OvmfPkg: PlatformPei: reserve SEC/PEI temp RAM for S3 resume

[mirror_edk2.git] / OvmfPkg / PlatformPei / MemDetect.c

diff --git a/OvmfPkg/PlatformPei/MemDetect.c b/OvmfPkg/PlatformPei/MemDetect.c
index c198c3846fdcf68a4757c9e029b87e27dfb26099..d35ee53c77bfcdc2f627309c042384c4846bcda1 100644 (file)
--- a/OvmfPkg/PlatformPei/MemDetect.c
+++ b/OvmfPkg/PlatformPei/MemDetect.c
@@ -192,5 +192,16 @@ InitializeRamRegions (
       (UINT64)(UINTN) PcdGet32 (PcdS3AcpiReservedMemorySize),\r
       EfiACPIMemoryNVS\r
       );\r
+\r
+    //\r
+    // Cover the initial RAM area used as stack and temporary PEI heap.\r
+    //\r
+    // This is reserved as ACPI NVS so it can be used on S3 resume.\r
+    //\r
+    BuildMemoryAllocationHob (\r
+      PcdGet32 (PcdOvmfSecPeiTempRamBase),\r
+      PcdGet32 (PcdOvmfSecPeiTempRamSize),\r
+      EfiACPIMemoryNVS\r
+      );\r
   }\r
 }\r