From: Jiewen Yao <jiewen.yao@intel.com>
To: edk2-devel@lists.01.org
Cc: Jeff Fan <jeff.fan@intel.com>, Star Zeng <star.zeng@intel.com>
Subject: [PATCH] UefiCpuPkg/MicrocodeUpdate: enhance flash write logic
Date: Mon, 26 Dec 2016 23:40:28 +0800 [thread overview]
Message-ID: <1482766828-11180-1-git-send-email-jiewen.yao@intel.com> (raw)
The patch updated MicrocodeWrite() to move the Microcode replacement logic
to a standalone function - UpdateMicrocodeFlashRegion().
More detail description is added in UpdateMicrocodeFlashRegion()
to improve readability.
The Microcode information is collected in InitializeMicrocodeDescriptor(),
so that FmpGetImage() can get the info directly.
MicrocodeRead() is not needed any more.
Cc: Jeff Fan <jeff.fan@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
---
UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeFmp.c | 40 +-
UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.c | 614 ++++++++++++++------
UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.h | 79 +--
3 files changed, 502 insertions(+), 231 deletions(-)
diff --git a/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeFmp.c b/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeFmp.c
index df3563d..36ba39f 100644
--- a/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeFmp.c
+++ b/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeFmp.c
@@ -174,7 +174,7 @@ FmpGetImage (
)
{
MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate;
- EFI_STATUS Status;
+ MICROCODE_INFO *MicrocodeInfo;
if (Image == NULL || ImageSize == NULL) {
return EFI_INVALID_PARAMETER;
@@ -186,8 +186,16 @@ FmpGetImage (
return EFI_INVALID_PARAMETER;
}
- Status = MicrocodeRead(ImageIndex, (VOID *)Image, ImageSize);
- return Status;
+ MicrocodeInfo = &MicrocodeFmpPrivate->MicrocodeInfo[ImageIndex - 1];
+
+ if (*ImageSize < MicrocodeInfo->TotalSize) {
+ *ImageSize = MicrocodeInfo->TotalSize;
+ return EFI_BUFFER_TOO_SMALL;
+ }
+
+ *ImageSize = MicrocodeInfo->TotalSize;
+ CopyMem (Image, MicrocodeInfo->MicrocodeEntryPoint, MicrocodeInfo->TotalSize);
+ return EFI_SUCCESS;
}
/**
@@ -263,7 +271,7 @@ FmpSetImage (
return EFI_INVALID_PARAMETER;
}
- Status = MicrocodeWrite(ImageIndex, (VOID *)Image, ImageSize, &MicrocodeFmpPrivate->LastAttempt.LastAttemptVersion, &MicrocodeFmpPrivate->LastAttempt.LastAttemptStatus, AbortReason);
+ Status = MicrocodeWrite(MicrocodeFmpPrivate, (VOID *)Image, ImageSize, &MicrocodeFmpPrivate->LastAttempt.LastAttemptVersion, &MicrocodeFmpPrivate->LastAttempt.LastAttemptStatus, AbortReason);
DEBUG((DEBUG_INFO, "SetImage - LastAttemp Version - 0x%x, State - 0x%x\n", MicrocodeFmpPrivate->LastAttempt.LastAttemptVersion, MicrocodeFmpPrivate->LastAttempt.LastAttemptStatus));
VarStatus = gRT->SetVariable(
MICROCODE_FMP_LAST_ATTEMPT_VARIABLE_NAME,
@@ -417,17 +425,29 @@ InitializeMicrocodeDescriptor (
IN MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate
)
{
- UINT8 CurrentMicrocodeCount;
+ UINT8 CurrentMicrocodeCount;
+ BOOLEAN Result;
- CurrentMicrocodeCount = (UINT8)GetMicrocodeInfo(NULL, 0);
+ Result = GetMicrocodeRegion(&MicrocodeFmpPrivate->MicrocodePatchAddress, &MicrocodeFmpPrivate->MicrocodePatchRegionSize);
+ if (!Result) {
+ DEBUG((DEBUG_ERROR, "Fail to get Microcode Region\n"));
+ return EFI_NOT_FOUND;
+ }
+
+ CurrentMicrocodeCount = (UINT8)GetMicrocodeInfo(0, NULL, NULL);
if (CurrentMicrocodeCount > MicrocodeFmpPrivate->DescriptorCount) {
if (MicrocodeFmpPrivate->ImageDescriptor != NULL) {
FreePool(MicrocodeFmpPrivate->ImageDescriptor);
MicrocodeFmpPrivate->ImageDescriptor = NULL;
}
+ if (MicrocodeFmpPrivate->MicrocodeInfo != NULL) {
+ FreePool(MicrocodeFmpPrivate->MicrocodeInfo);
+ MicrocodeFmpPrivate->MicrocodeInfo = NULL;
+ }
} else {
ZeroMem(MicrocodeFmpPrivate->ImageDescriptor, MicrocodeFmpPrivate->DescriptorCount * sizeof(EFI_FIRMWARE_IMAGE_DESCRIPTOR));
+ ZeroMem(MicrocodeFmpPrivate->MicrocodeInfo, MicrocodeFmpPrivate->DescriptorCount * sizeof(MICROCODE_INFO));
}
MicrocodeFmpPrivate->DescriptorCount = CurrentMicrocodeCount;
@@ -438,8 +458,14 @@ InitializeMicrocodeDescriptor (
return EFI_OUT_OF_RESOURCES;
}
}
+ if (MicrocodeFmpPrivate->MicrocodeInfo == NULL) {
+ MicrocodeFmpPrivate->MicrocodeInfo = AllocateZeroPool(MicrocodeFmpPrivate->DescriptorCount * sizeof(MICROCODE_INFO));
+ if (MicrocodeFmpPrivate->MicrocodeInfo == NULL) {
+ return EFI_OUT_OF_RESOURCES;
+ }
+ }
- CurrentMicrocodeCount = (UINT8)GetMicrocodeInfo(MicrocodeFmpPrivate->ImageDescriptor, MicrocodeFmpPrivate->DescriptorCount);
+ CurrentMicrocodeCount = (UINT8)GetMicrocodeInfo(MicrocodeFmpPrivate->DescriptorCount, MicrocodeFmpPrivate->ImageDescriptor, MicrocodeFmpPrivate->MicrocodeInfo);
ASSERT(CurrentMicrocodeCount == MicrocodeFmpPrivate->DescriptorCount);
return EFI_SUCCESS;
diff --git a/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.c b/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.c
index 2eb4ae4..c470925 100644
--- a/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.c
+++ b/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.c
@@ -21,6 +21,36 @@
#include "MicrocodeUpdate.h"
+
+/**
+ Verify Microcode.
