From 89bb926a041b03c3926bf21266cbdf735d9aee66 Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Wed, 13 Mar 2024 15:16:47 +0000 Subject: [efi] Provide a multiprocessor API for EFI Provide an implementation of the iPXE multiprocessor API for EFI, based on using EFI_MP_SERVICES to start up a wrapper function on all application processors. Note that the processor numbers used by EFI_MP_SERVICES are opaque integers that bear no relation to the underlying CPU identity (e.g. the APIC ID), and so we must rely on our own (architecture- specific) implementation to determine the relevant CPU identifiers. Signed-off-by: Michael Brown --- src/config/defaults/efi.h | 2 +- src/include/ipxe/efi/Protocol/MpService.h | 676 ++++++++++++++++++++++++++++++ src/include/ipxe/efi/efi_mp.h | 30 ++ src/include/ipxe/errfile.h | 1 + src/include/ipxe/mp.h | 1 + src/interface/efi/efi_mp.c | 112 +++++ 6 files changed, 821 insertions(+), 1 deletion(-) create mode 100644 src/include/ipxe/efi/Protocol/MpService.h create mode 100644 src/include/ipxe/efi/efi_mp.h create mode 100644 src/interface/efi/efi_mp.c diff --git a/src/config/defaults/efi.h b/src/config/defaults/efi.h index 9c0f238a..b62ddb46 100644 --- a/src/config/defaults/efi.h +++ b/src/config/defaults/efi.h @@ -25,7 +25,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #define REBOOT_EFI #define ACPI_EFI #define FDT_EFI -#define MPAPI_NULL +#define MPAPI_EFI #define NET_PROTO_IPV6 /* IPv6 protocol */ #define NET_PROTO_LLDP /* Link Layer Discovery protocol */ diff --git a/src/include/ipxe/efi/Protocol/MpService.h b/src/include/ipxe/efi/Protocol/MpService.h new file mode 100644 index 00000000..cd1bb27f --- /dev/null +++ b/src/include/ipxe/efi/Protocol/MpService.h @@ -0,0 +1,676 @@ +/** @file + When installed, the MP Services Protocol produces a collection of services + that are needed for MP management. + + The MP Services Protocol provides a generalized way of performing following tasks: + - Retrieving information of multi-processor environment and MP-related status of + specific processors. + - Dispatching user-provided function to APs. + - Maintain MP-related processor status. + + The MP Services Protocol must be produced on any system with more than one logical + processor. + + The Protocol is available only during boot time. + + MP Services Protocol is hardware-independent. Most of the logic of this protocol + is architecturally neutral. It abstracts the multi-processor environment and + status of processors, and provides interfaces to retrieve information, maintain, + and dispatch. + + MP Services Protocol may be consumed by ACPI module. The ACPI module may use this + protocol to retrieve data that are needed for an MP platform and report them to OS. + MP Services Protocol may also be used to program and configure processors, such + as MTRR synchronization for memory space attributes setting in DXE Services. + MP Services Protocol may be used by non-CPU DXE drivers to speed up platform boot + by taking advantage of the processing capabilities of the APs, for example, using + APs to help test system memory in parallel with other device initialization. + Diagnostics applications may also use this protocol for multi-processor. + +Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.
