| /** @file | |
| Definition for the CPU_HOT_EJECT_DATA structure, which shares | |
| CPU hot-eject state between OVMF's SmmCpuFeaturesLib instance in | |
| PiSmmCpuDxeSmm, and CpuHotplugSmm. | |
| CPU_HOT_EJECT_DATA is allocated in SMRAM, and pointed-to by | |
| PcdCpuHotEjectDataAddress. | |
| PcdCpuHotEjectDataAddress is valid when SMM_REQUIRE is TRUE | |
| and PcdCpuMaxLogicalProcessorNumber > 1. | |
| Copyright (C) 2021, Oracle Corporation. | |
| SPDX-License-Identifier: BSD-2-Clause-Patent | |
| **/ | |
| #ifndef CPU_HOT_EJECT_DATA_H_ | |
| #define CPU_HOT_EJECT_DATA_H_ | |
| /** | |
| CPU Hot-eject handler, called from SmmCpuFeaturesRendezvousExit() | |
| on each CPU at exit from SMM. | |
| @param[in] ProcessorNum ProcessorNum denotes the CPU exiting SMM, | |
| and will be used as an index into | |
| CPU_HOT_EJECT_DATA->QemuSelectorMap. It is | |
| identical to the processor handle in | |
| EFI_SMM_CPU_SERVICE_PROTOCOL. | |
| **/ | |
| typedef | |
| VOID | |
| (EFIAPI *CPU_HOT_EJECT_HANDLER)( | |
| IN UINTN ProcessorNum | |
| ); | |
| // | |
| // CPU_EJECT_QEMU_SELECTOR_INVALID marks CPUs not being ejected in | |
| // CPU_HOT_EJECT_DATA->QemuSelectorMap. | |
| // | |
| // QEMU CPU Selector is UINT32, so we choose an invalid value larger | |
| // than that type. | |
| // | |
| #define CPU_EJECT_QEMU_SELECTOR_INVALID (MAX_UINT64) | |
| typedef struct { | |
| // | |
| // Maps ProcessorNum -> QemuSelector for pending hot-ejects | |
| // | |
| volatile UINT64 *QemuSelectorMap; | |
| // | |
| // Handler to do the CPU ejection | |
| // | |
| volatile CPU_HOT_EJECT_HANDLER Handler; | |
| // | |
| // Entries in the QemuSelectorMap | |
| // | |
| UINT32 ArrayLength; | |
| } CPU_HOT_EJECT_DATA; | |
| #endif // CPU_HOT_EJECT_DATA_H_ |