+
+ Caution: This function may receive untrusted input.
+
+ @param[in] Image The Microcode image buffer.
+ @param[in] ImageSize The size of Microcode image buffer in bytes.
+ @param[in] TryLoad Try to load Microcode or not.
+ @param[out] LastAttemptStatus The last attempt status, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
+ @param[out] AbortReason A pointer to a pointer to a null-terminated string providing more
+ details for the aborted operation. The buffer is allocated by this function
+ with AllocatePool(), and it is the caller's responsibility to free it with a
+ call to FreePool().
+
+ @retval EFI_SUCCESS The Microcode image passes verification.
+ @retval EFI_VOLUME_CORRUPTED The Microcode image is corrupt.
+ @retval EFI_INCOMPATIBLE_VERSION The Microcode image version is incorrect.
+ @retval EFI_UNSUPPORTED The Microcode ProcessorSignature or ProcessorFlags is incorrect.
+ @retval EFI_SECURITY_VIOLATION The Microcode image fails to load.
+**/
+EFI_STATUS
+VerifyMicrocode (
+ IN VOID *Image,
+ IN UINTN ImageSize,
+ IN BOOLEAN TryLoad,
+ OUT UINT32 *LastAttemptStatus,
+ OUT CHAR16 **AbortReason
+ );
+
/**
Get Microcode Region.
@@ -32,14 +62,14 @@
**/
BOOLEAN
GetMicrocodeRegion (
- OUT UINT64 *MicrocodePatchAddress,
- OUT UINT64 *MicrocodePatchRegionSize
+ OUT VOID **MicrocodePatchAddress,
+ OUT UINTN *MicrocodePatchRegionSize
)
{
- *MicrocodePatchAddress = PcdGet64(PcdCpuMicrocodePatchAddress);
- *MicrocodePatchRegionSize = PcdGet64(PcdCpuMicrocodePatchRegionSize);
+ *MicrocodePatchAddress = (VOID *)(UINTN)PcdGet64(PcdCpuMicrocodePatchAddress);
+ *MicrocodePatchRegionSize = (UINTN)PcdGet64(PcdCpuMicrocodePatchRegionSize);
- if ((*MicrocodePatchAddress == 0) || (*MicrocodePatchRegionSize == 0)) {
+ if ((*MicrocodePatchAddress == NULL) || (*MicrocodePatchRegionSize == 0)) {
return FALSE;
}
@@ -114,40 +144,77 @@ LoadMicrocode (
}
/**
+ If the Microcode is used by current processor.
+
+ @param[in] MicrocodeEntryPoint The Microcode buffer
+
+ @retval TRUE The Microcode is used by current processor.
+ @retval FALSE The Microcode is NOT used by current processor.
+**/
+BOOLEAN
+IsMicrocodeInUse (
+ IN CPU_MICROCODE_HEADER *MicrocodeEntryPoint
+ )
+{
+ UINT32 AttemptStatus;
+ UINTN TotalSize;
+ EFI_STATUS Status;
+
+ if (MicrocodeEntryPoint->HeaderVersion == 0x1 && MicrocodeEntryPoint->LoaderRevision == 0x1) {
+ //
+ // It is the microcode header. It is not the padding data between microcode patches
+ // becasue the padding data should not include 0x00000001 and it should be the repeated
+ // byte format (like 0xXYXYXYXY....).
+ //
+ if (MicrocodeEntryPoint->DataSize == 0) {
+ TotalSize = 2048;
+ } else {
+ TotalSize = MicrocodeEntryPoint->TotalSize;
+ }
+ Status = VerifyMicrocode(MicrocodeEntryPoint, TotalSize, FALSE, &AttemptStatus, NULL);
+ if (!EFI_ERROR(Status)) {
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+/**
Get current Microcode information.
- @param[out] ImageDescriptor Microcode ImageDescriptor
@param[in] DescriptorCount The count of Microcode ImageDescriptor allocated.
