diff options
Diffstat (limited to 'UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c')
| -rw-r--r-- | UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c | 182 |
1 files changed, 91 insertions, 91 deletions
diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c index dd4293ee38..921656a1e8 100644 --- a/UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c +++ b/UefiCpuPkg/Library/CpuCommonFeaturesLib/ExecuteDisable.c @@ -1,91 +1,91 @@ -/** @file - Execute Disable feature. - - 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" - -/** - Detects if Execute Disable 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 Execute Disable feature is supported. - @retval FALSE Execute Disable feature is not supported. - - @note This service could be called by BSP/APs. -**/ -BOOLEAN -EFIAPI -ExecuteDisableSupport ( - IN UINTN ProcessorNumber, - IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, - IN VOID *ConfigData OPTIONAL - ) -{ - UINT32 Eax; - CPUID_EXTENDED_CPU_SIG_EDX Edx; - - AsmCpuid (CPUID_EXTENDED_FUNCTION, &Eax, NULL, NULL, NULL); - if (Eax <= CPUID_EXTENDED_FUNCTION) { - // - // Extended CPUID functions are not supported on this processor. - // - return FALSE; - } - - AsmCpuid (CPUID_EXTENDED_CPU_SIG, NULL, NULL, NULL, &Edx.Uint32); - return (Edx.Bits.NX != 0); -} - -/** - Initializes Execute Disable 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 Execute Disable feature must be enabled. - If FALSE, then the Execute Disable feature must be disabled. - - @retval RETURN_SUCCESS Execute Disable feature is initialized. - - @note This service could be called by BSP only. -**/ -RETURN_STATUS -EFIAPI -ExecuteDisableInitialize ( - IN UINTN ProcessorNumber, - IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo, - IN VOID *ConfigData, OPTIONAL - IN BOOLEAN State - ) -{ - CPU_REGISTER_TABLE_WRITE_FIELD ( - ProcessorNumber, - Msr, - MSR_IA32_EFER, - MSR_IA32_EFER_REGISTER, - Bits.NXE, - (State) ? 1 : 0 - ); - return RETURN_SUCCESS; -} +/** @file
+ Execute Disable feature.
+
+ 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"
+
+/**
+ Detects if Execute Disable 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 Execute Disable feature is supported.
+ @retval FALSE Execute Disable feature is not supported.
+
+ @note This service could be called by BSP/APs.
+**/
+BOOLEAN
+EFIAPI
+ExecuteDisableSupport (
+ IN UINTN ProcessorNumber,
+ IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
+ IN VOID *ConfigData OPTIONAL
+ )
+{
+ UINT32 Eax;
+ CPUID_EXTENDED_CPU_SIG_EDX Edx;
+
+ AsmCpuid (CPUID_EXTENDED_FUNCTION, &Eax, NULL, NULL, NULL);
+ if (Eax <= CPUID_EXTENDED_FUNCTION) {
+ //
+ // Extended CPUID functions are not supported on this processor.
+ //
+ return FALSE;
+ }
+
+ AsmCpuid (CPUID_EXTENDED_CPU_SIG, NULL, NULL, NULL, &Edx.Uint32);
+ return (Edx.Bits.NX != 0);
+}
+
+/**
+ Initializes Execute Disable 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 Execute Disable feature must be enabled.
+ If FALSE, then the Execute Disable feature must be disabled.
+
+ @retval RETURN_SUCCESS Execute Disable feature is initialized.
+
+ @note This service could be called by BSP only.
+**/
+RETURN_STATUS
+EFIAPI
+ExecuteDisableInitialize (
+ IN UINTN ProcessorNumber,
+ IN REGISTER_CPU_FEATURE_INFORMATION *CpuInfo,
+ IN VOID *ConfigData, OPTIONAL
+ IN BOOLEAN State
+ )
+{
+ CPU_REGISTER_TABLE_WRITE_FIELD (
+ ProcessorNumber,
+ Msr,
+ MSR_IA32_EFER,
+ MSR_IA32_EFER_REGISTER,
+ Bits.NXE,
+ (State) ? 1 : 0
+ );
+ return RETURN_SUCCESS;
+}
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