+SPDX-License-Identifier: BSD-2-Clause-Patent + + @par Revision Reference: + This Protocol is defined in the UEFI Platform Initialization Specification 1.2, + Volume 2:Driver Execution Environment Core Interface. + +**/ + +#ifndef _MP_SERVICE_PROTOCOL_H_ +#define _MP_SERVICE_PROTOCOL_H_ + +FILE_LICENCE ( BSD2_PATENT ); + +/// +/// Global ID for the EFI_MP_SERVICES_PROTOCOL. +/// +#define EFI_MP_SERVICES_PROTOCOL_GUID \ + { \ + 0x3fdda605, 0xa76e, 0x4f46, {0xad, 0x29, 0x12, 0xf4, 0x53, 0x1b, 0x3d, 0x08} \ + } + +/// +/// Value used in the NumberProcessors parameter of the GetProcessorInfo function +/// +#define CPU_V2_EXTENDED_TOPOLOGY BIT24 + +/// +/// Forward declaration for the EFI_MP_SERVICES_PROTOCOL. +/// +typedef struct _EFI_MP_SERVICES_PROTOCOL EFI_MP_SERVICES_PROTOCOL; + +/// +/// Terminator for a list of failed CPUs returned by StartAllAPs(). +/// +#define END_OF_CPU_LIST 0xffffffff + +/// +/// This bit is used in the StatusFlag field of EFI_PROCESSOR_INFORMATION and +/// indicates whether the processor is playing the role of BSP. If the bit is 1, +/// then the processor is BSP. Otherwise, it is AP. +/// +#define PROCESSOR_AS_BSP_BIT 0x00000001 + +/// +/// This bit is used in the StatusFlag field of EFI_PROCESSOR_INFORMATION and +/// indicates whether the processor is enabled. If the bit is 1, then the +/// processor is enabled. Otherwise, it is disabled. +/// +#define PROCESSOR_ENABLED_BIT 0x00000002 + +/// +/// This bit is used in the StatusFlag field of EFI_PROCESSOR_INFORMATION and +/// indicates whether the processor is healthy. If the bit is 1, then the +/// processor is healthy. Otherwise, some fault has been detected for the processor. +/// +#define PROCESSOR_HEALTH_STATUS_BIT 0x00000004 + +/// +/// Structure that describes the pyhiscal location of a logical CPU. +/// +typedef struct { + /// + /// Zero-based physical package number that identifies the cartridge of the processor. + /// + UINT32 Package; + /// + /// Zero-based physical core number within package of the processor. + /// + UINT32 Core; + /// + /// Zero-based logical thread number within core of the processor. + /// + UINT32 Thread; +} EFI_CPU_PHYSICAL_LOCATION; + +/// +/// Structure that defines the 6-level physical location of the processor +/// +typedef struct { + /// + /// Package Zero-based physical package number that identifies the cartridge of the processor. + /// + UINT32 Package; + /// + /// Module Zero-based physical module number within package of the processor. + /// + UINT32 Module; + /// + /// Tile Zero-based physical tile number within module of the processor. + /// + UINT32 Tile; + /// + /// Die Zero-based physical die number within tile of the processor. + /// + UINT32 Die; + /// + /// Core Zero-based physical core number within die of the processor. + /// + UINT32 Core; + /// + /// Thread Zero-based logical thread number within core of the processor. + /// + UINT32 Thread; +} EFI_CPU_PHYSICAL_LOCATION2; + +typedef union { + /// The 6-level physical location of the processor, including the + /// physical package number that identifies the cartridge, the physical + /// module number within package, the physical tile number within the module, + /// the physical die number within the tile, the physical core number within + /// package, and logical thread number within core. + EFI_CPU_PHYSICAL_LOCATION2 Location2; +} EXTENDED_PROCESSOR_INFORMATION; + +/// +/// Structure that describes information about a logical CPU. +/// +typedef struct { + /// + /// The unique processor ID determined by system hardware. For IA32 and X64, + /// the processor ID is the same as the Local APIC ID. Only the lower 8 bits + /// are used, and higher bits are reserved. For IPF, the lower 16 bits contains + /// id/eid, and higher bits are reserved. + /// + UINT64 ProcessorId; + /// + /// Flags indicating if the processor is BSP or AP, if the processor is enabled + /// or disabled, and if the processor is healthy. Bits 3..31 are reserved and + /// must be 0. + /// + /// 
+  /// BSP  ENABLED  HEALTH  Description
+  /// ===  =======  ======  ===================================================
+  ///  0      0       0     Unhealthy Disabled AP.
+  ///  0      0       1     Healthy Disabled AP.
+  ///  0      1       0     Unhealthy Enabled AP.
+  ///  0      1       1     Healthy Enabled AP.
+  ///  1      0       0     Invalid. The BSP can never be in the disabled state.
+  ///  1      0       1     Invalid. The BSP can never be in the disabled state.
+  ///  1      1       0     Unhealthy Enabled BSP.
