER *ExtendedTableHeader;
|
|
CPU_MICROCODE_HEADER *MicrocodeEntryPoint;
|
|
UINTN MicrocodeEnd;
|
|
UINTN Index;
|
|
UINT8 PlatformId;
|
|
CPUID_VERSION_INFO_EAX Eax;
|
|
UINT32 CurrentRevision;
|
|
UINT32 LatestRevision;
|
|
UINTN TotalSize;
|
|
UINT32 CheckSum32;
|
|
UINT32 InCompleteCheckSum32;
|
|
BOOLEAN CorrectMicrocode;
|
|
VOID *MicrocodeData;
|
|
MSR_IA32_PLATFORM_ID_REGISTER PlatformIdMsr;
|
|
UINT32 ProcessorFlags;
|
|
UINT32 ThreadId;
|
|
|
|
//
|
|
// set ProcessorFlags to suppress incorrect compiler/analyzer warnings
|
|
//
|
|
ProcessorFlags = 0;
|
|
|
|
if (CpuMpData->MicrocodePatchRegionSize == 0) {
|
|
//
|
|
// There is no microcode patches
|
|
//
|
|
return;
|
|
}
|
|
|
|
CurrentRevision = GetCurrentMicrocodeSignature ();
|
|
if (CurrentRevision != 0 && !IsBspCallIn) {
|
|
//
|
|
// Skip loading microcode if it has been loaded successfully
|
|
//
|
|
return;
|
|
}
|
|
|
|
GetProcessorLocationByApicId (GetInitialApicId (), NULL, NULL, &ThreadId);
|
|
if (ThreadId != 0) {
|
|
//
|
|
// Skip loading microcode if it is not the first thread in one core.
|
|
//
|
|
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, &Eax.Uint32, NULL, NULL, NULL);
|
|
|
|
//
|
|
// The index of platform information resides in bits 50:52 of MSR IA32_PLATFORM_ID
|
|
//
|
|
PlatformIdMsr.Uint64 = AsmReadMsr64 (MSR_IA32_PLATFORM_ID);
|
|
PlatformId = (UINT8) PlatformIdMsr.Bits.PlatformId;
|
|
|
|
//
|
|
// Check whether AP has same processor with BSP.
|
|
// If yes, direct use microcode info saved by BSP.
|
|
//
|
|
if (!IsBspCallIn) {
|
|
if ((CpuMpData->ProcessorSignature == Eax.Uint32) &&
|
|
(CpuMpData->ProcessorFlags & (1 << PlatformId)) != 0) {
|
|
MicrocodeData = (VOID *)(UINTN) CpuMpData->MicrocodeDataAddress;
|
|
LatestRevision = CpuMpData->MicrocodeRevision;
|
|
goto Done;
|
|
}
|
|
}
|
|
|
|
LatestRevision = 0;
|
|
MicrocodeData = NULL;
|
|
MicrocodeEnd = (UINTN) (CpuMpData->MicrocodePatchAddress + CpuMpData->MicrocodePatchRegionSize);
|
|
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN) CpuMpData->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->DataSize == 0) {
|
|
TotalSize = sizeof (CPU_MICROCODE_HEADER) + 2000;
|
|
} else {
|
|
TotalSize = sizeof (CPU_MICROCODE_HEADER) + MicrocodeEntryPoint->DataSize;
|
|
}
|
|
|
|
///
|
|
/// 0x0 MicrocodeBegin MicrocodeEntry MicrocodeEnd 0xffffffff
|
|
/// |--------------|---------------|---------------|---------------|
|
|
/// valid TotalSize
|
|
/// TotalSize is only valid between 0 and (MicrocodeEnd - MicrocodeEntry).
|
|
/// And it should be aligned with 4 bytes.
|
|
/// If the TotalSize is invalid, skip 1KB to check next entry.
|
|
///
|
|
if ( (UINTN)MicrocodeEntryPoint > (MAX_ADDRESS - TotalSize) ||
|
|
((UINTN)MicrocodeEntryPoint + TotalSize) > MicrocodeEnd ||
|
|
(TotalSize & 0x3) != 0
|
|
) {
|
|
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (((UINTN) MicrocodeEntryPoint) + SIZE_1KB);
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// Save an in-complete CheckSum32 from CheckSum Part1 for common parts.
