diff options
Diffstat (limited to 'src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c')
| -rw-r--r-- | src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c new file mode 100644 index 00000000..1735fe7d --- /dev/null +++ b/src/VBox/Devices/EFI/Firmware/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c @@ -0,0 +1,280 @@ +/** @file + Features in MSR_IA32_FEATURE_CONTROL register. + + Copyright (c) 2017 - 2019, Intel Corporation. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include "CpuCommonFeatures.h" + +/** + Detects if VMX feature supported on current processor. + + @param[in] ProcessorNumber The index of the CPU executing this function. + @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION + structure for the CPU executing this function. + @param[in] ConfigData A pointer to the configuration buffer returned + by CPU_FEATURE_GET_CONFIG_DATA. NULL if + CPU_FEATURE_GET_CONFIG_DATA was not provided in + RegisterCpuFeature(). + + @retval TRUE VMX feature is supported. + @retval FALSE VMX feature is not supported. + + @note This service could be called by BSP/APs. +**/ +BOOLEAN +EFIAPI +VmxSupport ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData OPTIONAL + ) +{ + return (CpuInfo->CpuIdVersionInfoEcx.Bits.VMX == 1); +} + +/** + Initializes VMX feature to specific state. + + @param[in] ProcessorNumber The index of the CPU executing this function. + @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION + structure for the CPU executing this function. + @param[in] ConfigData A pointer to the configuration buffer returned + by CPU_FEATURE_GET_CONFIG_DATA. NULL if + CPU_FEATURE_GET_CONFIG_DATA was not provided in + RegisterCpuFeature(). + @param[in] State If TRUE, then the VMX feature must be enabled. + If FALSE, then the VMX feature must be disabled. + + @retval RETURN_SUCCESS VMX feature is initialized. + + @note This service could be called by BSP only. +**/ +RETURN_STATUS +EFIAPI +VmxInitialize ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData, OPTIONAL + IN BOOLEAN State + ) +{ + // + // The scope of EnableVmxOutsideSmx bit in the MSR_IA32_FEATURE_CONTROL is core for + // below processor type, only program MSR_IA32_FEATURE_CONTROL for thread 0 in each + // core. + // + if (IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) || + IS_GOLDMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) || + IS_GOLDMONT_PLUS_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) { + if (CpuInfo->ProcessorInfo.Location.Thread != 0) { + return RETURN_SUCCESS; + } + } + + CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.EnableVmxOutsideSmx, + (State) ? 1 : 0 + ); + + return RETURN_SUCCESS; +} + +/** + Detects if Lock Feature Control Register feature supported on current processor. + + @param[in] ProcessorNumber The index of the CPU executing this function. + @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION + structure for the CPU executing this function. + @param[in] ConfigData A pointer to the configuration buffer returned + by CPU_FEATURE_GET_CONFIG_DATA. NULL if + CPU_FEATURE_GET_CONFIG_DATA was not provided in + RegisterCpuFeature(). + + @retval TRUE Lock Feature Control Register feature is supported. + @retval FALSE Lock Feature Control Register feature is not supported. + + @note This service could be called by BSP/APs. +**/ +BOOLEAN +EFIAPI +LockFeatureControlRegisterSupport ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData OPTIONAL + ) +{ + return TRUE; +} + +/** + Initializes Lock Feature Control Register feature to specific state. + + @param[in] ProcessorNumber The index of the CPU executing this function. + @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION + structure for the CPU executing this function. + @param[in] ConfigData A pointer to the configuration buffer returned + by CPU_FEATURE_GET_CONFIG_DATA. NULL if + CPU_FEATURE_GET_CONFIG_DATA was not provided in + RegisterCpuFeature(). + @param[in] State If TRUE, then the Lock Feature Control Register feature must be enabled. + If FALSE, then the Lock Feature Control Register feature must be disabled. + + @retval RETURN_SUCCESS Lock Feature Control Register feature is initialized. + + @note This service could be called by BSP only. +**/ +RETURN_STATUS +EFIAPI +LockFeatureControlRegisterInitialize ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData, OPTIONAL + IN BOOLEAN State + ) +{ + // + // The scope of Lock bit in the MSR_IA32_FEATURE_CONTROL is core for + // below processor type, only program MSR_IA32_FEATURE_CONTROL for thread 0 in each + // core. + // + if (IS_SILVERMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) || + IS_GOLDMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) || + IS_GOLDMONT_PLUS_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) { + if (CpuInfo->ProcessorInfo.Location.Thread != 0) { + return RETURN_SUCCESS; + } + } + + CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.Lock, + 1 + ); + + return RETURN_SUCCESS; +} + +/** + Detects if SMX feature supported on current processor. + + @param[in] ProcessorNumber The index of the CPU executing this function. + @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION + structure for the CPU executing this function. + @param[in] ConfigData A pointer to the configuration buffer returned + by CPU_FEATURE_GET_CONFIG_DATA. NULL if + CPU_FEATURE_GET_CONFIG_DATA was not provided in + RegisterCpuFeature(). + + @retval TRUE SMX feature is supported. + @retval FALSE SMX feature is not supported. + + @note This service could be called by BSP/APs. +**/ +BOOLEAN +EFIAPI +SmxSupport ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData OPTIONAL + ) +{ + return (CpuInfo->CpuIdVersionInfoEcx.Bits.SMX == 1); +} + +/** + Initializes SMX feature to specific state. + + @param[in] ProcessorNumber The index of the CPU executing this function. + @param[in] CpuInfo A pointer to the REGISTER_CPU_FEATURE_INFORMATION + structure for the CPU executing this function. + @param[in] ConfigData A pointer to the configuration buffer returned + by CPU_FEATURE_GET_CONFIG_DATA. NULL if + CPU_FEATURE_GET_CONFIG_DATA was not provided in + RegisterCpuFeature(). + @param[in] State If TRUE, then SMX feature must be enabled. + If FALSE, then SMX feature must be disabled. + + @retval RETURN_SUCCESS SMX feature is initialized. + @retval RETURN_UNSUPPORTED VMX not initialized. + + @note This service could be called by BSP only. +**/ +RETURN_STATUS +EFIAPI +SmxInitialize ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData, OPTIONAL + IN BOOLEAN State + ) +{ + RETURN_STATUS Status; + + // + // The scope of Lock bit in the MSR_IA32_FEATURE_CONTROL is core for + // below processor type, only program MSR_IA32_FEATURE_CONTROL for thread 0 in each + // core. + // + if (IS_GOLDMONT_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel) || + IS_GOLDMONT_PLUS_PROCESSOR (CpuInfo->DisplayFamily, CpuInfo->DisplayModel)) { + if (CpuInfo->ProcessorInfo.Location.Thread != 0) { + return RETURN_SUCCESS; + } + } + + Status = RETURN_SUCCESS; + + if (State && (!IsCpuFeatureInSetting (CPU_FEATURE_VMX))) { + DEBUG ((DEBUG_WARN, "Warning :: Can't enable SMX feature when VMX feature not enabled, disable it.\n")); + State = FALSE; + Status = RETURN_UNSUPPORTED; + } + + CPU_REGISTER_TABLE_WRITE_FIELD ( + ProcessorNumber, + ControlRegister, + 4, + IA32_CR4, + Bits.SMXE, + (State) ? 1 : 0 + ) + + CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.SenterLocalFunctionEnables, + (State) ? 0x7F : 0 + ); + + CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.SenterGlobalEnable, + (State) ? 1 : 0 + ); + + CPU_REGISTER_TABLE_TEST_THEN_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.EnableVmxInsideSmx, + (State) ? 1 : 0 + ); + + return Status; +} |