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authorEric Dong <eric.dong@intel.com>2018-11-09 13:20:41 +0800
committerEric Dong <eric.dong@intel.com>2018-11-11 10:02:43 +0800
commitc1528b855c42b05886f90ad8c76c363b32ee7539 (patch)
tree1911e3ae07defb72481bb3dd2de41f800300ff70 /UefiCpuPkg
parent8cd4e734ccdfbc961c72aeaa8dbd3f5154171f9b (diff)
downloadedk2-c1528b855c42b05886f90ad8c76c363b32ee7539.tar.gz
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UefiCpuPkg/RegisterCpuFeaturesLib: Adjust Order.
V2 changes: V1 change has regression which caused by change feature order. V2 changes logic to detect dependence not only for the neighborhood features. It need to check all features in the list. V1 Changes: In current code logic, only adjust feature position if current CPU feature position not follow the request order. Just like Feature A need to be executed before feature B, but current feature A registers after feature B. So code will adjust the position for feature A, move it to just before feature B. If the position already met the requirement, code will not adjust the position. This logic has issue when met all below cases: 1. feature A has core or package level dependence with feature B. 2. feature A is register before feature B. 3. Also exist other features exist between feature A and B. Root cause is driver ignores the dependence for this case, so threads may execute not follow the dependence order. Fix this issue by change code logic to adjust feature position for CPU features which has dependence relationship. Related BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1311 Cc: Laszlo Ersek <lersek@redhat.com> Cc: Ruiyu Ni <ruiyu.ni@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Eric Dong <eric.dong@intel.com> Reviewed-by: Ruiyu Ni <Ruiyu.ni@intel.com>
Diffstat (limited to 'UefiCpuPkg')
-rw-r--r--UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c75
-rw-r--r--UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h16
-rw-r--r--UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c122
3 files changed, 193 insertions, 20 deletions
diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c
index 8588800e4a..e61ace9bad 100644
--- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c
+++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c
@@ -528,6 +528,32 @@ DumpRegisterTableOnProcessor (
}
/**
+ Get the biggest dependence type.
+ PackageDepType > CoreDepType > ThreadDepType > NoneDepType.
+
+ @param[in] BeforeDep Before dependence type.
+ @param[in] AfterDep After dependence type.
+ @param[in] NoneNeibBeforeDep Before dependence type for not neighborhood features.
+ @param[in] NoneNeibAfterDep After dependence type for not neighborhood features.
+
+ @retval Return the biggest dependence type.
+**/
+CPU_FEATURE_DEPENDENCE_TYPE
+BiggestDep (
+ IN CPU_FEATURE_DEPENDENCE_TYPE BeforeDep,
+ IN CPU_FEATURE_DEPENDENCE_TYPE AfterDep,
+ IN CPU_FEATURE_DEPENDENCE_TYPE NoneNeibBeforeDep,
+ IN CPU_FEATURE_DEPENDENCE_TYPE NoneNeibAfterDep
+ )
+{
+ CPU_FEATURE_DEPENDENCE_TYPE Bigger;
+
+ Bigger = MAX (BeforeDep, AfterDep);
+ Bigger = MAX (Bigger, NoneNeibBeforeDep);
+ return MAX(Bigger, NoneNeibAfterDep);
+}
+
+/**
Analysis register CPU features on each processor and save CPU setting in CPU register table.
@param[in] NumberOfCpus Number of processor in system
@@ -551,6 +577,8 @@ AnalysisProcessorFeatures (
BOOLEAN Success;
CPU_FEATURE_DEPENDENCE_TYPE BeforeDep;
CPU_FEATURE_DEPENDENCE_TYPE AfterDep;
+ CPU_FEATURE_DEPENDENCE_TYPE NoneNeibBeforeDep;
+ CPU_FEATURE_DEPENDENCE_TYPE NoneNeibAfterDep;
CpuFeaturesData = GetCpuFeaturesData ();
CpuFeaturesData->CapabilityPcd = AllocatePool (CpuFeaturesData->BitMaskSize);
@@ -627,14 +655,9 @@ AnalysisProcessorFeatures (
//
CpuInfo = &CpuFeaturesData->InitOrder[ProcessorNumber].CpuInfo;
Entry = GetFirstNode (&CpuInitOrder->OrderList);
- NextEntry = Entry->ForwardLink;
while (!IsNull (&CpuInitOrder->OrderList, Entry)) {
CpuFeatureInOrder = CPU_FEATURE_ENTRY_FROM_LINK (Entry);
- if (!IsNull (&CpuInitOrder->OrderList, NextEntry)) {
- NextCpuFeatureInOrder = CPU_FEATURE_ENTRY_FROM_LINK (NextEntry);
- } else {
- NextCpuFeatureInOrder = NULL;
- }
+
Success = FALSE;
if (IsBitMaskMatch (CpuFeatureInOrder->FeatureMask, CpuFeaturesData->SettingPcd)) {
Status = CpuFeatureInOrder->InitializeFunc (ProcessorNumber, CpuInfo, CpuFeatureInOrder->ConfigData, TRUE);
@@ -667,31 +690,43 @@ AnalysisProcessorFeatures (
}
if (Success) {
- //
- // If feature has dependence with the next feature (ONLY care core/package dependency).
