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/** @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_
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