+ @param[out] ImageDescriptor Microcode ImageDescriptor
+ @param[out] MicrocodeInfo Microcode information
@return Microcode count
**/
UINTN
GetMicrocodeInfo (
+ IN UINTN DescriptorCount, OPTIONAL
OUT EFI_FIRMWARE_IMAGE_DESCRIPTOR *ImageDescriptor, OPTIONAL
- IN UINTN DescriptorCount OPTIONAL
+ OUT MICROCODE_INFO *MicrocodeInfo OPTIONAL
)
{
BOOLEAN Result;
- UINT64 MicrocodePatchAddress;
- UINT64 MicrocodePatchRegionSize;
+ VOID *MicrocodePatchAddress;
+ UINTN MicrocodePatchRegionSize;
CPU_MICROCODE_HEADER *MicrocodeEntryPoint;
UINTN MicrocodeEnd;
UINTN TotalSize;
UINTN Count;
UINT64 ImageAttributes;
- UINT32 CurrentRevision;
+ BOOLEAN IsInUse;
Result = GetMicrocodeRegion(&MicrocodePatchAddress, &MicrocodePatchRegionSize);
if (!Result) {
DEBUG((DEBUG_ERROR, "Fail to get Microcode Region\n"));
return 0;
}
- DEBUG((DEBUG_INFO, "Microcode Region - 0x%lx - 0x%lx\n", MicrocodePatchAddress, MicrocodePatchRegionSize));
+ DEBUG((DEBUG_INFO, "Microcode Region - 0x%x - 0x%x\n", MicrocodePatchAddress, MicrocodePatchRegionSize));
Count = 0;
- CurrentRevision = GetCurrentMicrocodeSignature();
- MicrocodeEnd = (UINTN)(MicrocodePatchAddress + MicrocodePatchRegionSize);
+ MicrocodeEnd = (UINTN)MicrocodePatchAddress + MicrocodePatchRegionSize;
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *) (UINTN) MicrocodePatchAddress;
do {
if (MicrocodeEntryPoint->HeaderVersion == 0x1 && MicrocodeEntryPoint->LoaderRevision == 0x1) {
@@ -162,6 +229,8 @@ GetMicrocodeInfo (
TotalSize = MicrocodeEntryPoint->TotalSize;
}
+ IsInUse = IsMicrocodeInUse (MicrocodeEntryPoint);
+
if (ImageDescriptor != NULL && DescriptorCount > Count) {
ImageDescriptor[Count].ImageIndex = (UINT8)(Count + 1);
CopyGuid (&ImageDescriptor[Count].ImageTypeId, &gMicrocodeFmpImageTypeIdGuid);
@@ -171,7 +240,7 @@ GetMicrocodeInfo (
ImageDescriptor[Count].VersionName = NULL;
ImageDescriptor[Count].Size = TotalSize;
ImageAttributes = IMAGE_ATTRIBUTE_IMAGE_UPDATABLE | IMAGE_ATTRIBUTE_RESET_REQUIRED;
- if (CurrentRevision == MicrocodeEntryPoint->UpdateRevision) {
+ if (IsInUse) {
ImageAttributes |= IMAGE_ATTRIBUTE_IN_USE;
}
ImageDescriptor[Count].AttributesSupported = ImageAttributes | IMAGE_ATTRIBUTE_IN_USE;
@@ -182,6 +251,11 @@ GetMicrocodeInfo (
ImageDescriptor[Count].LastAttemptStatus = 0;
ImageDescriptor[Count].HardwareInstance = 0;
}
+ if (MicrocodeInfo != NULL && DescriptorCount > Count) {
+ MicrocodeInfo[Count].MicrocodeEntryPoint = MicrocodeEntryPoint;
+ MicrocodeInfo[Count].TotalSize = TotalSize;
+ MicrocodeInfo[Count].InUse = IsInUse;
+ }
} else {
//
// It is the padding data between the microcode patches for microcode patches alignment.
@@ -207,89 +281,6 @@ GetMicrocodeInfo (
}
/**
- Read Microcode.
-
- @param[in] ImageIndex The index of Microcode image.
- @param[in, out] Image The Microcode image buffer.
- @param[in, out] ImageSize The size of Microcode image buffer in bytes.
-
- @retval EFI_SUCCESS The Microcode image is read.
- @retval EFI_NOT_FOUND The Microcode image is not found.
-**/
-EFI_STATUS
-MicrocodeRead (
- IN UINTN ImageIndex,
- IN OUT VOID *Image,
- IN OUT UINTN *ImageSize
- )
-{
- BOOLEAN Result;
- UINT64 MicrocodePatchAddress;
- UINT64 MicrocodePatchRegionSize;
- CPU_MICROCODE_HEADER *MicrocodeEntryPoint;
- UINTN MicrocodeEnd;
- UINTN TotalSize;
- UINTN Count;
-
- Result = GetMicrocodeRegion(&MicrocodePatchAddress, &MicrocodePatchRegionSize);
- if (!Result) {
- DEBUG((DEBUG_ERROR, "Fail to get Microcode Region\n"));
- return EFI_NOT_FOUND;
- }
- DEBUG((DEBUG_INFO, "Microcode Region - 0x%lx - 0x%lx\n", MicrocodePatchAddress, MicrocodePatchRegionSize));
-
- Count = 0;
-
- MicrocodeEnd = (UINTN)(MicrocodePatchAddress + MicrocodePatchRegionSize);
- MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *)(UINTN)MicrocodePatchAddress;
- do {
- if (MicrocodeEntryPoint->HeaderVersion == 0x1 && MicrocodeEntryPoint->LoaderRevision == 0x1) {
- //
- // It is the microcode header. It is not the padding data between microcode patches
- // becasue the padding data should not include 0x00000001 and it should be the repeated
- // byte format (like 0xXYXYXYXY....).
- //
- if (MicrocodeEntryPoint->DataSize == 0) {
- TotalSize = 2048;
- } else {
- TotalSize = MicrocodeEntryPoint->TotalSize;
- }
-
- if (ImageIndex == Count + 1) {
- if (*ImageSize < TotalSize) {
- *ImageSize = TotalSize;
- return EFI_BUFFER_TOO_SMALL;
- }
- *ImageSize = TotalSize;
- CopyMem (Image, MicrocodeEntryPoint, TotalSize);
- return EFI_SUCCESS;
- }
-
- } 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;
- }
-
- Count++;
- ASSERT(Count < 0xFF);
-
- //
- // Get the next patch.
- //
- MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *)(((UINTN)MicrocodeEntryPoint) + TotalSize);
- } while (((UINTN)MicrocodeEntryPoint < MicrocodeEnd));
-
- return EFI_NOT_FOUND;
-}
-
-/**
Verify Microcode.
Caution: This function may receive untrusted input.
@@ -461,7 +452,9 @@ VerifyMicrocode (
}
}
if (!CorrectMicrocode) {
- DEBUG((DEBUG_ERROR, "VerifyMicrocode - fail on CurrentProcessorSignature/ProcessorFlags\n"));
+ if (TryLoad) {
+ DEBUG((DEBUG_ERROR, "VerifyMicrocode - fail on CurrentProcessorSignature/ProcessorFlags\n"));
+ }
*LastAttemptStatus = LAST_ATTEMPT_STATUS_ERROR_INCORRECT_VERSION;
if (AbortReason != NULL) {
if (MicrocodeEntryPoint->ProcessorSignature.Uint32 != CurrentProcessorSignature) {
@@ -479,7 +472,9 @@ VerifyMicrocode (
//
CurrentRevision = GetCurrentMicrocodeSignature();
if (MicrocodeEntryPoint->UpdateRevision < CurrentRevision) {
- DEBUG((DEBUG_ERROR, "VerifyMicrocode - fail on UpdateRevision\n"));
+ if (TryLoad) {
+ DEBUG((DEBUG_ERROR, "VerifyMicrocode - fail on UpdateRevision\n"));
+ }
*LastAttemptStatus = LAST_ATTEMPT_STATUS_ERROR_INCORRECT_VERSION;
if (AbortReason != NULL) {
*AbortReason = AllocateCopyPool(sizeof(L"IncorrectRevision"), L"IncorrectRevision");
@@ -508,33 +503,25 @@ VerifyMicrocode (
/**
Get current Microcode in used.