+  ///  1      1       1     Healthy Enabled BSP.
+  ///
+ /// + UINT32 StatusFlag; + /// + /// The physical location of the processor, including the physical package number + /// that identifies the cartridge, the physical core number within package, and + /// logical thread number within core. + /// + EFI_CPU_PHYSICAL_LOCATION Location; + /// + /// The extended information of the processor. This field is filled only when + /// CPU_V2_EXTENDED_TOPOLOGY is set in parameter ProcessorNumber. + EXTENDED_PROCESSOR_INFORMATION ExtendedInformation; +} EFI_PROCESSOR_INFORMATION; + +/** + This service retrieves the number of logical processor in the platform + and the number of those logical processors that are enabled on this boot. + This service may only be called from the BSP. + + This function is used to retrieve the following information: + - The number of logical processors that are present in the system. + - The number of enabled logical processors in the system at the instant + this call is made. + + Because MP Service Protocol provides services to enable and disable processors + dynamically, the number of enabled logical processors may vary during the + course of a boot session. + + If this service is called from an AP, then EFI_DEVICE_ERROR is returned. + If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then + EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors + is returned in NumberOfProcessors, the number of currently enabled processor + is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned. + + @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL + instance. + @param[out] NumberOfProcessors Pointer to the total number of logical + processors in the system, including the BSP + and disabled APs. + @param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical + processors that exist in system, including + the BSP. + + @retval EFI_SUCCESS The number of logical processors and enabled + logical processors was retrieved. + @retval EFI_DEVICE_ERROR The calling processor is an AP. + @retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL. + @retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MP_SERVICES_GET_NUMBER_OF_PROCESSORS)( + IN EFI_MP_SERVICES_PROTOCOL *This, + OUT UINTN *NumberOfProcessors, + OUT UINTN *NumberOfEnabledProcessors + ); + +/** + Gets detailed MP-related information on the requested processor at the + instant this call is made. This service may only be called from the BSP. + + This service retrieves detailed MP-related information about any processor + on the platform. Note the following: + - The processor information may change during the course of a boot session. + - The information presented here is entirely MP related. + + Information regarding the number of caches and their sizes, frequency of operation, + slot numbers is all considered platform-related information and is not provided + by this service. + + @param[in] This A pointer to the EFI_MP_SERVICES_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_DEVICE_ERROR The calling processor is an AP. + @retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL. + @retval EFI_NOT_FOUND The processor with the handle specified by + ProcessorNumber does not exist in the platform. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MP_SERVICES_GET_PROCESSOR_INFO)( + IN EFI_MP_SERVICES_PROTOCOL *This, + IN UINTN ProcessorNumber, + OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer + ); + +/** + This service executes a caller provided function on all enabled APs. APs can + run either simultaneously or one at a time in sequence. This service supports + both blocking and non-blocking requests. The non-blocking requests use EFI + events so the BSP can detect when the APs have finished. This service may only + be called from the BSP. + + This function is used to dispatch all the enabled APs to the function specified + by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned + immediately and Procedure is not started on any AP. + + If SingleThread is TRUE, all the enabled APs execute the function specified by + Procedure one by one, in ascending order of processor handle number. Otherwise, + all the enabled APs execute the function specified by Procedure simultaneously. + + If WaitEvent is NULL, execution is in blocking mode. The BSP waits until all + APs finish or TimeoutInMicroSecs expires. Otherwise, execution is in non-blocking + mode, and the BSP returns from this service without waiting for APs. If a + non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT + is signaled, then EFI_UNSUPPORTED must be returned. + + If the timeout specified by TimeoutInMicroseconds expires before all APs return + from Procedure, then Procedure on the failed APs is terminated. All enabled APs + are always available for further calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() + and EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If FailedCpuList is not NULL, its + content points to the list of processor handle numbers in which Procedure was + terminated. + + Note: It is the responsibility of the consumer of the EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() + to make sure that the nature of the code that is executed on the BSP and the + dispatched APs is well controlled. The MP Services Protocol does not guarantee + that the Procedure function is MP-safe. Hence, the tasks that can be run in + parallel are limited to certain independent tasks and well-controlled exclusive + code. EFI services and protocols may not be called by APs unless otherwise + specified. + + In blocking execution mode, BSP waits until all APs finish or + TimeoutInMicroSeconds expires. + + In non-blocking execution mode, BSP is freed to return to the caller and then + proceed to the next task without having to wait for APs. The following + sequence needs to occur in a non-blocking execution mode: + + -# The caller that intends to use this MP Services Protocol in non-blocking + mode creates WaitEvent by calling the EFI CreateEvent() service. The caller + invokes EFI_MP_SERVICES_PROTOCOL.StartupAllAPs(). If the parameter WaitEvent + is not NULL, then StartupAllAPs() executes in non-blocking mode. It requests + the function specified by Procedure to be started on all the enabled APs, + and releases the BSP to continue with other tasks. + -# The caller can use the CheckEvent() and WaitForEvent() services to check + the state of the WaitEvent created in step 1. + -# When the APs complete their task or TimeoutInMicroSecondss expires, the MP + Service signals WaitEvent by calling the EFI SignalEvent() function. If + FailedCpuList is not NULL, its content is available when WaitEvent is + signaled. If all APs returned from Procedure prior to the timeout, then + FailedCpuList is set to NULL. If not all APs return from Procedure before + the timeout, then FailedCpuList is filled in with the list of the failed + APs. The buffer is allocated by MP Service Protocol using AllocatePool(). + It is the caller's responsibility to free the buffer with FreePool() service. + -# This invocation of SignalEvent() function informs the caller that invoked + EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() that either all the APs completed + the specified task or a timeout occurred. The contents of FailedCpuList + can be examined to determine which APs did not complete the specified task + prior to the timeout. + + @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL + instance. + @param[in] Procedure A pointer to the function to be run on + enabled APs of the system. See type + EFI_AP_PROCEDURE. + @param[in] SingleThread If TRUE, then all the enabled APs execute + the function specified by Procedure one by + one, in ascending order of processor handle + number. If FALSE, then all the enabled APs + execute the function specified by Procedure + simultaneously. + @param[in] WaitEvent The event created by the caller with CreateEvent() + service. If it is NULL, then execute in + blocking mode. BSP waits until all APs finish + or TimeoutInMicroSeconds expires. If it's + not NULL, then execute in non-blocking mode. + BSP requests the function specified by + Procedure to be started on all the enabled + APs, and go on executing immediately. If + all return from Procedure, or TimeoutInMicroSeconds + expires, this event is signaled. The BSP + can use the CheckEvent() or WaitForEvent() + services to check the state of event. Type + EFI_EVENT is defined in CreateEvent() in + the Unified Extensible Firmware Interface + Specification. + @param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for + APs to return from Procedure, either for + blocking or non-blocking mode. Zero means + infinity. If the timeout expires before + all APs return from Procedure, then Procedure + on the failed APs is terminated. All enabled + APs are available for next function assigned + by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() + or EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). + If the timeout expires in blocking mode, + BSP