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

[mirror_edk2.git] / OvmfPkg / AcpiPlatformDxe / Qemu.c

diff --git a/OvmfPkg/AcpiPlatformDxe/Qemu.c b/OvmfPkg/AcpiPlatformDxe/Qemu.c
index 5ab89aa6c6f091091489bfb68784fba4da76ecef..90f06bba6399427af9bb8028efa3a2503a982cfd 100644 (file)
--- a/OvmfPkg/AcpiPlatformDxe/Qemu.c
+++ b/OvmfPkg/AcpiPlatformDxe/Qemu.c
@@ -1,7 +1,10 @@
 /** @file\r
   OVMF ACPI QEMU support\r
 \r
-  Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>\r
+  Copyright (c) 2008 - 2014, Intel Corporation. All rights reserved.<BR>\r
+\r
+  Copyright (C) 2012-2014, Red Hat, Inc.\r
+\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
@@ -13,11 +16,13 @@
 **/\r
 \r
 #include "AcpiPlatform.h"\r
+#include "QemuLoader.h"\r
 #include <Library/BaseMemoryLib.h>\r
 #include <Library/MemoryAllocationLib.h>\r
 #include <Library/QemuFwCfgLib.h>\r
 #include <Library/DxeServicesTableLib.h>\r
 #include <Library/PcdLib.h>\r
+#include <Library/OrderedCollectionLib.h>\r
 #include <IndustryStandard/Acpi.h>\r
 \r
 BOOLEAN\r
@@ -196,6 +201,23 @@ typedef struct {
   PCI_WINDOW PciWindow64;\r
 } FIRMWARE_DATA;\r
 \r
+typedef struct {\r
+  UINT8 BytePrefix;\r
+  UINT8 ByteValue;\r
+} AML_BYTE;\r
+\r
+typedef struct {\r
+  UINT8    NameOp;\r
+  UINT8    RootChar;\r
+  UINT8    NameChar[4];\r
+  UINT8    PackageOp;\r
+  UINT8    PkgLength;\r
+  UINT8    NumElements;\r
+  AML_BYTE Pm1aCntSlpTyp;\r
+  AML_BYTE Pm1bCntSlpTyp;\r
+  AML_BYTE Reserved[2];\r
+} SYSTEM_STATE_PACKAGE;\r
+\r
 #pragma pack()\r
 \r
 \r
@@ -230,7 +252,7 @@ PopulateFwData(
       Desc = &AllDesc[CurDesc];\r
       ExclTop = Desc->BaseAddress + Desc->Length;\r
 \r
-      if (ExclTop <= BASE_4GB) {\r
+      if (ExclTop <= (UINT64) PcdGet32 (PcdOvmfFdBaseAddress)) {\r
         switch (Desc->GcdMemoryType) {\r
           case EfiGcdMemoryTypeNonExistent:\r
             break;\r
@@ -295,6 +317,86 @@ PopulateFwData(
 }\r
 \r
 \r
+STATIC\r
+VOID\r
+EFIAPI\r
+GetSuspendStates (\r
+  UINTN                *SuspendToRamSize,\r
+  SYSTEM_STATE_PACKAGE *SuspendToRam,\r
+  UINTN                *SuspendToDiskSize,\r
+  SYSTEM_STATE_PACKAGE *SuspendToDisk\r
+  )\r
+{\r
+  STATIC CONST SYSTEM_STATE_PACKAGE Template = {\r
+    0x08,                   // NameOp\r
+    '\\',                   // RootChar\r
+    { '_', 'S', 'x', '_' }, // NameChar[4]\r
+    0x12,                   // PackageOp\r
+    0x0A,                   // PkgLength\r
+    0x04,                   // NumElements\r
+    { 0x0A, 0x00 },         // Pm1aCntSlpTyp\r
+    { 0x0A, 0x00 },         // Pm1bCntSlpTyp -- we don't support it\r
+    {                       // Reserved[2]\r
+      { 0x0A, 0x00 },\r
+      { 0x0A, 0x00 }\r
+    }\r
+  };\r
+  RETURN_STATUS                     Status;\r
+  FIRMWARE_CONFIG_ITEM              FwCfgItem;\r
+  UINTN                             FwCfgSize;\r
+  UINT8                             SystemStates[6];\r
+\r
+  //\r
+  // configure defaults\r
+  //\r
+  *SuspendToRamSize = sizeof Template;\r
+  CopyMem (SuspendToRam, &Template, sizeof Template);\r
+  SuspendToRam->NameChar[2]             = '3'; // S3\r
