mirror of https://github.com/acidanthera/audk.git
323 lines
12 KiB
C
323 lines
12 KiB
C
/** @file
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Features in MSR_IA32_FEATURE_CONTROL register.
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Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "CpuCommonFeatures.h"
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/**
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Prepares for the data used by CPU feature detection and initialization.
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@param[in] NumberOfProcessors The number of CPUs in the platform.
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@return Pointer to a buffer of CPU related configuration data.
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@note This service could be called by BSP only.
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**/
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VOID *
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EFIAPI
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FeatureControlGetConfigData (
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IN UINTN NumberOfProcessors
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)
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{
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VOID *ConfigData;
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ConfigData = AllocateZeroPool (sizeof (MSR_IA32_FEATURE_CONTROL_REGISTER) * NumberOfProcessors);
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ASSERT (ConfigData != NULL);
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return ConfigData;
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}
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/**
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Detects if VMX 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 VMX feature is supported.
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@retval FALSE VMX 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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VmxSupport (
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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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MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister;
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ASSERT (ConfigData != NULL);
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MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData;
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MsrRegister[ProcessorNumber].Uint64 = AsmReadMsr64 (MSR_IA32_FEATURE_CONTROL);
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return (CpuInfo->CpuIdVersionInfoEcx.Bits.VMX == 1);
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}
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/**
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Initializes VMX 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 VMX feature must be enabled.
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If FALSE, then the VMX feature must be disabled.
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@retval RETURN_SUCCESS VMX 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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VmxInitialize (
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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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MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister;
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//
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// The scope of EnableVmxOutsideSmx bit in the MSR_IA32_FEATURE_CONTROL is core for
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// below processor type, only program MSR_IA32_FEATURE_CONTROL for thread 0 in each
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// core.
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//
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if (IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
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IS_GOLDMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
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IS_GOLDMONT_PLUS_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {
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if (CpuInfo->ProcessorInfo.Location.Thread != 0) {
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return RETURN_SUCCESS;
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}
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}
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ASSERT (ConfigData != NULL);
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MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData;
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if (MsrRegister[ProcessorNumber].Bits.Lock == 0) {
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CPU_REGISTER_TABLE_WRITE_FIELD (
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ProcessorNumber,
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Msr,
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MSR_IA32_FEATURE_CONTROL,
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MSR_IA32_FEATURE_CONTROL_REGISTER,
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Bits.EnableVmxOutsideSmx,
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(State) ? 1 : 0
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);
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}
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return RETURN_SUCCESS;
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}
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/**
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Detects if Lock Feature Control Register 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 Lock Feature Control Register feature is supported.
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@retval FALSE Lock Feature Control Register 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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LockFeatureControlRegisterSupport (
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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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MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister;
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ASSERT (ConfigData != NULL);
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MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData;
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MsrRegister[ProcessorNumber].Uint64 = AsmReadMsr64 (MSR_IA32_FEATURE_CONTROL);
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return TRUE;
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}
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/**
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Initializes Lock Feature Control Register 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 Lock Feature Control Register feature must be enabled.
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If FALSE, then the Lock Feature Control Register feature must be disabled.
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@retval RETURN_SUCCESS Lock Feature Control Register 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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LockFeatureControlRegisterInitialize (
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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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MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister;
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//
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// The scope of Lock bit in the MSR_IA32_FEATURE_CONTROL is core for
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// below processor type, only program MSR_IA32_FEATURE_CONTROL for thread 0 in each
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// core.
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//
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if (IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
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IS_GOLDMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
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IS_GOLDMONT_PLUS_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {
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if (CpuInfo->ProcessorInfo.Location.Thread != 0) {
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return RETURN_SUCCESS;
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}
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}
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ASSERT (ConfigData != NULL);
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MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData;
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if (MsrRegister[ProcessorNumber].Bits.Lock == 0) {
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CPU_REGISTER_TABLE_WRITE_FIELD (
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ProcessorNumber,
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Msr,
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MSR_IA32_FEATURE_CONTROL,
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MSR_IA32_FEATURE_CONTROL_REGISTER,
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Bits.Lock,
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1
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);
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}
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return RETURN_SUCCESS;
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}
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/**
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Detects if SMX 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 SMX feature is supported.
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@retval FALSE SMX 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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SmxSupport (
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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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MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister;
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ASSERT (ConfigData != NULL);
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MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData;
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MsrRegister[ProcessorNumber].Uint64 = AsmReadMsr64 (MSR_IA32_FEATURE_CONTROL);
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return (CpuInfo->CpuIdVersionInfoEcx.Bits.SMX == 1);
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}
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/**
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Initializes SMX 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 SMX feature must be enabled.
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If FALSE, then SMX feature must be disabled.
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@retval RETURN_SUCCESS SMX feature is initialized.
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@retval RETURN_UNSUPPORTED VMX not 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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SmxInitialize (
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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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MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister;
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RETURN_STATUS Status;
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//
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// The scope of Lock bit in the MSR_IA32_FEATURE_CONTROL is core for
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// below processor type, only program MSR_IA32_FEATURE_CONTROL for thread 0 in each
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// core.
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//
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if (IS_GOLDMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) ||
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IS_GOLDMONT_PLUS_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) {
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if (CpuInfo->ProcessorInfo.Location.Thread != 0) {
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return RETURN_SUCCESS;
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}
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}
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Status = RETURN_SUCCESS;
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if (State && (!IsCpuFeatureInSetting (CPU_FEATURE_VMX))) {
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DEBUG ((DEBUG_WARN, "Warning :: Can't enable SMX feature when VMX feature not enabled, disable it.\n"));
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State = FALSE;
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Status = RETURN_UNSUPPORTED;
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}
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ASSERT (ConfigData != NULL);
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MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData;
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if (MsrRegister[ProcessorNumber].Bits.Lock == 0) {
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CPU_REGISTER_TABLE_WRITE_FIELD (
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ProcessorNumber,
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Msr,
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MSR_IA32_FEATURE_CONTROL,
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MSR_IA32_FEATURE_CONTROL_REGISTER,
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Bits.SenterLocalFunctionEnables,
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(State) ? 0x7F : 0
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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_IA32_FEATURE_CONTROL,
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MSR_IA32_FEATURE_CONTROL_REGISTER,
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Bits.SenterGlobalEnable,
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(State) ? 1 : 0
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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_IA32_FEATURE_CONTROL,
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MSR_IA32_FEATURE_CONTROL_REGISTER,
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Bits.EnableVmxInsideSmx,
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(State) ? 1 : 0
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);
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}
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return Status;
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}
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