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Improve descriptor version handling

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This commit is contained in:
vit9696 2018-05-06 23:14:30 +03:00
parent acb1a4d099
commit 3993bd7090
2 changed files with 44 additions and 51 deletions
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17
descriptor.h
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@ -33,18 +33,15 @@ typedef struct _FLASH_DESCRIPTOR_HEADER {
// Descriptor version was reserved in older firmware
#define FLASH_DESCRIPTOR_VERSION_INVALID 0xFFFFFFFF
// The only known version found in Coffee Lake
#define FLASH_DESCRIPTOR_VERSION_MAJOR 1
#define FLASH_DESCRIPTOR_VERSION_MINOR 0
// Descriptor version present in Coffee Lake and newer
typedef struct _FLASH_DESCRIPTOR_VERSION_V3 {
typedef struct _FLASH_DESCRIPTOR_VERSION {
UINT32 Reserved : 14;
UINT32 VersionMinor : 7;
UINT32 VersionMajor : 11;
} FLASH_DESCRIPTOR_VERSION_V3;
// Descripror version
typedef union _FLASH_DESCRIPTOR_VERSION {
UINT32 RawValue;
FLASH_DESCRIPTOR_VERSION_V3 V3;
UINT32 Minor : 7;
UINT32 Major : 11;
} FLASH_DESCRIPTOR_VERSION;
// Descriptor map
@ -68,7 +65,7 @@ typedef struct _FLASH_DESCRIPTOR_MAP {
UINT32 NumberOfProcStraps : 8; // One-based number of UINT32s to read as processor straps, min=0, max=255 (1 Kb)
UINT32: 16;
// FLMAP 3
FLASH_DESCRIPTOR_VERSION Version; // Reserved prior to v3
UINT32 DescriptorVersion; // Reserved prior to Coffee Lake
} FLASH_DESCRIPTOR_MAP;
#define FLASH_DESCRIPTOR_MAX_BASE 0xE0

78
ffsengine.cpp
View File

@ -286,14 +286,10 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
const FLASH_DESCRIPTOR_REGION_SECTION* regionSection = (const FLASH_DESCRIPTOR_REGION_SECTION*)calculateAddress8(descriptor, descriptorMap->RegionBase);
const FLASH_DESCRIPTOR_COMPONENT_SECTION* componentSection = (const FLASH_DESCRIPTOR_COMPONENT_SECTION*)calculateAddress8(descriptor, descriptorMap->ComponentBase);
UINT8 descriptorVersion = 0;
if (descriptorMap->Version.RawValue != FLASH_DESCRIPTOR_VERSION_INVALID) // Kaby Lake+ descriptor
descriptorVersion = 3;
// Check descriptor version by getting hardcoded value of FlashParameters.ReadClockFrequency
else if (componentSection->FlashParameters.ReadClockFrequency == FLASH_FREQUENCY_20MHZ) // Old descriptor
// Check for legacy descriptor version by getting hardcoded value of FlashParameters.ReadClockFrequency
UINT8 descriptorVersion = 2; // Skylake+ descriptor
if (componentSection->FlashParameters.ReadClockFrequency == FLASH_FREQUENCY_20MHZ) // Legacy descriptor
descriptorVersion = 1;
else // Skylake+ descriptor
descriptorVersion = 2;
// ME region
QByteArray me;
@ -360,7 +356,7 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
QByteArray ec;
UINT32 ecBegin = 0;
UINT32 ecEnd = 0;
if (descriptorVersion >= 2) {
if (descriptorVersion == 2) {
if (regionSection->EcLimit) {
ecBegin = calculateRegionOffset(regionSection->EcBase);
ecEnd = calculateRegionSize(regionSection->EcBase, regionSection->EcLimit);
@ -387,7 +383,7 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
msg(tr("parseIntelImage: descriptor parsing failed, descriptor region has intersection with PDR region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorVersion >= 2 && hasIntersection(descriptorBegin, descriptorEnd, ecBegin, ecEnd)) {
if (descriptorVersion == 2 && hasIntersection(descriptorBegin, descriptorEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, descriptor region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
@ -404,7 +400,7 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
msg(tr("parseIntelImage: descriptor parsing failed, GbE region has intersection with PDR region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorVersion >= 2 && hasIntersection(gbeBegin, gbeEnd, ecBegin, ecEnd)) {
if (descriptorVersion == 2 && hasIntersection(gbeBegin, gbeEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, GbE region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