+ @param[in] MicrocodePatchAddress The address of Microcode
+ @param[in] MicrocodePatchRegionSize The region size of Microcode
+
@return current Microcode in used.
**/
VOID *
GetCurrentMicrocodeInUse (
- VOID
+ IN VOID *MicrocodePatchAddress,
+ IN UINTN MicrocodePatchRegionSize
)
{
- BOOLEAN Result;
- EFI_STATUS Status;
- UINT64 MicrocodePatchAddress;
- UINT64 MicrocodePatchRegionSize;
CPU_MICROCODE_HEADER *MicrocodeEntryPoint;
UINTN MicrocodeEnd;
UINTN TotalSize;
UINTN Count;
- UINT32 AttemptStatus;
-
- Result = GetMicrocodeRegion(&MicrocodePatchAddress, &MicrocodePatchRegionSize);
- if (!Result) {
- DEBUG((DEBUG_ERROR, "Fail to get Microcode Region\n"));
- return NULL;
- }
- DEBUG((DEBUG_INFO, "Microcode Region - 0x%lx - 0x%lx\n", MicrocodePatchAddress, MicrocodePatchRegionSize));
Count = 0;
- MicrocodeEnd = (UINTN)(MicrocodePatchAddress + MicrocodePatchRegionSize);
+ MicrocodeEnd = (UINTN)MicrocodePatchAddress + MicrocodePatchRegionSize;
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *)(UINTN)MicrocodePatchAddress;
do {
if (MicrocodeEntryPoint->HeaderVersion == 0x1 && MicrocodeEntryPoint->LoaderRevision == 0x1) {
@@ -548,8 +535,7 @@ GetCurrentMicrocodeInUse (
} else {
TotalSize = MicrocodeEntryPoint->TotalSize;
}
- Status = VerifyMicrocode(MicrocodeEntryPoint, TotalSize, FALSE, &AttemptStatus, NULL);
- if (!EFI_ERROR(Status)) {
+ if (IsMicrocodeInUse (MicrocodeEntryPoint)) {
return MicrocodeEntryPoint;
}
@@ -578,35 +564,83 @@ GetCurrentMicrocodeInUse (
}
/**
+ Get next Microcode entrypoint.
+
+ @param[in] MicrocodePatchAddress The address of Microcode
+ @param[in] MicrocodePatchRegionSize The region size of Microcode
+ @param[in] MicrocodeEntryPoint Current Microcode entrypoint
+
+ @return next Microcode entrypoint.
+**/
+CPU_MICROCODE_HEADER *
+GetNextMicrocode (
+ IN VOID *MicrocodePatchAddress,
+ IN UINTN MicrocodePatchRegionSize,
+ IN CPU_MICROCODE_HEADER *MicrocodeEntryPoint
+ )
+{
+ UINTN MicrocodeEnd;
+ UINTN TotalSize;
+
+ MicrocodeEnd = (UINTN)MicrocodePatchAddress + MicrocodePatchRegionSize;
+
+ if (MicrocodeEntryPoint->HeaderVersion == 0x1 && MicrocodeEntryPoint->LoaderRevision == 0x1) {
+ //
+ // It is the microcode header. It is not the padding data between microcode patches
+ // becasue the padding data should not include 0x00000001 and it should be the repeated
+ // byte format (like 0xXYXYXYXY....).
+ //
+ if (MicrocodeEntryPoint->DataSize == 0) {
+ TotalSize = 2048;
+ } else {
+ TotalSize = MicrocodeEntryPoint->TotalSize;
+ }
+ MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *)(((UINTN)MicrocodeEntryPoint) + TotalSize);
+ }
+
+ do {
+ if (MicrocodeEntryPoint->HeaderVersion == 0x1 && MicrocodeEntryPoint->LoaderRevision == 0x1) {
+ return MicrocodeEntryPoint;
+ } 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;
+ }
+ } while (((UINTN)MicrocodeEntryPoint < MicrocodeEnd));
+
+ return NULL;
+}
+
+/**
Get current Microcode used region size.
+ @param[in] MicrocodePatchAddress The address of Microcode
+ @param[in] MicrocodePatchRegionSize The region size of Microcode
+
@return current Microcode used region size.
**/
UINTN
GetCurrentMicrocodeUsedRegionSize (
- VOID
+ IN VOID *MicrocodePatchAddress,
+ IN UINTN MicrocodePatchRegionSize
)
{
- BOOLEAN Result;
- UINT64 MicrocodePatchAddress;
- UINT64 MicrocodePatchRegionSize;
CPU_MICROCODE_HEADER *MicrocodeEntryPoint;
UINTN MicrocodeEnd;
UINTN TotalSize;
UINTN Count;
UINTN MicrocodeUsedEnd;
- Result = GetMicrocodeRegion(&MicrocodePatchAddress, &MicrocodePatchRegionSize);
- if (!Result) {
- DEBUG((DEBUG_ERROR, "Fail to get Microcode Region\n"));
- return 0;
- }
- DEBUG((DEBUG_INFO, "Microcode Region - 0x%lx - 0x%lx\n", MicrocodePatchAddress, MicrocodePatchRegionSize));
-
MicrocodeUsedEnd = (UINTN)MicrocodePatchAddress;
Count = 0;
- MicrocodeEnd = (UINTN)(MicrocodePatchAddress + MicrocodePatchRegionSize);
+ MicrocodeEnd = (UINTN)MicrocodePatchAddress + MicrocodePatchRegionSize;
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *)(UINTN)MicrocodePatchAddress;
do {
if (MicrocodeEntryPoint->HeaderVersion == 0x1 && MicrocodeEntryPoint->LoaderRevision == 0x1) {
@@ -635,12 +669,12 @@ GetCurrentMicrocodeUsedRegionSize (
Count++;
ASSERT(Count < 0xFF);
- MicrocodeUsedEnd = (UINTN)MicrocodeEntryPoint;
//
// Get the next patch.