returns EFI_TIMEOUT. If the timeout + expires in non-blocking mode, WaitEvent + is signaled with SignalEvent(). + @param[in] ProcedureArgument The parameter passed into Procedure for + all APs. + @param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise, + if all APs finish successfully, then its + content is set to NULL. If not all APs + finish before timeout expires, then its + content is set to address of the buffer + holding handle numbers of the failed APs. + The buffer is allocated by MP Service Protocol, + and it's the caller's responsibility to + free the buffer with FreePool() service. + In blocking mode, it is ready for consumption + when the call returns. In non-blocking mode, + it is ready when WaitEvent is signaled. The + list of failed CPU is terminated by + END_OF_CPU_LIST. + + @retval EFI_SUCCESS In blocking mode, all APs have finished before + the timeout expired. + @retval EFI_SUCCESS In non-blocking mode, function has been dispatched + to all enabled APs. + @retval EFI_UNSUPPORTED A non-blocking mode request was made after the + UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was + signaled. + @retval EFI_DEVICE_ERROR Caller processor is AP. + @retval EFI_NOT_STARTED No enabled APs exist in the system. + @retval EFI_NOT_READY Any enabled APs are busy. + @retval EFI_TIMEOUT In blocking mode, the timeout expired before + all enabled APs have finished. + @retval EFI_INVALID_PARAMETER Procedure is NULL. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MP_SERVICES_STARTUP_ALL_APS)( + IN EFI_MP_SERVICES_PROTOCOL *This, + IN EFI_AP_PROCEDURE Procedure, + IN BOOLEAN SingleThread, + IN EFI_EVENT WaitEvent OPTIONAL, + IN UINTN TimeoutInMicroSeconds, + IN VOID *ProcedureArgument OPTIONAL, + OUT UINTN **FailedCpuList OPTIONAL + ); + +/** + This service lets the caller get one enabled AP to execute a caller-provided + function. The caller can request the BSP to either wait for the completion + of the AP or just proceed with the next task by using the EFI event mechanism. + See EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() for more details on non-blocking + execution support. This service may only be called from the BSP. + + This function is used to dispatch one enabled AP to the function specified by + Procedure passing in the argument specified by ProcedureArgument. If WaitEvent + is NULL, execution is in blocking mode. The BSP waits until the AP finishes or + TimeoutInMicroSecondss expires. Otherwise, execution is in non-blocking mode. + BSP proceeds to the next task without waiting for the AP. If a non-blocking mode + is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled, + then EFI_UNSUPPORTED must be returned. + + If the timeout specified by TimeoutInMicroseconds expires before the AP returns + from Procedure, then execution of Procedure by the AP is terminated. The AP is + available for subsequent calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() and + EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). + + @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL + instance. + @param[in] Procedure A pointer to the function to be run on the + designated AP of the system. See type + EFI_AP_PROCEDURE. + @param[in] ProcessorNumber The handle number of the AP. The range is + from 0 to the total number of logical + processors minus 1. The total number of + logical processors can be retrieved by + EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). + @param[in] WaitEvent The event created by the caller with CreateEvent() + service. If it is NULL, then execute in + blocking mode. BSP waits until this AP finish + or TimeoutInMicroSeconds expires. If it's + not NULL, then execute in non-blocking mode. + BSP requests the function specified by + Procedure to be started on this AP, + and go on executing immediately. If this AP + return from Procedure or TimeoutInMicroSeconds + expires, this event is signaled. The BSP + can use the CheckEvent() or WaitForEvent() + services to check the state of event. Type + EFI_EVENT is defined in CreateEvent() in + the Unified Extensible Firmware Interface + Specification. + @param[in] TimeoutInMicrosecsond Indicates the time limit in microseconds for + this AP to finish this Procedure, either for + blocking or non-blocking mode. Zero means + infinity. If the timeout expires before + this AP returns from Procedure, then Procedure + on the AP is terminated. The + AP is available for next function assigned + by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() + or EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). + If the timeout expires in blocking mode, + BSP returns EFI_TIMEOUT. If the timeout + expires in non-blocking mode, WaitEvent + is signaled with SignalEvent(). + @param[in] ProcedureArgument The parameter passed into Procedure on the + specified AP. + @param[out] Finished If NULL, this parameter is ignored. In + blocking mode, this parameter is ignored. + In non-blocking mode, if AP returns from + Procedure before the timeout expires, its + content is set to TRUE. Otherwise, the + value is set to FALSE. The caller can + determine if the AP returned from Procedure + by evaluating this value. + + @retval EFI_SUCCESS In blocking mode, specified AP finished before + the timeout expires. + @retval EFI_SUCCESS In non-blocking mode, the function has been + dispatched to specified AP. + @retval EFI_UNSUPPORTED A non-blocking mode request was made after the + UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was + signaled. + @retval EFI_DEVICE_ERROR The calling processor is an AP. + @retval EFI_TIMEOUT In blocking mode, the timeout expired before + the specified AP has finished. + @retval EFI_NOT_READY The specified AP is busy. + @retval EFI_NOT_FOUND The processor with the handle specified by + ProcessorNumber does not exist. + @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP. + @retval EFI_INVALID_PARAMETER Procedure is NULL. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MP_SERVICES_STARTUP_THIS_AP)( + IN EFI_MP_SERVICES_PROTOCOL *This, + IN EFI_AP_PROCEDURE Procedure, + IN UINTN ProcessorNumber, + IN EFI_EVENT WaitEvent OPTIONAL, + IN UINTN TimeoutInMicroseconds, + IN VOID *ProcedureArgument OPTIONAL, + OUT BOOLEAN *Finished OPTIONAL + ); + +/** + This service switches the requested AP to be the BSP from that point onward. + This service changes the BSP for all purposes. This call can only be performed + by the current BSP. + + This service switches the requested AP to be the BSP from that point onward. + This service changes the BSP for all purposes. The new BSP can take over the + execution of the old BSP and continue seamlessly from where the old one left + off. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT + is signaled. + + If the BSP cannot be switched prior to the return from this service, then + EFI_UNSUPPORTED must be returned. + + @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance. + @param[in] ProcessorNumber The handle number of AP that is to become the new + BSP. The range is from 0 to the total number of + logical processors minus 1. The total number of + logical processors can be retrieved by + EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). + @param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an + enabled AP. Otherwise, it will be disabled. + + @retval EFI_SUCCESS BSP successfully switched. + @retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to + this service returning. + @retval EFI_UNSUPPORTED Switching the BSP is not supported. + @retval EFI_DEVICE_ERROR The calling processor is an AP. + @retval EFI_NOT_FOUND The processor with the handle specified by + ProcessorNumber does not exist. + @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or + a disabled AP. + @retval EFI_NOT_READY The specified AP is busy. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MP_SERVICES_SWITCH_BSP)( + IN EFI_MP_SERVICES_PROTOCOL *This, + IN UINTN ProcessorNumber, + IN BOOLEAN EnableOldBSP + ); + +/** + This service lets the caller enable or disable an AP from this point onward. + This service may only be called from the BSP. + + This service allows the caller enable or disable an AP from this point onward. + The caller can optionally specify the health status of the AP by Health. If + an AP is being disabled, then the state of the disabled AP is implementation + dependent. If an AP is enabled, then the implementation must guarantee that a + complete initialization sequence is performed on the AP, so the AP is in a state + that is compatible with an MP operating system. This service may not be supported + after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled. + + If the enable or disable AP operation cannot be completed prior to the return + from this service, then EFI_UNSUPPORTED must be returned. + + @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance. + @param[in] ProcessorNumber The handle number of AP. + The range is from 0 to the total number of + logical processors minus 1. The total number of + logical processors