@ -417,7 +413,7 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
msg(tr("parseIntelImage: descriptor parsing failed, ME region has intersection with PDR region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorVersion >= 2 && hasIntersection(meBegin, meEnd, ecBegin, ecEnd)) {
if (descriptorVersion == 2 && hasIntersection(meBegin, meEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, ME region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
@ -426,12 +422,12 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
msg(tr("parseIntelImage: descriptor parsing failed, BIOS region has intersection with PDR region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
if (descriptorVersion >= 2 && hasIntersection(biosBegin, biosEnd, ecBegin, ecEnd)) {
if (descriptorVersion == 2 && hasIntersection(biosBegin, biosEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, BIOS region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// PDR
if (descriptorVersion >= 2 && hasIntersection(pdrBegin, pdrEnd, ecBegin, ecEnd)) {
if (descriptorVersion == 2 && hasIntersection(pdrBegin, pdrEnd, ecBegin, ecEnd)) {
msg(tr("parseIntelImage: descriptor parsing failed, PDR region has intersection with EC region"));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
@ -474,7 +470,7 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
offsets.append(pdrBegin);
info += tr("\nPDR region offset: %1h").hexarg(pdrBegin);
}
if (descriptorVersion >= 2 && regionSection->EcLimit) {
if (descriptorVersion == 2 && regionSection->EcLimit) {
offsets.append(ecBegin);
info += tr("\nEC region offset: %1h").hexarg(ecBegin);
}
@ -508,7 +504,7 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_PDR ? "Yes " : "No ");
}
else if (descriptorVersion >= 2) {
else if (descriptorVersion == 2) {
const FLASH_DESCRIPTOR_MASTER_SECTION_V2* masterSection = (const FLASH_DESCRIPTOR_MASTER_SECTION_V2*)calculateAddress8(descriptor, descriptorMap->MasterBase);
info += tr("\nRegion access settings:");
info += tr("\nBIOS: %1h %2h ME: %3h %4h\nGbE: %5h %6h EC: %7h %8h")
@ -540,6 +536,17 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
info += tr("\nEC %1 %2")
.arg(masterSection->BiosRead & FLASH_DESCRIPTOR_REGION_ACCESS_EC ? "Yes " : "No ")
.arg(masterSection->BiosWrite & FLASH_DESCRIPTOR_REGION_ACCESS_EC ? "Yes " : "No ");
// Prepend descriptor version if present
if (descriptorMap->DescriptorVersion != FLASH_DESCRIPTOR_VERSION_INVALID) {
const FLASH_DESCRIPTOR_VERSION* version = (const FLASH_DESCRIPTOR_VERSION*)&descriptorMap->DescriptorVersion;
QString versionStr = tr("Flash descriptor version: %1.%2").arg(version->Major).arg(version->Minor);
if (version->Major != FLASH_DESCRIPTOR_VERSION_MAJOR || version->Minor != FLASH_DESCRIPTOR_VERSION_MINOR) {
versionStr += tr(", unknown");
msg(tr("parseIntelImage: unknown flash descriptor version %1.%2").arg(version->Major).arg(version->Minor));
}
info = versionStr + "\n" + info;
}
}
// VSCC table
@ -584,7 +591,7 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
result = parsePdrRegion(pdr, pdrIndex, index);
}
// Parse EC region
else if (descriptorVersion >= 2 && offsets.at(i) == ecBegin) {
else if (descriptorVersion == 2 && offsets.at(i) == ecBegin) {
QModelIndex ecIndex;
result = parseEcRegion(ec, ecIndex, index);
}
@ -603,7 +610,7 @@ UINT8 FfsEngine::parseIntelImage(const QByteArray & intelImage, QModelIndex & in
IntelDataEnd = biosEnd;
else if (LastRegionOffset == pdrBegin)
IntelDataEnd = pdrEnd;
else if (descriptorVersion >= 2 && LastRegionOffset == ecBegin)
else if (descriptorVersion == 2 && LastRegionOffset == ecBegin)
IntelDataEnd = ecEnd;
if (IntelDataEnd > (UINT32)intelImage.size()) { // Image file is truncated
@ -3037,32 +3044,21 @@ UINT8 FfsEngine::reconstructIntelImage(const QModelIndex& index, QByteArray& rec
UINT32 ecBegin = 0;
UINT32 ecEnd = 0;
UINT8 descriptorVersion = 0;
if (descriptorMap->Version.RawValue != FLASH_DESCRIPTOR_VERSION_INVALID) {
// Normally this is 1.0, check only the major value to avoid unnecessary future incompatibilities.