//
MicrocodeEntryPoint = (CPU_MICROCODE_HEADER *)(((UINTN)MicrocodeEntryPoint) + TotalSize);
+ MicrocodeUsedEnd = (UINTN)MicrocodeEntryPoint;
} while (((UINTN)MicrocodeEntryPoint < MicrocodeEnd));
return MicrocodeUsedEnd - (UINTN)MicrocodePatchAddress;
@@ -685,62 +719,283 @@ UpdateMicrocode (
}
/**
- Write Microcode.
+ Update Microcode flash region.
- Caution: This function may receive untrusted input.
+ @param[in] MicrocodeFmpPrivate The Microcode driver private data
+ @param[in] CurrentMicrocodeEntryPoint Current Microcode entrypoint
+ @param[in] Image The Microcode image buffer.
+ @param[in] ImageSize The size of Microcode image buffer in bytes.
+ @param[out] LastAttemptStatus The last attempt status, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
- @param[in] ImageIndex The index of Microcode image.
- @param[in] Image The Microcode image buffer.
- @param[in] ImageSize The size of Microcode image buffer in bytes.
- @param[out] LastAttemptVersion The last attempt version, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
- @param[out] LastAttemptStatus The last attempt status, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
- @param[out] AbortReason A pointer to a pointer to a null-terminated string providing more
- details for the aborted operation. The buffer is allocated by this function
- with AllocatePool(), and it is the caller's responsibility to free it with a
- call to FreePool().
-
- @retval EFI_SUCCESS The Microcode image is written.
- @retval EFI_VOLUME_CORRUPTED The Microcode image is corrupt.
- @retval EFI_INCOMPATIBLE_VERSION The Microcode image version is incorrect.
- @retval EFI_SECURITY_VIOLATION The Microcode image fails to load.
- @retval EFI_WRITE_PROTECTED The flash device is read only.
+ @retval EFI_SUCCESS The Microcode image is written.
+ @retval EFI_WRITE_PROTECTED The flash device is read only.
**/
EFI_STATUS
-MicrocodeWrite (
- IN UINTN ImageIndex,
- IN VOID *Image,
- IN UINTN ImageSize,
- OUT UINT32 *LastAttemptVersion,
- OUT UINT32 *LastAttemptStatus,
- OUT CHAR16 **AbortReason
+UpdateMicrocodeFlashRegion (
+ IN MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate,
+ IN CPU_MICROCODE_HEADER *CurrentMicrocodeEntryPoint,
+ IN VOID *Image,
+ IN UINTN ImageSize,
+ OUT UINT32 *LastAttemptStatus
)
{
- BOOLEAN Result;
- EFI_STATUS Status;
- UINT64 MicrocodePatchAddress;
- UINT64 MicrocodePatchRegionSize;
- CPU_MICROCODE_HEADER *CurrentMicrocodeEntryPoint;
+ VOID *MicrocodePatchAddress;
+ UINTN MicrocodePatchRegionSize;
UINTN CurrentTotalSize;
UINTN UsedRegionSize;
- VOID *AlignedImage;
+ EFI_STATUS Status;
+ VOID *MicrocodePatchScratchBuffer;
+ UINT8 *ScratchBufferPtr;
+ UINTN ScratchBufferSize;
+ UINTN RestSize;
+ UINTN AvailableSize;
+ VOID *NextMicrocodeEntryPoint;
+ MICROCODE_INFO *MicrocodeInfo;
+ UINTN MicrocodeCount;
+ UINTN Index;
- Result = GetMicrocodeRegion(&MicrocodePatchAddress, &MicrocodePatchRegionSize);
- if (!Result) {
- DEBUG((DEBUG_ERROR, "Fail to get Microcode Region\n"));
- return EFI_NOT_FOUND;
+ DEBUG((DEBUG_INFO, "UpdateMicrocodeFlashRegion: Image - 0x%x, size - 0x%x\n", Image, ImageSize));
+
+ MicrocodePatchAddress = MicrocodeFmpPrivate->MicrocodePatchAddress;
+ MicrocodePatchRegionSize = MicrocodeFmpPrivate->MicrocodePatchRegionSize;
+
+ MicrocodePatchScratchBuffer = AllocateZeroPool (MicrocodePatchRegionSize);
+ if (MicrocodePatchScratchBuffer == NULL) {
+ DEBUG((DEBUG_ERROR, "Fail to allocate Microcode Scratch buffer\n"));
+ *LastAttemptStatus = LAST_ATTEMPT_STATUS_ERROR_INSUFFICIENT_RESOURCES;
+ return EFI_OUT_OF_RESOURCES;
}
+ ScratchBufferPtr = MicrocodePatchScratchBuffer;
+ ScratchBufferSize = 0;
+ //
+ // Current data collection
+ //
CurrentTotalSize = 0;
- CurrentMicrocodeEntryPoint = GetCurrentMicrocodeInUse();
+ AvailableSize = 0;
+ NextMicrocodeEntryPoint = NULL;
if (CurrentMicrocodeEntryPoint != NULL) {
if (CurrentMicrocodeEntryPoint->DataSize == 0) {
CurrentTotalSize = 2048;
} else {
CurrentTotalSize = CurrentMicrocodeEntryPoint->TotalSize;
}
+ DEBUG((DEBUG_INFO, " CurrentTotalSize - 0x%x\n", CurrentTotalSize));
+ NextMicrocodeEntryPoint = GetNextMicrocode(MicrocodePatchAddress, MicrocodePatchRegionSize, CurrentMicrocodeEntryPoint);
+ DEBUG((DEBUG_INFO, " NextMicrocodeEntryPoint - 0x%x\n", NextMicrocodeEntryPoint));
+ if (NextMicrocodeEntryPoint != NULL) {
+ ASSERT ((UINTN)NextMicrocodeEntryPoint >= ((UINTN)CurrentMicrocodeEntryPoint + CurrentTotalSize));
+ AvailableSize = (UINTN)NextMicrocodeEntryPoint - (UINTN)CurrentMicrocodeEntryPoint;
+ } else {
+ AvailableSize = (UINTN)MicrocodePatchAddress + MicrocodePatchRegionSize - (UINTN)CurrentMicrocodeEntryPoint;
+ }
+ DEBUG((DEBUG_INFO, " AvailableSize - 0x%x\n", AvailableSize));
+ }
+ ASSERT (AvailableSize >= CurrentTotalSize);
+ UsedRegionSize = GetCurrentMicrocodeUsedRegionSize(MicrocodePatchAddress, MicrocodePatchRegionSize);
+ DEBUG((DEBUG_INFO, " UsedRegionSize - 0x%x\n", UsedRegionSize));
+ ASSERT (UsedRegionSize >= CurrentTotalSize);
+ if (CurrentMicrocodeEntryPoint != NULL) {
+ ASSERT ((UINTN)MicrocodePatchAddress + UsedRegionSize >= ((UINTN)CurrentMicrocodeEntryPoint + CurrentTotalSize));
+ }
+ //
+ // Total Size means the Microcode data size.
