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