|
|
//
|
|
InCompleteCheckSum32 = CalculateSum32 (
|
|
(UINT32 *) MicrocodeEntryPoint,
|
|
TotalSize
|
|
);
|
|
InCompleteCheckSum32 -= MicrocodeEntryPoint->ProcessorSignature.Uint32;
|
|
InCompleteCheckSum32 -= MicrocodeEntryPoint->ProcessorFlags;
|
|
InCompleteCheckSum32 -= MicrocodeEntryPoint->Checksum;
|
|
|
|
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->ProcessorSignature.Uint32 == Eax.Uint32 &&
|
|
MicrocodeEntryPoint->UpdateRevision > LatestRevision &&
|
|
(MicrocodeEntryPoint->ProcessorFlags & (1 << PlatformId))
|
|
) {
|
|
//
|
|
// Calculate CheckSum Part1.
|
|
//
|
|
CheckSum32 = InCompleteCheckSum32;
|
|
CheckSum32 += MicrocodeEntryPoint->ProcessorSignature.Uint32;
|
|
CheckSum32 += MicrocodeEntryPoint->ProcessorFlags;
|
|
CheckSum32 += MicrocodeEntryPoint->Checksum;
|
|
if (CheckSum32 == 0) {
|
|
CorrectMicrocode = TRUE;
|
|
ProcessorFlags = MicrocodeEntryPoint->ProcessorFlags;
|
|
}
|
|
} else if ((MicrocodeEntryPoint->DataSize != 0) &&
|
|
(MicrocodeEntryPoint->UpdateRevision > LatestRevision)) {
|
|
ExtendedTableLength = MicrocodeEntryPoint->TotalSize - (MicrocodeEntryPoint->DataSize +
|
|
sizeof (CPU_MICROCODE_HEADER));
|
|
if (ExtendedTableLength != 0) {
|
|
//
|
|
// Extended Table exist, check if the CPU in support list
|
|
//
|
|
ExtendedTableHeader = (CPU_MICROCODE_EXTENDED_TABLE_HEADER *) ((UINT8 *) (MicrocodeEntryPoint)
|
|
+ MicrocodeEntryPoint->DataSize + sizeof (CPU_MICROCODE_HEADER));
|
|
//
|
|
// Calculate Extended Checksum
|
|
//
|
|
if ((ExtendedTableLength % 4) == 0) {
|
|
//
|
|
// Calculate CheckSum Part2.
|
|
//
|
|
CheckSum32 = CalculateSum32 ((UINT32 *) ExtendedTableHeader, ExtendedTableLength);
|
|
if (CheckSum32 == 0) {
|
|
//
|
|
// Checksum correct
|
|
//
|
|
ExtendedTableCount = ExtendedTableHeader->ExtendedSignatureCount;
|
|
ExtendedTable = (CPU_MICROCODE_EXTENDED_TABLE *) (ExtendedTableHeader + 1);
|
|
for (Index = 0; Index < ExtendedTableCount; Index ++) {
|
|
//
|
|
// Calculate CheckSum Part3.
|
|
//
|
|
CheckSum32 = InCompleteCheckSum32;
|
|
CheckSum32 += ExtendedTable->ProcessorSignature.Uint32;
|
|
CheckSum32 += ExtendedTable->ProcessorFlag;
|
|
CheckSum32 += ExtendedTable->Checksum;
|
|
if (CheckSum32 == 0) {
|
|
//
|
|
// Verify Header
|
|
//
|
|
if ((ExtendedTable->ProcessorSignature.Uint32 == Eax.Uint32) &&
|
|
(ExtendedTable->ProcessorFlag & (1 << PlatformId)) ) {
|
|
//
|
|
// Find one
|
|
//
|
|
CorrectMicrocode = TRUE;
|
|
ProcessorFlags = ExtendedTable->ProcessorFlag;
|
|
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 = (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;
|
|
MicrocodeData = (VOID *) ((UINTN) MicrocodeEntryPoint + sizeof (CPU_MICROCODE_HEADER));
|
|
}
|
|
|
|
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (((UINTN) MicrocodeEntryPoint) + TotalSize);
|
|
} while (((UINTN) MicrocodeEntryPoint < MicrocodeEnd));
|
|
|
|
Done:
|
|
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.
|
|
//
|
|
ASSERT (MicrocodeData != NULL);
|
|
AsmWriteMsr64 (
|
|
MSR_IA32_BIOS_UPDT_TRIG,
|
|
(UINT64) (UINTN) MicrocodeData
|
|
);
|
|
//
|
|
// Get and check new microcode signature
|
|
//
|
|
CurrentRevision = GetCurrentMicrocodeSignature ();
|
|
if (CurrentRevision != LatestRevision) {
|
|
AcquireSpinLock(&CpuMpData->MpLock);
|
|
DEBUG ((EFI_D_ERROR, "Updated microcode signature [0x%08x] does not match \
|
|
loaded microcode signature [0x%08x]\n", CurrentRevision, LatestRevision));
|
|
ReleaseSpinLock(&CpuMpData->MpLock);
|
|
}
|
|
}
|
|
|
|
if (IsBspCallIn && (LatestRevision != 0)) {
|
|
//
|
|
// Save BSP processor info and microcode info for later AP use.
