UefiCpuPkg CpuCommonFeaturesLib: Enable LMCE feature.
authorEric Dong <eric.dong@intel.com>
Fri, 4 Aug 2017 00:46:41 +0000 (08:46 +0800)
committerEric Dong <eric.dong@intel.com>
Fri, 4 Aug 2017 00:49:05 +0000 (08:49 +0800)
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>
UefiCpuPkg/Library/CpuCommonFeaturesLib/CpuCommonFeatures.h
UefiCpuPkg/Library/CpuCommonFeaturesLib/CpuCommonFeaturesLib.c
UefiCpuPkg/Library/CpuCommonFeaturesLib/CpuCommonFeaturesLib.inf
UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c [new file with mode: 0644]

index c5bc62b2072891f24525affb669972feee124683..b8269b00f3f3f4c724eb205e5d9258a3d1a5401e 100644 (file)
@@ -909,4 +909,56 @@ PpinInitialize (
   IN BOOLEAN                           State\r
   );\r
 \r
+/**\r
+  Detects if Local machine check exception feature supported on current \r
+  processor.\r
+\r
+  @param[in]  ProcessorNumber  The index of the CPU executing this function.\r
+  @param[in]  CpuInfo          A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r
+                               structure for the CPU executing this function.\r
+  @param[in]  ConfigData       A pointer to the configuration buffer returned\r
+                               by CPU_FEATURE_GET_CONFIG_DATA.  NULL if\r
+                               CPU_FEATURE_GET_CONFIG_DATA was not provided in\r
+                               RegisterCpuFeature().\r
+\r
+  @retval TRUE     Local machine check exception feature is supported.\r
+  @retval FALSE    Local machine check exception feature is not supported.\r
+\r
+  @note This service could be called by BSP/APs.\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+LmceSupport (\r
+  IN UINTN                             ProcessorNumber,\r
+  IN REGISTER_CPU_FEATURE_INFORMATION  *CpuInfo,\r
+  IN VOID                              *ConfigData  OPTIONAL\r
+  );\r
+\r
+/**\r
+  Initializes Local machine check exception feature to specific state.\r
+\r
+  @param[in]  ProcessorNumber  The index of the CPU executing this function.\r
+  @param[in]  CpuInfo          A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r
+                               structure for the CPU executing this function.\r
+  @param[in]  ConfigData       A pointer to the configuration buffer returned\r
+                               by CPU_FEATURE_GET_CONFIG_DATA.  NULL if\r
+                               CPU_FEATURE_GET_CONFIG_DATA was not provided in\r
+                               RegisterCpuFeature().\r
+  @param[in]  State            If TRUE, then the Local machine check exception\r
+                               feature must be enabled.\r
+                               If FALSE, then the Local machine check exception\r
+                               feature must be disabled.\r
+\r
+  @retval RETURN_SUCCESS       Local machine check exception feature is initialized.\r
+\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+LmceInitialize (\r
+  IN UINTN                             ProcessorNumber,\r
+  IN REGISTER_CPU_FEATURE_INFORMATION  *CpuInfo,\r
+  IN VOID                              *ConfigData,  OPTIONAL\r
+  IN BOOLEAN                           State\r
+  );\r
+\r
 #endif\r
index b88b7d1e6d008813ed73c5f188edfd68c3e03151..4c78209a18bc48ced1a34c0e522d2fd68350166c 100644 (file)
@@ -217,6 +217,18 @@ CpuCommonFeaturesLibConstructor (
                );\r
     ASSERT_EFI_ERROR (Status);\r
   }\r
+  if (IsCpuFeatureSupported (CPU_FEATURE_LMCE)) {\r
+    Status = RegisterCpuFeature (\r
+               "LMCE",\r
+               NULL,\r
+               LmceSupport,\r
+               LmceInitialize,\r
+               CPU_FEATURE_LMCE,\r
+               CPU_FEATURE_LOCK_FEATURE_CONTROL_REGISTER | CPU_FEATURE_BEFORE,\r
+               CPU_FEATURE_END\r
+               );\r
+    ASSERT_EFI_ERROR (Status);\r
+  }\r
 \r