+ // Available Size means the Microcode data size plus the pad till next (1) Microcode or (2) the end.
+ //
+ // (1)
+ // +------+-----------+-----+------+===================+
+ // | MCU1 | Microcode | PAD | MCU2 | Empty |
+ // +------+-----------+-----+------+===================+
+ // | TotalSize |
+ // |<-AvailableSize->|
+ // |<- UsedRegionSize ->|
+ //
+ // (2)
+ // +------+-----------+===================+
+ // | MCU | Microcode | Empty |
+ // +------+-----------+===================+
+ // | TotalSize |
+ // |<- AvailableSize ->|
+ // |<-UsedRegionSize->|
+ //
+
+ //
+ // Update based on policy
+ //
+
+ //
+ // 1. If there is enough space to update old one in situ, replace old microcode in situ.
+ //
+ if (AvailableSize >= ImageSize) {
+ DEBUG((DEBUG_INFO, "Replace old microcode in situ\n"));
+ //
+ // +------+------------+------+===================+
+ // |Other1| Old Image |Other2| Empty |
+ // +------+------------+------+===================+
+ //
+ // +------+---------+--+------+===================+
+ // |Other1|New Image|FF|Other2| Empty |
+ // +------+---------+--+------+===================+
+ //
+ // 1.1. Copy new image
+ CopyMem (ScratchBufferPtr, Image, ImageSize);
+ ScratchBufferSize += ImageSize;
+ ScratchBufferPtr = (UINT8 *)ScratchBufferPtr + ScratchBufferSize;
+ // 1.2. Pad 0xFF
+ RestSize = AvailableSize - ImageSize;
+ if (RestSize > 0) {
+ SetMem (ScratchBufferPtr, RestSize, 0xFF);
+ ScratchBufferSize += RestSize;
+ ScratchBufferPtr = (UINT8 *)ScratchBufferPtr + ScratchBufferSize;
+ }
+ Status = UpdateMicrocode((UINTN)CurrentMicrocodeEntryPoint, MicrocodePatchScratchBuffer, ScratchBufferSize, LastAttemptStatus);
+ return Status;
+ }
+
+ //
+ // 2. If there is enough space to remove old one and add new one, reorg and replace old microcode.
+ //
+ if (MicrocodePatchRegionSize - (UsedRegionSize - CurrentTotalSize) >= ImageSize) {
+ if (CurrentMicrocodeEntryPoint == NULL) {
+ DEBUG((DEBUG_INFO, "Append new microcode\n"));
+ //
+ // +------+------------+------+===================+
+ // |Other1| Other |Other2| Empty |
+ // +------+------------+------+===================+
+ //
+ // +------+------------+------+-----------+=======+
+ // |Other1| Other |Other2| New Image | Empty |
+ // +------+------------+------+-----------+=======+
+ //
+ Status = UpdateMicrocode((UINTN)MicrocodePatchAddress + UsedRegionSize, Image, ImageSize, LastAttemptStatus);
+ } else {
+ DEBUG((DEBUG_INFO, "Reorg and replace old microcode\n"));
+ //
+ // +------+------------+------+===================+
+ // |Other1| Old Image |Other2| Empty |
+ // +------+------------+------+===================+
+ //
+ // +------+---------------+------+================+
+ // |Other1| New Image |Other2| Empty |
+ // +------+---------------+------+================+
+ //
+ // 2.1. Copy new image
+ CopyMem (MicrocodePatchScratchBuffer, Image, ImageSize);
+ ScratchBufferSize += ImageSize;
+ ScratchBufferPtr = (UINT8 *)ScratchBufferPtr + ScratchBufferSize;
+ // 2.2. Copy rest images after the old image.
+ if (NextMicrocodeEntryPoint != 0) {
+ RestSize = (UINTN)MicrocodePatchAddress + UsedRegionSize - ((UINTN)NextMicrocodeEntryPoint);
+ CopyMem (ScratchBufferPtr, (UINT8 *)CurrentMicrocodeEntryPoint + CurrentTotalSize, RestSize);
+ ScratchBufferSize += RestSize;
+ ScratchBufferPtr = (UINT8 *)ScratchBufferPtr + ScratchBufferSize;
+ }
+ Status = UpdateMicrocode((UINTN)CurrentMicrocodeEntryPoint, MicrocodePatchScratchBuffer, ScratchBufferSize, LastAttemptStatus);
+ }
+ return Status;
+ }
+
+ //
+ // 3. The new image can be put in MCU region, but not all others can be put.
+ // So all the unused MCU is removed.
