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367 lines
11 KiB
C
367 lines
11 KiB
C
/** @file
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Implementation of SMM CPU Services Protocol.
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Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "PiSmmCpuDxeSmm.h"
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//
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// SMM CPU Service Protocol instance
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//
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EFI_SMM_CPU_SERVICE_PROTOCOL mSmmCpuService = {
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SmmGetProcessorInfo,
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SmmSwitchBsp,
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SmmAddProcessor,
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SmmRemoveProcessor,
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SmmWhoAmI,
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SmmRegisterExceptionHandler
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};
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/**
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Gets processor information on the requested processor at the instant this call is made.
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@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
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@param[in] ProcessorNumber The handle number of processor.
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@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
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the requested processor is deposited.
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@retval EFI_SUCCESS Processor information was returned.
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@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
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@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
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@retval EFI_NOT_FOUND The processor with the handle specified by
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ProcessorNumber does not exist in the platform.
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**/
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EFI_STATUS
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EFIAPI
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SmmGetProcessorInfo (
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IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
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IN UINTN ProcessorNumber,
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OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
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)
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{
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//
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// Check parameter
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//
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if (ProcessorNumber >= mMaxNumberOfCpus || ProcessorInfoBuffer == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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if (gSmmCpuPrivate->ProcessorInfo[ProcessorNumber].ProcessorId == INVALID_APIC_ID) {
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return EFI_NOT_FOUND;
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}
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//
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// Fill in processor information
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//
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CopyMem (ProcessorInfoBuffer, &gSmmCpuPrivate->ProcessorInfo[ProcessorNumber], sizeof (EFI_PROCESSOR_INFORMATION));
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return EFI_SUCCESS;
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}
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/**
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This service switches the requested AP to be the BSP since the next SMI.
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@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
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@param[in] ProcessorNumber The handle number of AP that is to become the new BSP.
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@retval EFI_SUCCESS BSP will be switched in next SMI.
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@retval EFI_UNSUPPORTED Switching the BSP or a processor to be hot-removed is not supported.
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@retval EFI_NOT_FOUND The processor with the handle specified by ProcessorNumber does not exist.
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@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
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**/
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EFI_STATUS
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EFIAPI
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SmmSwitchBsp (
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IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
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IN UINTN ProcessorNumber
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)
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{
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//
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// Check parameter
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//
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if (ProcessorNumber >= mMaxNumberOfCpus) {
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return EFI_INVALID_PARAMETER;
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}
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if (gSmmCpuPrivate->ProcessorInfo[ProcessorNumber].ProcessorId == INVALID_APIC_ID) {
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return EFI_NOT_FOUND;
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}
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if (gSmmCpuPrivate->Operation[ProcessorNumber] != SmmCpuNone ||
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gSmst->CurrentlyExecutingCpu == ProcessorNumber) {
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return EFI_UNSUPPORTED;
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}
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//
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// Setting of the BSP for next SMI is pending until all SMI handlers are finished
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//
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gSmmCpuPrivate->Operation[ProcessorNumber] = SmmCpuSwitchBsp;
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return EFI_SUCCESS;
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}
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/**
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Notify that a processor was hot-added.
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@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
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@param[in] ProcessorId Local APIC ID of the hot-added processor.
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@param[out] ProcessorNumber The handle number of the hot-added processor.
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@retval EFI_SUCCESS The hot-addition of the specified processors was successfully notified.
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@retval EFI_UNSUPPORTED Hot addition of processor is not supported.
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@retval EFI_NOT_FOUND The processor with the handle specified by ProcessorNumber does not exist.
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@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
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@retval EFI_ALREADY_STARTED The processor is already online in the system.
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**/
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EFI_STATUS
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EFIAPI
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SmmAddProcessor (
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IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
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IN UINT64 ProcessorId,
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OUT UINTN *ProcessorNumber
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)
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{
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UINTN Index;
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if (!FeaturePcdGet (PcdCpuHotPlugSupport)) {
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return EFI_UNSUPPORTED;
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}
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//
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// Check parameter
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//
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if (ProcessorNumber == NULL || ProcessorId == INVALID_APIC_ID) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check if the processor already exists
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//
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for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
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if (gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId == ProcessorId) {
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return EFI_ALREADY_STARTED;
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}
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}
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//
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// Check CPU hot plug data. The CPU RAS handler should have created the mapping
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// of the APIC ID to SMBASE.
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//
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for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
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if (mCpuHotPlugData.ApicId[Index] == ProcessorId &&
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gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId == INVALID_APIC_ID) {
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gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId = ProcessorId;
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gSmmCpuPrivate->ProcessorInfo[Index].StatusFlag = 0;
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GetProcessorLocationByApicId (
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(UINT32)ProcessorId,
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&gSmmCpuPrivate->ProcessorInfo[Index].Location.Package,
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&gSmmCpuPrivate->ProcessorInfo[Index].Location.Core,
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&gSmmCpuPrivate->ProcessorInfo[Index].Location.Thread
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);
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*ProcessorNumber = Index;
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gSmmCpuPrivate->Operation[Index] = SmmCpuAdd;
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return EFI_SUCCESS;
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}
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}
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return EFI_INVALID_PARAMETER;
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}
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/**
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Notify that a processor was hot-removed.
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@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
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@param[in] ProcessorNumber The handle number of the hot-added processor.
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@retval EFI_SUCCESS The hot-removal of the specified processors was successfully notified.
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@retval EFI_UNSUPPORTED Hot removal of processor is not supported.
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@retval EFI_UNSUPPORTED Hot removal of BSP is not supported.
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@retval EFI_UNSUPPORTED Hot removal of a processor with pending hot-plug operation is not supported.
