OvmfPkg/PlatformPei: Add Xen support

* Make PlatformPei aware of Xen
* Fix assigned PIO and MMIO ranges to be compatible with Xen
* Reserve Xen HVM address range
* Publish XenInfo HOB
* Don't program PIIX4 PMBA for Xen

Signed-off-by: Andrei Warkentin <andreiw@motorola.com>
Reviewed-by: gavinguan
Signed-off-by: jljusten

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12091 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/PlatformPei/Platform.c

@@ -1,7 +1,9 @@
 /**@file
   Platform PEI driver
 
-  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>
+
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -73,6 +75,22 @@ AddIoMemoryBaseSizeHob (
     );
 }
 
+VOID
+AddReservedMemoryBaseSizeHob (
+  EFI_PHYSICAL_ADDRESS        MemoryBase,
+  UINT64                      MemorySize
+  )
+{
+  BuildResourceDescriptorHob (
+    EFI_RESOURCE_MEMORY_RESERVED,
+      EFI_RESOURCE_ATTRIBUTE_PRESENT     |
+      EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+      EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
+      EFI_RESOURCE_ATTRIBUTE_TESTED,
+    MemoryBase,
+    MemorySize
+    );
+}
 
 VOID
 AddIoMemoryRangeHob (
@@ -164,19 +182,19 @@ MemMapInitialization (
   //
   BuildResourceDescriptorHob (
     EFI_RESOURCE_IO,
-      EFI_RESOURCE_ATTRIBUTE_PRESENT     |
-      EFI_RESOURCE_ATTRIBUTE_INITIALIZED,
-    0x1000,
-    0xF000
+    EFI_RESOURCE_ATTRIBUTE_PRESENT     |
+    EFI_RESOURCE_ATTRIBUTE_INITIALIZED,
+    0xC000,
+    0x4000
     );
 
   //
   // Add PCI MMIO space available to PCI resource allocations
   //
   if (TopOfMemory < BASE_2GB) {
-    AddIoMemoryBaseSizeHob (BASE_2GB, 0xFEC00000 - BASE_2GB);
+    AddIoMemoryBaseSizeHob (BASE_2GB, 0xFC000000 - BASE_2GB);
   } else {
-    AddIoMemoryBaseSizeHob (TopOfMemory, 0xFEC00000 - TopOfMemory);
+    AddIoMemoryBaseSizeHob (TopOfMemory, 0xFC000000 - TopOfMemory);
   }
 
   //
@@ -198,6 +216,7 @@ MemMapInitialization (
 
 VOID
 MiscInitialization (
+  BOOLEAN Xen
   )
 {
   //
@@ -210,10 +229,12 @@ MiscInitialization (
   //
   BuildCpuHob (36, 16);
 
-  //
-  // Set the PM I/O base address to 0x400
-  //
-  PciAndThenOr32 (PCI_LIB_ADDRESS (0, 1, 3, 0x40), (UINT32) ~0xfc0, 0x400);
+  if (!Xen) {
+    //
+    // Set the PM I/O base address to 0x400
+    //
+    PciAndThenOr32 (PCI_LIB_ADDRESS (0, 1, 3, 0x40), (UINT32) ~0xfc0, 0x400);
+  }
 }
 
 
@@ -294,7 +315,9 @@ InitializePlatform (
   IN CONST EFI_PEI_SERVICES     **PeiServices
   )
 {
+  EFI_STATUS            Status;
   EFI_PHYSICAL_ADDRESS  TopOfMemory;
+  BOOLEAN               Xen;
 
   DEBUG ((EFI_D_ERROR, "Platform PEIM Loaded\n"));
 
@@ -302,13 +325,16 @@ InitializePlatform (
 
   TopOfMemory = MemDetect ();
 
+  Status = InitializeXen ();
+  Xen = EFI_ERROR (Status) ? FALSE : TRUE;
+
   ReserveEmuVariableNvStore ();
 
   PeiFvInitialization ();
 
   MemMapInitialization (TopOfMemory);
 
-  MiscInitialization ();
+  MiscInitialization (Xen);
 
   BootModeInitialization ();
 

OvmfPkg/PlatformPei/Platform.h

@@ -1,7 +1,7 @@
 /** @file
   Platform PEI module include file.
 