+ //
+ if (MicrocodePatchRegionSize >= ImageSize) {
+ //
+ // +------+------------+------+===================+
+ // |Other1| Old Image |Other2| Empty |
+ // +------+------------+------+===================+
+ //
+ // +-------------------------------------+--------+
+ // | New Image | Other |
+ // +-------------------------------------+--------+
+ //
+ DEBUG((DEBUG_INFO, "Add new microcode from beginning\n"));
+
+ MicrocodeCount = MicrocodeFmpPrivate->DescriptorCount;
+ MicrocodeInfo = MicrocodeFmpPrivate->MicrocodeInfo;
+
+ // 3.1. Copy new image
+ CopyMem (MicrocodePatchScratchBuffer, Image, ImageSize);
+ ScratchBufferSize += ImageSize;
+ ScratchBufferPtr = (UINT8 *)ScratchBufferPtr + ScratchBufferSize;
+ // 3.2. Copy some others to rest buffer
+ for (Index = 0; Index < MicrocodeCount; Index++) {
+ if (!MicrocodeInfo[Index].InUse) {
+ continue;
+ }
+ if (MicrocodeInfo[Index].MicrocodeEntryPoint == CurrentMicrocodeEntryPoint) {
+ continue;
+ }
+ if (MicrocodeInfo[Index].TotalSize <= MicrocodePatchRegionSize - ScratchBufferSize) {
+ CopyMem (ScratchBufferPtr, MicrocodeInfo[Index].MicrocodeEntryPoint, MicrocodeInfo[Index].TotalSize);
+ ScratchBufferSize += MicrocodeInfo[Index].TotalSize;
+ ScratchBufferPtr = (UINT8 *)ScratchBufferPtr + ScratchBufferSize;
+ }
+ }
+ // 3.3. Pad 0xFF
+ RestSize = MicrocodePatchRegionSize - ScratchBufferSize;
+ if (RestSize > 0) {
+ SetMem (ScratchBufferPtr, RestSize, 0xFF);
+ ScratchBufferSize += RestSize;
+ ScratchBufferPtr = (UINT8 *)ScratchBufferPtr + ScratchBufferSize;
+ }
+ Status = UpdateMicrocode((UINTN)MicrocodePatchAddress, MicrocodePatchScratchBuffer, ScratchBufferSize, LastAttemptStatus);
+ return Status;
}
//
+ // 4. The new image size is bigger than the whole MCU region.
+ //
+ DEBUG((DEBUG_ERROR, "Microcode too big\n"));
+ *LastAttemptStatus = LAST_ATTEMPT_STATUS_ERROR_INSUFFICIENT_RESOURCES;
+ Status = EFI_OUT_OF_RESOURCES;
+
+ return Status;
+}
+
+/**
+ Write Microcode.
+
+ Caution: This function may receive untrusted input.
+
+ @param[in] MicrocodeFmpPrivate The Microcode driver private data
+ @param[in] Image The Microcode image buffer.
+ @param[in] ImageSize The size of Microcode image buffer in bytes.
+ @param[out] LastAttemptVersion The last attempt version, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
+ @param[out] LastAttemptStatus The last attempt status, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
+ @param[out] AbortReason A pointer to a pointer to a null-terminated string providing more
+ details for the aborted operation. The buffer is allocated by this function
+ with AllocatePool(), and it is the caller's responsibility to free it with a
+ call to FreePool().
+
+ @retval EFI_SUCCESS The Microcode image is written.
+ @retval EFI_VOLUME_CORRUPTED The Microcode image is corrupt.
+ @retval EFI_INCOMPATIBLE_VERSION The Microcode image version is incorrect.
+ @retval EFI_SECURITY_VIOLATION The Microcode image fails to load.
+ @retval EFI_WRITE_PROTECTED The flash device is read only.
+**/
+EFI_STATUS
+MicrocodeWrite (
+ IN MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate,
+ IN VOID *Image,
+ IN UINTN ImageSize,
+ OUT UINT32 *LastAttemptVersion,
+ OUT UINT32 *LastAttemptStatus,
+ OUT CHAR16 **AbortReason
+ )
+{
+ EFI_STATUS Status;
+ VOID *AlignedImage;
+ CPU_MICROCODE_HEADER *CurrentMicrocodeEntryPoint;
+
+ //
+ // We must get Current MicrocodeEntrypoint *before* VerifyMicrocode,
+ // because the MicrocodeSignature might be updated in VerifyMicrocode.
+ //
+ CurrentMicrocodeEntryPoint = GetCurrentMicrocodeInUse(MicrocodeFmpPrivate->MicrocodePatchAddress, MicrocodeFmpPrivate->MicrocodePatchRegionSize);
+ DEBUG((DEBUG_INFO, " CurrentMicrocodeEntryPoint - 0x%x\n", CurrentMicrocodeEntryPoint));
+
+ //
// MCU must be 16 bytes aligned
//
AlignedImage = AllocateCopyPool(ImageSize, Image);
@@ -759,32 +1014,13 @@ MicrocodeWrite (
}
DEBUG((DEBUG_INFO, "Pass VerifyMicrocode\n"));
- if (CurrentTotalSize < ImageSize) {
- UsedRegionSize = GetCurrentMicrocodeUsedRegionSize();
- if (MicrocodePatchRegionSize - UsedRegionSize >= ImageSize) {
- //
- // Append
- //
- DEBUG((DEBUG_INFO, "Append new microcode\n"));
- Status = UpdateMicrocode(MicrocodePatchAddress + UsedRegionSize, AlignedImage, ImageSize, LastAttemptStatus);
- } else if (MicrocodePatchRegionSize >= ImageSize) {
- //
- // Ignor all others and just add this one from beginning.