if (descriptorMap->Version.V3.VersionMajor != 1) {
msg(tr("reconstructIntelImage: unknown descriptor version: %1.%2").arg(descriptorMap->Version.V3.VersionMajor)
.arg(descriptorMap->Version.V3.VersionMinor));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
descriptorVersion = 3;
}
else {
// Check legacy descriptor version by getting hardcoded value of FlashParameters.ReadClockFrequency
const FLASH_DESCRIPTOR_COMPONENT_SECTION* componentSection = (const FLASH_DESCRIPTOR_COMPONENT_SECTION*)calculateAddress8((const UINT8*)descriptor.constData(), descriptorMap->ComponentBase);
if (componentSection->FlashParameters.ReadClockFrequency == FLASH_FREQUENCY_20MHZ) { // Old descriptor
descriptorVersion = 1;
}
else if (componentSection->FlashParameters.ReadClockFrequency == FLASH_FREQUENCY_17MHZ) { // Skylake+ descriptor
descriptorVersion = 2;
}
else {
msg(tr("reconstructIntelImage: unknown descriptor version with ReadClockFrequency %1h").hexarg(componentSection->FlashParameters.ReadClockFrequency));
return ERR_INVALID_FLASH_DESCRIPTOR;
}
// Check for legacy descriptor version by getting hardcoded value of FlashParameters.ReadClockFrequency
UINT8 descriptorVersion = 2; // Skylake+ descriptor
const FLASH_DESCRIPTOR_COMPONENT_SECTION* componentSection = (const FLASH_DESCRIPTOR_COMPONENT_SECTION*)calculateAddress8((const UINT8*)descriptor.constData(), descriptorMap->ComponentBase);
if (componentSection->FlashParameters.ReadClockFrequency == FLASH_FREQUENCY_20MHZ) // Legacy descriptor
descriptorVersion = 1;
if (descriptorVersion == 2 && descriptorMap->DescriptorVersion != FLASH_DESCRIPTOR_VERSION_INVALID) {
// Warn about incompatible version descriptor in case it is different.
const FLASH_DESCRIPTOR_VERSION *version = (const FLASH_DESCRIPTOR_VERSION *)&descriptorMap->DescriptorVersion;
if (version->Major != FLASH_DESCRIPTOR_VERSION_MAJOR || version->Minor != FLASH_DESCRIPTOR_VERSION_MINOR)
msg(tr("reconstructIntelImage: discovered unexpected %1.%2 descriptor version, trying to continue...")
.arg(version->Major).arg(version->Minor));
}
if (descriptorVersion >= 2) {
if (descriptorVersion == 2) {
ecBegin = calculateRegionOffset(regionSection->EcBase);
ecEnd = ecBegin + calculateRegionSize(regionSection->EcBase, regionSection->EcLimit);
}