/** @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_ |