blob: 391b64e9f2228d92ff7fd3ecc9b932a3de79b5bf [file] [log] [blame]
/** @file
Implementation of SMM CPU Services Protocol.
Copyright (c) 2011 - 2023, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "PiSmmCpuDxeSmm.h"
//
// SMM CPU Service Protocol instance
//
EFI_SMM_CPU_SERVICE_PROTOCOL mSmmCpuService = {
SmmGetProcessorInfo,
SmmSwitchBsp,
SmmAddProcessor,
SmmRemoveProcessor,
SmmWhoAmI,
SmmRegisterExceptionHandler
};
//
// EDKII SMM CPU Rendezvous Service Protocol instance
//
EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL mSmmCpuRendezvousService = {
SmmCpuRendezvous
};
/**
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;
GetProcessorLocationByApicId (
(UINT32)ProcessorId,
&gSmmCpuPrivate->ProcessorInfo[Index].Location.Package,
&gSmmCpuPrivate->ProcessorInfo[Index].Location.Core,
&gSmmCpuPrivate->ProcessorInfo[Index].Location.Thread
);
*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.
@retval OTHER Fail to install Protocol.
**/
EFI_STATUS
InitializeSmmCpuServices (
IN EFI_HANDLE Handle
)
{
EFI_STATUS Status;
Status = gSmst->SmmInstallProtocolInterface (
&Handle,
&gEfiSmmCpuServiceProtocolGuid,
EFI_NATIVE_INTERFACE,
&mSmmCpuService
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
return Status;
}
Status = gSmst->SmmInstallProtocolInterface (
&Handle,
&gEdkiiSmmCpuRendezvousProtocolGuid,
EFI_NATIVE_INTERFACE,
&mSmmCpuRendezvousService
);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Wait for all processors enterring SMM until all CPUs are already synchronized or not.
If BlockingMode is False, timeout value is zero.
@param This A pointer to the EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL instance.
@param BlockingMode Blocking mode or non-blocking mode.
@retval EFI_SUCCESS All avaiable APs arrived.
@retval EFI_TIMEOUT Wait for all APs until timeout.
**/
EFI_STATUS
EFIAPI
SmmCpuRendezvous (
IN EDKII_SMM_CPU_RENDEZVOUS_PROTOCOL *This,
IN BOOLEAN BlockingMode
)
{
EFI_STATUS Status;
//
// Return success immediately if all CPUs are already synchronized.
//
if (mSmmMpSyncData->AllApArrivedWithException) {
Status = EFI_SUCCESS;
goto ON_EXIT;
}
if (!BlockingMode) {
Status = EFI_TIMEOUT;
goto ON_EXIT;
}
if ((mSmmMpSyncData->EffectiveSyncMode != SmmCpuSyncModeTradition) && !SmmCpuFeaturesNeedConfigureMtrrs ()) {
//
// There are some APs outside SMM, Wait for all avaiable APs to arrive.
//
SmmWaitForApArrival ();
Status = mSmmMpSyncData->AllApArrivedWithException ? EFI_SUCCESS : EFI_TIMEOUT;
} else {
//
// BSP has already waitted for APs to arrive SMM if SmmCpuSyncMode selected or need config MTRR.
//
Status = EFI_TIMEOUT;
}
ON_EXIT:
if (!mSmmMpSyncData->AllApArrivedWithException) {
DEBUG ((DEBUG_INFO, "EdkiiSmmWaitForAllApArrival: Timeout to wait all APs arrival\n"));
}
return Status;
}