tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
audk/UefiCpuPkg/PiSmmCpuDxeSmm/CpuService.c

487 lines
15 KiB
C
Raw Blame History

/** @file
Implementation of SMM CPU Services Protocol.
Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "PiSmmCpuDxeSmm.h"
//
// SMM CPU Service Protocol instance
//
EFI_SMM_CPU_SERVICE_PROTOCOL mSmmCpuService = {
SmmGetProcessorInfo,
SmmSwitchBsp,
SmmAddProcessor,
SmmRemoveProcessor,
SmmWhoAmI,
SmmRegisterExceptionHandler
};
/**
Get Package ID/Core ID/Thread ID of a processor.
APIC ID must be an initial APIC ID.
The algorithm below assumes the target system has symmetry across physical package boundaries
with respect to the number of logical processors per package, number of cores per package.
@param ApicId APIC ID of the target logical processor.
@param Location Returns the processor location information.
**/
VOID
SmmGetProcessorLocation (
IN UINT32 ApicId,
OUT EFI_CPU_PHYSICAL_LOCATION *Location
)
{
UINTN ThreadBits;
UINTN CoreBits;
UINT32 RegEax;
UINT32 RegEbx;
UINT32 RegEcx;
UINT32 RegEdx;
UINT32 MaxCpuIdIndex;
UINT32 SubIndex;
UINTN LevelType;
UINT32 MaxLogicProcessorsPerPackage;
UINT32 MaxCoresPerPackage;
BOOLEAN TopologyLeafSupported;
ASSERT (Location != NULL);
ThreadBits = 0;
CoreBits = 0;
TopologyLeafSupported = FALSE;
//
// Check if the processor is capable of supporting more than one logical processor.
//
AsmCpuid (CPUID_VERSION_INFO, NULL, NULL, NULL, &RegEdx);
ASSERT ((RegEdx & BIT28) != 0);
//
// Assume three-level mapping of APIC ID: Package:Core:SMT.
//
//
// 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, &RegEax, &RegEbx, &RegEcx, 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 ((RegEbx & 0xffff) != 0) {
TopologyLeafSupported = TRUE;
//
// Sub-leaf index 0 (ECX= 0 as input) provides enumeration parameters to extract
// the SMT sub-field of x2APIC ID.
//
LevelType = (RegEcx >> 8) & 0xff;
ASSERT (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_SMT);
if ((RegEbx & 0xffff) > 1 ) {
ThreadBits = RegEax & 0x1f;
} else {
//
// HT is not supported
//
ThreadBits = 0;
}
//
// 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, &RegEax, NULL, &RegEcx, NULL);
LevelType = (RegEcx >> 8) & 0xff;
if (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_CORE) {
CoreBits = (RegEax & 0x1f) - ThreadBits;
break;
}
SubIndex++;
} while (LevelType != CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_INVALID);
}
}
if (!TopologyLeafSupported) {
AsmCpuid (CPUID_VERSION_INFO, NULL, &RegEbx, NULL, NULL);
MaxLogicProcessorsPerPackage = (RegEbx >> 16) & 0xff;
if (MaxCpuIdIndex >= CPUID_CACHE_PARAMS) {
AsmCpuidEx (CPUID_CACHE_PARAMS, 0, &RegEax, NULL, NULL, NULL);
MaxCoresPerPackage = (RegEax >> 26) + 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 = ApicId & ~((-1) << ThreadBits);
Location->Core = (ApicId >> ThreadBits) & ~((-1) << CoreBits);
Location->Package = (ApicId >> (ThreadBits+ CoreBits));
}
/**
Gets processor information on the requested processor at the instant this call is made.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of processor.
@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
the requested processor is deposited.
@retval EFI_SUCCESS Processor information was returned.
@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist in the platform.
**/
EFI_STATUS
EFIAPI
SmmGetProcessorInfo (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN UINTN ProcessorNumber,
OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
)
{
//
// Check parameter
//
if (ProcessorNumber >= mMaxNumberOfCpus || ProcessorInfoBuffer == NULL) {
return EFI_INVALID_PARAMETER;
}
if (gSmmCpuPrivate->ProcessorInfo[ProcessorNumber].ProcessorId == INVALID_APIC_ID) {
return EFI_NOT_FOUND;
}
//
// Fill in processor information
//
CopyMem (ProcessorInfoBuffer, &gSmmCpuPrivate->ProcessorInfo[ProcessorNumber], sizeof (EFI_PROCESSOR_INFORMATION));
return EFI_SUCCESS;
}
/**
This service switches the requested AP to be the BSP since the next SMI.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of AP that is to become the new BSP.
