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Diffstat (limited to 'UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c')
-rw-r--r-- | UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c new file mode 100644 index 0000000000..e627a65dfd --- /dev/null +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/FeatureControl.c @@ -0,0 +1,314 @@ +/** @file + Features in MSR_IA32_FEATURE_CONTROL register. + + Copyright (c) 2017, Intel Corporation. All rights reserved.<BR> + This program and the accompanying materials + are licensed and made available under the terms and conditions of the BSD License + which accompanies this distribution. The full text of the license may be found at + http://opensource.org/licenses/bsd-license.php + + THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, + WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +**/ + +#include "CpuCommonFeatures.h" + +/** + Prepares for the data used by CPU feature detection and initialization. + + @param[in] NumberOfProcessors The number of CPUs in the platform. + + @return Pointer to a buffer of CPU related configuration data. + + @note This service could be called by BSP only. +**/ +VOID * +EFIAPI +FeatureControlGetConfigData ( + IN UINTN NumberOfProcessors + ) +{ + VOID *ConfigData; + + ConfigData = AllocateZeroPool (sizeof (MSR_IA32_FEATURE_CONTROL_REGISTER) * NumberOfProcessors); + ASSERT (ConfigData != NULL); + return ConfigData; +} + +/** + 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 + ) +{ + MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister; + + ASSERT (ConfigData != NULL); + MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData; + MsrRegister[ProcessorNumber].Uint64 = AsmReadMsr64 (MSR_IA32_FEATURE_CONTROL); + return (CpuInfo->CpuIdVersionInfoEcx.Bits.VMX == 1); +} + +/** + Initializes VMX inside 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 the VMX inside SMX feature must be enabled. + If FALSE, then the VMX inside SMX feature must be disabled. + + @retval RETURN_SUCCESS VMX inside SMX feature is initialized. + + @note This service could be called by BSP only. +**/ +RETURN_STATUS +EFIAPI +VmxInsideSmxInitialize ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData, OPTIONAL + IN BOOLEAN State + ) +{ + MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister; + + ASSERT (ConfigData != NULL); + MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData; + if (MsrRegister[ProcessorNumber].Bits.Lock == 0) { + CPU_REGISTER_TABLE_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.EnableVmxInsideSmx, + (State) ? 1 : 0 + ); + } + return RETURN_SUCCESS; +} + +/** + Initializes SENTER 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 SENTER feature must be enabled. + If FALSE, then the SENTER feature must be disabled. + + @retval RETURN_SUCCESS SENTER feature is initialized. + + @note This service could be called by BSP only. +**/ +RETURN_STATUS +EFIAPI +SenterInitialize ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData, OPTIONAL + IN BOOLEAN State + ) +{ + MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister; + + ASSERT (ConfigData != NULL); + MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData; + if (MsrRegister[ProcessorNumber].Bits.Lock == 0) { + CPU_REGISTER_TABLE_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.SenterLocalFunctionEnables, + (State) ? 0x7F : 0 + ); + + CPU_REGISTER_TABLE_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.SenterGlobalEnable, + (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 + ) +{ + MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister; + + ASSERT (ConfigData != NULL); + MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData; + MsrRegister[ProcessorNumber].Uint64 = AsmReadMsr64 (MSR_IA32_FEATURE_CONTROL); + 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 + ) +{ + MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister; + + ASSERT (ConfigData != NULL); + MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData; + if (MsrRegister[ProcessorNumber].Bits.Lock == 0) { + CPU_REGISTER_TABLE_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 + ) +{ + MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister; + + ASSERT (ConfigData != NULL); + MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData; + MsrRegister[ProcessorNumber].Uint64 = AsmReadMsr64 (MSR_IA32_FEATURE_CONTROL); + return (CpuInfo->CpuIdVersionInfoEcx.Bits.SMX == 1); +} + +/** + Initializes VMX outside 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 the VMX outside SMX feature must be enabled. + If FALSE, then the VMX outside SMX feature must be disabled. + + @retval RETURN_SUCCESS VMX outside SMX feature is initialized. + + @note This service could be called by BSP only. +**/ +RETURN_STATUS +EFIAPI +VmxOutsideSmxInitialize ( + IN UINTN ProcessorNumber, + IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, + IN VOID *ConfigData, OPTIONAL + IN BOOLEAN State + ) +{ + MSR_IA32_FEATURE_CONTROL_REGISTER *MsrRegister; + + ASSERT (ConfigData != NULL); + MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData; + if (MsrRegister[ProcessorNumber].Bits.Lock == 0) { + CPU_REGISTER_TABLE_WRITE_FIELD ( + ProcessorNumber, + Msr, + MSR_IA32_FEATURE_CONTROL, + MSR_IA32_FEATURE_CONTROL_REGISTER, + Bits.EnableVmxOutsideSmx, + (State) ? 1 : 0 + ); + } + return RETURN_SUCCESS; +} |