bf5a306ab5
In current implementation, CPU initialized can be done in PEI or DXE phase. PEI uses CpuFeaturesPei and Dxe uses CpuFeaturesDxe. If CPU initialized in PEI phase, CpuFeaturesDxe driver will not be used. This driver will install gEdkiiCpuFeaturesInitDoneGuid protocol after it initializes the CPU. Some drivers depend on this protocol to dispatch themselves. If CpuFeaturesDxe not been used, these drivers will not be dispatched. This patch fix the above issue. If Cpu initialized in PEI phase, it also report a guid HOB for CpuFeaturesDxe. CpuFeaturesDxe will check this HOB first. If it found this HOB, it just install gEdkiiCpuFeaturesInitDoneGuid protocol, else it will also do the CPU initialization. Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Eric Dong <eric.dong@intel.com> Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
/** @file
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CPU Features DXE driver to initialize CPU features.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <PiDxe.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/RegisterCpuFeaturesLib.h>
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#include <Library/HobLib.h>
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#include <Protocol/SmmConfiguration.h>
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#include <Guid/CpuFeaturesInitDone.h>
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/**
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Worker function to perform CPU feature initialization.
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**/
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VOID
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CpuFeaturesInitializeWorker (
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VOID
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)
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{
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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CpuFeaturesDetect ();
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CpuFeaturesInitialize ();
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//
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// Install CPU Features Init Done Protocol
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//
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Handle = NULL;
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Status = gBS->InstallProtocolInterface (
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&Handle,
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&gEdkiiCpuFeaturesInitDoneGuid,
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EFI_NATIVE_INTERFACE,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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}
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/**
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Event notification that initialize CPU features when gEfiSmmConfigurationProtocol installs.
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@param[in] Event The Event that is being processed, not used.
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@param[in] Context Event Context, not used.
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**/
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VOID
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EFIAPI
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SmmConfigurationEventNotify (
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IN EFI_EVENT Event,
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IN VOID *Context
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)
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{
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EFI_STATUS Status;
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EFI_SMM_CONFIGURATION_PROTOCOL *SmmConfiguration;
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//
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// Make sure this notification is for this handler
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//
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Status = gBS->LocateProtocol (&gEfiSmmConfigurationProtocolGuid, NULL, (VOID **)&SmmConfiguration);
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if (EFI_ERROR (Status)) {
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return;
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}
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CpuFeaturesInitializeWorker ();
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}
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/**
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CPU Features driver entry point function.
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If PcdCpuFeaturesInitAfterSmmRelocation is TRUE, it will register one
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SMM Configuration Protocol notify function to perform CPU features
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initialization. Otherwise, it will perform CPU features initialization
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directly.
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@param ImageHandle Image handle this driver.
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@param SystemTable Pointer to the System Table.
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@retval EFI_SUCCESS CPU Features is initialized successfully.
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**/
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EFI_STATUS
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EFIAPI
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CpuFeaturesDxeInitialize (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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VOID *Registration;
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EFI_STATUS Status;
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EFI_HANDLE Handle;
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if (GetFirstGuidHob (&gEdkiiCpuFeaturesInitDoneGuid) != NULL) {
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//
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// Try to find HOB first. This HOB exist means CPU features have
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// been initialized by CpuFeaturesPei driver, just install
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// gEdkiiCpuFeaturesInitDoneGuid.
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//
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Handle = NULL;
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Status = gBS->InstallProtocolInterface (
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&Handle,
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&gEdkiiCpuFeaturesInitDoneGuid,
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EFI_NATIVE_INTERFACE,
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NULL
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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if (PcdGetBool (PcdCpuFeaturesInitAfterSmmRelocation)) {
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//
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// Install notification callback on SMM Configuration Protocol
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//
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EfiCreateProtocolNotifyEvent (
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&gEfiSmmConfigurationProtocolGuid,
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TPL_CALLBACK,
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SmmConfigurationEventNotify,
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NULL,
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&Registration
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);
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} else {
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CpuFeaturesInitializeWorker ();
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}
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return EFI_SUCCESS;
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}
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