@retval EFI_SUCCESS BSP will be switched in next SMI.
@retval EFI_UNSUPPORTED Switching the BSP or a processor to be hot-removed is not supported.
@retval EFI_NOT_FOUND The processor with the handle specified by ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
**/
EFI_STATUS
EFIAPI
SmmSwitchBsp (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN UINTN ProcessorNumber
)
{
//
// Check parameter
//
if (ProcessorNumber >= mMaxNumberOfCpus) {
return EFI_INVALID_PARAMETER;
}
if (gSmmCpuPrivate->ProcessorInfo[ProcessorNumber].ProcessorId == INVALID_APIC_ID) {
return EFI_NOT_FOUND;
}
if (gSmmCpuPrivate->Operation[ProcessorNumber] != SmmCpuNone ||
gSmst->CurrentlyExecutingCpu == ProcessorNumber) {
return EFI_UNSUPPORTED;
}
//
// Setting of the BSP for next SMI is pending until all SMI handlers are finished
//
gSmmCpuPrivate->Operation[ProcessorNumber] = SmmCpuSwitchBsp;
return EFI_SUCCESS;
}
/**
Notify that a processor was hot-added.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[in] ProcessorId Local APIC ID of the hot-added processor.
@param[out] ProcessorNumber The handle number of the hot-added processor.
@retval EFI_SUCCESS The hot-addition of the specified processors was successfully notified.
@retval EFI_UNSUPPORTED Hot addition of processor is not supported.
@retval EFI_NOT_FOUND The processor with the handle specified by ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
@retval EFI_ALREADY_STARTED The processor is already online in the system.
**/
EFI_STATUS
EFIAPI
SmmAddProcessor (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN UINT64 ProcessorId,
OUT UINTN *ProcessorNumber
)
{
UINTN Index;
if (!FeaturePcdGet (PcdCpuHotPlugSupport)) {
return EFI_UNSUPPORTED;
}
//
// Check parameter
//
if (ProcessorNumber == NULL || ProcessorId == INVALID_APIC_ID) {
return EFI_INVALID_PARAMETER;
}
//
// Check if the processor already exists
//
for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
if (gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId == ProcessorId) {
return EFI_ALREADY_STARTED;
}
}
//
// Check CPU hot plug data. The CPU RAS handler should have created the mapping
// of the APIC ID to SMBASE.
//
for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
if (mCpuHotPlugData.ApicId[Index] == ProcessorId &&
gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId == INVALID_APIC_ID) {
gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId = ProcessorId;
gSmmCpuPrivate->ProcessorInfo[Index].StatusFlag = 0;
SmmGetProcessorLocation ((UINT32)ProcessorId, &gSmmCpuPrivate->ProcessorInfo[Index].Location);
*ProcessorNumber = Index;
gSmmCpuPrivate->Operation[Index] = SmmCpuAdd;
return EFI_SUCCESS;
}
}
return EFI_INVALID_PARAMETER;
}
/**
Notify that a processor was hot-removed.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[in] ProcessorNumber The handle number of the hot-added processor.
@retval EFI_SUCCESS The hot-removal of the specified processors was successfully notified.
@retval EFI_UNSUPPORTED Hot removal of processor is not supported.
@retval EFI_UNSUPPORTED Hot removal of BSP is not supported.
@retval EFI_UNSUPPORTED Hot removal of a processor with pending hot-plug operation is not supported.