|
|
//
|
|
CpuMpData->ProcessorSignature = Eax.Uint32;
|
|
CpuMpData->ProcessorFlags = ProcessorFlags;
|
|
CpuMpData->MicrocodeDataAddress = (UINTN) MicrocodeData;
|
|
CpuMpData->MicrocodeRevision = LatestRevision;
|
|
DEBUG ((DEBUG_INFO, "BSP Microcode:: signature [0x%08x], ProcessorFlags [0x%08x], \
|
|
MicroData [0x%08x], Revision [0x%08x]\n", Eax.Uint32, ProcessorFlags, (UINTN) MicrocodeData, LatestRevision));
|
|
}
|
|
}
|
|
|
|
/**
|
|
Determine if a microcode patch will be loaded into memory.
|
|
|
|
@param[in] CpuMpData The pointer to CPU MP Data structure.
|
|
@param[in] ProcessorSignature The processor signature field value
|
|
supported by a microcode patch.
|
|
@param[in] ProcessorFlags The prcessor flags field value supported by
|
|
a microcode patch.
|
|
|
|
@retval TRUE The specified microcode patch will be loaded.
|
|
@retval FALSE The specified microcode patch will not be loaded.
|
|
**/
|
|
BOOLEAN
|
|
IsMicrocodePatchNeedLoad (
|
|
IN CPU_MP_DATA *CpuMpData,
|
|
IN UINT32 ProcessorSignature,
|
|
IN UINT32 ProcessorFlags
|
|
)
|
|
{
|
|
UINTN Index;
|
|
CPU_AP_DATA *CpuData;
|
|
|
|
for (Index = 0; Index < CpuMpData->CpuCount; Index++) {
|
|
CpuData = &CpuMpData->CpuData[Index];
|
|
if ((ProcessorSignature == CpuData->ProcessorSignature) &&
|
|
(ProcessorFlags & (1 << CpuData->PlatformId)) != 0) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
Actual worker function that loads the required microcode patches into memory.
|
|
|
|
@param[in, out] CpuMpData The pointer to CPU MP Data structure.
|
|
@param[in] Patches The pointer to an array of information on
|
|
the microcode patches that will be loaded
|
|
into memory.
|
|
@param[in] PatchCount The number of microcode patches that will
|
|
be loaded into memory.
|
|
@param[in] TotalLoadSize The total size of all the microcode patches
|
|
to be loaded.
|
|
**/
|
|
VOID
|
|
LoadMicrocodePatchWorker (
|
|
IN OUT CPU_MP_DATA *CpuMpData,
|
|
IN MICROCODE_PATCH_INFO *Patches,
|
|
IN UINTN PatchCount,
|
|
IN UINTN TotalLoadSize
|
|
)
|
|
{
|
|
UINTN Index;
|
|
VOID *MicrocodePatchInRam;
|
|
UINT8 *Walker;
|
|
|
|
ASSERT ((Patches != NULL) && (PatchCount != 0));
|
|
|
|
MicrocodePatchInRam = AllocatePages (EFI_SIZE_TO_PAGES (TotalLoadSize));
|
|
if (MicrocodePatchInRam == NULL) {
|
|
return;
|
|
}
|
|
|
|
//
|
|
// Load all the required microcode patches into memory
|
|
//
|
|
for (Walker = MicrocodePatchInRam, Index = 0; Index < PatchCount; Index++) {
|
|
CopyMem (
|
|
Walker,
|
|
(VOID *) Patches[Index].Address,
|
|
Patches[Index].Size
|
|
);
|
|
|
|
//
|
|
// Zero-fill the padding area
|
|
// Please note that AlignedSize will be no less than Size
|
|
//
|
|
ZeroMem (
|
|
Walker + Patches[Index].Size,
|
|
Patches[Index].AlignedSize - Patches[Index].Size
|
|
);
|
|
|
|
Walker += Patches[Index].AlignedSize;
|
|
}
|
|
|
|
//
|
|
// Update the microcode patch related fields in CpuMpData
|
|
//
|
|
CpuMpData->MicrocodePatchAddress = (UINTN) MicrocodePatchInRam;
|
|
CpuMpData->MicrocodePatchRegionSize = TotalLoadSize;
|
|
|
|
DEBUG ((
|
|
DEBUG_INFO,
|
|
"%a: Required microcode patches have been loaded at 0x%lx, with size 0x%lx.\n",
|
|
__FUNCTION__, CpuMpData->MicrocodePatchAddress, CpuMpData->MicrocodePatchRegionSize
|
|
));
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
Load the required microcode patches data into memory.