- //
- DEBUG((DEBUG_INFO, "Add new microcode from beginning\n"));
- Status = UpdateMicrocode(MicrocodePatchAddress, AlignedImage, ImageSize, LastAttemptStatus);
- } else {
- DEBUG((DEBUG_ERROR, "Microcode too big\n"));
- *LastAttemptStatus = LAST_ATTEMPT_STATUS_ERROR_INSUFFICIENT_RESOURCES;
- Status = EFI_OUT_OF_RESOURCES;
- }
- } else {
- //
- // Replace
- //
- DEBUG((DEBUG_INFO, "Replace old microcode\n"));
- Status = UpdateMicrocode((UINTN)CurrentMicrocodeEntryPoint, AlignedImage, ImageSize, LastAttemptStatus);
- }
+ Status = UpdateMicrocodeFlashRegion(
+ MicrocodeFmpPrivate,
+ CurrentMicrocodeEntryPoint,
+ AlignedImage,
+ ImageSize,
+ LastAttemptStatus
+ );
FreePool(AlignedImage);
diff --git a/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.h b/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.h
index 77e8441..1bbf2bd 100644
--- a/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.h
+++ b/UefiCpuPkg/Feature/Capsule/MicrocodeUpdateDxe/MicrocodeUpdate.h
@@ -50,12 +50,21 @@ typedef struct {
UINT32 LastAttemptStatus;
} MICROCODE_FMP_LAST_ATTEMPT_VARIABLE;
+typedef struct {
+ CPU_MICROCODE_HEADER *MicrocodeEntryPoint;
+ UINTN TotalSize;
+ BOOLEAN InUse;
+} MICROCODE_INFO;
+
struct _MICROCODE_FMP_PRIVATE_DATA {
UINT32 Signature;
EFI_FIRMWARE_MANAGEMENT_PROTOCOL Fmp;
EFI_HANDLE Handle;
+ VOID *MicrocodePatchAddress;
+ UINTN MicrocodePatchRegionSize;
UINT8 DescriptorCount;
EFI_FIRMWARE_IMAGE_DESCRIPTOR *ImageDescriptor;
+ MICROCODE_INFO *MicrocodeInfo;
UINT32 PackageVersion;
CHAR16 *PackageVersionName;
MICROCODE_FMP_LAST_ATTEMPT_VARIABLE LastAttempt;
@@ -84,63 +93,63 @@ typedef struct _MICROCODE_FMP_PRIVATE_DATA MICROCODE_FMP_PRIVATE_DATA;
)
/**
- Get current Microcode information.
+ Get Microcode Region.
- @param[out] ImageDescriptor Microcode ImageDescriptor
- @param[in] DescriptorCount The count of Microcode ImageDescriptor allocated.
+ @param[out] MicrocodePatchAddress The address of Microcode
+ @param[out] MicrocodePatchRegionSize The region size of Microcode
- @return Microcode count
+ @retval TRUE The Microcode region is returned.
+ @retval FALSE No Microcode region.
**/
-UINTN
-GetMicrocodeInfo (
- OUT EFI_FIRMWARE_IMAGE_DESCRIPTOR *ImageDescriptor, OPTIONAL
- IN UINTN DescriptorCount OPTIONAL
+BOOLEAN
+GetMicrocodeRegion (
+ OUT VOID **MicrocodePatchAddress,
+ OUT UINTN *MicrocodePatchRegionSize
);
/**
- Read Microcode.
+ Get current Microcode information.
- @param[in] ImageIndex The index of Microcode image.
- @param[in, out] Image The Microcode image buffer.
- @param[in, out] ImageSize The size of Microcode image buffer in bytes.
+ @param[in] DescriptorCount The count of Microcode ImageDescriptor allocated.
+ @param[out] ImageDescriptor Microcode ImageDescriptor
+ @param[out] MicrocodeInfo Microcode information
- @retval EFI_SUCCESS The Microcode image is read.
- @retval EFI_NOT_FOUND The Microcode image is not found.
+ @return Microcode count
**/
-EFI_STATUS
-MicrocodeRead (
- IN UINTN ImageIndex,
- IN OUT VOID *Image,
- IN OUT UINTN *ImageSize
+UINTN
+GetMicrocodeInfo (
+ IN UINTN DescriptorCount, OPTIONAL
+ OUT EFI_FIRMWARE_IMAGE_DESCRIPTOR *ImageDescriptor, OPTIONAL
+ OUT MICROCODE_INFO *MicrocodeInfo OPTIONAL
);
/**
Write Microcode.
- @param[in] ImageIndex The index of Microcode image.
- @param[in] Image The Microcode image buffer.
- @param[in] ImageSize The size of Microcode image buffer in bytes.
- @param[out] LastAttemptVersion The last attempt version, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
- @param[out] LastAttemptStatus The last attempt status, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
- @param[out] AbortReason A pointer to a pointer to a null-terminated string providing more
- details for the aborted operation. The buffer is allocated by this function
- with AllocatePool(), and it is the caller's responsibility to free it with a
- call to FreePool().
+ @param[in] MicrocodeFmpPrivate The Microcode driver private data
+ @param[in] Image The Microcode image buffer.
+ @param[in] ImageSize The size of Microcode image buffer in bytes.
+ @param[out] LastAttemptVersion The last attempt version, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
+ @param[out] LastAttemptStatus The last attempt status, which will be recorded in ESRT and FMP EFI_FIRMWARE_IMAGE_DESCRIPTOR.
+ @param[out] AbortReason A pointer to a pointer to a null-terminated string providing more
+ details for the aborted operation. The buffer is allocated by this function
+ with AllocatePool(), and it is the caller's responsibility to free it with a
+ call to FreePool().
@retval EFI_SUCCESS The Microcode image is written.
@retval EFI_VOLUME_CORRUPTED The Microcode image is corrupt.
@retval EFI_INCOMPATIBLE_VERSION The Microcode image version is incorrect.
@retval EFI_SECURITY_VIOLATION The Microcode image fails to load.
- @retval EFI_WRITE_PROTECTED The flash device is read only.
+ @retval EFI_WRITE_PROTECTED The flash device is read only.
**/
EFI_STATUS
MicrocodeWrite (
- IN UINTN ImageIndex,
- IN VOID *Image,
- IN UINTN ImageSize,
- OUT UINT32 *LastAttemptVersion,
- OUT UINT32 *LastAttemptStatus,
- OUT CHAR16 **AbortReason
+ IN MICROCODE_FMP_PRIVATE_DATA *MicrocodeFmpPrivate,
+ IN VOID *Image,
+ IN UINTN ImageSize,
+ OUT UINT32 *LastAttemptVersion,
+ OUT UINT32 *LastAttemptStatus,
+ OUT CHAR16 **AbortReason
);
/**
--
2.7.4.windows.1
reply other threads:[~2016-12-26 15:40 UTC|newest]
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