d28daaddb3
Because MSR has scope attribute, driver has no needs to set MSR for all APs if MSR scope is core or package type. This patch updates code to base on the MSR scope value to add MSR to the register table. 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>
88 lines
3.2 KiB
C
88 lines
3.2 KiB
C
/** @file
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C1E feature.
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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 "CpuCommonFeatures.h"
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/**
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Detects if C1E feature supported on current processor.
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@param[in] ProcessorNumber The index of the CPU executing this function.
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@param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION
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structure for the CPU executing this function.
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@param[in] ConfigData A pointer to the configuration buffer returned
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by CPU_FEATURE_GET_CONFIG_DATA. NULL if
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CPU_FEATURE_GET_CONFIG_DATA was not provided in
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RegisterCpuFeature().
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@retval TRUE C1E feature is supported.
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@retval FALSE C1E feature is not supported.
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@note This service could be called by BSP/APs.
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**/
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BOOLEAN
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EFIAPI
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C1eSupport (
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IN UINTN ProcessorNumber,
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IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
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IN VOID *ConfigData OPTIONAL
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)
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{
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return IS_NEHALEM_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel);
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}
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/**
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Initializes C1E feature to specific state.
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@param[in] ProcessorNumber The index of the CPU executing this function.
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@param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION
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structure for the CPU executing this function.
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@param[in] ConfigData A pointer to the configuration buffer returned
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by CPU_FEATURE_GET_CONFIG_DATA. NULL if
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CPU_FEATURE_GET_CONFIG_DATA was not provided in
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RegisterCpuFeature().
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@param[in] State If TRUE, then the C1E feature must be enabled.
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If FALSE, then the C1E feature must be disabled.
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@retval RETURN_SUCCESS C1E feature is initialized.
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@note This service could be called by BSP only.
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**/
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RETURN_STATUS
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EFIAPI
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C1eInitialize (
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IN UINTN ProcessorNumber,
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IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
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IN VOID *ConfigData, OPTIONAL
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IN BOOLEAN State
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)
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{
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//
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// The scope of C1EEnable bit in the MSR_NEHALEM_POWER_CTL is Package, only program
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// MSR_FEATURE_CONFIG for thread 0 core 0 in each package.
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//
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if ((CpuInfo->ProcessorInfo.Location.Thread != 0) || (CpuInfo->ProcessorInfo.Location.Core != 0)) {
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return RETURN_SUCCESS;
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}
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CPU_REGISTER_TABLE_WRITE_FIELD (
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ProcessorNumber,
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Msr,
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MSR_NEHALEM_POWER_CTL,
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MSR_NEHALEM_POWER_CTL_REGISTER,
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Bits.C1EEnable,
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(State) ? 1 : 0
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);
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return RETURN_SUCCESS;
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}
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