can be retrieved by + EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). + @param[in] EnableAP Specifies the new state for the processor for + enabled, FALSE for disabled. + @param[in] HealthFlag If not NULL, a pointer to a value that specifies + the new health status of the AP. This flag + corresponds to StatusFlag defined in + EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only + the PROCESSOR_HEALTH_STATUS_BIT is used. All other + bits are ignored. If it is NULL, this parameter + is ignored. + + @retval EFI_SUCCESS The specified AP was enabled or disabled successfully. + @retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed + prior to this service returning. + @retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported. + @retval EFI_DEVICE_ERROR The calling processor is an AP. + @retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber + does not exist. + @retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MP_SERVICES_ENABLEDISABLEAP)( + IN EFI_MP_SERVICES_PROTOCOL *This, + IN UINTN ProcessorNumber, + IN BOOLEAN EnableAP, + IN UINT32 *HealthFlag OPTIONAL + ); + +/** + This return the handle number for the calling processor. This service may be + called from the BSP and APs. + + This service returns the processor handle number for the calling processor. + The returned value is in the range from 0 to the total number of logical + processors minus 1. The total number of logical processors can be retrieved + with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be + called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER + is returned. Otherwise, the current processors handle number is returned in + ProcessorNumber, and EFI_SUCCESS is returned. + + @param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance. + @param[in] ProcessorNumber Pointer to the handle number of AP. + The range is from 0 to the total number of + logical processors minus 1. The total number of + logical processors can be retrieved by + EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). + + @retval EFI_SUCCESS The current processor handle number was returned + in ProcessorNumber. + @retval EFI_INVALID_PARAMETER ProcessorNumber is NULL. + +**/ +typedef +EFI_STATUS +(EFIAPI *EFI_MP_SERVICES_WHOAMI)( + IN EFI_MP_SERVICES_PROTOCOL *This, + OUT UINTN *ProcessorNumber + ); + +/// +/// When installed, the MP Services Protocol produces a collection of services +/// that are needed for MP management. +/// +/// Before the UEFI event EFI_EVENT_GROUP_READY_TO_BOOT is signaled, the module +/// that produces this protocol is required to place all APs into an idle state +/// whenever the APs are disabled or the APs are not executing code as requested +/// through the StartupAllAPs() or StartupThisAP() services. The idle state of +/// an AP before the UEFI event EFI_EVENT_GROUP_READY_TO_BOOT is signaled is +/// implementation dependent. +/// +/// After the UEFI event EFI_EVENT_GROUP_READY_TO_BOOT is signaled, all the APs +/// must be placed in the OS compatible CPU state as defined by the UEFI +/// Specification. Implementations of this protocol may use the UEFI event +/// EFI_EVENT_GROUP_READY_TO_BOOT to force APs into the OS compatible state as +/// defined by the UEFI Specification. Modules that use this protocol must +/// guarantee that all non-blocking mode requests on all APs have been completed +/// before the UEFI event EFI_EVENT_GROUP_READY_TO_BOOT is signaled. Since the +/// order that event notification functions in the same event group are executed +/// is not deterministic, an event of type EFI_EVENT_GROUP_READY_TO_BOOT cannot +/// be used to guarantee that APs have completed their non-blocking mode requests. +/// +/// When the UEFI event EFI_EVENT_GROUP_READY_TO_BOOT is signaled, the StartAllAPs() +/// and StartupThisAp() services must no longer support non-blocking mode requests. +/// The support for SwitchBSP() and EnableDisableAP() may no longer be supported +/// after this event is signaled. Since UEFI Applications and UEFI OS Loaders +/// execute after the UEFI event EFI_EVENT_GROUP_READY_TO_BOOT is signaled, these +/// UEFI images must be aware that the functionality of this protocol may be reduced. +/// +struct _EFI_MP_SERVICES_PROTOCOL { + EFI_MP_SERVICES_GET_NUMBER_OF_PROCESSORS GetNumberOfProcessors; + EFI_MP_SERVICES_GET_PROCESSOR_INFO GetProcessorInfo; + EFI_MP_SERVICES_STARTUP_ALL_APS StartupAllAPs; + EFI_MP_SERVICES_STARTUP_THIS_AP StartupThisAP; + EFI_MP_SERVICES_SWITCH_BSP SwitchBSP; + EFI_MP_SERVICES_ENABLEDISABLEAP