- // and feature initialize succeed, add sync semaphere here.
- //
- if (NextCpuFeatureInOrder != NULL) {
+ NextEntry = Entry->ForwardLink;
+ if (!IsNull (&CpuInitOrder->OrderList, NextEntry)) {
+ NextCpuFeatureInOrder = CPU_FEATURE_ENTRY_FROM_LINK (NextEntry);
+
+ //
+ // If feature has dependence with the next feature (ONLY care core/package dependency).
+ // and feature initialize succeed, add sync semaphere here.
+ //
BeforeDep = DetectFeatureScope (CpuFeatureInOrder, TRUE, NextCpuFeatureInOrder->FeatureMask);
AfterDep = DetectFeatureScope (NextCpuFeatureInOrder, FALSE, CpuFeatureInOrder->FeatureMask);
+ //
+ // Check whether next feature has After type dependence with not neighborhood CPU
+ // Features in former CPU features.
+ //
+ NoneNeibAfterDep = DetectNoneNeighborhoodFeatureScope(NextCpuFeatureInOrder, FALSE, &CpuInitOrder->OrderList);
} else {
- BeforeDep = DetectFeatureScope (CpuFeatureInOrder, TRUE, NULL);
- AfterDep = NoneDepType;
+ BeforeDep = NoneDepType;
+ AfterDep = NoneDepType;
+ NoneNeibAfterDep = NoneDepType;
}
//
- // Assume only one of the depend is valid.
+ // Check whether current feature has Before type dependence with none neighborhood
+ // CPU features in after Cpu features.
+ //
+ NoneNeibBeforeDep = DetectNoneNeighborhoodFeatureScope(CpuFeatureInOrder, TRUE, &CpuInitOrder->OrderList);
+
+ //
+ // Get the biggest dependence and add semaphore for it.
+ // PackageDepType > CoreDepType > ThreadDepType > NoneDepType.
//
- ASSERT (!(BeforeDep > ThreadDepType && AfterDep > ThreadDepType));
+ BeforeDep = BiggestDep(BeforeDep, AfterDep, NoneNeibBeforeDep, NoneNeibAfterDep);
if (BeforeDep > ThreadDepType) {
CPU_REGISTER_TABLE_WRITE32 (ProcessorNumber, Semaphore, 0, BeforeDep);
}
- if (AfterDep > ThreadDepType) {
- CPU_REGISTER_TABLE_WRITE32 (ProcessorNumber, Semaphore, 0, AfterDep);
- }
}
- Entry = Entry->ForwardLink;
- NextEntry = Entry->ForwardLink;
+ Entry = Entry->ForwardLink;
}
//
diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h
index b4c8ab777e..0a67a0581a 100644
--- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h
+++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeatures.h
@@ -207,6 +207,22 @@ DetectFeatureScope (
);
/**
+ Return feature dependence result.
+
+ @param[in] CpuFeature Pointer to CPU feature.
+ @param[in] Before Check before dependence or after.
+ @param[in] FeatureList Pointer to CPU feature list.
+
+ @retval return the dependence result.
+**/
+CPU_FEATURE_DEPENDENCE_TYPE
+DetectNoneNeighborhoodFeatureScope (
+ IN CPU_FEATURES_ENTRY *CpuFeature,
+ IN BOOLEAN Before,
+ IN LIST_ENTRY *FeatureList
+ );
+
+/**
Programs registers for the calling processor.
@param[in,out] Buffer The pointer to private data buffer.
diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c
index 394695baf2..ed8d526325 100644
--- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c
+++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/RegisterCpuFeaturesLib.c
@@ -113,6 +113,75 @@ IsBitMaskMatchCheck (
}
/**
+ Try to find the specify cpu featuren in former/after feature list.
+
+ @param[in] FeatureList Pointer to dependent CPU feature list
+ @param[in] CurrentEntry Pointer to current CPU feature entry.
+ @param[in] SearchFormer Find in former feature or after features.
+ @param[in] FeatureMask Pointer to CPU feature bit mask
+
+ @retval TRUE The feature bit mask is in dependent CPU feature bit mask buffer.
