OvmfPkg/MemEncryptSevLib: find pages of initial SMRAM save state map

[mirror_edk2.git] / OvmfPkg / Include / Library / MemEncryptSevLib.h

diff --git a/OvmfPkg/Include/Library/MemEncryptSevLib.h b/OvmfPkg/Include/Library/MemEncryptSevLib.h
index e5ebb4401818a5d1b824f783065c18be427a30c1..1e2ec8641d465851775dbff33883339b30ed57c2 100644 (file)
--- a/OvmfPkg/Include/Library/MemEncryptSevLib.h
+++ b/OvmfPkg/Include/Library/MemEncryptSevLib.h
@@ -86,4 +86,27 @@ MemEncryptSevSetPageEncMask (
   IN UINTN                    NumPages,\r
   IN BOOLEAN                  Flush\r
   );\r
+\r
+\r
+/**\r
+  Locate the page range that covers the initial (pre-SMBASE-relocation) SMRAM\r
+  Save State Map.\r
+\r
+  @param[out] BaseAddress     The base address of the lowest-address page that\r
+                              covers the initial SMRAM Save State Map.\r
+\r
+  @param[out] NumberOfPages   The number of pages in the page range that covers\r
+                              the initial SMRAM Save State Map.\r
+\r
+  @retval RETURN_SUCCESS      BaseAddress and NumberOfPages have been set on\r
+                              output.\r
+\r
+  @retval RETURN_UNSUPPORTED  SMM is unavailable.\r
+**/\r
+RETURN_STATUS\r
+EFIAPI\r
+MemEncryptSevLocateInitialSmramSaveStateMapPages (\r
+  OUT UINTN *BaseAddress,\r
+  OUT UINTN *NumberOfPages\r
+  );\r
 #endif // _MEM_ENCRYPT_SEV_LIB_H_\r