+  SuspendToRam->Pm1aCntSlpTyp.ByteValue = 1;   // PIIX4: STR\r
+\r
+  *SuspendToDiskSize = sizeof Template;\r
+  CopyMem (SuspendToDisk, &Template, sizeof Template);\r
+  SuspendToDisk->NameChar[2]             = '4'; // S4\r
+  SuspendToDisk->Pm1aCntSlpTyp.ByteValue = 2;   // PIIX4: POSCL\r
+\r
+  //\r
+  // check for overrides\r
+  //\r
+  Status = QemuFwCfgFindFile ("etc/system-states", &FwCfgItem, &FwCfgSize);\r
+  if (Status != RETURN_SUCCESS || FwCfgSize != sizeof SystemStates) {\r
+    DEBUG ((DEBUG_INFO, "ACPI using S3/S4 defaults\n"));\r
+    return;\r
+  }\r
+  QemuFwCfgSelectItem (FwCfgItem);\r
+  QemuFwCfgReadBytes (sizeof SystemStates, SystemStates);\r
+\r
+  //\r
+  // Each byte corresponds to a system state. In each byte, the MSB tells us\r
+  // whether the given state is enabled. If so, the three LSBs specify the\r
+  // value to be written to the PM control register's SUS_TYP bits.\r
+  //\r
+  if (SystemStates[3] & BIT7) {\r
+    SuspendToRam->Pm1aCntSlpTyp.ByteValue =\r
+        SystemStates[3] & (BIT2 | BIT1 | BIT0);\r
+    DEBUG ((DEBUG_INFO, "ACPI S3 value: %d\n",\r
+            SuspendToRam->Pm1aCntSlpTyp.ByteValue));\r
+  } else {\r
+    *SuspendToRamSize = 0;\r
+    DEBUG ((DEBUG_INFO, "ACPI S3 disabled\n"));\r
+  }\r
+\r
+  if (SystemStates[4] & BIT7) {\r
+    SuspendToDisk->Pm1aCntSlpTyp.ByteValue =\r
+        SystemStates[4] & (BIT2 | BIT1 | BIT0);\r
+    DEBUG ((DEBUG_INFO, "ACPI S4 value: %d\n",\r
+            SuspendToDisk->Pm1aCntSlpTyp.ByteValue));\r
+  } else {\r
+    *SuspendToDiskSize = 0;\r
+    DEBUG ((DEBUG_INFO, "ACPI S4 disabled\n"));\r
+  }\r
+}\r
+\r
+\r
 STATIC\r
 EFI_STATUS\r
 EFIAPI\r
@@ -312,10 +414,16 @@ QemuInstallAcpiSsdtTable (
 \r
   FwData = AllocateReservedPool (sizeof (*FwData));\r
   if (FwData != NULL) {\r
-    UINTN SsdtSize;\r
-    UINT8 *Ssdt;\r
-\r
-    SsdtSize = AcpiTableBufferSize + 17;\r
+    UINTN                SuspendToRamSize;\r
+    SYSTEM_STATE_PACKAGE SuspendToRam;\r
+    UINTN                SuspendToDiskSize;\r
+    SYSTEM_STATE_PACKAGE SuspendToDisk;\r
+    UINTN                SsdtSize;\r
+    UINT8                *Ssdt;\r
+\r
+    GetSuspendStates (&SuspendToRamSize,  &SuspendToRam,\r
+                      &SuspendToDiskSize, &SuspendToDisk);\r
+    SsdtSize = AcpiTableBufferSize + 17 + SuspendToRamSize + SuspendToDiskSize;\r
     Ssdt = AllocatePool (SsdtSize);\r
 \r
     if (Ssdt != NULL) {\r
@@ -352,6 +460,14 @@ QemuInstallAcpiSsdtTable (
         *(UINT32*) SsdtPtr = sizeof (*FwData);\r
         SsdtPtr += 4;\r
 \r
+        //\r
+        // add suspend system states\r
+        //\r
+        CopyMem (SsdtPtr, &SuspendToRam, SuspendToRamSize);\r
+        SsdtPtr += SuspendToRamSize;\r
+        CopyMem (SsdtPtr, &SuspendToDisk, SuspendToDiskSize);\r
+        SsdtPtr += SuspendToDiskSize;\r
+\r
         ASSERT((UINTN) (SsdtPtr - Ssdt) == SsdtSize);\r
         ((EFI_ACPI_DESCRIPTION_HEADER *) Ssdt)->Length = (UINT32) SsdtSize;\r
         Status = InstallAcpiTable (AcpiProtocol, Ssdt, SsdtSize, TableKey);\r
@@ -400,4 +516,3 @@ QemuInstallAcpiTable (
            TableKey\r
            );\r
 }\r
-\r