@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
**/
EFI_STATUS
EFIAPI
SmmRemoveProcessor (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN UINTN ProcessorNumber
)
{
if (!FeaturePcdGet (PcdCpuHotPlugSupport)) {
return EFI_UNSUPPORTED;
}
//
// Check parameter
//
if (ProcessorNumber >= mMaxNumberOfCpus ||
gSmmCpuPrivate->ProcessorInfo[ProcessorNumber].ProcessorId == INVALID_APIC_ID) {
return EFI_INVALID_PARAMETER;
}
//
// Can't remove BSP
//
if (ProcessorNumber == gSmmCpuPrivate->SmmCoreEntryContext.CurrentlyExecutingCpu) {
return EFI_UNSUPPORTED;
}
if (gSmmCpuPrivate->Operation[ProcessorNumber] != SmmCpuNone) {
return EFI_UNSUPPORTED;
}
gSmmCpuPrivate->ProcessorInfo[ProcessorNumber].ProcessorId = INVALID_APIC_ID;
mCpuHotPlugData.ApicId[ProcessorNumber] = INVALID_APIC_ID;
//
// Removal of the processor from the CPU list is pending until all SMI handlers are finished
//
gSmmCpuPrivate->Operation[ProcessorNumber] = SmmCpuRemove;
return EFI_SUCCESS;
}
/**
This return the handle number for the calling processor.
@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
@param[out] ProcessorNumber The handle number of currently executing processor.
@retval EFI_SUCCESS The current processor handle number was returned
in ProcessorNumber.
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
**/
EFI_STATUS
EFIAPI
SmmWhoAmI (
IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
OUT UINTN *ProcessorNumber
)
{
UINTN Index;
UINT64 ApicId;
//
// Check parameter
//
if (ProcessorNumber == NULL) {
return EFI_INVALID_PARAMETER;
}
ApicId = GetApicId ();
for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
if (gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId == ApicId) {
*ProcessorNumber = Index;
return EFI_SUCCESS;
}
}
//
// This should not happen
//
ASSERT (FALSE);
return EFI_NOT_FOUND;
}
/**
Update the SMM CPU list per the pending operation.
This function is called after return from SMI handlers.
**/
VOID
SmmCpuUpdate (
VOID
)
{
UINTN Index;
//
// Handle pending BSP switch operations
//
for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
if (gSmmCpuPrivate->Operation[Index] == SmmCpuSwitchBsp) {
gSmmCpuPrivate->Operation[Index] = SmmCpuNone;
mSmmMpSyncData->SwitchBsp = TRUE;
mSmmMpSyncData->CandidateBsp[Index] = TRUE;
}
}
//
// Handle pending hot-add operations
//
for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
if (gSmmCpuPrivate->Operation[Index] == SmmCpuAdd) {
gSmmCpuPrivate->Operation[Index] = SmmCpuNone;
mNumberOfCpus++;
}
}
//
// Handle pending hot-remove operations
//
for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
if (gSmmCpuPrivate->Operation[Index] == SmmCpuRemove) {
gSmmCpuPrivate->Operation[Index] = SmmCpuNone;
mNumberOfCpus--;
}
}
}
/**
Register exception handler.
@param This A pointer to the SMM_CPU_SERVICE_PROTOCOL instance.
@param ExceptionType Defines which interrupt or exception to hook. Type EFI_EXCEPTION_TYPE and
the valid values for this parameter are defined in EFI_DEBUG_SUPPORT_PROTOCOL
of the UEFI 2.0 specification.
@param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER
that is called when a processor interrupt occurs.
If this parameter is NULL, then the handler will be uninstalled.
@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was previously installed.
@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not previously installed.
@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.
**/
EFI_STATUS
EFIAPI
SmmRegisterExceptionHandler (
IN EFI_SMM_CPU_SERVICE_PROTOCOL *This,
IN EFI_EXCEPTION_TYPE ExceptionType,
IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
)
{
return RegisterCpuInterruptHandler (ExceptionType, InterruptHandler);
}
/**
Initialize SMM CPU Services.
It installs EFI SMM CPU Services Protocol.
@param ImageHandle The firmware allocated handle for the EFI image.
@retval EFI_SUCCESS EFI SMM CPU Services Protocol was installed successfully.
**/
EFI_STATUS
InitializeSmmCpuServices (
IN EFI_HANDLE Handle
)
{
EFI_STATUS Status;
Status = gSmst->SmmInstallProtocolInterface (
&Handle,
&gEfiSmmCpuServiceProtocolGuid,
EFI_NATIVE_INTERFACE,
&mSmmCpuService
);
ASSERT_EFI_ERROR (Status);
return Status;
}
Reference in New Issue View Git Blame Copy Permalink