   return RETURN_SUCCESS;\r
 }\r
index 202d5608b867096883723ae64b1a3623afdb79d3..2cca58e7fc0353534c7b9ebb2b70c819780f04ec 100644 (file)
@@ -48,6 +48,7 @@
   PendingBreak.c\r
   X2Apic.c\r
   Ppin.c\r
+  Lmce.c\r
 \r
 [Packages]\r
   MdePkg/MdePkg.dec\r
diff --git a/UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c b/UefiCpuPkg/Library/CpuCommonFeaturesLib/Lmce.c
new file mode 100644 (file)
index 0000000..65e5cd3
--- /dev/null
@@ -0,0 +1,93 @@
+/** @file\r
+  Local machine check exception feature.\r
+\r
+  Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>\r
+  This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include "CpuCommonFeatures.h"\r
+\r
+/**\r
+  Detects if Local machine check exception feature supported on current \r
+  processor.\r
+\r
+  @param[in]  ProcessorNumber  The index of the CPU executing this function.\r
+  @param[in]  CpuInfo          A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r
+                               structure for the CPU executing this function.\r
+  @param[in]  ConfigData       A pointer to the configuration buffer returned\r
+                               by CPU_FEATURE_GET_CONFIG_DATA.  NULL if\r
+                               CPU_FEATURE_GET_CONFIG_DATA was not provided in\r
+                               RegisterCpuFeature().\r
+\r
+  @retval TRUE     Local machine check exception feature is supported.\r
+  @retval FALSE    Local machine check exception feature is not supported.\r
+\r
+  @note This service could be called by BSP/APs.\r
+**/\r
+BOOLEAN\r
+EFIAPI\r
+LmceSupport (\r
+  IN UINTN                             ProcessorNumber,\r
+  IN REGISTER_CPU_FEATURE_INFORMATION  *CpuInfo,\r
+  IN VOID                              *ConfigData  OPTIONAL\r
+  )\r
+{\r
+  MSR_IA32_MCG_CAP_REGISTER    McgCap;\r
+\r
+  McgCap.Uint64 = AsmReadMsr64 (MSR_IA32_MCG_CAP);\r
+  if (ProcessorNumber == 0) {\r
+    DEBUG ((EFI_D_INFO, "LMCE eanble = %x\n", (BOOLEAN) (McgCap.Bits.MCG_LMCE_P != 0)));\r
+  }\r
+  return (BOOLEAN) (McgCap.Bits.MCG_LMCE_P != 0);\r
+}\r
+\r
+/**\r
+  Initializes Local machine check exception feature to specific state.\r
+\r
+  @param[in]  ProcessorNumber  The index of the CPU executing this function.\r
+  @param[in]  CpuInfo          A pointer to the REGISTER_CPU_FEATURE_INFORMATION\r
+                               structure for the CPU executing this function.\r
+  @param[in]  ConfigData       A pointer to the configuration buffer returned\r
+                               by CPU_FEATURE_GET_CONFIG_DATA.  NULL if\r
+                               CPU_FEATURE_GET_CONFIG_DATA was not provided in\r
+                               RegisterCpuFeature().\r
+  @param[in]  State            If TRUE, then the Local machine check exception\r
+                               feature must be enabled.\r
+                               If FALSE, then the Local machine check exception\r
+                               feature must be disabled.\r
+\r
+  @retval RETURN_SUCCESS       Local machine check exception feature is initialized.\r
+\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+LmceInitialize (\r
+  IN UINTN                             ProcessorNumber,\r
+  IN REGISTER_CPU_FEATURE_INFORMATION  *CpuInfo,\r
+  IN VOID                              *ConfigData,  OPTIONAL\r
+  IN BOOLEAN                           State\r
+  )\r
+{\r
+  MSR_IA32_FEATURE_CONTROL_REGISTER    *MsrRegister;\r
+\r
+  ASSERT (ConfigData != NULL);\r
+  MsrRegister = (MSR_IA32_FEATURE_CONTROL_REGISTER *) ConfigData;\r
+  if (MsrRegister[ProcessorNumber].Bits.Lock == 0) {\r
+    CPU_REGISTER_TABLE_WRITE_FIELD (\r
+      ProcessorNumber,\r
+      Msr,\r
+      MSR_IA32_FEATURE_CONTROL,\r
+      MSR_IA32_FEATURE_CONTROL_REGISTER,\r
+      Bits.LmceOn,\r
+      (State) ? 1 : 0\r
+      );\r
+  }\r
+  return RETURN_SUCCESS;\r
+}\r