From 8ade9d425a6e6b4c992bea6c3b5e65c32b6cd463 Mon Sep 17 00:00:00 2001 From: Ankur Arora Date: Thu, 11 Mar 2021 22:26:51 -0800 Subject: OvmfPkg: define CPU_HOT_EJECT_DATA Define CPU_HOT_EJECT_DATA and add PCD PcdCpuHotEjectDataAddress, which will be used to share CPU ejection state between OvmfPkg/CpuHotPlugSmm and PiSmmCpuDxeSmm. Cc: Laszlo Ersek Cc: Jordan Justen Cc: Ard Biesheuvel Cc: Igor Mammedov Cc: Boris Ostrovsky Cc: Aaron Young Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3132 Signed-off-by: Ankur Arora Message-Id: <20210312062656.2477515-6-ankur.a.arora@oracle.com> Reviewed-by: Laszlo Ersek --- OvmfPkg/Include/Pcd/CpuHotEjectData.h | 60 +++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 OvmfPkg/Include/Pcd/CpuHotEjectData.h (limited to 'OvmfPkg/Include') diff --git a/OvmfPkg/Include/Pcd/CpuHotEjectData.h b/OvmfPkg/Include/Pcd/CpuHotEjectData.h new file mode 100644 index 0000000000..0671437552 --- /dev/null +++ b/OvmfPkg/Include/Pcd/CpuHotEjectData.h @@ -0,0 +1,60 @@ +/** @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_ -- cgit v1.2.3