UefiCpuPkg/PiSmmCpu: Add 2 APIs in SmmCpuFeaturesLib.

SmmCpuFeaturesCompleteSmmReadyToLock() is a hook point to
allow CPU specific code to do more registers setting after
the gEfiSmmReadyToLockProtocolGuid notification is completely
processed.

SmmCpuFeaturesAllocatePageTableMemory() is an API to allow
CPU to allocate a specific region for storing page tables.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: "Yao, Jiewen" <jiewen.yao@intel.com>
Reviewed-by: "Kinney, Michael D" <michael.d.kinney@intel.com>
Cc: "Fan, Jeff" <jeff.fan@intel.com>
Cc: "Kinney, Michael D" <michael.d.kinney@intel.com>
Cc: "Laszlo Ersek" <lersek@redhat.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18979 6f19259b-4bc3-4df7-8a09-765794883524

diff --git a/UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h b/UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h
index d1c7a8ac965c4f0fbc67b2c9b41f7913b5111074..4478003467c88d30f7500032650ff991bc75b143 100644 (file)
--- a/UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h
+++ b/UefiCpuPkg/Include/Library/SmmCpuFeaturesLib.h
@@ -363,4 +363,39 @@ SmmCpuFeaturesWriteSaveStateRegister (
   IN CONST VOID                   *Buffer\r
   );\r
 \r
+/**\r
+  This function is hook point called after the gEfiSmmReadyToLockProtocolGuid\r
+  notification is completely processed.\r
+**/\r
+VOID\r
+EFIAPI\r
+SmmCpuFeaturesCompleteSmmReadyToLock (\r
+  VOID\r
+  );\r
+\r
+/**\r
+  This API provides a method for a CPU to allocate a specific region for storing page tables.\r
+\r
+  This API can be called more once to allocate memory for page tables.\r
+\r
+  Allocates the number of 4KB pages of type EfiRuntimeServicesData and returns a pointer to the\r
+  allocated buffer.  The buffer returned is aligned on a 4KB boundary.  If Pages is 0, then NULL\r
+  is returned.  If there is not enough memory remaining to satisfy the request, then NULL is\r
+  returned.\r
+\r
+  This function can also return NULL if there is no preference on where the page tables are allocated in SMRAM.\r
+\r
+  @param  Pages                 The number of 4 KB pages to allocate.\r
+\r
+  @return A pointer to the allocated buffer for page tables.\r
+  @retval NULL      Fail to allocate a specific region for storing page tables,\r
+                    Or there is no preference on where the page tables are allocated in SMRAM.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+SmmCpuFeaturesAllocatePageTableMemory (\r
+  IN UINTN           Pages\r
+  );\r
+\r
 #endif\r