-  Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
   which accompanies this distribution.  The full text of the license may be found at
@@ -45,6 +45,12 @@ AddUntestedMemoryBaseSizeHob (
   UINT64                      MemorySize
   );
 
+VOID
+AddReservedMemoryBaseSizeHob (
+  EFI_PHYSICAL_ADDRESS        MemoryBase,
+  UINT64                      MemorySize
+  );
+
 VOID
 AddUntestedMemoryRangeHob (
   EFI_PHYSICAL_ADDRESS        MemoryBase,
@@ -61,4 +67,9 @@ PeiFvInitialization (
   VOID
   );
 
+EFI_STATUS
+InitializeXen (
+  VOID
+  );
+
 #endif // _PLATFORM_PEI_H_INCLUDED_

OvmfPkg/PlatformPei/PlatformPei.inf

@@ -2,7 +2,7 @@
 #  Platform PEI driver
 #
 #  This module provides platform specific function to detect boot mode.
-#  Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
@@ -33,6 +33,7 @@
   Fv.c
   MemDetect.c
   Platform.c
+  Xen.c
 
 [Packages]
   MdePkg/MdePkg.dec
@@ -41,6 +42,7 @@
 
 [Guids]
   gEfiMemoryTypeInformationGuid
+  gEfiXenInfoGuid
 
 [LibraryClasses]
   DebugLib

OvmfPkg/PlatformPei/Xen.c

@@ -0,0 +1,144 @@
+/**@file
+  Xen Platform PEI support
+
+  Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>
+
+  This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+//
+// The package level header files this module uses
+//
+#include <PiPei.h>
+
+//
+// The Library classes this module consumes
+//
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Guid/XenInfo.h>
+
+#include "Platform.h"
+
+EFI_XEN_INFO mXenInfo;
+
+
+/**
+  Connects to the Hypervisor.
+ 
+  @param  XenLeaf     CPUID index used to connect.
+
+  @return EFI_STATUS
+
+**/
+EFI_STATUS
+XenConnect (
+  UINT32 XenLeaf
+  )
+{
+  UINT32 Index;
+  UINT32 TransferReg;
+  UINT32 TransferPages;
+  UINT32 XenVersion;
+
+  AsmCpuid (XenLeaf + 2, &TransferPages, &TransferReg, NULL, NULL);
+  mXenInfo.HyperPages = AllocatePages (TransferPages);
+  if (!mXenInfo.HyperPages) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  for (Index = 0; Index < TransferPages; Index++) {
+    AsmWriteMsr64 (TransferReg,
+                   (UINTN) mXenInfo.HyperPages +
+                   (Index << EFI_PAGE_SHIFT) + Index);
+  }
+
+  AsmCpuid (XenLeaf + 1, &XenVersion, NULL, NULL, NULL);
+  DEBUG ((EFI_D_ERROR, "Detected Xen version %d.%d\n",
+          XenVersion >> 16, XenVersion & 0xFFFF));
+  mXenInfo.VersionMajor = XenVersion >> 16;
+  mXenInfo.VersionMinor = XenVersion & 0xFFFF;
+
+  /* TBD: Locate hvm_info and reserve it away. */
+  mXenInfo.HvmInfo = NULL;
+
+  BuildGuidDataHob (
+    &gEfiXenInfoGuid,
+    &mXenInfo,
+    sizeof(mXenInfo)
+    );
+
+  return EFI_SUCCESS;
+}
+
+/**
+  Figures out if we are running inside Xen HVM.
+
+  @return UINT32     CPUID index used to connect to HV.
+
+**/
+UINT32
+XenDetect (
+  VOID
+  )
+{
+
+  UINT32 XenLeaf;
+  UINT8 Signature[13];
+
+  for (XenLeaf = 0x40000000; XenLeaf < 0x40010000; XenLeaf += 0x100) {
+    AsmCpuid (XenLeaf, NULL, (UINT32 *) &Signature[0],
+              (UINT32 *) &Signature[4],
+              (UINT32 *) &Signature[8]);
+    Signature[12] = '\0';
+
+    if (!AsciiStrCmp ((CHAR8 *) Signature, "XenVMMXenVMM")) {
+      return XenLeaf;
+    }
+  }
+
+  return 0;
+}
+
+/**
+  Perform Xen PEI initialization.
+
+  @return EFI_SUCCESS     Xen initialized successfully
+  @return EFI_NOT_FOUND   Not running under Xen
+
+**/
+EFI_STATUS
+InitializeXen (
+  VOID
+  )
+{
+  UINT32 XenLeaf;
+
+  XenLeaf = XenDetect ();
+
+  if (XenLeaf == 0) {
+    return EFI_NOT_FOUND;
+  }
+
+  DEBUG ((EFI_D_INFO, "Xen was detected\n"));
+
+  XenConnect (XenLeaf);
+
+  //
+  // Reserve away HVMLOADER reserved memory [0xFC000000,0xFD000000).
+  // This needs to match HVMLOADER RESERVED_MEMBASE/RESERVED_MEMSIZE.
+  //
+  AddReservedMemoryBaseSizeHob (0xFC000000, 0x1000000);
+
+  return EFI_SUCCESS;
+}