17efae27ac
Add a new SMM driver skeleton that registers a root SMI handler, and checks if the SMI control value (written to 0xB2) indicates a CPU hotplug SMI. QEMU's ACPI payload will cause the OS to raise a broadcast SMI when a CPU hotplug event occurs, namely by writing value 4 to IO Port 0xB2. In other words, control value 4 is now allocated for this purpose; introduce the ICH9_APM_CNT_CPU_HOTPLUG macro for it. The standard identifiers in this driver use the new MM (Management Mode) terminology from the PI spec, not the earlier SMM (System Management Mode) terms. Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Igor Mammedov <imammedo@redhat.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Michael Kinney <michael.d.kinney@intel.com> Cc: Philippe Mathieu-Daudé <philmd@redhat.com> Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1512 Signed-off-by: Laszlo Ersek <lersek@redhat.com> Message-Id: <20200226221156.29589-7-lersek@redhat.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
49 lines
1.1 KiB
INI
49 lines
1.1 KiB
INI
## @file
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# Root SMI handler for VCPU hotplug SMIs.
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#
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# Copyright (c) 2020, Red Hat, Inc.
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#
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# SPDX-License-Identifier: BSD-2-Clause-Patent
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##
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[Defines]
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INF_VERSION = 1.29
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PI_SPECIFICATION_VERSION = 0x00010046 # PI-1.7.0
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BASE_NAME = CpuHotplugSmm
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FILE_GUID = 84EEA114-C6BE-4445-8F90-51D97863E363
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MODULE_TYPE = DXE_SMM_DRIVER
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ENTRY_POINT = CpuHotplugEntry
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#
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# The following information is for reference only and not required by the build
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# tools.
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#
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# VALID_ARCHITECTURES = IA32 X64
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#
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[Sources]
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CpuHotplug.c
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[Packages]
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MdePkg/MdePkg.dec
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OvmfPkg/OvmfPkg.dec
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[LibraryClasses]
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BaseLib
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DebugLib
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MmServicesTableLib
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PcdLib
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UefiDriverEntryPoint
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[Protocols]
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gEfiMmCpuIoProtocolGuid ## CONSUMES
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[Pcd]
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gUefiOvmfPkgTokenSpaceGuid.PcdQ35SmramAtDefaultSmbase ## CONSUMES
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[FeaturePcd]
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gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire ## CONSUMES
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[Depex]
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gEfiMmCpuIoProtocolGuid
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