EnableDisableAP; + EFI_MP_SERVICES_WHOAMI WhoAmI; +}; + +extern EFI_GUID gEfiMpServiceProtocolGuid; + +#endif diff --git a/src/include/ipxe/efi/efi_mp.h b/src/include/ipxe/efi/efi_mp.h new file mode 100644 index 00000000..8dc4243e --- /dev/null +++ b/src/include/ipxe/efi/efi_mp.h @@ -0,0 +1,30 @@ +#ifndef _IPXE_EFI_MP_H +#define _IPXE_EFI_MP_H + +/** @file + * + * EFI multiprocessor API implementation + * + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +#ifdef MPAPI_EFI +#define MPAPI_PREFIX_efi +#else +#define MPAPI_PREFIX_efi __efi_ +#endif + +/** + * Calculate address as seen by a multiprocessor function + * + * @v address Address in boot processor address space + * @ret address Address in application processor address space + */ +static inline __attribute__ (( always_inline )) mp_addr_t +MPAPI_INLINE ( efi, mp_address ) ( void *address ) { + + return ( ( mp_addr_t ) address ); +} + +#endif /* _IPXE_EFI_MP_H */ diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index 1fe34113..c673b9a4 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -81,6 +81,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #define ERRFILE_efi_strings ( ERRFILE_CORE | 0x00290000 ) #define ERRFILE_uuid ( ERRFILE_CORE | 0x002a0000 ) #define ERRFILE_efi_path ( ERRFILE_CORE | 0x002b0000 ) +#define ERRFILE_efi_mp ( ERRFILE_CORE | 0x002c0000 ) #define ERRFILE_eisa ( ERRFILE_DRIVER | 0x00000000 ) #define ERRFILE_isa ( ERRFILE_DRIVER | 0x00010000 ) diff --git a/src/include/ipxe/mp.h b/src/include/ipxe/mp.h index a3657490..9670dea5 100644 --- a/src/include/ipxe/mp.h +++ b/src/include/ipxe/mp.h @@ -102,6 +102,7 @@ extern void __asmcall mp_call ( mp_addr_t func, mp_addr_t opaque ); /* Include all architecture-independent multiprocessor API headers */ #include +#include /* Include all architecture-dependent multiprocessor API headers */ #include diff --git a/src/interface/efi/efi_mp.c b/src/interface/efi/efi_mp.c new file mode 100644 index 00000000..fdbbc9ae --- /dev/null +++ b/src/interface/efi/efi_mp.c @@ -0,0 +1,112 @@ +/* + * Copyright (C) 2024 Michael Brown . + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + * + * You can also choose to distribute this program under the terms of + * the Unmodified Binary Distribution Licence (as given in the file + * COPYING.UBDL), provided that you have satisfied its requirements. + */ + +FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); + +/** @file + * + * EFI multiprocessor API implementation + * + */ + +#include +#include +#include +#include +#include + +/** EFI multiprocessor function call data */ +struct efi_mp_func_data { + /** Multiprocessor function */ + mp_addr_t func; + /** Opaque data pointer */ + mp_addr_t opaque; +}; + +/** Multiprocessor services protocol */ +static EFI_MP_SERVICES_PROTOCOL *efimp; +EFI_REQUEST_PROTOCOL ( EFI_MP_SERVICES_PROTOCOL, &efimp ); + +/** + * Call multiprocessor function on current CPU + * + * @v buffer Multiprocessor function call data + */ +static EFIAPI VOID efi_mp_call ( VOID *buffer ) { + struct efi_mp_func_data *data = buffer; + + /* Call multiprocessor function */ + mp_call ( data->func, data->opaque ); +} + +/** + * Execute a multiprocessor function on the boot processor + * + * @v func Multiprocessor function + * @v opaque Opaque data pointer + */ +static void efi_mp_exec_boot ( mp_func_t func, void *opaque ) { + struct efi_mp_func_data data; + + /* Construct call data */ + data.func = mp_address ( func ); + data.opaque = mp_address ( opaque ); + + /* Call multiprocesor function */ + efi_mp_call ( &data ); +} + +/** + * Start a multiprocessor function on all application processors + * + * @v func Multiprocessor function + * @v opaque Opaque data pointer + */ +static void efi_mp_start_all ( mp_func_t func, void *opaque ) { + struct efi_mp_func_data data; + EFI_STATUS efirc; + int rc; + + /* Do nothing if MP services is not present */ + if ( ! efimp ) { + DBGC ( func, "EFIMP has no multiprocessor services\n" ); + return; + } + + /* Construct call data */ + data.func = mp_address ( func ); + data.opaque = mp_address ( opaque ); + + /* Start up all application processors */ + if ( ( efirc = efimp->StartupAllAPs ( efimp, efi_mp_call, FALSE, NULL, + 0, &data, NULL ) ) != 0 ) { + rc = -EEFI ( efirc ); + DBGC ( func, "EFIMP could not start APs: %s\n", + strerror ( rc ) ); + return; + } +} + +PROVIDE_MPAPI_INLINE ( efi, mp_address ); +PROVIDE_MPAPI ( efi, mp_exec_boot, efi_mp_exec_boot ); +PROVIDE_MPAPI ( efi, mp_start_all, efi_mp_start_all ); -- cgit v1.2.3-55-g7522