UefiCpuPkg/LocalApicLib: Add GetProcessorLocation2ByApicId() API

[mirror_edk2.git] / UefiCpuPkg / Library / BaseXApicX2ApicLib / BaseXApicX2ApicLib.c

diff --git a/UefiCpuPkg/Library/BaseXApicX2ApicLib/BaseXApicX2ApicLib.c b/UefiCpuPkg/Library/BaseXApicX2ApicLib/BaseXApicX2ApicLib.c
index 6b89faf3dfdb611654350ea6eb5a0717c13cbb7e..79338186fbbf2963f7ac946b704cc9723d5970d1 100644 (file)
--- a/UefiCpuPkg/Library/BaseXApicX2ApicLib/BaseXApicX2ApicLib.c
+++ b/UefiCpuPkg/Library/BaseXApicX2ApicLib/BaseXApicX2ApicLib.c
@@ -4,7 +4,7 @@
   This local APIC library instance supports x2APIC capable processors\r
   which have xAPIC and x2APIC modes.\r
 \r
   This local APIC library instance supports x2APIC capable processors\r
   which have xAPIC and x2APIC modes.\r
 \r

-  Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>\r
+  Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR>\r

   Copyright (c) 2017, AMD Inc. All rights reserved.<BR>\r
 \r
   This program and the accompanying materials\r
   Copyright (c) 2017, AMD Inc. All rights reserved.<BR>\r
 \r
   This program and the accompanying materials\r


@@ -1251,3 +1251,126 @@ GetProcessorLocationByApicId (
     *Package = (InitialApicId >> (ThreadBits + CoreBits));\r
   }\r
 }\r
     *Package = (InitialApicId >> (ThreadBits + CoreBits));\r
   }\r
 }\r