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@retval EFI_INVALID_PARAMETER ProcessorNumber is invalid.
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**/
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EFI_STATUS
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EFIAPI
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SmmRemoveProcessor (
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IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
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IN UINTN ProcessorNumber
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)
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{
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if (!FeaturePcdGet (PcdCpuHotPlugSupport)) {
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return EFI_UNSUPPORTED;
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}
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//
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// Check parameter
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//
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if (ProcessorNumber >= mMaxNumberOfCpus ||
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gSmmCpuPrivate->ProcessorInfo[ProcessorNumber].ProcessorId == INVALID_APIC_ID) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Can't remove BSP
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//
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if (ProcessorNumber == gSmmCpuPrivate->SmmCoreEntryContext.CurrentlyExecutingCpu) {
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return EFI_UNSUPPORTED;
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}
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if (gSmmCpuPrivate->Operation[ProcessorNumber] != SmmCpuNone) {
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return EFI_UNSUPPORTED;
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}
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gSmmCpuPrivate->ProcessorInfo[ProcessorNumber].ProcessorId = INVALID_APIC_ID;
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mCpuHotPlugData.ApicId[ProcessorNumber] = INVALID_APIC_ID;
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//
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// Removal of the processor from the CPU list is pending until all SMI handlers are finished
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//
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gSmmCpuPrivate->Operation[ProcessorNumber] = SmmCpuRemove;
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return EFI_SUCCESS;
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}
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/**
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This return the handle number for the calling processor.
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@param[in] This A pointer to the EFI_SMM_CPU_SERVICE_PROTOCOL instance.
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@param[out] ProcessorNumber The handle number of currently executing processor.
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@retval EFI_SUCCESS The current processor handle number was returned
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in ProcessorNumber.
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@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
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**/
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EFI_STATUS
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EFIAPI
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SmmWhoAmI (
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IN CONST EFI_SMM_CPU_SERVICE_PROTOCOL *This,
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OUT UINTN *ProcessorNumber
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)
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{
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UINTN Index;
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UINT64 ApicId;
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//
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// Check parameter
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//
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if (ProcessorNumber == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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ApicId = GetApicId ();
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for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
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if (gSmmCpuPrivate->ProcessorInfo[Index].ProcessorId == ApicId) {
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*ProcessorNumber = Index;
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return EFI_SUCCESS;
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}
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}
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//
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// This should not happen
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//
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ASSERT (FALSE);
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return EFI_NOT_FOUND;
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}
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/**
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Update the SMM CPU list per the pending operation.
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This function is called after return from SMI handlers.
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**/
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VOID
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SmmCpuUpdate (
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VOID
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)
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{
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UINTN Index;
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//
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// Handle pending BSP switch operations
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//
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for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
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if (gSmmCpuPrivate->Operation[Index] == SmmCpuSwitchBsp) {
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gSmmCpuPrivate->Operation[Index] = SmmCpuNone;
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mSmmMpSyncData->SwitchBsp = TRUE;
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mSmmMpSyncData->CandidateBsp[Index] = TRUE;
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}
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}
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//
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// Handle pending hot-add operations
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//
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for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
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if (gSmmCpuPrivate->Operation[Index] == SmmCpuAdd) {
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gSmmCpuPrivate->Operation[Index] = SmmCpuNone;
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mNumberOfCpus++;
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}
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}
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//
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// Handle pending hot-remove operations
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//
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for (Index = 0; Index < mMaxNumberOfCpus; Index++) {
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if (gSmmCpuPrivate->Operation[Index] == SmmCpuRemove) {
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gSmmCpuPrivate->Operation[Index] = SmmCpuNone;
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mNumberOfCpus--;
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}
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}
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}
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/**
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Register exception handler.
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@param This A pointer to the SMM_CPU_SERVICE_PROTOCOL instance.
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@param ExceptionType Defines which interrupt or exception to hook. Type EFI_EXCEPTION_TYPE and
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the valid values for this parameter are defined in EFI_DEBUG_SUPPORT_PROTOCOL
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of the UEFI 2.0 specification.
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@param InterruptHandler A pointer to a function of type EFI_CPU_INTERRUPT_HANDLER
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that is called when a processor interrupt occurs.
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If this parameter is NULL, then the handler will be uninstalled.
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@retval EFI_SUCCESS The handler for the processor interrupt was successfully installed or uninstalled.
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@retval EFI_ALREADY_STARTED InterruptHandler is not NULL, and a handler for InterruptType was previously installed.
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@retval EFI_INVALID_PARAMETER InterruptHandler is NULL, and a handler for InterruptType was not previously installed.
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@retval EFI_UNSUPPORTED The interrupt specified by InterruptType is not supported.
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**/
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EFI_STATUS
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EFIAPI
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SmmRegisterExceptionHandler (
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IN EFI_SMM_CPU_SERVICE_PROTOCOL *This,
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IN EFI_EXCEPTION_TYPE ExceptionType,
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IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler
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)
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{
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return RegisterCpuInterruptHandler (ExceptionType, InterruptHandler);
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}
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/**
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Initialize SMM CPU Services.
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It installs EFI SMM CPU Services Protocol.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@retval EFI_SUCCESS EFI SMM CPU Services Protocol was installed successfully.
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**/
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EFI_STATUS
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InitializeSmmCpuServices (
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IN EFI_HANDLE Handle
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)
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{
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EFI_STATUS Status;
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Status = gSmst->SmmInstallProtocolInterface (
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&Handle,
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&gEfiSmmCpuServiceProtocolGuid,
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EFI_NATIVE_INTERFACE,
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&mSmmCpuService
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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