+ @retval FALSE The feature bit mask is not in dependent CPU feature bit mask buffer.
+**/
+BOOLEAN
+FindSpecifyFeature (
+ IN LIST_ENTRY *FeatureList,
+ IN LIST_ENTRY *CurrentEntry,
+ IN BOOLEAN SearchFormer,
+ IN UINT8 *FeatureMask
+ )
+{
+ CPU_FEATURES_ENTRY *CpuFeature;
+ LIST_ENTRY *NextEntry;
+
+ //
+ // Check whether exist the not neighborhood entry first.
+ // If not exist, return FALSE means not found status.
+ //
+ if (SearchFormer) {
+ NextEntry = CurrentEntry->BackLink;
+ if (IsNull (FeatureList, NextEntry)) {
+ return FALSE;
+ }
+
+ NextEntry = NextEntry->BackLink;
+ if (IsNull (FeatureList, NextEntry)) {
+ return FALSE;
+ }
+
+ NextEntry = CurrentEntry->BackLink->BackLink;
+ } else {
+ NextEntry = CurrentEntry->ForwardLink;
+ if (IsNull (FeatureList, NextEntry)) {
+ return FALSE;
+ }
+
+ NextEntry = NextEntry->ForwardLink;
+ if (IsNull (FeatureList, NextEntry)) {
+ return FALSE;
+ }
+
+ NextEntry = CurrentEntry->ForwardLink->ForwardLink;
+ }
+
+ while (!IsNull (FeatureList, NextEntry)) {
+ CpuFeature = CPU_FEATURE_ENTRY_FROM_LINK (NextEntry);
+
+ if (IsBitMaskMatchCheck (FeatureMask, CpuFeature->FeatureMask)) {
+ return TRUE;
+ }
+
+ if (SearchFormer) {
+ NextEntry = NextEntry->BackLink;
+ } else {
+ NextEntry = NextEntry->ForwardLink;
+ }
+ }
+
+ return FALSE;
+}
+
+/**
Return feature dependence result.
@param[in] CpuFeature Pointer to CPU feature.
@@ -179,6 +248,59 @@ DetectFeatureScope (
}
/**
+ Return feature dependence result.
+
+ @param[in] CpuFeature Pointer to CPU feature.
+ @param[in] Before Check before dependence or after.
+ @param[in] FeatureList Pointer to CPU feature list.
+
+ @retval return the dependence result.
+**/
+CPU_FEATURE_DEPENDENCE_TYPE
+DetectNoneNeighborhoodFeatureScope (
+ IN CPU_FEATURES_ENTRY *CpuFeature,
+ IN BOOLEAN Before,
+ IN LIST_ENTRY *FeatureList
+ )
+{
+ if (Before) {
+ if ((CpuFeature->PackageBeforeFeatureBitMask != NULL) &&
+ FindSpecifyFeature(FeatureList, &CpuFeature->Link, FALSE, CpuFeature->PackageBeforeFeatureBitMask)) {
+ return PackageDepType;
+ }
+
+ if ((CpuFeature->CoreBeforeFeatureBitMask != NULL) &&
+ FindSpecifyFeature(FeatureList, &CpuFeature->Link, FALSE, CpuFeature->CoreBeforeFeatureBitMask)) {
+ return CoreDepType;
+ }
+
+ if ((CpuFeature->BeforeFeatureBitMask != NULL) &&
+ FindSpecifyFeature(FeatureList, &CpuFeature->Link, FALSE, CpuFeature->BeforeFeatureBitMask)) {
+ return ThreadDepType;
+ }
+
+ return NoneDepType;
+ }
+
+ if ((CpuFeature->PackageAfterFeatureBitMask != NULL) &&
+ FindSpecifyFeature(FeatureList, &CpuFeature->Link, TRUE, CpuFeature->PackageAfterFeatureBitMask)) {
+ return PackageDepType;
+ }
+
+ if ((CpuFeature->CoreAfterFeatureBitMask != NULL) &&
+ FindSpecifyFeature(FeatureList, &CpuFeature->Link, TRUE, CpuFeature->CoreAfterFeatureBitMask)) {
+ return CoreDepType;
+ }
+
+ if ((CpuFeature->AfterFeatureBitMask != NULL) &&
+ FindSpecifyFeature(FeatureList, &CpuFeature->Link, TRUE, CpuFeature->AfterFeatureBitMask)) {
+ return ThreadDepType;
+ }
+
+ return NoneDepType;
+}
+
+/**
Base on dependence relationship to asjust feature dependence.
ONLY when the feature before(or after) the find feature also has