+\r
+/**\r
+  Get Package ID/Die ID/Tile ID/Module ID/Core ID/Thread ID of a processor.\r
+\r
+  The algorithm assumes the target system has symmetry across physical\r
+  package boundaries with respect to the number of threads per core, number of\r
+  cores per module, number of modules per tile, number of tiles per die, number\r
+  of dies per package.\r
+\r
+  @param[in]   InitialApicId Initial APIC ID of the target logical processor.\r
+  @param[out]  Package       Returns the processor package ID.\r
+  @param[out]  Die           Returns the processor die ID.\r
+  @param[out]  Tile          Returns the processor tile ID.\r
+  @param[out]  Module        Returns the processor module ID.\r
+  @param[out]  Core          Returns the processor core ID.\r
+  @param[out]  Thread        Returns the processor thread ID.\r
+**/\r
+VOID\r
+EFIAPI\r
+GetProcessorLocation2ByApicId (\r
+  IN  UINT32  InitialApicId,\r
+  OUT UINT32  *Package  OPTIONAL,\r
+  OUT UINT32  *Die      OPTIONAL,\r
+  OUT UINT32  *Tile     OPTIONAL,\r
+  OUT UINT32  *Module   OPTIONAL,\r
+  OUT UINT32  *Core     OPTIONAL,\r
+  OUT UINT32  *Thread   OPTIONAL\r
+  )\r
+{\r
+  CPUID_EXTENDED_TOPOLOGY_EAX         ExtendedTopologyEax;\r
+  CPUID_EXTENDED_TOPOLOGY_ECX         ExtendedTopologyEcx;\r
+  UINT32                              MaxStandardCpuIdIndex;\r
+  UINT32                              Index;\r
+  UINTN                               LevelType;\r
+  UINT32                              Bits[CPUID_V2_EXTENDED_TOPOLOGY_LEVEL_TYPE_DIE + 2];\r
+  UINT32                              *Location[CPUID_V2_EXTENDED_TOPOLOGY_LEVEL_TYPE_DIE + 2];\r
+\r
+  for (LevelType = 0; LevelType < ARRAY_SIZE (Bits); LevelType++) {\r
+    Bits[LevelType] = 0;\r
+  }\r
+\r
+  //\r
+  // Get max index of CPUID\r
+  //\r
+  AsmCpuid (CPUID_SIGNATURE, &MaxStandardCpuIdIndex, NULL, NULL, NULL);\r
+  if (MaxStandardCpuIdIndex < CPUID_V2_EXTENDED_TOPOLOGY) {\r
+    if (Die != NULL) {\r
+      *Die = 0;\r
+    }\r
+    if (Tile != NULL) {\r
+      *Tile = 0;\r
+    }\r
+    if (Module != NULL) {\r
+      *Module = 0;\r
+    }\r
+    GetProcessorLocationByApicId (InitialApicId, Package, Core, Thread);\r
+    return;\r
+  }\r
+\r
+  //\r
+  // If the V2 extended topology enumeration leaf is available, it\r
+  // is the preferred mechanism for enumerating topology.\r
+  //\r
+  for (Index = 0; ; Index++) {\r
+    AsmCpuidEx(\r
+      CPUID_V2_EXTENDED_TOPOLOGY,\r
+      Index,\r
+      &ExtendedTopologyEax.Uint32,\r
+      NULL,\r
+      &ExtendedTopologyEcx.Uint32,\r
+      NULL\r
+      );\r
+\r
+    LevelType = ExtendedTopologyEcx.Bits.LevelType;\r
+\r
+    //\r
+    // first level reported should be SMT.\r
+    //\r
+    ASSERT ((Index != 0) || (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_SMT));\r
+    if (LevelType == CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_INVALID) {\r
+      break;\r
+    }\r
+    ASSERT (LevelType < ARRAY_SIZE (Bits));\r
+    Bits[LevelType] = ExtendedTopologyEax.Bits.ApicIdShift;\r
+  }\r
+\r
+  for (LevelType = CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_CORE; LevelType < ARRAY_SIZE (Bits); LevelType++) {\r
+    //\r
+    // If there are more levels between level-1 (low-level) and level-2 (high-level), the unknown levels will be ignored\r
+    // and treated as an extension of the last known level (i.e., level-1 in this case).\r
+    //\r
+    if (Bits[LevelType] == 0) {\r
+      Bits[LevelType] = Bits[LevelType - 1];\r
+    }\r
+  }\r
+\r
+  Location[CPUID_V2_EXTENDED_TOPOLOGY_LEVEL_TYPE_DIE + 1] = Package;\r
+  Location[CPUID_V2_EXTENDED_TOPOLOGY_LEVEL_TYPE_DIE    ] = Die;\r
+  Location[CPUID_V2_EXTENDED_TOPOLOGY_LEVEL_TYPE_TILE   ] = Tile;\r
+  Location[CPUID_V2_EXTENDED_TOPOLOGY_LEVEL_TYPE_MODULE ] = Module;\r
+  Location[CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_CORE   ]    = Core;\r
+  Location[CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_SMT    ]    = Thread;\r
+\r
+  Bits[CPUID_V2_EXTENDED_TOPOLOGY_LEVEL_TYPE_DIE + 1] = 32;\r
+\r
+  for ( LevelType = CPUID_EXTENDED_TOPOLOGY_LEVEL_TYPE_SMT\r
+      ; LevelType <= CPUID_V2_EXTENDED_TOPOLOGY_LEVEL_TYPE_DIE + 1\r
+      ; LevelType ++\r
+      ) {\r
+    if (Location[LevelType] != NULL) {\r
+      //\r
+      // Bits[i] holds the number of bits to shift right on x2APIC ID to get a unique\r
+      // topology ID of the next level type.\r
+      //\r
+      *Location[LevelType] = InitialApicId >> Bits[LevelType - 1];\r
+\r
+      //\r
+      // Bits[i] - Bits[i-1] holds the number of bits for the next ONE level type.\r
+      //\r
+      *Location[LevelType] &= (1 << (Bits[LevelType] - Bits[LevelType - 1])) - 1;\r
+    }\r
+  }\r
+}\r