|
|
|
|
@param[in, out] CpuMpData The pointer to CPU MP Data structure.
|
|
**/
|
|
VOID
|
|
LoadMicrocodePatch (
|
|
IN OUT CPU_MP_DATA *CpuMpData
|
|
)
|
|
{
|
|
CPU_MICROCODE_HEADER *MicrocodeEntryPoint;
|
|
UINTN MicrocodeEnd;
|
|
UINTN DataSize;
|
|
UINTN TotalSize;
|
|
CPU_MICROCODE_EXTENDED_TABLE_HEADER *ExtendedTableHeader;
|
|
UINT32 ExtendedTableCount;
|
|
CPU_MICROCODE_EXTENDED_TABLE *ExtendedTable;
|
|
MICROCODE_PATCH_INFO *PatchInfoBuffer;
|
|
UINTN MaxPatchNumber;
|
|
UINTN PatchCount;
|
|
UINTN TotalLoadSize;
|
|
UINTN Index;
|
|
BOOLEAN NeedLoad;
|
|
|
|
//
|
|
// Initialize the microcode patch related fields in CpuMpData as the values
|
|
// specified by the PCD pair. If the microcode patches are loaded into memory,
|
|
// these fields will be updated.
|
|
//
|
|
CpuMpData->MicrocodePatchAddress = PcdGet64 (PcdCpuMicrocodePatchAddress);
|
|
CpuMpData->MicrocodePatchRegionSize = PcdGet64 (PcdCpuMicrocodePatchRegionSize);
|
|
|
|
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN) CpuMpData->MicrocodePatchAddress;
|
|
MicrocodeEnd = (UINTN) MicrocodeEntryPoint +
|
|
(UINTN) CpuMpData->MicrocodePatchRegionSize;
|
|
if ((MicrocodeEntryPoint == NULL) || ((UINTN) MicrocodeEntryPoint == MicrocodeEnd)) {
|
|
//
|
|
// There is no microcode patches
|
|
//
|
|
return;
|
|
}
|
|
|
|
PatchCount = 0;
|
|
MaxPatchNumber = DEFAULT_MAX_MICROCODE_PATCH_NUM;
|
|
TotalLoadSize = 0;
|
|
PatchInfoBuffer = AllocatePool (MaxPatchNumber * sizeof (MICROCODE_PATCH_INFO));
|
|
if (PatchInfoBuffer == NULL) {
|
|
return;
|
|
}
|
|
|
|
//
|
|
// Process the header of each microcode patch within the region.
|
|
// The purpose is to decide which microcode patch(es) will be loaded into memory.
|
|
//
|
|
do {
|
|
if (MicrocodeEntryPoint->HeaderVersion != 0x1) {
|
|
//
|
|
// Padding data between the microcode patches, skip 1KB to check next entry.
|
|
//
|
|
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (((UINTN) MicrocodeEntryPoint) + SIZE_1KB);
|
|
continue;
|
|
}
|
|
|
|
DataSize = MicrocodeEntryPoint->DataSize;
|
|
TotalSize = (DataSize == 0) ? 2048 : MicrocodeEntryPoint->TotalSize;
|
|
if ( (UINTN)MicrocodeEntryPoint > (MAX_ADDRESS - TotalSize) ||
|
|
((UINTN)MicrocodeEntryPoint + TotalSize) > MicrocodeEnd ||
|
|
(DataSize & 0x3) != 0 ||
|
|
(TotalSize & (SIZE_1KB - 1)) != 0 ||
|
|
TotalSize < DataSize
|
|
) {
|
|
//
|
|
// Not a valid microcode header, skip 1KB to check next entry.
