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UefiCpuPkg/MpInitLib: Implementation of MpInitLibGetProcessorInfo() 

v5:
  1. Remove (-1) and use the clean code to calculate the Location->Thread
     and Location->Core.

v4:
  1. Update HealthData type from UINT32 to EFI_HEALTH_FLAGS

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
This commit is contained in:
Jeff Fan 2016-07-21 21:12:46 +08:00
parent 809213a679
commit ad52f25edf
1 changed files with 173 additions and 1 deletions
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174
UefiCpuPkg/Library/MpInitLib/MpLib.c
View File

@ -57,6 +57,132 @@ IsBspExecuteDisableEnabled (
return Enabled;
}
/**
Get CPU Package/Core/Thread location information.
@param[in] InitialApicId CPU APIC ID
@param[out] Location Pointer to CPU location information
**/
VOID
ExtractProcessorLocation (
IN UINT32 InitialApicId,
OUT EFI_CPU_PHYSICAL_LOCATION *Location
)
{
BOOLEAN TopologyLeafSupported;
UINTN ThreadBits;
UINTN CoreBits;
CPUID_VERSION_INFO_EBX VersionInfoEbx;
CPUID_VERSION_INFO_EDX VersionInfoEdx;
CPUID_CACHE_PARAMS_EAX CacheParamsEax;
CPUID_EXTENDED_TOPOLOGY_EAX ExtendedTopologyEax;
CPUID_EXTENDED_TOPOLOGY_EBX ExtendedTopologyEbx;
CPUID_EXTENDED_TOPOLOGY_ECX ExtendedTopologyEcx;
UINT32 MaxCpuIdIndex;
UINT32 SubIndex;
UINTN LevelType;
UINT32 MaxLogicProcessorsPerPackage;
UINT32 MaxCoresPerPackage;
//
// Check if the processor is capable of supporting more than one logical processor.
//
AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, &VersionInfoEdx.Uint32);
if (VersionInfoEdx.Bits.HTT == 0) {
Location->Thread = 0;
Location->Core = 0;
Location->Package = 0;
return;
}
ThreadBits = 0;
CoreBits = 0;
//
// Assume three-level mapping of APIC ID: Package:Core:SMT.
//
TopologyLeafSupported = FALSE;
//
// Get the max index of basic CPUID
//
AsmCpuid (CPUID_SIGNATURE, &MaxCpuIdIndex, NULL, NULL, NULL);
//
// If the extended topology enumeration leaf is available, it
// is the preferred mechanism for enumerating topology.
//
if (MaxCpuIdIndex >= CPUID_EXTENDED_TOPOLOGY) {
AsmCpuidEx (
CPUID_EXTENDED_TOPOLOGY,
0,
&ExtendedTopologyEax.Uint32,
&ExtendedTopologyEbx.Uint32,
&ExtendedTopologyEcx.Uint32,
NULL
);
//
// If CPUID.(EAX=0BH, ECX=0H):EBX returns zero and maximum input value for
// basic CPUID information is greater than 0BH, then CPUID.0BH leaf is not
// supported on that processor.
//
if (ExtendedTopologyEbx.Uint32 != 0) {
TopologyLeafSupported = TRUE;
//
// Sub-leaf index 0 (ECX= 0 as input) provides enumeration parameters to extract
// the SMT sub-field of x2APIC ID.
//
LevelType = ExtendedTopologyEcx.Bits.LevelType;
ASSERT (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_SMT);
ThreadBits = ExtendedTopologyEax.Bits.ApicIdShift;
//
// Software must not assume any "level type" encoding
// value to be related to any sub-leaf index, except sub-leaf 0.
//
SubIndex = 1;
do {
AsmCpuidEx (
CPUID_EXTENDED_TOPOLOGY,
SubIndex,
&ExtendedTopologyEax.Uint32,
NULL,
&ExtendedTopologyEcx.Uint32,
NULL
);
LevelType = ExtendedTopologyEcx.Bits.LevelType;
if (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_CORE) {
CoreBits = ExtendedTopologyEax.Bits.ApicIdShift - ThreadBits;
break;
}
SubIndex++;
} while (LevelType != CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_INVALID);
}
}
if (!TopologyLeafSupported) {
AsmCpuid (CPUID_VERSION_INFO, NULL, &VersionInfoEbx.Uint32, NULL, NULL);
MaxLogicProcessorsPerPackage = VersionInfoEbx.Bits.MaximumAddressableIdsForLogicalProcessors;
if (MaxCpuIdIndex >= CPUID_CACHE_PARAMS) {
AsmCpuidEx (CPUID_CACHE_PARAMS, 0, &CacheParamsEax.Uint32, NULL, NULL, NULL);
MaxCoresPerPackage = CacheParamsEax.Bits.MaximumAddressableIdsForLogicalProcessors + 1;
} else {
//
// Must be a single-core processor.
//
MaxCoresPerPackage = 1;
}
ThreadBits = (UINTN) (HighBitSet32 (MaxLogicProcessorsPerPackage / MaxCoresPerPackage - 1) + 1);
CoreBits = (UINTN) (HighBitSet32 (MaxCoresPerPackage - 1) + 1);
}
Location->Thread = InitialApicId & ((1 << ThreadBits) - 1);
Location->Core = (InitialApicId >> ThreadBits) & ((1 << CoreBits) - 1);
Location->Package = (InitialApicId >> (ThreadBits + CoreBits));
}
/**
Get the Application Processors state.
@ -930,8 +1056,54 @@ MpInitLibGetProcessorInfo (
OUT EFI_HEALTH_FLAGS *HealthData OPTIONAL
)
{
return EFI_UNSUPPORTED;
CPU_MP_DATA *CpuMpData;
UINTN CallerNumber;
CpuMpData = GetCpuMpData ();
//
// Check whether caller processor is BSP
//
MpInitLibWhoAmI (&CallerNumber);
if (CallerNumber != CpuMpData->BspNumber) {
return EFI_DEVICE_ERROR;
}
if (ProcessorInfoBuffer == NULL) {
return EFI_INVALID_PARAMETER;
}
if (ProcessorNumber >= CpuMpData->CpuCount) {
return EFI_NOT_FOUND;
}
ProcessorInfoBuffer->ProcessorId = (UINT64) CpuMpData->CpuData[ProcessorNumber].ApicId;
ProcessorInfoBuffer->StatusFlag = 0;
if (ProcessorNumber == CpuMpData->BspNumber) {
ProcessorInfoBuffer->StatusFlag |= PROCESSOR_AS_BSP_BIT;
}
if (CpuMpData->CpuData[ProcessorNumber].CpuHealthy) {
ProcessorInfoBuffer->StatusFlag |= PROCESSOR_HEALTH_STATUS_BIT;
}
if (GetApState (&CpuMpData->CpuData[ProcessorNumber]) == CpuStateDisabled) {
ProcessorInfoBuffer->StatusFlag &= ~PROCESSOR_ENABLED_BIT;
} else {
ProcessorInfoBuffer->StatusFlag |= PROCESSOR_ENABLED_BIT;
}
//
// Get processor location information
//
ExtractProcessorLocation (CpuMpData->CpuData[ProcessorNumber].ApicId, &ProcessorInfoBuffer->Location);
if (HealthData != NULL) {
HealthData->Uint32 = CpuMpData->CpuData[ProcessorNumber].Health;
}
return EFI_SUCCESS;
}
/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.