|
|
//
|
|
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (((UINTN) MicrocodeEntryPoint) + SIZE_1KB);
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// Check the 'ProcessorSignature' and 'ProcessorFlags' of the microcode
|
|
// patch header with the CPUID and PlatformID of the processors within
|
|
// system to decide if it will be copied into memory
|
|
//
|
|
NeedLoad = IsMicrocodePatchNeedLoad (
|
|
CpuMpData,
|
|
MicrocodeEntryPoint->ProcessorSignature.Uint32,
|
|
MicrocodeEntryPoint->ProcessorFlags
|
|
);
|
|
|
|
//
|
|
// If the Extended Signature Table exists, check if the processor is in the
|
|
// support list
|
|
//
|
|
if ((!NeedLoad) && (DataSize != 0) &&
|
|
(TotalSize - DataSize > sizeof (CPU_MICROCODE_HEADER) +
|
|
sizeof (CPU_MICROCODE_EXTENDED_TABLE_HEADER))) {
|
|
ExtendedTableHeader = (CPU_MICROCODE_EXTENDED_TABLE_HEADER *) ((UINT8 *) (MicrocodeEntryPoint)
|
|
+ DataSize + sizeof (CPU_MICROCODE_HEADER));
|
|
ExtendedTableCount = ExtendedTableHeader->ExtendedSignatureCount;
|
|
ExtendedTable = (CPU_MICROCODE_EXTENDED_TABLE *) (ExtendedTableHeader + 1);
|
|
|
|
for (Index = 0; Index < ExtendedTableCount; Index ++) {
|
|
//
|
|
// Avoid access content beyond MicrocodeEnd
|
|
//
|
|
if ((UINTN) ExtendedTable > MicrocodeEnd - sizeof (CPU_MICROCODE_EXTENDED_TABLE)) {
|
|
break;
|
|
}
|
|
|
|
//
|
|
// Check the 'ProcessorSignature' and 'ProcessorFlag' of the Extended
|
|
// Signature Table entry with the CPUID and PlatformID of the processors
|
|
// within system to decide if it will be copied into memory
|
|
//
|
|
NeedLoad = IsMicrocodePatchNeedLoad (
|
|
CpuMpData,
|
|
ExtendedTable->ProcessorSignature.Uint32,
|
|
ExtendedTable->ProcessorFlag
|
|
);
|
|
if (NeedLoad) {
|
|
break;
|
|
}
|
|
ExtendedTable ++;
|
|
}
|
|
}
|
|
|
|
if (NeedLoad) {
|
|
PatchCount++;
|
|
if (PatchCount > MaxPatchNumber) {
|
|
//
|
|
// Current 'PatchInfoBuffer' cannot hold the information, double the size
|
|
// and allocate a new buffer.
|
|
//
|
|
if (MaxPatchNumber > MAX_UINTN / 2 / sizeof (MICROCODE_PATCH_INFO)) {
|
|
//
|
|
// Overflow check for MaxPatchNumber
|
|
//
|
|
goto OnExit;
|
|
}
|
|
|
|
PatchInfoBuffer = ReallocatePool (
|
|
MaxPatchNumber * sizeof (MICROCODE_PATCH_INFO),
|
|
2 * MaxPatchNumber * sizeof (MICROCODE_PATCH_INFO),
|
|
PatchInfoBuffer
|
|
);
|
|
if (PatchInfoBuffer == NULL) {
|
|
goto OnExit;
|
|
}
|
|
MaxPatchNumber = MaxPatchNumber * 2;
|
|
}
|
|
|
|
//
|
|
// Store the information of this microcode patch
|
|
//
|
|
if (TotalSize > ALIGN_VALUE (TotalSize, SIZE_1KB) ||
|
|
ALIGN_VALUE (TotalSize, SIZE_1KB) > MAX_UINTN - TotalLoadSize) {
|
|
goto OnExit;
|
|
}
|
|
PatchInfoBuffer[PatchCount - 1].Address = (UINTN) MicrocodeEntryPoint;
|
|
PatchInfoBuffer[PatchCount - 1].Size = TotalSize;
|
|
PatchInfoBuffer[PatchCount - 1].AlignedSize = ALIGN_VALUE (TotalSize, SIZE_1KB);
|
|
TotalLoadSize += PatchInfoBuffer[PatchCount - 1].AlignedSize;
|
|
}
|
|
|
|
//
|
|
// Process the next microcode patch
|
|
//
|
|
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (((UINTN) MicrocodeEntryPoint) + TotalSize);
|
|
} while (((UINTN) MicrocodeEntryPoint < MicrocodeEnd));
|
|
|
|
if (PatchCount != 0) {
|
|
DEBUG ((
|
|
DEBUG_INFO,
|
|
"%a: 0x%x microcode patches will be loaded into memory, with size 0x%x.\n",
|
|
__FUNCTION__, PatchCount, TotalLoadSize
|
|
));
|
|
|
|
LoadMicrocodePatchWorker (CpuMpData, PatchInfoBuffer, PatchCount, TotalLoadSize);
|
|
}
|
|
|
|
OnExit:
|
|
if (PatchInfoBuffer != NULL) {
|
|
FreePool (PatchInfoBuffer);
|
|
}
|
|
return;
|
|
}
|